1.Android Q Service启动流程梳理——bindService
跟读一下源码大致流程如下：
image.png
1.ContextImpl
--- base/core/java/android/app/ContextImpl.java
+++ base/core/java/android/app/ContextImpl.java
@Override
public boolean bindService(Intent service, ServiceConnection conn, int flags) {
warnIfCallingFromSystemProcess();
return bindServiceCommon(service, conn, flags, null, mMainThread.getHandler(), null,
getUser());
}
....
private boolean bindServiceCommon(Intent service, ServiceConnection conn, int flags,
String instanceName, Handler handler, Executor executor, UserHandle user) {
// Keep this in sync with DevicePolicyManager.bindDeviceAdminServiceAsUser.
IServiceConnection sd;
if (conn == null) {
throw new IllegalArgumentException("connection is null");
}
if (handler != null && executor != null) {
throw new IllegalArgumentException("Handler and Executor both supplied");
}
if (mPackageInfo != null) {
if (executor != null) {
sd = mPackageInfo.getServiceDispatcher(conn, getOuterContext(), executor, flags);
} else {
sd = mPackageInfo.getServiceDispatcher(conn, getOuterContext(), handler, flags);
}
} else {
throw new RuntimeException("Not supported in system context");
}
validateServiceIntent(service);
Slog.e(TAG, "validateServiceIntent service="+service);
try {
IBinder token = getActivityToken();
if (token == null && (flags&BIND_AUTO_CREATE) == 0 && mPackageInfo != null
&& mPackageInfo.getApplicationInfo().targetSdkVersion
< android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
flags |= BIND_WAIVE_PRIORITY;
}
service.prepareToLeaveProcess(this);
Slog.e(TAG, "prepareToLeaveProcess");
int res = ActivityManager.getService().bindIsolatedService(
mMainThread.getApplicationThread(), getActivityToken(), service,
service.resolveTypeIfNeeded(getContentResolver()),
sd, flags, instanceName, getOpPackageName(), user.getIdentifier());
Slog.e(TAG, "bindIsolatedService res="+res);
if (res < 0) {
throw new SecurityException(
"Not allowed to bind to service " + service);
}
return res != 0;
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
下面会调用到AMS，在此之前看下LoadedApk这段初始化IServiceConnection的内部实现。
Index: base/core/java/android/app/LoadedApk.java
===================================================================
@UnsupportedAppUsage
public final IServiceConnection getServiceDispatcher(ServiceConnection c,
Context context, Handler handler, int flags) {
return getServiceDispatcherCommon(c, context, handler, null, flags);
}
private IServiceConnection getServiceDispatcherCommon(ServiceConnection c,
Context context, Handler handler, Executor executor, int flags) {
synchronized (mServices) {
LoadedApk.ServiceDispatcher sd = null;
ArrayMap<ServiceConnection, LoadedApk.ServiceDispatcher> map = mServices.get(context);
if (map != null) {
if (DEBUG) Slog.d(TAG, "Returning existing dispatcher " + sd + " for conn " + c);
sd = map.get(c);
}
if (sd == null) {
if (executor != null) {
sd = new ServiceDispatcher(c, context, executor, flags);
} else {
sd = new ServiceDispatcher(c, context, handler, flags);
}
if (DEBUG) Slog.d(TAG, "Creating new dispatcher " + sd + " for conn " + c);
if (map == null) {
map = new ArrayMap<>();
mServices.put(context, map);
}
map.put(c, sd);
} else {
sd.validate(context, handler, executor);
}
return sd.getIServiceConnection();
}
}
......
static final class ServiceDispatcher {
private final ServiceDispatcher.InnerConnection mIServiceConnection;
@UnsupportedAppUsage
private final ServiceConnection mConnection;
@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
private final Context mContext;
private final Handler mActivityThread;
private final Executor mActivityExecutor;
private final ServiceConnectionLeaked mLocation;
private final int mFlags;
private RuntimeException mUnbindLocation;
private boolean mForgotten;
private static class ConnectionInfo {
IBinder binder;
IBinder.DeathRecipient deathMonitor;
}
private static class InnerConnection extends IServiceConnection.Stub {
@UnsupportedAppUsage
final WeakReference<LoadedApk.ServiceDispatcher> mDispatcher;
InnerConnection(LoadedApk.ServiceDispatcher sd) {
mDispatcher = new WeakReference<LoadedApk.ServiceDispatcher>(sd);
}
public void connected(ComponentName name, IBinder service, boolean dead)
throws RemoteException {
LoadedApk.ServiceDispatcher sd = mDispatcher.get();
if (sd != null) {
sd.connected(name, service, dead);
}
}
}
private final ArrayMap<ComponentName, ServiceDispatcher.ConnectionInfo> mActiveConnections
= new ArrayMap<ComponentName, ServiceDispatcher.ConnectionInfo>();
@UnsupportedAppUsage
ServiceDispatcher(ServiceConnection conn,
Context context, Handler activityThread, int flags) {
mIServiceConnection = new InnerConnection(this);
mConnection = conn;
mContext = context;
mActivityThread = activityThread;
mActivityExecutor = null;
mLocation = new ServiceConnectionLeaked(null);
mLocation.fillInStackTrace();
mFlags = flags;
}
ServiceDispatcher(ServiceConnection conn,
Context context, Executor activityExecutor, int flags) {
mIServiceConnection = new InnerConnection(this);
mConnection = conn;
mContext = context;
mActivityThread = null;
mActivityExecutor = activityExecutor;
mLocation = new ServiceConnectionLeaked(null);
mLocation.fillInStackTrace();
mFlags = flags;
}
void validate(Context context, Handler activityThread, Executor activityExecutor) {
if (mContext != context) {
throw new RuntimeException(
"ServiceConnection " + mConnection +
" registered with differing Context (was " +
mContext + " now " + context + ")");
}
if (mActivityThread != activityThread) {
throw new RuntimeException(
"ServiceConnection " + mConnection +
" registered with differing handler (was " +
mActivityThread + " now " + activityThread + ")");
}
if (mActivityExecutor != activityExecutor) {
throw new RuntimeException(
"ServiceConnection " + mConnection +
" registered with differing executor (was " +
mActivityExecutor + " now " + activityExecutor + ")");
}
}
void doForget() {
synchronized(this) {
for (int i=0; i<mActiveConnections.size(); i++) {
ServiceDispatcher.ConnectionInfo ci = mActiveConnections.valueAt(i);
ci.binder.unlinkToDeath(ci.deathMonitor, 0);
}
mActiveConnections.clear();
mForgotten = true;
}
}
ServiceConnectionLeaked getLocation() {
return mLocation;
}
ServiceConnection getServiceConnection() {
return mConnection;
}
@UnsupportedAppUsage
IServiceConnection getIServiceConnection() {
return mIServiceConnection;
}
int getFlags() {
return mFlags;
}
void setUnbindLocation(RuntimeException ex) {
mUnbindLocation = ex;
}
RuntimeException getUnbindLocation() {
return mUnbindLocation;
}
public void connected(ComponentName name, IBinder service, boolean dead) {
Log.e(TAG,"connected name "+name+",service="+service +"dead="+dead+",mActivityExecutor = " +(mActivityExecutor != null) );
if (mActivityExecutor != null) {
mActivityExecutor.execute(new RunConnection(name, service, 0, dead));
} else if (mActivityThread != null) {
mActivityThread.post(new RunConnection(name, service, 0, dead));
} else {
doConnected(name, service, dead);
}
}
public void death(ComponentName name, IBinder service) {
if (mActivityExecutor != null) {
mActivityExecutor.execute(new RunConnection(name, service, 1, false));
} else if (mActivityThread != null) {
mActivityThread.post(new RunConnection(name, service, 1, false));
} else {
doDeath(name, service);
}
}
public void doConnected(ComponentName name, IBinder service, boolean dead) {
ServiceDispatcher.ConnectionInfo old;
ServiceDispatcher.ConnectionInfo info;
Log.e(TAG,"doConnected ");
synchronized (this) {
if (mForgotten) {
// We unbound before receiving the connection; ignore
// any connection received.
return;
}
old = mActiveConnections.get(name);
if (old != null && old.binder == service) {
// Huh, already have this one. Oh well!
return;
}
if (service != null) {
// A new service is being connected... set it all up.
info = new ConnectionInfo();
info.binder = service;
info.deathMonitor = new DeathMonitor(name, service);
try {
service.linkToDeath(info.deathMonitor, 0);
mActiveConnections.put(name, info);
} catch (RemoteException e) {
// This service was dead before we got it... just
// don't do anything with it.
mActiveConnections.remove(name);
return;
}
} else {
// The named service is being disconnected... clean up.
mActiveConnections.remove(name);
}
if (old != null) {
old.binder.unlinkToDeath(old.deathMonitor, 0);
}
}
// If there was an old service, it is now disconnected.
if (old != null) {
mConnection.onServiceDisconnected(name);
}
if (dead) {
mConnection.onBindingDied(name);
}
// If there is a new viable service, it is now connected.
Log.e(TAG,"service!=null "+(service != null));
if (service != null) {
mConnection.onServiceConnected(name, service);
} else {
// The binding machinery worked, but the remote returned null from onBind().
mConnection.onNullBinding(name);
}
}
public void doDeath(ComponentName name, IBinder service) {
synchronized (this) {
ConnectionInfo old = mActiveConnections.get(name);
if (old == null || old.binder != service) {
// Death for someone different than who we last
// reported... just ignore it.
return;
}
mActiveConnections.remove(name);
old.binder.unlinkToDeath(old.deathMonitor, 0);
}
mConnection.onServiceDisconnected(name);
}
private final class RunConnection implements Runnable {
RunConnection(ComponentName name, IBinder service, int command, boolean dead) {
mName = name;
mService = service;
mCommand = command;
mDead = dead;
}
public void run() {
if (mCommand == 0) {
doConnected(mName, mService, mDead);
} else if (mCommand == 1) {
doDeath(mName, mService);
}
}
final ComponentName mName;
final IBinder mService;
final int mCommand;
final boolean mDead;
}
private final class DeathMonitor implements IBinder.DeathRecipient
{
DeathMonitor(ComponentName name, IBinder service) {
mName = name;
mService = service;
}
public void binderDied() {
death(mName, mService);
}
final ComponentName mName;
final IBinder mService;
}
}
ActivityManagerService ，bindserver失败的原因就是这里 在这里会BackgroundManager.skipService(service)为true的时候会返回0，不在往下执行。
public int bindIsolatedService(IApplicationThread caller, IBinder token, Intent service,
String resolvedType, IServiceConnection connection, int flags, String instanceName,
String callingPackage, int userId) throws TransactionTooLargeException {
enforceNotIsolatedCaller("bindService");
Slog.e(TAG, "bindIsolatedService enforceNotIsolatedCaller bindService");
// Refuse possible leaked file descriptors
if (service != null && service.hasFileDescriptors() == true) {
throw new IllegalArgumentException("File descriptors passed in Intent");
}
if (callingPackage == null) {
throw new IllegalArgumentException("callingPackage cannot be null");
}
// Ensure that instanceName, which is caller provided, does not contain
// unusual characters.
if (instanceName != null) {
for (int i = 0; i < instanceName.length(); ++i) {
char c = instanceName.charAt(i);
if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9') || c == '_' || c == '.')) {
throw new IllegalArgumentException("Illegal instanceName");
}
}
}
Slog.e(TAG, "bindIsolatedService skipService=" + BackgroundManager.skipService(service));
if (BackgroundManager.skipService(service)) return 0;
synchronized(this) {
return mServices.bindServiceLocked(caller, token, service,
resolvedType, connection, flags, instanceName, callingPackage, userId);
}
}
下面是一些添加和打印一些日志
Index: base/core/java/android/app/ActivityThread.java
===================================================================
--- base/core/java/android/app/ActivityThread.java (revision 16364)
+++ base/core/java/android/app/ActivityThread.java (working copy)
@@ -227,7 +227,7 @@
private static final boolean DEBUG_RESULTS = false;
private static final boolean DEBUG_BACKUP = false;
public static final boolean DEBUG_CONFIGURATION = false;
- private static final boolean DEBUG_SERVICE = false;
+ private static final boolean DEBUG_SERVICE = true;
public static final boolean DEBUG_MEMORY_TRIM = false;
private static final boolean DEBUG_PROVIDER = false;
public static final boolean DEBUG_ORDER = false;
Index: base/core/java/android/aw/BackgroundManager.java
===================================================================
--- base/core/java/android/aw/BackgroundManager.java (revision 16364)
+++ base/core/java/android/aw/BackgroundManager.java (working copy)
@@ -125,6 +125,7 @@
*/
public static boolean skipService(Intent service) {
IBackgroundManager bm = getService();
+ Log.w(TAG, "bm " +(bm ==null)+",service="+service);
if (bm == null) return false;
try {
return bm.skipService(service);
Index: base/services/core/java/com/android/server/am/ActivityManagerDebugConfig.java
===================================================================
--- base/services/core/java/com/android/server/am/ActivityManagerDebugConfig.java (revision 16364)
+++ base/services/core/java/com/android/server/am/ActivityManagerDebugConfig.java (working copy)
@@ -28,7 +28,7 @@
// to figure-out the origin of a log message while debugging the activity manager a little
// painful. By setting this constant to true, log messages from the activity manager package
// will be tagged with their class names instead fot the generic tag.
- static final boolean TAG_WITH_CLASS_NAME = false;
+ static final boolean TAG_WITH_CLASS_NAME = true;
// While debugging it is sometimes useful to have the category name of the log appended to the
// base log tag to make sifting through logs with the same base tag easier. By setting this
@@ -39,7 +39,7 @@
static final String TAG_AM = "ActivityManager";
// Enable all debug log categories.
- static final boolean DEBUG_ALL = false;
+ static final boolean DEBUG_ALL = true;
// Available log categories in the activity manager package.
static final boolean DEBUG_ANR = false;
Index: base/services/core/java/com/android/server/am/ActivityManagerService.java
===================================================================
--- base/services/core/java/com/android/server/am/ActivityManagerService.java (revision 16364)
+++ base/services/core/java/com/android/server/am/ActivityManagerService.java (working copy)
@@ -14108,6 +14108,7 @@
String callingPackage, int userId) throws TransactionTooLargeException {
enforceNotIsolatedCaller("bindService");
+ Slog.e(TAG, "bindIsolatedService enforceNotIsolatedCaller bindService");
// Refuse possible leaked file descriptors
if (service != null && service.hasFileDescriptors() == true) {
throw new IllegalArgumentException("File descriptors passed in Intent");
@@ -14129,8 +14130,9 @@
}
}
- if (BackgroundManager.skipService(service)) return 0;
synchronized(this) {
+ Slog.e(TAG, "bindIsolatedService skipService=" + BackgroundManager.skipService(service));
+ if (BackgroundManager.skipService(service)) return 0;
return mServices.bindServiceLocked(caller, token, service,
resolvedType, connection, flags, instanceName, callingPackage, userId);
}
方式1：关闭后台管理限制
android\device\softwinner\common\pad.mk
# background manager
#PRODUCT_PACKAGES += awbms.jar AwManager
方式2：关闭 skipService awbms_config
android\device\softwinner\common\config\awbms_config
skipService: false
方式3：根据对应的action来添加白名单
android\device\softwinner\common\config\awbms_config
action:
android.service.wallpaper.WallpaperService
com.android.cts.verifier.camera.its.START
com.softwinner.c2dm.intent.REGISTER
kr.hwangti.batterylog.BatteryLogService
com.system.ftools.util.FoSvc
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