Android点亮屏幕和解锁完整示例

MainActivity如下:

package cc.test.testwakelock;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
/**
 * Demo描述:
 * 点亮屏幕和解开键盘锁完整示例
 * 
 * 注意权限:
 * <uses-permission android:name="android.permission.WAKE_LOCK"/>
 * <uses-permission android:name="android.permission.DEVICE_POWER"/>
 * <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
 * 
 * 测试方法:
 * 程序运行后,里面按下电源键即可.
 * 
 * 参考资料:
 * 1 http://code.eoe.cn/399/title/%E4%BD%BF%E7%94%A8WakeLock%E4%BD%BFAndroid%E5%BA%94%E7%94%A8%E7%A8%8B%E5%BA%8F%E4%BF%9D%E6%8C%81%E5%90%8E%E5%8F%B0%E5%94%A4%E9%86%92
 * 2 http://bbs.csdn.net/topics/360073862
 * 3 http://www.cnblogs.com/keyindex/articles/1819504.html
 * 4 http://www.cnblogs.com/stoic/archive/2011/11/01/2785220.html
 *   Thank you very much
 */
public class MainActivity extends Activity {
	private Context mContext;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();

	}
	
	private void init() {
		mContext = this;
		for (int i = 0; i < 20000; i++) {
			for (int j = 0; j < 20000; j++) {
				if (i == 19999 && j == 19999) {
					Intent intent = new Intent(mContext,ScreenAndLockService.class);
					startService(intent);
				}
			}
		}
	}
	
	//终止服务
	@Override
	public void onBackPressed() {
		super.onBackPressed();
		Intent intent = new Intent(mContext,ScreenAndLockService.class);
		stopService(intent);
	}
	
	//终止服务
	@Override
	protected void onDestroy() {
		super.onDestroy();
		Intent intent = new Intent(mContext,ScreenAndLockService.class);
		stopService(intent);
	}

}

ScreenAndLockService如下:

package cc.test.testwakelock;

import android.app.KeyguardManager;
import android.app.KeyguardManager.KeyguardLock;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.PowerManager;
/**
 * 注意方法:
 * WakeLock android.os.PowerManager.newWakeLock(int levelAndFlags, String tag)
 * 该方法第一个参数为flag,有几个不同的变量.请查阅官方API
 * 具体的需求,视情况而定
 *
 */
public class ScreenAndLockService extends Service {
	// 键盘管理器
	KeyguardManager mKeyguardManager;
	// 键盘锁
	private KeyguardLock mKeyguardLock;
	// 电源管理器
	private PowerManager mPowerManager;
	// 唤醒锁
	private PowerManager.WakeLock mWakeLock;

	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		System.out.println("----> 开启服务");
		mPowerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
		mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
		
	}

	@Override
	public void onStart(Intent intent, int startId) {
		// 点亮亮屏
		mWakeLock = mPowerManager.newWakeLock
		(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_DIM_WAKE_LOCK, "Tag");
		mWakeLock.acquire();
		// 初始化键盘锁
		mKeyguardLock = mKeyguardManager.newKeyguardLock("");
		// 键盘解锁
		mKeyguardLock.disableKeyguard();
	}

	//一定要释放唤醒锁和恢复键盘
	@Override
	public void onDestroy() {
		super.onDestroy();
		if (mWakeLock != null) {
			System.out.println("----> 终止服务,释放唤醒锁");
			mWakeLock.release();
			mWakeLock = null;
		}
		if (mKeyguardLock!=null) {
			System.out.println("----> 终止服务,重新锁键盘");
			mKeyguardLock.reenableKeyguard();
		}
	}

}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="利用WakeLock点亮屏幕"
        android:layout_centerInParent="true" />

</RelativeLayout>

AndroidManifest.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cc.test.testwakelock"
    android:versionCode="1"
    android:versionName="1.0"
    >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="17" />
    
      <uses-permission android:name="android.permission.WAKE_LOCK"/>
      <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
      <uses-permission android:name="android.permission.DEVICE_POWER"/>
      

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="cc.test.testwakelock.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <service android:name=".ScreenAndLockService"/>
    </application>

</manifest>