java.lang.RuntimeException:无法连接到相机服务 [英] java.lang.RuntimeException: Fail to Connect to camera service

问题描述

我尝试制作一个可以打开和关闭相机闪光灯的应用.我的 atm 代码如下所示:

I tried to make an app than can switch my camera flash on and off. The code I have atm looks like this:

Camera flash;
Camera.Parameters params;

flash = Camera.open();
params = flash.getParameters();

params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);        
flash.setParameters(params);

在清单 xml 中:

<permission android:name="android.permission.FLASHLIGHT"  

android:permissionGroup="android.permission-group.HARDWARE_CONTROLS"
          android:protectionLevel="normal" />

<permission android:name="android.permission.CAMERA"> </permission>

每次我运行代码时，应用程序都会在flash = Camera.open();"处崩溃出现此错误:

Everytime I run the code, the app crashes at "flash = Camera.open();" with this error:

java.lang.RuntimeException: 连接相机服务失败

java.lang.RuntimeException: Fail to Connect to camera service

我做错了什么?

推荐答案

要访问设备摄像头，你必须像这样在你的Android Manifest中声明CAMERA权限，

To access the device camera, you must declare the CAMERA permission in your Android Manifest like this,

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

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