android onResume is called before you unlock the phone

最近遇到一个问题，android上运行app当锁定屏幕，然后解锁.

android 解锁屏幕之前会先调用onResume方法，有时候这并不是开发者想要的结果...比如声音在没解锁之前就播放用户体验效果就有点差了...

解决这个问题有两个方法，直接上代码了...

@Overridepublic void onWindowFocusChanged(boolean hasFocus) {if (hasFocus) {           // todo something;        }        super.onWindowFocusChanged(hasFocus);}

public class ExampleActivity extends Activity {   @Override    protected void onCreate() {        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);        filter.addAction(Intent.ACTION_SCREEN_OFF);        BroadcastReceiver mReceiver = new ScreenReceiver();        registerReceiver(mReceiver, filter);    }    @Override    protected void onPause() {        if (ScreenReceiver.wasScreenOn) {            System.out.println("onPause() called because screen turned off.");        } else {            System.out.println("normal onPause() call");        }        super.onPause();    }    @Override    protected void onResume() {        if (!ScreenReceiver.wasScreenOn) {            System.out.println("onResume() called when screen turns on");        } else {            System.out.println("normal onResume() call");        }        super.onResume();    }}

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