recent移除task时，结束其所有进程和service（全Android版本）

目录

一、Launcher中forceStopPackage

Android9

Android13

二、AMS中判断前台service也杀死

Android6

Android7

Android11

Android原生系统在清理后台应用时，其实并不能清理所有进程。例如：

在点击系统自带的播放器以后，播放音乐的时候，在最近任务栏recents列表中，点击全部清除，发现音乐播放器还在播放音乐。

现提供两种解决方案

一、Launcher中forceStopPackage

Android9

vendor下面的launcher 里面
RecentsView.java
TaskActionController.javaremoveTask 方法里面
-         ActivityManagerWrapper.getInstance().removeTask(task.key.id);
+        final ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
+        String pkgName = task.key.getPackageName();
+        Log.d(TAG, "Stopping pkgName " + pkgName);
+        am.forceStopPackage(pkgName);

Android13

alps_mssi/frameworks/base/data/etc/com.android.launcher3.xml<permission name="android.permission.STOP_APP_SWITCHES"/>
+               <permission name="android.permission.FORCE_STOP_PACKAGES"/>alps_mssi/vendor/mediatek/proprietary/packages/apps/Launcher3/quickstep/AndroidManifest.xml
+    <uses-permission android:name="android.permission.FORCE_STOP_PACKAGES"/>alps_mssi/vendor/mediatek/proprietary/packages/apps/Launcher3/quickstep/src/com/android/quickstep/views/RecentsView.javaimport java.util.Objects;import java.util.function.Consumer;+import android.app.ActivityManager;
+import android.app.ActivityOptions;
+/*** A list of recent tasks.*/
@@ -3127,12 +3130,16 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_Tif (success) {if (shouldRemoveTask) {if (dismissedTaskView.getTask() != null) {
+                                                       //andy
+                                                       String pkgname = dismissedTaskView.getTask().key.getPackageName();
+                                                       Log.e("andy---RecentsView","pkgname="+pkgname);
+                                                       if (ENABLE_QUICKSTEP_LIVE_TILE.get()&& dismissedTaskView.isRunningTask()) {finishRecentsAnimation(true /* toRecents */, false /* shouldPip */,
-                                        () -> removeTaskInternal(dismissedTaskViewId));
+                                        () -> removeTaskInternal(dismissedTaskViewId,pkgname));} else {
-                                removeTaskInternal(dismissedTaskViewId);
+                                removeTaskInternal(dismissedTaskViewId,pkgname);}mActivity.getStatsLogManager().logger().withItemInfo(dismissedTaskView.getItemInfo())
@@ -3401,7 +3408,7 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_Treturn lastVisibleIndex;}-    private void removeTaskInternal(int dismissedTaskViewId) {
+    private void removeTaskInternal(int dismissedTaskViewId, String pkgname) {int[] taskIds = getTaskIdsForTaskViewId(dismissedTaskViewId);int primaryTaskId = taskIds[0];int secondaryTaskId = taskIds[1];
@@ -3411,6 +3418,10 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_Tif (secondaryTaskId != -1) {ActivityManagerWrapper.getInstance().removeTask(secondaryTaskId);}
+                                       //andy
+                                       ActivityManager am = (ActivityManager) mActivity.getSystemService(Context.ACTIVITY_SERVICE);
+                                       Log.e("andy---RecentsView---", "pkgname = " + pkgname);
+                                       am.forceStopPackage(pkgname);                                   },REMOVE_TASK_WAIT_FOR_APP_STOP_MS);}
@@ -3436,6 +3447,12 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_Tint count = getTaskViewCount();for (int i = 0; i < count; i++) {addDismissedTaskAnimations(requireTaskViewAt(i), duration, anim);
+                       //andy
+                       String pkgname = requireTaskViewAt(i).getTask().key.getPackageName();
+                       Log.e("andy---RecentsView---createAllTasksDismissAnimation---","pkgname="+pkgname);
+                       ActivityManager am = (ActivityManager) mActivity.getSystemService(Context.ACTIVITY_SERVICE);
+                       am.forceStopPackage(pkgname);                                   
+                       }mPendingAnimation = anim;

二、AMS中判断前台service也杀死

/frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java

Android6

在最近的任务界面，把正在播放的音乐关掉，播放的音乐没有停止@Overridepublic boolean removeTask(int taskId) {synchronized (this) {enforceCallingPermission(android.Manifest.permission.REMOVE_TASKS,"removeTask()");long ident = Binder.clearCallingIdentity();try {return removeTaskByIdLocked(taskId, true);} finally {Binder.restoreCallingIdentity(ident);}}}private boolean removeTaskByIdLocked(int taskId, boolean killProcess) {TaskRecord tr = mStackSupervisor.anyTaskForIdLocked(taskId, false);/// M: BMW. [ALPS01455940], remove task which not in recent task/// but we really want to remove. Add recent task will auto remove/// duplicate task record (the same task affinity) @{if (MultiWindowProxy.isSupported() && tr == null) {ArrayList<ActivityStack> stackList = mStackSupervisor.getStacks();for (int i = 0; i < stackList.size(); i++) {ActivityStack stack = stackList.get(i);TaskRecord task = stack.topTask();if (MultiWindowProxy.getInstance().isFloatingStack(stack.mStackId)&& task != null && task.taskId == taskId) {tr = task;}}}/// @}if (tr != null) {tr.removeTaskActivitiesLocked();cleanUpRemovedTaskLocked(tr, killProcess);if (tr.isPersistable) {notifyTaskPersisterLocked(null, true);}return true;}Slog.w(TAG, "Request to remove task ignored for non-existent task " + taskId);return false;}private void cleanUpRemovedTaskLocked(TaskRecord tr, boolean killProcess) {mRecentTasks.remove(tr);tr.removedFromRecents();ComponentName component = tr.getBaseIntent().getComponent();if (component == null) {Slog.w(TAG, "No component for base intent of task: " + tr);return;}// Find any running services associated with this app and stop if needed.mServices.cleanUpRemovedTaskLocked(tr, component, new Intent(tr.getBaseIntent()));if (!killProcess) {return;}// Determine if the process(es) for this task should be killed.final String pkg = component.getPackageName();ArrayList<ProcessRecord> procsToKill = new ArrayList<>();ArrayMap<String, SparseArray<ProcessRecord>> pmap = mProcessNames.getMap();for (int i = 0; i < pmap.size(); i++) {SparseArray<ProcessRecord> uids = pmap.valueAt(i);for (int j = 0; j < uids.size(); j++) {ProcessRecord proc = uids.valueAt(j);if (proc.userId != tr.userId) {// Don't kill process for a different user.continue;}if (proc == mHomeProcess) {// Don't kill the home process along with tasks from the same package.continue;}if (!proc.pkgList.containsKey(pkg)) {// Don't kill process that is not associated with this task.continue;}for (int k = 0; k < proc.activities.size(); k++) {TaskRecord otherTask = proc.activities.get(k).task;if (tr.taskId != otherTask.taskId && otherTask.inRecents) {// Don't kill process(es) that has an activity in a different task that is// also in recents.return;}}if (proc.foregroundServices) {// Don't kill process(es) with foreground service.return;}// Add process to kill list.procsToKill.add(proc);}}// Kill the running processes.for (int i = 0; i < procsToKill.size(); i++) {ProcessRecord pr = procsToKill.get(i);if (pr.setSchedGroup == Process.THREAD_GROUP_BG_NONINTERACTIVE&& pr.curReceiver == null) {pr.kill("remove task", true);} else {// We delay killing processes that are not in the background or running a receiver.pr.waitingToKill = "remove task";}}}可以看到，如果是foreground的service，就不会kill掉进程让service 不调用     public final void startForeground(int id, Notification notification);问题解决但如果不调用这个，service就是后台的，系统内存紧张时就会被杀掉，后续看看有没有别的解决办法～改framework？实在不行就这么干

Android7

    private void cleanUpRemovedTaskLocked(TaskRecord tr, boolean killProcess,boolean removeFromRecents) {if (removeFromRecents) {mRecentTasks.remove(tr);tr.removedFromRecents();}ComponentName component = tr.getBaseIntent().getComponent();if (component == null) {Slog.w(TAG, "No component for base intent of task: " + tr);return;}// Find any running services associated with this app and stop if needed.mServices.cleanUpRemovedTaskLocked(tr, component, new Intent(tr.getBaseIntent()));if (!killProcess) {return;}// Determine if the process(es) for this task should be killed.final String pkg = component.getPackageName();ArrayList<ProcessRecord> procsToKill = new ArrayList<>();ArrayMap<String, SparseArray<ProcessRecord>> pmap = mProcessNames.getMap();for (int i = 0; i < pmap.size(); i++) {SparseArray<ProcessRecord> uids = pmap.valueAt(i);for (int j = 0; j < uids.size(); j++) {ProcessRecord proc = uids.valueAt(j);if (proc.userId != tr.userId) {// Don't kill process for a different user.continue;}if (proc == mHomeProcess) {// Don't kill the home process along with tasks from the same package.continue;}if (!proc.pkgList.containsKey(pkg)) {// Don't kill process that is not associated with this task.continue;}for (int k = 0; k < proc.activities.size(); k++) {TaskRecord otherTask = proc.activities.get(k).task;if (tr.taskId != otherTask.taskId && otherTask.inRecents) {// Don't kill process(es) that has an activity in a different task that is// also in recents.return;}}-                if (proc.foregroundServices) {
-                    // Don't kill process(es) with foreground service.
-                    return;
-                }// Add process to kill list.procsToKill.add(proc);}}// Kill the running processes.for (int i = 0; i < procsToKill.size(); i++) {ProcessRecord pr = procsToKill.get(i);
-            if (pr.setSchedGroup == ProcessList.SCHED_GROUP_BACKGROUND
-                    && pr.curReceiver == null) {pr.kill("remove task", true);
-            } else {
-                // We delay killing processes that are not in the background or running a receiver.
-                pr.waitingToKill = "remove task";
-            }}}

Android11

packages/apps/Launcher3/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
frameworks/base/services/core/java/com/android/server/wm/ActivityStackSupervisor.java
frameworks/base/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.javavoid removeTask(Task task, boolean killProcess, boolean removeFromRecents, String reason) {if (task.mInRemoveTask) {// Prevent recursion.return;}task.mInRemoveTask = true;try {task.performClearTask(reason);cleanUpRemovedTaskLocked(task, killProcess, removeFromRecents);mService.getLockTaskController().clearLockedTask(task);mService.getTaskChangeNotificationController().notifyTaskStackChanged();if (task.isPersistable) {mService.notifyTaskPersisterLocked(null, true);}} finally {task.mInRemoveTask = false;}}void cleanUpRemovedTaskLocked(Task task, boolean killProcess, boolean removeFromRecents) {if (removeFromRecents) {mRecentTasks.remove(task);}ComponentName component = task.getBaseIntent().getComponent();if (component == null) {Slog.w(TAG, "No component for base intent of task: " + task);return;}// Find any running services associated with this app and stop if needed.final Message msg = PooledLambda.obtainMessage(ActivityManagerInternal::cleanUpServices,mService.mAmInternal, task.mUserId, component, new Intent(task.getBaseIntent()));mService.mH.sendMessage(msg);if (!killProcess) {return;}// Determine if the process(es) for this task should be killed.final String pkg = component.getPackageName();ArrayList<Object> procsToKill = new ArrayList<>();ArrayMap<String, SparseArray<WindowProcessController>> pmap =mService.mProcessNames.getMap();for (int i = 0; i < pmap.size(); i++) {SparseArray<WindowProcessController> uids = pmap.valueAt(i);for (int j = 0; j < uids.size(); j++) {WindowProcessController proc = uids.valueAt(j);if (proc.mUserId != task.mUserId) {// Don't kill process for a different user.continue;}if (proc == mService.mHomeProcess) {// Don't kill the home process along with tasks from the same package.continue;}if (!proc.mPkgList.contains(pkg)) {// Don't kill process that is not associated with this task.continue;}if (!proc.shouldKillProcessForRemovedTask(task)) {// Don't kill process(es) that has an activity in a different task that is also// in recents, or has an activity not stopped.return;}// core modify start/*if (proc.hasForegroundServices()) {// Don't kill process(es) with foreground service.return;}*/// core modify end// Add process to kill list.procsToKill.add(proc);}}// Kill the running processes. Post on handle since we don't want to hold the service lock// while calling into AM.final Message m = PooledLambda.obtainMessage(ActivityManagerInternal::killProcessesForRemovedTask, mService.mAmInternal,procsToKill);mService.mH.sendMessage(m);}public void killProcessesForRemovedTask(ArrayList<Object> procsToKill) {synchronized (ActivityManagerService.this) {for (int i = 0; i < procsToKill.size(); i++) {final WindowProcessController wpc =(WindowProcessController) procsToKill.get(i);final ProcessRecord pr = (ProcessRecord) wpc.mOwner;// core modify start/*if (pr.setSchedGroup == ProcessList.SCHED_GROUP_BACKGROUND&& pr.curReceivers.isEmpty()) {*/pr.kill("remove task", ApplicationExitInfo.REASON_USER_REQUESTED,ApplicationExitInfo.SUBREASON_UNKNOWN, true);/* } else {// We delay killing processes that are not in the background or running a// receiver.pr.waitingToKill = "remove task";}*/
// core modify end}}}

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