打开/关闭屏幕在Android中使用摇一摇 [英] turn the screen on/off in Android with a shake

问题描述

我正在需要时，用户摇动手机打开/关闭屏幕的应用程序。到目前为止，我已经得到了作为答案建议侦听甩头一个SensorEventListener这个问题。

I'm making an app that needs to toggle the screen on/off when the user shakes the phone. So far, I've got a SensorEventListener that listens to the shakes as suggested in the answer to this question.

当我发现一摇，我改变屏幕的亮度值作为<建议href=\"http://stackoverflow.com/questions/1875669/calling-hidden-api-in-android-to-turn-screen-off\">this问题的答案。如果我真的不关闭屏幕...如果我通过它的工作原理公共无效setBright（浮点值）方法亮度设置为0.01F这一切的伟大工程完美。但是，如果我在亮度设置为0.0，手机会不会再次打开屏幕...直到我preSS电源按钮，至少。

When I detect a shake, I change the value of the screen's brightness as suggested in this question's answer. It all works great if I don't actually turn the screen off... if I set the brightness to 0.01f through the public void setBright(float value) method it works perfectly. However, if I set the brightness to 0.0f, the phone won't turn the screen again... not until I press the power button, at least.

是我想要做的可能吗？我究竟做错了什么？

Is what I'm trying to do possible? what am I doing wrong?

- 编辑 -

感谢德瑞并的 icyerasor 我再进去看了问题。我先拿 PARTIAL_WAKE_LOCK 之前，我的亮度设置为0.0女，但它仍然无法开机时，我摇动手机上。然而，当我调试应用程序，我看到setBright（1.0F）被称为还好吧，当我摇动手机屏幕关闭;我怀疑是锁定画面以某种方式与它搞乱，因为它在我preSS电源按钮踢。之后我preSS电源键，应用程序继续工作，因为它通常不会。有没有办法绕过锁屏？

Thanks to Dre and icyerasor I've looked further into the issue. I acquire a PARTIAL_WAKE_LOCK before I set the brightness to 0.0f, but it still doesn't turn on when I shake the phone. However, when I debug the app I see that the setBright(1.0f) gets called allright when I shake the phone with the screen turned off; My suspicion is that the lockscreen is somehow messing with it, since it kicks in when I press the power button. After I press the power button, the app continues to work as it usually does. Is there a way to bypass the lockscreen?

感谢您的帮助！

推荐答案

只是一个猜测：设置它brighnes 0.0也可以将手机睡眠模式

Just a guess: Setting it to brighnes 0.0 might also put the phone in sleep mode?

当你想打开它重新编程，尝试获取ACQUIRE_CAUSES_WAKEUP激活锁定：

When you want to turn it on again programmatically, try acquiring a ACQUIRE_CAUSES_WAKEUP Wakelock:

PowerManager pm = (PowerManager)mContext.getSystemService(
                                          Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(
                                      PowerManager.SCREEN_BRIGHT_WAKE_LOCK
                                      | PowerManager.ACQUIRE_CAUSES_WAKEUP,
                                      TAG);
wl.acquire(1000);

这篇关于打开/关闭屏幕在Android中使用摇一摇的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！