ZXing条码扫描器库给Android 6.0设备的相机错误

Question

我已经在我的应用程序中集成了ZXing条码扫描器库，而且我正在处理Android 6.0设备的请求权限对话框。但是我的问题是当我选择'拒绝'请求权限对话框正在获取像下面的图像的错误。如果我点击'允许'应用程序工作正常。任何人都可以帮助我。我很长时间都在挠头解决这个问题。提前感谢。[

以下是我在处理棉花糖权限请求的代码片段。

if (version >= android.os.Build.VERSION_CODES.M) { 
       if (ContextCompat.checkSelfPermission(context, 
         Manifest.permission.CAMERA) 
         != PackageManager.PERMISSION_GRANTED) { 
        if (ActivityCompat.shouldShowRequestPermissionRationale(SearchActivity.this, 
          Manifest.permission.CAMERA)) { 

         ActivityCompat.requestPermissions(SearchActivity.this, 
           new String[]{Manifest.permission.CAMERA}, 
           MY_PERMISSIONS_REQUEST_CAMERA); 

        } else { 

         // No explanation needed, we can request the permission. 

         ActivityCompat.requestPermissions(SearchActivity.this, 
           new String[]{Manifest.permission.CAMERA}, 
           MY_PERMISSIONS_REQUEST_CAMERA); 


        } 
       } 
      } 

@Override 
public void onRequestPermissionsResult(int requestCode, 
             String permissions[], int[] grantResults) { 
    switch (requestCode) { 
     case MY_PERMISSIONS_REQUEST_CAMERA: { 
      // If request is cancelled, the result arrays are empty. 
      if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
       int version3 = Build.VERSION.SDK_INT; 
       // permission was granted, yay! Do the 
       // contacts-related task you need to do. 
       Toast.makeText(SearchActivity.this, "Permission granted", Toast.LENGTH_SHORT).show(); 
      } else { 

       Toast.makeText(SearchActivity.this, "Camera is required", Toast.LENGTH_SHORT).show(); 
      } 
      return; 
     } 
    } 
} 

而下面是我的错误日志。

08-23 10:49:07.894 9832-10612/com.test.xxx E/CameraInstance﹕ Failed to open camera 
java.lang.RuntimeException: Fail to connect to camera service 
     at android.hardware.Camera.<init>(Camera.java:511) 
     at android.hardware.Camera.open(Camera.java:353) 
     at com.google.zxing.client.android.camera.open.OpenCameraInterface.open(OpenCameraInterface.java:83) 
     at com.journeyapps.barcodescanner.camera.CameraManager.open(CameraManager.java:121) 
     at com.journeyapps.barcodescanner.camera.CameraInstance$3.run(CameraInstance.java:158) 
     at android.os.Handler.handleCallback(Handler.java:746) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.os.HandlerThread.run(HandlerThread.java:61) 

08-23 10:49:09.268 9832-10668/com.test.ecommercetrial E/CameraInstance﹕ Failed to configure camera 
java.lang.NullPointerException: Attempt to invoke virtual method 'android.hardware.Camera$Parameters android.hardware.Camera.getParameters()' on a null object reference 
     at com.journeyapps.barcodescanner.camera.CameraManager.setParameters(CameraManager.java:353) 
     at com.journeyapps.barcodescanner.camera.CameraManager.configure(CameraManager.java:139) 
     at com.journeyapps.barcodescanner.camera.CameraInstance$4.run(CameraInstance.java:171) 
     at android.os.Handler.handleCallback(Handler.java:746) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.os.HandlerThread.run(HandlerThread.java:61) 

Answer 1

用最新的棉花糖版本号升级你的gradle。希望它能解决问题。