12_唤醒锁

AndroidManifest.xml 中 加权限  <uses-permission android:name="android.permission.WAKE_LOCK"/>

import android.os.Bundle;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;

public class MainActivity extends Activity {
 
 WakeLock wakeLock;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  
  //初始化
  PowerManager powerManager = (PowerManager)this.getSystemService(Context.POWER_SERVICE);
   wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK,"My Lock");
  
  setContentView(R.layout.activity_main);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }
 
 
  @Override
     protected void onResume() {
         super.onResume();
         //获取
         wakeLock.acquire();
     }

     @Override
     protected void onPause() {
         super.onPause();
       //释放
         wakeLock.release();
     }

 
}