android java lang runtimeexception 无法连接到相机服务 [英] android java lang runtimeexception fail to connect to camera service

问题描述

我目前正在研究手电筒的开/关.我收到此错误 java.lang.RuntimeException: Fail to connect to camera service 我不知道为什么会发生此错误.我参考了很多解决方案，但我的问题仍然没有解决.手电筒打开时不出现错误，手电筒关闭时出现错误.

I am currently working on Flashlight On/OFF. I am getting this error java.lang.RuntimeException: Fail to connect to camera service I don't know why this error is occurring. I referred to many solutions but my problem was still not solved. When flashlight is on, the error does not occur but when the flashlight is off then the error occurs.

我的代码主代码.

我的清单权限:

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus"/>

推荐答案

试试这个...

 static Camera camera = null;

在顶部声明它.

 try{ 
   if(clickOn == true) {
       clickOn = false;
       camera = Camera.open();
       Parameters parameters = camera.getParameters();
       parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);
       camera.setParameters(parameters);
       camera.startPreview();

       remoteViews.setViewVisibility(R.id.button1, View.GONE);
       remoteViews.setViewVisibility(R.id.button2, View.VISIBLE);
       localAppWidgetManager.updateAppWidget(componentName, remoteViews);
   } else {
       clickOn = true;
       camera.stopPreview();
       camera.release();
       camera = null;

       remoteViews.setViewVisibility(R.id.button1, View.VISIBLE);
       remoteViews.setViewVisibility(R.id.button2, View.GONE);
       localAppWidgetManager.updateAppWidget(componentName, remoteViews);
   }    
} catch(Exception e) {
   Log.e("Error", ""+e);
}

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