第一步: 首先添加权限:
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
第二步:代码实现如下:
public class ScreenActivity extends Activity {
PowerManager powerManager = null;
WakeLock wakeLock = null; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.main);
powerManager = (PowerManager)this.getSystemService(this.POWER_SERVICE);
wakeLock = this.powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Lock");
} @Override
protected void onResume() {
super.onResume();
wakeLock.acquire();
} @Override
protected void onPause() {
super.onPause();
wakeLock.release();
} }
最后说明:在不同的生命周期调用WakeLock函数可以使系统正常运行(如果Activity结束没有调用WakeLock.release,则屏幕会一直常亮)。