Android通过广播实现灭屏和唤醒

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";

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
android.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