android.permission.REMOVE_TASKS：权限被拒绝

Question

我想删除最近的任务列表。通过谷歌搜索，我从 Whosebug 中找到了一些 links。但其中 none 已得到正确回答。只有一个 link

Android, how to clear the recent task list which could get from Home button in most phone? Reflection is a possible way?

已经展示了一种使用反射的方法。但是现在，我面临一个问题，android.permission.REMOVE_TASKS被拒绝了。给出下面的代码，你可以看到在try-catch子句中，当权限被拒绝时，代码移动到catch()子句。

enter code here

private ActivityManager mActivityManager = null; 私有方法 mRemoveTask;

public MyActivityManager(Context context) {
    try {
         Class<?> activityManagerClass =         Class.forName("android.app.ActivityManager");
        mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

        mRemoveTask = activityManagerClass.getMethod("removeTask", new Class[] { int.class, int.class });
        mRemoveTask.setAccessible(true);

    }
    catch ( ClassNotFoundException e ) {
        Log.i("MyActivityManager", "No Such Class Found Exception", e);
    }
    catch ( Exception e ) {
        Log.i("MyActivityManager", "General Exception occurred", e);
    }
}

/**
 * If set, the process of the root activity of the task will be killed
 * as part of removing the task.
 */
public static final int REMOVE_TASK_KILL_PROCESS = 0x0001;

/**
 * Completely remove the given task.
 *
 * @param taskId Identifier of the task to be removed.
 * @param flags Additional operational flags.  May be 0 or
 * {@link #REMOVE_TASK_KILL_PROCESS}.
 * @return Returns true if the given task was found and removed.
 */
public boolean removeTask(int taskId, int flags) {
    try {
        return (Boolean) mRemoveTask.invoke(mActivityManager, Integer.valueOf(taskId), Integer.valueOf(flags) );
    } catch (Exception ex) {
        Log.i("MyActivityManager", "Task removal failed", ex);
    }
    return false;
}

public void clearRecentTasks() {
    List<RecentTaskInfo> recents = mActivityManager.getRecentTasks(1000, ActivityManager.RECENT_IGNORE_UNAVAILABLE);
    // Start from 1, since we don't want to kill ourselves!
    for( int i=1; i < recents.size(); i++ ) {
        removeTask( recents.get(i).persistentId, 0);
    }
}

}`

这里需要说明的是，这三个权限我都用过android.permission.GET_TASKS、android.permission.REORDER_TASKS、android.permission.REMOVE_TASKS 一些消息来源说要终止后台进程，但这不会删除最近的应用程序列表。所以我需要一些建议。

Answer 1

android.permission.REMOVE_TASKS is denied

该权限是 signature 级权限。只有当您的应用使用与设备固件相同的签名密钥签名时，您才能使用它。

android.permission.REMOVE_TASKS：权限被拒绝

android.permission.REMOVE_TASKS : Permission denied

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