Android 9.0 与Android 8.1 中的点击Recent键清除按钮有些区别,之前Android 8.1 的全部清除按钮位于SystemUI中,而Android 9.0 的“全部清除”按钮位于Launcher3中; 估计是为了函数分离做的修改, 由于SystemUI中保留了大部分的代码,在调试时候,产生了部分误导的情况,直到调试发现了该问题点; Launcher3\quickstep\src\com\android\quickstep\views\RecentsView.java 其中函数为: private void removeTask(Task task, int index, PendingAnimation.OnEndListener onEndListener, boolean shouldLog) { if (task != null) { ActivityManagerWrapper.getInstance().removeTask(task.key.id); if (shouldLog) { mActivity.getUserEventDispatcher().logTaskLaunchOrDismiss( onEndListener.logAction, Direction.UP, index, TaskUtils.getLaunchComponentKeyForTask(task.key)); } if (task.key.getComponent() == null || TextUtils.isEmpty(task.key.getComponent().getPackageName())) { return; } stopApp(getContext(), task.key.getComponent().getPackageName()); } }
增加的清除对应PackageName 的函数方法为:
public boolean stopApp(Context context, String pkgname) { boolean flag = false; ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); try { Method forceStopPackage; forceStopPackage = am.getClass().getDeclaredMethod("forceStopPackage", String.class); // forceStopPackage.setAccessible(true); forceStopPackage.invoke(am, pkgname); flag = true; } catch (IllegalArgumentException e) { e.printStackTrace(); flag = false; } catch (IllegalAccessException e) { e.printStackTrace(); flag = false; } catch (InvocationTargetException e) { e.printStackTrace(); flag = false; } catch (SecurityException e) { e.printStackTrace(); flag = false; } catch (NoSuchMethodException e) { e.printStackTrace(); flag = false; } return flag; }
注意在AndroidManifest.xml中增加对应的权限:
<uses-permission android:name="android.permission.FORCE_STOP_PACKAGES" />