未經相機許可無法打開相機“0”

Question

我的清單中有以下內容

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

但是我收到此錯誤

An error occurred while connecting to camera 0: Status(-8, EX_SERVICE_SPECIFIC): '1: validateClientPermissionsLocked:1165: Caller ... (PID 10153, UID 6049) cannot open camera "0" without camera permission'

我正在嘗試使用此代碼讓相機工作

public static Camera getCameraInstance(){
    Camera c = null;
    try {
        c = Camera.open();
    } catch (Exception e) {
        Log.e("getCameraInstance", "exception", e);
    }
    return c; // returns null if camera is unavailable
}

如何讓這台相機工作？

Answer 1

需要在運行時啟用權限。 當索引為0的相機沒有權限時，輸出上述錯誤。 向清單添加權限並不是在手機上啟用它的原因......下面的代碼將。

    public static void checkCameraPermissions(Context context){
        if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA)
                != PackageManager.PERMISSION_GRANTED)
        {
            // Permission is not granted
            Log.d("checkCameraPermissions", "No Camera Permissions");
            ActivityCompat.requestPermissions((Activity) context,
                    new String[] { Manifest.permission.CAMERA },
                    100);
        }
    }