设备屏幕关闭/进入睡眠状态时手电筒不工作(android studio) [英] flashlight not working,when device screen is off/sleep (android studio)

问题描述

我创建了一个手电筒应用程序，手电筒正常工作.但是当设备屏幕电源关闭/处于睡眠状态时，手电筒不起作用.当设备屏幕处于关闭/睡眠状态时，我希望手电筒继续打开..

i created a flashlight application,flashlight working. but flashlight not work when device screen power is off/sleep. i want flashlight continue on ,when device screen in off/sleep..

我是这个网站的新手，我不知道如何上传完整代码，所以我将代码上传到我的博客网站

i am new for this site, i don't know,how upload full code, so i upload code in my blog site

manifest code

<application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">
    <activity android:name=".MainActivity" android:noHistory="true"            android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".About" android:noHistory="true"            android:screenOrientation="portrait"            >

    </activity>
</application>
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<uses-feature android:name="android.hardware.Camera"></uses-feature>

请在此处查看完整代码

推荐答案

在if(！isOn)块内添加以下代码:

Add below code inside if(!isOn) block:

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

并且屏幕将永远不会休眠.然后在该语句的else块中，添加以下代码，以重新启用睡眠功能:

And the screen will never sleep. Then in the else block of that statement, add below code, which reenables the sleep feature:

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

如果您最后使用onStop()方法在用户关闭应用程序时关闭相机，请添加相同的代码 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 在那个街区也是如此.

If you use onStop() method at the end for turning camera off when user closes the app, add the same code getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); In that block too.

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