Android通过广播实现灭屏和唤醒

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1、要实现灭屏和唤醒，需要在Manifest文件添加如下权限：

    <!-- 屏幕唤醒 -->    <uses-permission android:name="android.permission.WAKE_LOCK" />    <!-- 屏幕熄灭 -->    <user-permission android:name="android.permission.DEVICE_POWER" />

2、以下是封装的一个工具类，实现屏幕唤醒和熄灭

package testWakeAndLock;import android.content.Context;import android.os.PowerManager;import android.os.SystemClock;import com.example.testshellcmd.SharedApplication;public class WakeAndLock {Context context;PowerManager pm;PowerManager.WakeLock wakeLock;public WakeAndLock() {context = SharedApplication.context;pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);wakeLock = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP| PowerManager.SCREEN_DIM_WAKE_LOCK, "WakeAndLock");}/** * 唤醒屏幕 */public void screenOn() {wakeLock.acquire();android.util.Log.i("cxq", "screenOn");}/** * 熄灭屏幕 */public void screenOff() {pm.goToSleep(SystemClock.uptimeMillis());android.util.Log.i("cxq", "screenOff");}}

3、自定义广播，用于控制屏幕的唤醒和熄灭，这样做的好处是可以在其他APP中也实现屏幕的控制

package testWakeAndLock;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class ScreenControlBroadcast extends BroadcastReceiver {private String op = "on";@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubandroid.util.Log.i("cxq", "ScreenControlBroadcast");op = intent.getStringExtra("screen");WakeAndLock wakeAndLock = new WakeAndLock();if (op.equals("off")) {wakeAndLock.screenOff();} else {wakeAndLock.screenOn();}}}

4、在Manifest文件中注册广播

 <receiver android:name="testWakeAndLock.ScreenControlBroadcast" >            <intent-filter>                <action android:name="testWakeAndLock.ScreenControlBroadcast" />            </intent-filter>  </receiver>

5、怎么在其他APP中调用？

其实有很多中方式，但是本文介绍一种方便快捷的方法，直接通过adb命令调用格式如下：

亮屏

am broadcast -a testWakeAndLock.ScreenControlBroadcast --es screen on

灭屏

am broadcast -a testWakeAndLock.ScreenControlBroadcast --es screen off

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