Question

我想检查设备空闲状态几分钟。我特别活动时能够得到。如下所示

 public class MainActivity extends AppCompatActivity {

    Handler handler;
    Runnable r;
    private ContentResolver contentResolver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);




        handler = new Handler();
        r = new Runnable() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                Toast.makeText(MainActivity.this, "user is inactive from last 10 seconds", Toast.LENGTH_SHORT).show();
            }
        };
        startHandler();


    }

    @Override
    public void onUserInteraction() {
        // TODO Auto-generated method stub
        super.onUserInteraction();
        stopHandler();//stop first and then start
        startHandler();
    }

    public void stopHandler() {
        handler.removeCallbacks(r);
    }

    public void startHandler() {
        handler.postDelayed(r,  10000); //for 10 seconds
    }


}

但是我想检查整个应用程序的设备空闲状态。在应用程序类中检查没有方法 onUserInteraction（） 还有其他任何技巧吗？

Answer 1

我认为您应该创建一个BaseActivity，它将扩展AppCompatActivity并将您的代码放在BaseActivity中，并在AppCompatActivity的所有活动中替换它。我希望它会对你有所帮助。

Answer 2

在应用程序类中创建3个方法，并在该方法中重置activityVisible变量的值

public static boolean activityVisible; // Variable that will check the current activity state       

public static boolean isActivityVisible() {
        return activityVisible; // return true or false
    }

public static void activityResumed() {
        activityVisible = true;// this will set true when activity resumed

    }

public static void activityPaused() {
        activityVisible = false;// this will set false when activity paused

}

您可以按照以下方式调用这些方法

AppClass.activityResumed();// On Resume notify the Application
AppClass.activityPaused();// On Pause notify the Application

当活动可见时执行操作

boolean isVisible = AppClass.isActivityVisible();

如何在Application类中检查设备空闲几分钟？

2 个答案: