当用户使用电源按钮关闭时,我需要以编程方式打开屏幕,是的我在Activity
中始终有正确的标志以保持屏幕开启,但它不会避免用户按下电源按钮。
到目前为止,我找到了一个解决方案,但它使用的是已弃用的唤醒锁
sWakeLock = sPM.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, TAG_WAKELOCK);
sWakeLock.acquire();
sWakeLock.release();
有更好的方法来实现它吗?
答案 0 :(得分:12)
在棒棒糖中你可能想要添加更多标志:
final Window win = getWindow();
win.addFlags( WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON );
得到了这个
答案 1 :(得分:3)
这是从活动中打开屏幕的最新方法:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
this.setTurnScreenOn(true);
} else {
final Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
}
使用FLAG_TURN_SCREEN_ON,但此标志在API级别27中已被弃用,因此请从API级别27开始使用Activity.setTurnScreenOn(true)。
答案 2 :(得分:2)
代码
PowerManager powerManager = (PowerManager) context.getSystemService(context.POWER_SERVICE);
PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK |
PowerManager.ACQUIRE_CAUSES_WAKEUP |
PowerManager.ON_AFTER_RELEASE, "appname::WakeLock");
//acquire will turn on the display
wakeLock.acquire();
//release will release the lock from CPU, in case of that, screen will go back to sleep mode in defined time bt device settings
wakeLock.release();
在清单文件中,权限应为
<uses-permission android:name="android.permission.WAKE_LOCK"/>