Question

我想知道当用户在android中锁定手机时屏幕关闭。我使用BroadCast接收器这样并注册但是我没有关闭屏幕

public class MyActivity extends Activity{   

    private static final String ACTION = "android.intent.action.ACTION_SCREEN_OFF";
    BroadcastReceiver myReceiver;
    Context context;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        context = this;
        final IntentFilter theFilter = new IntentFilter();
        theFilter.addAction(ACTION);

        context.registerReceiver(myReceiver, theFilter);
        System.out.println("inside increate");
        myReceiver = new BroadcastReceiver(){

            @Override
            public void onReceive(Context context, Intent intent) {
                // TODO Auto-generated method stub      
                    System.out.println("phone locked*****");                
            }

        };   

    }}

如何找出这个问题？

Answer 1

步骤1：删除private static final String ACTION行

步骤2：在Intent.ACTION_SCREEN_OFF行中使用addAction()（或者，更好的是，只需将其提供给IntentFilter构造函数并删除addAction()行）

第3步：使用android.util.Log代替System.out.println()

屏幕锁定和解锁

1 个答案: