App CameraSurface首次启动崩溃。提交权限后，它的作品

我有一个应用程序，创建一个TextureView与相机连接到它。目前，该活动也是应用程序的主要开发者。我想按照预期使用新的Permission Style，并且在相机应该使用时称为Permission。但是，当我第一次启动应用程序时，它会调用我的权限，我接受它，之后应用程序崩溃（Logcat中只有信息是SIG：9）。当我再次启动它（因为我已经提交），它工作正常。我是否在错误的地方设置了权限调用？（btw。我称多个权限，因为我也开始创建一个图片库）。我找不到类似的问题，所以我现在想问这个问题。App CameraSurface首次启动崩溃。提交权限后，它的作品

这里是我的代码：

的OnCreate：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    callPermissions(); // calls multiple Permissions. 

    setContentView(R.layout.camera_landscape); 

    mCaptureButton = (Button) this.findViewById(R.id.photoButton); 
    mCalcButton = (Button) this.findViewById(R.id.descriptor); 
    mTrackButton = (Button) this.findViewById(R.id.track); 

    mTextureView = (AutoTextureView) findViewById(R.id.texture); 
}

callPermissions：

private void callPermissions(){ 
    List<String> permissionsNeeded = new ArrayList<String>(); 

    final List<String> permissionsList = new ArrayList<String>(); 
    if(!addPermission(permissionsList, Manifest.permission.WRITE_EXTERNAL_STORAGE)) 
     permissionsNeeded.add("WRITE_EXTERNAL_STORAGE"); 
    if(!addPermission(permissionsList, Manifest.permission.CAMERA)) 
     permissionsNeeded.add("CAMERA"); 

    if(permissionsList.size()> 0){ 
     if(permissionsNeeded.size() > 0){ 
      String message = "You need to grant access to " + permissionsNeeded.get(0); 
      for(int i = 1; i < permissionsNeeded.size(); i++) 
       message = message + ", " + permissionsNeeded.get(i); 

      showMessageOKCancel(message, 
        new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          ActivityCompat.requestPermissions(CameraTest.this, permissionsList.toArray(new String[permissionsList.size()]), 
            REQUEST_CODE_ALL_PERMISSIONS); 
         } 
        }); 
      return; 
     } 
     ActivityCompat.requestPermissions(CameraTest.this, permissionsList.toArray(new String[permissionsList.size()]), 
       REQUEST_CODE_ALL_PERMISSIONS); 
    } 
}

而重写onRequestPermissionResult：

@Override 
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults){ 
    switch(requestCode){ 
     case REQUEST_CAMERA_PERMISSION: 
      if(grantResults[0] == PackageManager.PERMISSION_GRANTED){ 
       openCamera(); 
      }else{ 
       Toast.makeText(CameraTest.this, "CAMERA access Denied", Toast.LENGTH_SHORT).show(); 
      } 
      break; 
     case REQUEST_CODE_ALL_PERMISSIONS:{ 
      Map<String, Integer> perms = new HashMap<String, Integer>(); 

      perms.put(Manifest.permission.WRITE_EXTERNAL_STORAGE, PackageManager.PERMISSION_GRANTED); 
      perms.put(Manifest.permission.CAMERA, PackageManager.PERMISSION_GRANTED); 

      for(int i = 0; i < permissions.length; i++) 
       perms.put(permissions[i], grantResults[i]); 

      if(perms.get(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED && 
        perms.get(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){ 

      }else{ 
       //Permissions Denied 
       Toast.makeText(CameraTest.this, "Some Permission is Denied", Toast.LENGTH_SHORT).show(); 
      } 
     } 
     default: 
      super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
    } 
}

这里的logcat的输出：

10-25 10:56:56.906 26719-26719/? I/art: Late-enabling -Xcheck:jni 
10-25 10:56:56.926 26719-26725/? I/art: Debugger is no longer active 
10-25 10:56:57.084 26719-26743/? D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true 
10-25 10:56:57.163 26719-26743/? I/Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: QUALCOMM Build: 10/21/15, 369a2ea, I96aee987eb 
10-25 10:56:57.172 26719-26743/? I/OpenGLRenderer: Initialized EGL, version 1.4 
10-25 10:56:57.331 26719-26719/? I/CameraManagerGlobal: Connecting to camera service 
10-25 10:57:02.407 26719-26719/com.example.camera D/AndroidRuntime: Shutting down VM 
10-25 10:57:02.408 26719-26866/com.example.camera I/Process: Sending signal. PID: 26719 SIG: 9

来源

2016-10-25 Marcel T

嗯，我能解决我自己的解决方案，我也有一个方法（这是我完全错过补充）被称为openCamera其中的TextureSurface配置摄像头：

private void openCamera() { 
    CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); 
    try { 
     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { 
      if(!ActivityCompat.shouldShowRequestPermissionRationale(CameraTest.this, Manifest.permission.CAMERA)){ 
       //showMessageOKCancel("You need to allow access to Camera", new DialogInterface.OnClickListener(){ 
       // @Override 
       // public void onClick(DialogInterface dialog, int which){ 
       //  ActivityCompat.requestPermissions(CameraTest.this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION); 
       // } 
       //}); 
       return; 
      } 
      ActivityCompat.requestPermissions(CameraTest.this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION); 
      return; 
     } 
     cameraManager.openCamera(mCameraId, mDeviceCallback, mBackgroundHandler); 
    }catch(CameraAccessException e) { 
     e.printStackTrace(); 
    } 
}

有，当用户尚未授予权限时，我也启动了一个对话框。在我评论了showMessageOkCancel方法（它创建对话框）后，一切正常，只有我的callPermissions方法请求我的两个权限，并且应用程序在第一次启动时不会崩溃。

来源

2016-10-25 09:33:48

App CameraSurface首次启动崩溃。提交权限后，它的作品

回答

相关问题