利用反射读取应用缓存：
1、缓存数据最为准确，但是清理可能无法进行
首先添加aidl
image.png
进行关联
protected void getPackageCache(String packagename) {
IPackageStatsObserver.Stub MyObserver = new IPackageStatsObserver.Stub() {
public void onGetStatsCompleted(PackageStats stats, boolean succeeded) {
// TODO Auto-generated method stub
long cacheSize = stats.cacheSize;
cookie = Formatter.formatFileSize(getApplicationContext(), cacheSize);
// Log.i("text",cookie);
runOnUiThread(new Runnable() {
@Override
public void run() {
tvCookie.setText(cookie);
}
});
}
};
try {
Class<?> clazz = Class.forName("android.content.pm.PackageManager");//反射
Method method = clazz.getMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);
method.invoke(pm, packagename, MyObserver);
} catch (Exception e) {
e.printStackTrace();
}
}
2、自定义清理工具（缓存大小可能不大准确）
public class DataClearUtil {
/**
* 清除内部缓存
* @param context
*/
public static void cleanInternalCache(Context context) {
deleteFileByDirectory(context.getCacheDir());
}
/**
* 清除外部缓存
* @param context
*/
public static void cleanExternalCache(Context context) {
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
deleteFileByDirectory(context.getExternalCacheDir());
}
}
/**
* 清除数据库缓存
* @param context
*/
public static void cleanDatabase(Context context) {
deleteFileByDirectory(new File("/data/data/"+context.getPackageName()+"/databases"));
}
/**
* 清除SharedPreference缓存
* @param context
*/
public static void cleanSharedPreference(Context context) {
deleteFileByDirectory(new File("/data/data/"+context.getPackageName()+"/shared_prefs"));
}
/**
* 清除自定义路径下缓存
* @param filepath
*/
public static void cleanCustomCache(String filepath) {
deleteFileByDirectory(new File(filepath));
}
/**
* 清除files文件夹下缓存
* @param context
*/
public static void cleanFiles(Context context) {
deleteFileByDirectory(context.getFilesDir());
}
/**
* 删除指定名称数据库
* @param context
* @param databaseName
*/
public static void cleanDatabaseByName(Context context, String databaseName) {
context.deleteDatabase(databaseName);
}
/**
* 清除App内所有数据
* @param context
* @param filePaths
*/
public static void cleanApplicationData(Context context, String... filePaths) {
cleanInternalCache(context);
cleanExternalCache(context);
cleanDatabase(context);
cleanSharedPreference(context);
cleanFiles(context);
if (filePaths != null) {
for (String filePath : filePaths) {
cleanCustomCache(filePath);
}
}
}
/**
* 删除指定目录下所有文件,不处理文件夹
* @param cacheDir
*/
private static void deleteFileByDirectory(File cacheDir) {
/*if (cacheDir != null && cacheDir.exists() && cacheDir.isDirectory()) {
for (File file : cacheDir.listFiles()) {
file.delete();
}
}*/
if (cacheDir == null || !cacheDir.exists()) {
return;
}
if (cacheDir.isDirectory()) {
File[] files = cacheDir.listFiles();
for (File file : files) {
if (file.isDirectory()) {
deleteFileByDirectory(file);
} else {
file.delete();
}
}
}
cacheDir.delete();
}
/**
* 获取Cache总大小
* @param context
* @return
*/
public static String getTotalCacheSize(Context context) {
long folderSize = getFolderSize(context.getCacheDir());
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
folderSize += getFolderSize(context.getExternalCacheDir());
}
return getFormatSize(folderSize);
}
/**
* 清除所有缓存
*/
public static void cleanAllCache(Context context) {
deleteDir(context.getCacheDir());
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
deleteDir(context.getExternalCacheDir());
}
}
/**
* 删除指定目录下所有文件及文件夹
* @param dir
* @return
*/
public static boolean deleteDir(File dir) {
if (dir == null && !dir.exists()) {
return false;
}
if (dir.isDirectory()) {
for (File file : dir.listFiles()) {
boolean isSuccess = deleteDir(file);
if (!isSuccess) {
return false;
}
}
}
return dir.delete();
}
/**
* 获取文件夹大小
* @param file
* @return
*/
public static long getFolderSize(File file) {
long size = 0;
try {
File[] fileList = file.listFiles();
for (int i = 0; i < fileList.length; i++) {
if (fileList[i].isDirectory()) {
size += getFolderSize(fileList[i]);
} else {
size += fileList[i].length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}
/**
* 获取格式化后文件大小
* @param size
* @return
*/
public static String getFormatSize(double size) {
double kiloByte = size/1024;
if (kiloByte < 1) {
return size+"B";
}
double megaByte = kiloByte/1024;
if (megaByte < 1) {
BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+"KB";
}
double gigaByte = megaByte/1024;
if (gigaByte < 1) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+"MB";
}
double teraByte = gigaByte/1024;
if (teraByte < 1) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+"GB";
}
BigDecimal result4 = new BigDecimal(Double.toString(teraByte));
return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+"TB";
}
}
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