目的：

　　解决屏幕唤醒问题

遇到的问题：

　　调用wake.release后，程序退出及其它程序都保持唤醒状态，无法恢复到系统自由控制唤醒。

解决办法：

　　调用wake.release后，将wake == null;

 

贴代码:

1 package com.example.boke; 2  3 import android.app.Activity; 4 import android.content.Context; 5 import android.os.PowerManager; 6 import android.os.PowerManager.WakeLock; 7  8 public class BaseActivity extends Activity { 9 10     /**11      * 系统电量管理对象12      */13     protected PowerManager powerManager = null;14     /***15      * 唤醒操作管理对象16      */17     protected WakeLock wakeLock = null;18     /**19      * 是否使用唤醒，标志位20      */21     private boolean isWakeUp = false;// 屏幕是否常亮22 23     /**24      * 是否启动界面长亮25      * @param bEnable26      */27     public void enableWackUpActivity(boolean bEnable) {28         if (bEnable) {29             isWakeUp = true;30             openWakeUp();31         } else {32             isWakeUp = false;33             closeWakeUp();34         }35     }36 37     /**38      * 打开界面长亮功能39      */40     private void openWakeUp() {41         if (this.powerManager == null) {42             this.powerManager = (PowerManager) this43                     .getSystemService(Context.POWER_SERVICE);44         }45         if (this.wakeLock == null) {46             this.wakeLock = this.powerManager.newWakeLock(47                     PowerManager.FULL_WAKE_LOCK, "TNT");48         }49         if (!this.wakeLock.isHeld()) {50             this.wakeLock.acquire();51         }52     }53 54     /**55      * 关闭界面长亮功能56      */57     private void closeWakeUp() {58         if (this.wakeLock != null) {59             if (this.wakeLock.isHeld()) {60                 this.wakeLock.release();61                 this.wakeLock = null;62             }63         }64     }65 66     @Override67     protected void onPause() {68         // TODO Auto-generated method stub69         super.onPause();70         if (isWakeUp) {71             closeWakeUp();72         }73     }74 75     @Override76     protected void onResume() {77         // TODO Auto-generated method stub78         super.onResume();79         if (isWakeUp) {80             openWakeUp();81         }82     }83 84 }