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如何检查从后台服务的Andr​​oid应用程序在顶

分类: 技术问答 • 2022-06-05 22:38:08
问题描述：

在我的应用程序，我要检查whethere任何其他应用程序启动或无法从我的app.So我目前usimg Activitymanager找到像这样在顶

In my app i want to check whethere any other app launches or not from my app.So i am currently usimg Activitymanager to find the top activity like this 

ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1);
Log.d("topActivity", "CURRENT Activity ::"
         + taskInfo.get(0).topActivity.getClassName());
ComponentName componentInfo = taskInfo.get(0).topActivity;
componentInfo.getPackageName();

但我想运行此code在后台service.So，我可以检测到其他应用程序通过this.So启动有什么主意，做this.Plz帮助me.thanks

But i want to run this code in background service.So that i can detect When other app launches through this.So is there any idea to do this.Plz help me.thanks

答

通过使用服务，您可以做到这一点。

By using service you can achieve this..

public void checkActivity() {
    handler = new Handler();
    activityRunnable = new ActivityRunnable();
    handler.postDelayed(activityRunnable, 500);
}

private class ActivityRunnable implements Runnable {
    @Override
    public void run() {
        ActivityManager manager = (ActivityManager) getApplicationContext()
                .getSystemService(Context.ACTIVITY_SERVICE);
        List<RunningTaskInfo> runningTasks = manager.getRunningTasks(1);
        if (runningTasks != null && runningTasks.size() > 0) {
            ComponentName topActivity = runningTasks.get(0).topActivity;
            // Here you can get the TopActivity for every 500ms
            if(!topActivity.getPackageName().equals(getPackageName())){
                // Other Application is opened
            }
            handler.postDelayed(this, 500);
        }
    }
}

致电 checkActivity（）在服务键，不要对的onCreate忘记删除 handler.removeCallbacks（activityRunnable）; 在的onDestroy

Call the checkActivity() in onCreate of service and dont forgot to remove the handler.removeCallbacks(activityRunnable); callbacks in onDestroy

开始LauncherActivity服务的onCreate 和停止LauncherActivity服务的onDestroy

start the service in LauncherActivity onCreate and stop the service in LauncherActivity onDestroy

注意：不要忘了添加的权限在你的清单

Note: Dont forgot to add the permission in your manifest

<uses-permission android:name="android.permission.GET_TASKS" />

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