卖花网站源码/上海最新新闻热点事件

有些场景需要程序自动点亮屏幕,解开屏幕锁,以方便用户即时操作,下面用代码来实现这一功能:

//得到键盘锁管理器对象
KeyguardManager  km= (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
//参数是LogCat里用的Tag
KeyguardLock kl = km.newKeyguardLock("unLock");
//解锁
kl.disableKeyguard();

//获取电源管理器对象
PowerManager pm=(PowerManager) getSystemService(Context.POWER_SERVICE);
//获取PowerManager.WakeLock对象,后面的参数|表示同时传入两个值,最后的是LogCat里用的Tag
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_DIM_WAKE_LOCK, "bright");
//点亮屏幕
wl.acquire();
//释放
wl.release();

需要在AndroidManifest.xml添加权限:

    <uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

flags参数说明:

1. PARTIAL_WAKE_LOCK: Screen off, keyboard light off 
2. SCREEN_DIM_WAKE_LOCK: screen dim, keyboard light off 
3. SCREEN_BRIGHT_WAKE_LOCK: screen bright, keyboard light off 
4. FULL_WAKE_LOCK: screen bright, keyboard bright