Question

我写了一个代码来访问相机为个人资料页面拍照。代码如下：

case R.id.textViewTakePhoto:
                try {
                    Utility.showPopupMenuWindow(mContext, false, mPopupWindow);

                    int camera = ContextCompat.checkSelfPermission(mContext, android.Manifest.permission.CAMERA);

                    if (camera != PackageManager.PERMISSION_GRANTED) {
                        Intent intent= new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                        startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
                    }
                    else{
                        ActivityCompat.requestPermissions((Activity) mContext,
                                new String[]{android.Manifest.permission.CAMERA},
                                9);
                    }
                } catch (Exception e) {
                    Log.e(TAG, "Can't access camera" + e.getMessage());
                    e.printStackTrace();
                }   

                break;

在我的清单文件中，我添加了以下代码：

<uses-permission android:name="android.permission.CAMERA" />
<!--for camera purposes-->
    <uses-feature
        android:name="android.hardware.camera.any"
        android:required="true" />
    <uses-feature
        android:name="android.hardware.camera.autofocus"
        android:required="false" />

compileSdkVersion是25.当我尝试运行应用程序时，它会抛出错误：

Can't access cameraPermission Denial: starting Intent { act=android.media.action.IMAGE_CAPTURE cmp=com.google.android.GoogleCamera/com.android.camera.activity.CaptureActivity } from ProcessRecord{1d685bf 17561:com.dell.engage/u0a215} (pid=17561, uid=10215) with revoked permission android.permission.CAMERA

如何解决此问题

Answer 1

您在使用或不授予检查权限时使用了错误的代码。见下面的代码：

   if (camera != PackageManager.PERMISSION_GRANTED) {
              ActivityCompat.requestPermissions((Activity) mContext,
              new String[]{android.Manifest.permission.CAMERA},9); 
   }
   else{
              Intent intent= new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
               startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
   }

Answer 2

试试这段代码：

你的清单中的

<uses-feature
        android:name="android.hardware.camera"
        android:required="true" />

Java代码

你的onClick方法

：

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, RESULT_LOAD_CAMERA);

然后实施onActivityResult

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode == RESULT_LOAD_CAMERA && resultCode == RESULT_OK && null != data) {

            Bundle bundle = data.getExtras();
            final Bitmap btm = (Bitmap) bundle.get("data");
            mImgView.setImageBitmap(btm);


        } else {
            Toast.makeText(MainActivity.this, "no image selected", Toast.LENGTH_LONG).show();
        }

    }

Answer 3

您尚未声明任何权限。尝试这样的事情：

index.js

同时检查您是否在清单文件中给出了CAMERA权限，如下所示：

if(ActivityCompat.checkSelfPermission(YourActivity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){
                                    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                                    startActivityForResult(cameraIntent, CAMERA_REQUEST);
                                }else {
                                    String[] permissionRequest = {Manifest.permission.CAMERA};
                                    requestPermissions(permissionRequest, 8675309);
                                }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(requestCode == 8675309){
            if(grantResults[0] == PackageManager.PERMISSION_GRANTED){
                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cameraIntent, CAMERA_REQUEST);
  } else {
                Toast.makeText(EnterDataView.this, "Cannot take photo without permission.", Toast.LENGTH_LONG).show();
            }
        }
    }

Answer 4

试试这段代码：

@OnClick(R.id.button_camera)
    void onClickCamera() {
        mPresenter.openCamera(this);
    }

    @OnClick(R.id.gallery_button)
    void onClickGallery() {
        mPresenter.openGallery(this);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        mPresenter.startEditing(requestCode, resultCode);
    }

    @Override
    public void startGallery() {
        Intent intent = new Intent(HomeActivity.this, GalleryActivity.class);
        startActivity(intent);
    }

    @Override
    public void startCamera(Uri uri) {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null) {
            intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
            startActivityForResult(intent, REQ_CAMERA);
        }
    }

即使在清单文件中声明了适当的权限，也无法访问摄像头

4 个答案: