import android.content.res.AssetManager;
import android.content.res.Resources;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.WeakHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import de.robv.android.xposed.XposedBridge;
/**
* Helpers that simplify hooking and calling methods/constructors, getting and settings fields, ...
* 这个助手提供简单的拦截和调用方法/构造方法。获取和设置类的属性
*/
public final class XposedHelpers {
// 构造器是私有的，说明只能通过内部的静态方法实例化
private XposedHelpers() {}
/**
* 内部设置缓存
*/
private static final HashMap<String, Field> fieldCache = new HashMap<String, Field>();
private static final HashMap<String, Method> methodCache = new HashMap<String, Method>();
private static final HashMap<String, Constructor<?>> constructorCache = new HashMap<String, Constructor<?>>();
private static final WeakHashMap<Object, HashMap<String, Object>> additionalFields = new WeakHashMap<Object, HashMap<String, Object>>();
private static final HashMap<String, ThreadLocal<AtomicInteger>> sMethodDepth = new HashMap<String, ThreadLocal<AtomicInteger>>();
/**
* Look up a class with the specified class loader.
* 寻找一个类通过指定的类加载器
*
* <p>There are various allowed syntaxes for the class name, but it's recommended to use one of
* these:
* <ul>
* <li>{@code java.lang.String}
* <li>{@code java.lang.String[]} (array)
* <li>{@code android.app.ActivityThread.ResourcesKey}
* <li>{@code android.app.ActivityThread$ResourcesKey}
* </ul>
*
* @param className The class name in one of the formats mentioned above.
* @param classLoader The class loader, or {@code null} for the boot class loader.
* @return A reference to the class.
* @throws ClassNotFoundError In case the class was not found.
*/
public static Class<?> findClass(String className, ClassLoader classLoader) {
if (classLoader == null)
classLoader = XposedBridge.BOOTCLASSLOADER;
try {
return ClassUtils.getClass(classLoader, className, false);
} catch (ClassNotFoundException e) {
throw new ClassNotFoundError(e);
}
}
/**
* Look up and return a class if it exists.
* Like {@link #findClass}, but doesn't throw an exception if the class doesn't exist.
* 寻找一个类，如果找到了就返回，没有就返回null，没找到不会报错
*
* @param className The class name.
* @param classLoader The class loader, or {@code null} for the boot class loader.
* @return A reference to the class, or {@code null} if it doesn't exist.
*/
public static Class<?> findClassIfExists(String className, ClassLoader classLoader) {
try {
return findClass(className, classLoader);
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a field in a class and set it to accessible.
* 在指定的类中寻找一个字段，并且设置他们为可访问的，然后将他们通过键值对缓存起来
*
* @param clazz The class which either declares or inherits the field.
* @param fieldName The field name.
* @return A reference to the field.
* @throws NoSuchFieldError In case the field was not found.
*/
public static Field findField(Class<?> clazz, String fieldName) {
String fullFieldName = clazz.getName() + '#' + fieldName;
if (fieldCache.containsKey(fullFieldName)) {
Field field = fieldCache.get(fullFieldName);
if (field == null)
throw new NoSuchFieldError(fullFieldName);
return field;
}
try {
Field field = findFieldRecursiveImpl(clazz, fieldName);
field.setAccessible(true);
fieldCache.put(fullFieldName, field);
return field;
} catch (NoSuchFieldException e) {
fieldCache.put(fullFieldName, null);
throw new NoSuchFieldError(fullFieldName);
}
}
/**
* Look up and return a field if it exists.
* Like {@link #findField}, but doesn't throw an exception if the field doesn't exist.
* 在指定的类中寻找一个字段，如果找到了就返回，没有就返回null
*
* @param clazz The class which either declares or inherits the field.
* @param fieldName The field name.
* @return A reference to the field, or {@code null} if it doesn't exist.
*/
public static Field findFieldIfExists(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName);
} catch (NoSuchFieldError e) {
return null;
}
}
/**
* 在指定的类及其父类中寻找指定名称的字段
*
* @param clazz
* @param fieldName
* @return
* @throws NoSuchFieldException
*/
private static Field findFieldRecursiveImpl(Class<?> clazz, String fieldName) throws NoSuchFieldException {
try {
return clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
while (true) {
clazz = clazz.getSuperclass();
if (clazz == null || clazz.equals(Object.class))
break;
try {
return clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException ignored) {}
}
throw e;
}
}
/**
* Returns the first field of the given type in a class.
* Might be useful for Proguard'ed classes to identify fields with unique types.
* 在指定的类中寻找指定的类型的字段，返回第一个匹配的字段
*
* @param clazz The class which either declares or inherits the field.
* @param type The type of the field.
* @return A reference to the first field of the given type.
* @throws NoSuchFieldError In case no matching field was not found.
*/
public static Field findFirstFieldByExactType(Class<?> clazz, Class<?> type) {
Class<?> clz = clazz;
do {
for (Field field : clz.getDeclaredFields()) {
if (field.getType() == type) {
field.setAccessible(true);
return field;
}
}
} while ((clz = clz.getSuperclass()) != null);
throw new NoSuchFieldError("Field of type " + type.getName() + " in class " + clazz.getName());
}
/**
* 寻找一个指定的方法并且hook它
* Look up a method and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookMethod(Class<?> clazz, String methodName, Object... parameterTypesAndCallback) {
if (parameterTypesAndCallback.length == 0 || !(parameterTypesAndCallback[parameterTypesAndCallback.length-1] instanceof XC_MethodHook))
throw new IllegalArgumentException("no callback defined");
XC_MethodHook callback = (XC_MethodHook) parameterTypesAndCallback[parameterTypesAndCallback.length-1];
Method m = findMethodExact(clazz, methodName, getParameterClasses(clazz.getClassLoader(), parameterTypesAndCallback));
return XposedBridge.hookMethod(m, callback);
}
/**
* Look up a method and hook it. The last argument must be the callback for the hook.
*
* <p>This combines calls to {@link #findMethodExact(Class, String, Object...)} and
* {@link XposedBridge#hookMethod}.
*
* <p class="warning">The method must be declared or overridden in the given class, inherited
* methods are not considered! That's because each method implementation exists only once in
* the memory, and when classes inherit it, they just get another reference to the implementation.
* Hooking a method therefore applies to all classes inheriting the same implementation. You
* have to expect that the hook applies to subclasses (unless they override the method), but you
* shouldn't have to worry about hooks applying to superclasses, hence this "limitation".
* There could be undesired or even dangerous hooks otherwise, e.g. if you hook
* {@code SomeClass.equals()} and that class doesn't override the {@code equals()} on some ROMs,
* making you hook {@code Object.equals()} instead.
*
* <p>There are two ways to specify the parameter types. If you already have a reference to the
* {@link Class}, use that. For Android framework classes, you can often use something like
* {@code String.class}. If you don't have the class reference, you can simply use the
* full class name as a string, e.g. {@code java.lang.String} or {@code com.example.MyClass}.
* It will be passed to {@link #findClass} with the same class loader that is used for the target
* method, see its documentation for the allowed notations.
*
* <p>Primitive types, such as {@code int}, can be specified using {@code int.class} (recommended)
* or {@code Integer.TYPE}. Note that {@code Integer.class} doesn't refer to {@code int} but to
* {@code Integer}, which is a normal class (boxed primitive). Therefore it must not be used when
* the method expects an {@code int} parameter - it has to be used for {@code Integer} parameters
* though, so check the method signature in detail.
*
* <p>As last argument to this method (after the list of target method parameters), you need
* to specify the callback that should be executed when the method is invoked. It's usually
* an anonymous subclass of {@link XC_MethodHook} or {@link XC_MethodReplacement}.
*
* <p><b>Example</b>
* <pre class="prettyprint">
* // In order to hook this method ...
* package com.example;
* public class SomeClass {
* public int doSomething(String s, int i, MyClass m) {
* ...
* }
* }
*
* // ... you can use this call:
* findAndHookMethod("com.example.SomeClass", lpparam.classLoader, String.class, int.class, "com.example.MyClass", new XC_MethodHook() {
* @Override
* protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
* String oldText = (String) param.args[0];
* Log.d("MyModule", oldText);
*
* param.args[0] = "test";
* param.args[1] = 42; // auto-boxing is working here
* setBooleanField(param.args[2], "great", true);
*
* // This would not work (as MyClass can't be resolved at compile time):
* // MyClass myClass = (MyClass) param.args[2];
* // myClass.great = true;
* }
* });
* </pre>
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypesAndCallback The parameter types of the target method, plus the callback.
* @throws NoSuchMethodError In case the method was not found.
* @throws ClassNotFoundError In case the target class or one of the parameter types couldn't be resolved.
* @return An object which can be used to remove the callback again.
*/
public static XC_MethodHook.Unhook findAndHookMethod(String className, ClassLoader classLoader, String methodName, Object... parameterTypesAndCallback) {
return findAndHookMethod(findClass(className, classLoader), methodName, parameterTypesAndCallback);
}
/**
* Look up a method in a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Method findMethodExact(Class<?> clazz, String methodName, Object... parameterTypes) {
return findMethodExact(clazz, methodName, getParameterClasses(clazz.getClassLoader(), parameterTypes));
}
/**
* Look up and return a method if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Method findMethodExactIfExists(Class<?> clazz, String methodName, Object... parameterTypes) {
try {
return findMethodExact(clazz, methodName, parameterTypes);
} catch (NoSuchMethodError e) {
return null;
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a method in a class and set it to accessible.
* The method must be declared or overridden in the given class.
*
* <p>See {@link #findAndHookMethod(String, ClassLoader, String, Object...)} for details about
* the method and parameter type resolution.
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypes The parameter types of the target method.
* @throws NoSuchMethodError In case the method was not found.
* @throws ClassNotFoundError In case the target class or one of the parameter types couldn't be resolved.
* @return A reference to the method.
*/
public static Method findMethodExact(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) {
return findMethodExact(findClass(className, classLoader), methodName, getParameterClasses(classLoader, parameterTypes));
}
/**
* Look up and return a method if it exists.
* Like {@link #findMethodExact(String, ClassLoader, String, Object...)}, but doesn't throw an
* exception if the method doesn't exist.
*
* @param className The name of the class which implements the method.
* @param classLoader The class loader for resolving the target and parameter classes.
* @param methodName The target method name.
* @param parameterTypes The parameter types of the target method.
* @return A reference to the method, or {@code null} if it doesn't exist.
*/
public static Method findMethodExactIfExists(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) {
try {
return findMethodExact(className, classLoader, methodName, parameterTypes);
} catch (NoSuchMethodError e) {
return null;
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a method in a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*
* <p>This variant requires that you already have reference to all the parameter types.
*/
public static Method findMethodExact(Class<?> clazz, String methodName, Class<?>... parameterTypes) {
String fullMethodName = clazz.getName() + '#' + methodName + getParametersString(parameterTypes) + "#exact";
if (methodCache.containsKey(fullMethodName)) {
Method method = methodCache.get(fullMethodName);
if (method == null)
throw new NoSuchMethodError(fullMethodName);
return method;
}
try {
Method method = clazz.getDeclaredMethod(methodName, parameterTypes);
method.setAccessible(true);
methodCache.put(fullMethodName, method);
return method;
} catch (NoSuchMethodException e) {
methodCache.put(fullMethodName, null);
throw new NoSuchMethodError(fullMethodName);
}
}
/**
* Returns an array of all methods declared/overridden in a class with the specified parameter types.
*
* <p>The return type is optional, it will not be compared if it is {@code null}.
* Use {@code void.class} if you want to search for methods returning nothing.
*
* @param clazz The class to look in.
* @param returnType The return type, or {@code null} (see above).
* @param parameterTypes The parameter types.
* @return An array with matching methods, all set to accessible already.
*/
public static Method[] findMethodsByExactParameters(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes) {
List<Method> result = new LinkedList<Method>();
for (Method method : clazz.getDeclaredMethods()) {
if (returnType != null && returnType != method.getReturnType())
continue;
Class<?>[] methodParameterTypes = method.getParameterTypes();
if (parameterTypes.length != methodParameterTypes.length)
continue;
boolean match = true;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != methodParameterTypes[i]) {
match = false;
break;
}
}
if (!match)
continue;
method.setAccessible(true);
result.add(method);
}
return result.toArray(new Method[result.size()]);
}
/**
* Look up a method in a class and set it to accessible.
* 寻找方法，找到了后将其设置为可以访问的
*
* <p>This does'nt only look for exact matches, but for the best match. All considered candidates
* must be compatible with the given parameter types, i.e. the parameters must be assignable
* to the method's formal parameters. Inherited methods are considered here.
*
* @param clazz The class which declares, inherits or overrides the method.
* @param methodName The method name.
* @param parameterTypes The types of the method's parameters.
* @return A reference to the best-matching method.
* @throws NoSuchMethodError In case no suitable method was found.
*/
public static Method findMethodBestMatch(Class<?> clazz, String methodName, Class<?>... parameterTypes) {
// 优先查看缓存
String fullMethodName = clazz.getName() + '#' + methodName + getParametersString(parameterTypes) + "#bestmatch";
if (methodCache.containsKey(fullMethodName)) {
Method method = methodCache.get(fullMethodName);
if (method == null)
throw new NoSuchMethodError(fullMethodName);
return method;
}
try {
Method method = findMethodExact(clazz, methodName, parameterTypes);
methodCache.put(fullMethodName, method);
return method;
} catch (NoSuchMethodError ignored) {}
Method bestMatch = null;
Class<?> clz = clazz;
boolean considerPrivateMethods = true;
do {
for (Method method : clz.getDeclaredMethods()) {
// don't consider private methods of superclasses
if (!considerPrivateMethods && Modifier.isPrivate(method.getModifiers()))
continue;
// compare name and parameters
if (method.getName().equals(methodName) && ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
// get accessible version of method
if (bestMatch == null || MemberUtils.compareParameterTypes(
method.getParameterTypes(),
bestMatch.getParameterTypes(),
parameterTypes) < 0) {
bestMatch = method;
}
}
}
considerPrivateMethods = false;
} while ((clz = clz.getSuperclass()) != null);
if (bestMatch != null) {
bestMatch.setAccessible(true);
methodCache.put(fullMethodName, bestMatch);
return bestMatch;
} else {
NoSuchMethodError e = new NoSuchMethodError(fullMethodName);
methodCache.put(fullMethodName, null);
throw e;
}
}
/**
* Look up a method in a class and set it to accessible.
*
* <p>See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects.
*/
public static Method findMethodBestMatch(Class<?> clazz, String methodName, Object... args) {
return findMethodBestMatch(clazz, methodName, getParameterTypes(args));
}
/**
* Look up a method in a class and set it to accessible.
*
* <p>See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects. For any item that is
* {@code null}, the type is taken from {@code parameterTypes} instead.
*/
public static Method findMethodBestMatch(Class<?> clazz, String methodName, Class<?>[] parameterTypes, Object[] args) {
Class<?>[] argsClasses = null;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != null)
continue;
if (argsClasses == null)
argsClasses = getParameterTypes(args);
parameterTypes[i] = argsClasses[i];
}
return findMethodBestMatch(clazz, methodName, parameterTypes);
}
/**
* Returns an array with the classes of the given objects.
* 获取给定对象的数组的类型
*/
public static Class<?>[] getParameterTypes(Object... args) {
Class<?>[] clazzes = new Class<?>[args.length];
for (int i = 0; i < args.length; i++) {
clazzes[i] = (args[i] != null) ? args[i].getClass() : null;
}
return clazzes;
}
/**
* Retrieve classes from an array, where each element might either be a Class
* already, or a String with the full class name.
*/
private static Class<?>[] getParameterClasses(ClassLoader classLoader, Object[] parameterTypesAndCallback) {
Class<?>[] parameterClasses = null;
for (int i = parameterTypesAndCallback.length - 1; i >= 0; i--) {
Object type = parameterTypesAndCallback[i];
if (type == null)
throw new ClassNotFoundError("parameter type must not be null", null);
// ignore trailing callback
if (type instanceof XC_MethodHook)
continue;
if (parameterClasses == null)
parameterClasses = new Class<?>[i+1];
if (type instanceof Class)
parameterClasses[i] = (Class<?>) type;
else if (type instanceof String)
parameterClasses[i] = findClass((String) type, classLoader);
else
throw new ClassNotFoundError("parameter type must either be specified as Class or String", null);
}
// if there are no arguments for the method
if (parameterClasses == null)
parameterClasses = new Class<?>[0];
return parameterClasses;
}
/**
* Returns an array of the given classes.
*/
public static Class<?>[] getClassesAsArray(Class<?>... clazzes) {
return clazzes;
}
private static String getParametersString(Class<?>... clazzes) {
StringBuilder sb = new StringBuilder("(");
boolean first = true;
for (Class<?> clazz : clazzes) {
if (first)
first = false;
else
sb.append(",");
if (clazz != null)
sb.append(clazz.getCanonicalName());
else
sb.append("null");
}
sb.append(")");
return sb.toString();
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor<?> findConstructorExact(Class<?> clazz, Object... parameterTypes) {
return findConstructorExact(clazz, getParameterClasses(clazz.getClassLoader(), parameterTypes));
}
/**
* Look up and return a constructor if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor<?> findConstructorExactIfExists(Class<?> clazz, Object... parameterTypes) {
try {
return findConstructorExact(clazz, parameterTypes);
} catch (NoSuchMethodError e) {
return null;
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor<?> findConstructorExact(String className, ClassLoader classLoader, Object... parameterTypes) {
return findConstructorExact(findClass(className, classLoader), getParameterClasses(classLoader, parameterTypes));
}
/**
* Look up and return a constructor if it exists.
* See {@link #findMethodExactIfExists(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor<?> findConstructorExactIfExists(String className, ClassLoader classLoader, Object... parameterTypes) {
try {
return findConstructorExact(className, classLoader, parameterTypes);
} catch (NoSuchMethodError e) {
return null;
} catch (ClassNotFoundError e) {
return null;
}
}
/**
* Look up a constructor of a class and set it to accessible.
* See {@link #findMethodExact(String, ClassLoader, String, Object...)} for details.
*/
public static Constructor<?> findConstructorExact(Class<?> clazz, Class<?>... parameterTypes) {
String fullConstructorName = clazz.getName() + getParametersString(parameterTypes) + "#exact";
if (constructorCache.containsKey(fullConstructorName)) {
Constructor<?> constructor = constructorCache.get(fullConstructorName);
if (constructor == null)
throw new NoSuchMethodError(fullConstructorName);
return constructor;
}
try {
Constructor<?> constructor = clazz.getDeclaredConstructor(parameterTypes);
constructor.setAccessible(true);
constructorCache.put(fullConstructorName, constructor);
return constructor;
} catch (NoSuchMethodException e) {
constructorCache.put(fullConstructorName, null);
throw new NoSuchMethodError(fullConstructorName);
}
}
/**
* Look up a constructor and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookConstructor(Class<?> clazz, Object... parameterTypesAndCallback) {
if (parameterTypesAndCallback.length == 0 || !(parameterTypesAndCallback[parameterTypesAndCallback.length-1] instanceof XC_MethodHook))
throw new IllegalArgumentException("no callback defined");
XC_MethodHook callback = (XC_MethodHook) parameterTypesAndCallback[parameterTypesAndCallback.length-1];
Constructor<?> m = findConstructorExact(clazz, getParameterClasses(clazz.getClassLoader(), parameterTypesAndCallback));
return XposedBridge.hookMethod(m, callback);
}
/**
* Look up a constructor and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
* for details.
*/
public static XC_MethodHook.Unhook findAndHookConstructor(String className, ClassLoader classLoader, Object... parameterTypesAndCallback) {
return findAndHookConstructor(findClass(className, classLoader), parameterTypesAndCallback);
}
/**
* Look up a constructor in a class and set it to accessible.
*
* <p>See {@link #findMethodBestMatch(Class, String, Class...)} for details.
*/
public static Constructor<?> findConstructorBestMatch(Class<?> clazz, Class<?>... parameterTypes) {
String fullConstructorName = clazz.getName() + getParametersString(parameterTypes) + "#bestmatch";
if (constructorCache.containsKey(fullConstructorName)) {
Constructor<?> constructor = constructorCache.get(fullConstructorName);
if (constructor == null)
throw new NoSuchMethodError(fullConstructorName);
return constructor;
}
try {
Constructor<?> constructor = findConstructorExact(clazz, parameterTypes);
constructorCache.put(fullConstructorName, constructor);
return constructor;
} catch (NoSuchMethodError ignored) {}
Constructor<?> bestMatch = null;
Constructor<?>[] constructors = clazz.getDeclaredConstructors();
for (Constructor<?> constructor : constructors) {
// compare name and parameters
if (ClassUtils.isAssignable(parameterTypes, constructor.getParameterTypes(), true)) {
// get accessible version of method
if (bestMatch == null || MemberUtils.compareParameterTypes(
constructor.getParameterTypes(),
bestMatch.getParameterTypes(),
parameterTypes) < 0) {
bestMatch = constructor;
}
}
}
if (bestMatch != null) {
bestMatch.setAccessible(true);
constructorCache.put(fullConstructorName, bestMatch);
return bestMatch;
} else {
NoSuchMethodError e = new NoSuchMethodError(fullConstructorName);
constructorCache.put(fullConstructorName, null);
throw e;
}
}
/**
* Look up a constructor in a class and set it to accessible.
*
* <p>See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects.
*/
public static Constructor<?> findConstructorBestMatch(Class<?> clazz, Object... args) {
return findConstructorBestMatch(clazz, getParameterTypes(args));
}
/**
* Look up a constructor in a class and set it to accessible.
*
* <p>See {@link #findMethodBestMatch(Class, String, Class...)} for details. This variant
* determines the parameter types from the classes of the given objects. For any item that is
* {@code null}, the type is taken from {@code parameterTypes} instead.
*/
public static Constructor<?> findConstructorBestMatch(Class<?> clazz, Class<?>[] parameterTypes, Object[] args) {
Class<?>[] argsClasses = null;
for (int i = 0; i < parameterTypes.length; i++) {
if (parameterTypes[i] != null)
continue;
if (argsClasses == null)
argsClasses = getParameterTypes(args);
parameterTypes[i] = argsClasses[i];
}
return findConstructorBestMatch(clazz, parameterTypes);
}
/**
* Thrown when a class loader is unable to find a class. Unlike {@link ClassNotFoundException},
* callers are not forced to explicitly catch this. If uncaught, the error will be passed to the
* next caller in the stack.
*/
public static final class ClassNotFoundError extends Error {
private static final long serialVersionUID = -1070936889459514628L;
/** @hide */
public ClassNotFoundError(Throwable cause) {
super(cause);
}
/** @hide */
public ClassNotFoundError(String detailMessage, Throwable cause) {
super(detailMessage, cause);
}
}
//#################################################################################################
/** Sets the value of an object field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setObjectField(Object obj, String fieldName, Object value) {
try {
findField(obj.getClass(), fieldName).set(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code boolean} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setBooleanField(Object obj, String fieldName, boolean value) {
try {
findField(obj.getClass(), fieldName).setBoolean(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code byte} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setByteField(Object obj, String fieldName, byte value) {
try {
findField(obj.getClass(), fieldName).setByte(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code char} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setCharField(Object obj, String fieldName, char value) {
try {
findField(obj.getClass(), fieldName).setChar(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code double} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setDoubleField(Object obj, String fieldName, double value) {
try {
findField(obj.getClass(), fieldName).setDouble(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code float} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setFloatField(Object obj, String fieldName, float value) {
try {
findField(obj.getClass(), fieldName).setFloat(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of an {@code int} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setIntField(Object obj, String fieldName, int value) {
try {
findField(obj.getClass(), fieldName).setInt(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code long} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setLongField(Object obj, String fieldName, long value) {
try {
findField(obj.getClass(), fieldName).setLong(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a {@code short} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static void setShortField(Object obj, String fieldName, short value) {
try {
findField(obj.getClass(), fieldName).setShort(obj, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/** Returns the value of an object field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static Object getObjectField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).get(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** For inner classes, returns the surrounding instance, i.e. the {@code this} reference of the surrounding class. */
public static Object getSurroundingThis(Object obj) {
return getObjectField(obj, "this$0");
}
/** Returns the value of a {@code boolean} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
@SuppressWarnings("BooleanMethodIsAlwaysInverted")
public static boolean getBooleanField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getBoolean(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code byte} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static byte getByteField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getByte(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code char} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static char getCharField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getChar(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code double} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static double getDoubleField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getDouble(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code float} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static float getFloatField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getFloat(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of an {@code int} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static int getIntField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getInt(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code long} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static long getLongField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getLong(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a {@code short} field in the given object instance. A class reference is not sufficient! See also {@link #findField}. */
public static short getShortField(Object obj, String fieldName) {
try {
return findField(obj.getClass(), fieldName).getShort(obj);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/** Sets the value of a static object field in the given class. See also {@link #findField}. */
public static void setStaticObjectField(Class<?> clazz, String fieldName, Object value) {
try {
findField(clazz, fieldName).set(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code boolean} field in the given class. See also {@link #findField}. */
public static void setStaticBooleanField(Class<?> clazz, String fieldName, boolean value) {
try {
findField(clazz, fieldName).setBoolean(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code byte} field in the given class. See also {@link #findField}. */
public static void setStaticByteField(Class<?> clazz, String fieldName, byte value) {
try {
findField(clazz, fieldName).setByte(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code char} field in the given class. See also {@link #findField}. */
public static void setStaticCharField(Class<?> clazz, String fieldName, char value) {
try {
findField(clazz, fieldName).setChar(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code double} field in the given class. See also {@link #findField}. */
public static void setStaticDoubleField(Class<?> clazz, String fieldName, double value) {
try {
findField(clazz, fieldName).setDouble(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code float} field in the given class. See also {@link #findField}. */
public static void setStaticFloatField(Class<?> clazz, String fieldName, float value) {
try {
findField(clazz, fieldName).setFloat(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code int} field in the given class. See also {@link #findField}. */
public static void setStaticIntField(Class<?> clazz, String fieldName, int value) {
try {
findField(clazz, fieldName).setInt(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code long} field in the given class. See also {@link #findField}. */
public static void setStaticLongField(Class<?> clazz, String fieldName, long value) {
try {
findField(clazz, fieldName).setLong(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code short} field in the given class. See also {@link #findField}. */
public static void setStaticShortField(Class<?> clazz, String fieldName, short value) {
try {
findField(clazz, fieldName).setShort(null, value);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/** Returns the value of a static object field in the given class. See also {@link #findField}. */
public static Object getStaticObjectField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).get(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Returns the value of a static {@code boolean} field in the given class. See also {@link #findField}. */
public static boolean getStaticBooleanField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getBoolean(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code byte} field in the given class. See also {@link #findField}. */
public static byte getStaticByteField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getByte(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code char} field in the given class. See also {@link #findField}. */
public static char getStaticCharField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getChar(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code double} field in the given class. See also {@link #findField}. */
public static double getStaticDoubleField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getDouble(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code float} field in the given class. See also {@link #findField}. */
public static float getStaticFloatField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getFloat(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code int} field in the given class. See also {@link #findField}. */
public static int getStaticIntField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getInt(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code long} field in the given class. See also {@link #findField}. */
public static long getStaticLongField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getLong(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
/** Sets the value of a static {@code short} field in the given class. See also {@link #findField}. */
public static short getStaticShortField(Class<?> clazz, String fieldName) {
try {
return findField(clazz, fieldName).getShort(null);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
}
}
//#################################################################################################
/**
* Calls an instance or static method of the given object.
* The method is resolved using {@link #findMethodBestMatch(Class, String, Object...)}.
*
* @param obj The object instance. A class reference is not sufficient!
* @param methodName The method name.
* @param args The arguments for the method call.
* @throws NoSuchMethodError In case no suitable method was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
*/
public static Object callMethod(Object obj, String methodName, Object... args) {
try {
return findMethodBestMatch(obj.getClass(), methodName, args).invoke(obj, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls an instance or static method of the given object.
* See {@link #callMethod(Object, String, Class[], Object...)}.
*
* <p>This variant allows you to specify parameter types, which can help in case there are multiple
* methods with the same name, especially if you call it with {@code null} parameters.
*/
public static Object callMethod(Object obj, String methodName, Class<?>[] parameterTypes, Object... args) {
try {
return findMethodBestMatch(obj.getClass(), methodName, parameterTypes, args).invoke(obj, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls a static method of the given class.
* The method is resolved using {@link #findMethodBestMatch(Class, String, Object...)}.
*
* @param clazz The class reference.
* @param methodName The method name.
* @param args The arguments for the method call.
* @throws NoSuchMethodError In case no suitable method was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
*/
public static Object callStaticMethod(Class<?> clazz, String methodName, Object... args) {
try {
return findMethodBestMatch(clazz, methodName, args).invoke(null, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* Calls a static method of the given class.
* See {@link #callStaticMethod(Class, String, Object...)}.
*
* <p>This variant allows you to specify parameter types, which can help in case there are multiple
* methods with the same name, especially if you call it with {@code null} parameters.
*/
public static Object callStaticMethod(Class<?> clazz, String methodName, Class<?>[] parameterTypes, Object... args) {
try {
return findMethodBestMatch(clazz, methodName, parameterTypes, args).invoke(null, args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
}
}
/**
* This class provides a wrapper for an exception thrown by a method invocation.
*
* @see #callMethod(Object, String, Object...)
* @see #callStaticMethod(Class, String, Object...)
* @see #newInstance(Class, Object...)
*/
public static final class InvocationTargetError extends Error {
private static final long serialVersionUID = -1070936889459514628L;
/** @hide */
public InvocationTargetError(Throwable cause) {
super(cause);
}
}
//#################################################################################################
/**
* Creates a new instance of the given class.
* The constructor is resolved using {@link #findConstructorBestMatch(Class, Object...)}.
*
* @param clazz The class reference.
* @param args The arguments for the constructor call.
* @throws NoSuchMethodError In case no suitable constructor was found.
* @throws InvocationTargetError In case an exception was thrown by the invoked method.
* @throws InstantiationError In case the class cannot be instantiated.
*/
public static Object newInstance(Class<?> clazz, Object... args) {
try {
return findConstructorBestMatch(clazz, args).newInstance(args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
} catch (InstantiationException e) {
throw new InstantiationError(e.getMessage());
}
}
/**
* Creates a new instance of the given class.
* See {@link #newInstance(Class, Object...)}.
*
* <p>This variant allows you to specify parameter types, which can help in case there are multiple
* constructors with the same name, especially if you call it with {@code null} parameters.
*/
public static Object newInstance(Class<?> clazz, Class<?>[] parameterTypes, Object... args) {
try {
return findConstructorBestMatch(clazz, parameterTypes, args).newInstance(args);
} catch (IllegalAccessException e) {
// should not happen
XposedBridge.log(e);
throw new IllegalAccessError(e.getMessage());
} catch (IllegalArgumentException e) {
throw e;
} catch (InvocationTargetException e) {
throw new InvocationTargetError(e.getCause());
} catch (InstantiationException e) {
throw new InstantiationError(e.getMessage());
}
}
//#################################################################################################
/**
* Attaches any value to an object instance. This simulates adding an instance field.
* The value can be retrieved again with {@link #getAdditionalInstanceField}.
*
* @param obj The object instance for which the value should be stored.
* @param key The key in the value map for this object instance.
* @param value The value to store.
* @return The previously stored value for this instance/key combination, or {@code null} if there was none.
*/
public static Object setAdditionalInstanceField(Object obj, String key, Object value) {
if (obj == null)
throw new NullPointerException("object must not be null");
if (key == null)
throw new NullPointerException("key must not be null");
HashMap<String, Object> objectFields;
synchronized (additionalFields) {
objectFields = additionalFields.get(obj);
if (objectFields == null) {
objectFields = new HashMap<String, Object>();
additionalFields.put(obj, objectFields);
}
}
synchronized (objectFields) {
return objectFields.put(key, value);
}
}
/**
* Returns a value which was stored with {@link #setAdditionalInstanceField}.
*
* @param obj The object instance for which the value has been stored.
* @param key The key in the value map for this object instance.
* @return The stored value for this instance/key combination, or {@code null} if there is none.
*/
public static Object getAdditionalInstanceField(Object obj, String key) {
if (obj == null)
throw new NullPointerException("object must not be null");
if (key == null)
throw new NullPointerException("key must not be null");
HashMap<String, Object> objectFields;
synchronized (additionalFields) {
objectFields = additionalFields.get(obj);
if (objectFields == null)
return null;
}
synchronized (objectFields) {
return objectFields.get(key);
}
}
/**
* Removes and returns a value which was stored with {@link #setAdditionalInstanceField}.
*
* @param obj The object instance for which the value has been stored.
* @param key The key in the value map for this object instance.
* @return The previously stored value for this instance/key combination, or {@code null} if there was none.
*/
public static Object removeAdditionalInstanceField(Object obj, String key) {
if (obj == null)
throw new NullPointerException("object must not be null");
if (key == null)
throw new NullPointerException("key must not be null");
HashMap<String, Object> objectFields;
synchronized (additionalFields) {
objectFields = additionalFields.get(obj);
if (objectFields == null)
return null;
}
synchronized (objectFields) {
return objectFields.remove(key);
}
}
/** Like {@link #setAdditionalInstanceField}, but the value is stored for the class of {@code obj}. */
public static Object setAdditionalStaticField(Object obj, String key, Object value) {
return setAdditionalInstanceField(obj.getClass(), key, value);
}
/** Like {@link #getAdditionalInstanceField}, but the value is returned for the class of {@code obj}. */
public static Object getAdditionalStaticField(Object obj, String key) {
return getAdditionalInstanceField(obj.getClass(), key);
}
/** Like {@link #removeAdditionalInstanceField}, but the value is removed and returned for the class of {@code obj}. */
public static Object removeAdditionalStaticField(Object obj, String key) {
return removeAdditionalInstanceField(obj.getClass(), key);
}
/** Like {@link #setAdditionalInstanceField}, but the value is stored for {@code clazz}. */
public static Object setAdditionalStaticField(Class<?> clazz, String key, Object value) {
return setAdditionalInstanceField(clazz, key, value);
}
/** Like {@link #setAdditionalInstanceField}, but the value is returned for {@code clazz}. */
public static Object getAdditionalStaticField(Class<?> clazz, String key) {
return getAdditionalInstanceField(clazz, key);
}
/** Like {@link #setAdditionalInstanceField}, but the value is removed and returned for {@code clazz}. */
public static Object removeAdditionalStaticField(Class<?> clazz, String key) {
return removeAdditionalInstanceField(clazz, key);
}
//#################################################################################################
/**
* Loads an asset from a resource object and returns the content as {@code byte} array.
*
* @param res The resources from which the asset should be loaded.
* @param path The path to the asset, as in {@link AssetManager#open}.
* @return The content of the asset.
*/
public static byte[] assetAsByteArray(Resources res, String path) throws IOException {
InputStream is = res.getAssets().open(path);
ByteArrayOutputStream buf = new ByteArrayOutputStream();
byte[] temp = new byte[1024];
int read;
while ((read = is.read(temp)) > 0) {
buf.write(temp, 0, read);
}
is.close();
return buf.toByteArray();
}
/**
* Returns the lowercase hex string representation of a file's MD5 hash sum.
*/
public static String getMD5Sum(String file) throws IOException {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
InputStream is = new FileInputStream(file);
byte[] buffer = new byte[8192];
int read;
while ((read = is.read(buffer)) > 0) {
digest.update(buffer, 0, read);
}
is.close();
byte[] md5sum = digest.digest();
BigInteger bigInt = new BigInteger(1, md5sum);
return bigInt.toString(16);
} catch (NoSuchAlgorithmException e) {
return "";
}
}
//#################################################################################################
/**
* Increments the depth counter for the given method.
*
* <p>The intention of the method depth counter is to keep track of the call depth for recursive
* methods, e.g. to override parameters only for the outer call. The Xposed framework uses this
* to load drawable replacements only once per call, even when multiple
* {@link Resources#getDrawable} variants call each other.
*
* @param method The method name. Should be prefixed with a unique, module-specific string.
* @return The updated depth.
*/
public static int incrementMethodDepth(String method) {
return getMethodDepthCounter(method).get().incrementAndGet();
}
/**
* Decrements the depth counter for the given method.
* See {@link #incrementMethodDepth} for details.
*
* @param method The method name. Should be prefixed with a unique, module-specific string.
* @return The updated depth.
*/
public static int decrementMethodDepth(String method) {
return getMethodDepthCounter(method).get().decrementAndGet();
}
/**
* Returns the current depth counter for the given method.
* See {@link #incrementMethodDepth} for details.
*
* @param method The method name. Should be prefixed with a unique, module-specific string.
* @return The updated depth.
*/
public static int getMethodDepth(String method) {
return getMethodDepthCounter(method).get().get();
}
private static ThreadLocal<AtomicInteger> getMethodDepthCounter(String method) {
synchronized (sMethodDepth) {
ThreadLocal<AtomicInteger> counter = sMethodDepth.get(method);
if (counter == null) {
counter = new ThreadLocal<AtomicInteger>() {
protected AtomicInteger initialValue() {
return new AtomicInteger();
}
};
sMethodDepth.put(method, counter);
}
return counter;
}
}
//#################################################################################################
// TODO helpers for view traversing
/*To make it easier, I will try and implement some more helpers:
- add view before/after existing view (I already mentioned that I think)
- get index of view in its parent
- get next/previous sibling (maybe with an optional argument "type", that might be ImageView.class and gives you the next sibling that is an ImageView)?
- get next/previous element (similar to the above, but would also work if the next element has a different parent, it would just go up the hierarchy and then down again until it finds a matching element)
- find the first child that is an instance of a specified class
- find all (direct or indirect) children of a specified class
*/
}
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