如何使用 java 将相机拍摄的图像添加到 Android 中的图像查看器？我试过下面的代码

Question

我也添加了相机权限，它运行良好，但图像视图没有保存捕获的图像。清单文件也仍然正确。该应用程序没有崩溃，即使它也没有显示任何错误。我什至想将图像添加到数据库中。

    public class RiderProfile extends AppCompatActivity {

        ImageView imgDp,imgDlFront,imgDlback;
        TextView txtDp,txtDl;
        Button btnSave;
        public  static final int CAMERA_REQUEST = 1888;
        private static final String TAG = "1111";
        private static final int MY_CAMERA_PERMISSION_CODE = 100;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_rider_profile);

            imgDp = (ImageView)findViewById(R.id.imgDp);
            imgDlFront = (ImageView)findViewById(R.id.imgDlFront);
            imgDlback = (ImageView)findViewById(R.id.imgDlback);
            txtDp = (TextView) findViewById(R.id.txtDp);
            txtDl = (TextView)findViewById(R.id.txtDl);
            btnSave = (Button) findViewById(R.id.btnSave);


            imgDp.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                    startActivityForResult(i, CAMERA_REQUEST);
                }
                protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                    if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
                        Bitmap photo1 = (Bitmap) data.getExtras().get("data");
                        Log.d(TAG, "onActivityResult: click ");
                        imgDp.setImageBitmap(photo1);
                    }
                }

            });


            imgDlFront.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                    startActivityForResult(i, CAMERA_REQUEST);
                }
                protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                    if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
                        Bitmap photo2 = (Bitmap) data.getExtras().get("data");
                        Log.d(TAG, "onActivityResult: click ");
                        imgDlFront.setImageBitmap(photo2);
                    }
                }

            });



            imgDlback.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                    startActivityForResult(i, CAMERA_REQUEST);
                }
                protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                    if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
                        Bitmap photo3 = (Bitmap) data.getExtras().get("data");
                        Log.d(TAG, "onActivityResult: click ");
                        imgDlback.setImageBitmap(photo3);
                    }
                }

            });


        }
    }

Answer 1

    1.  @Override
        public void onCameraOpen() {
          Intent pictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (pictureIntent.resolveActivity(getPackageManager()) != null) {
                try {
                    imageFile = CameraUtils.createImageFile(this);
                } catch (IOException e) {
                    e.printStackTrace();
                    return;
                }
                imageUri = FileProvider.getUriForFile(this, getPackageName() + ".provider", imageFile);
                pictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(pictureIntent, IntentRequestCode.RESULT_CODE_IMAGE_CAPTURE);
            }
        }

2.  @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode) {
            case RESULT_CODE_IMAGE_CAPTURE:
                if (resultCode == RESULT_OK) {
                    onCaptureImage(imageFile, imageUri);
                } else {
                    Toast.makeText(this, "Camera canceled", Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }

3. void onCaptureImage(File imageFile, Uri imageUri) {
        Uri uri = Uri.fromFile(imageFile);
        String selectedImagePath = CameraUtils.getPath(application, uri);
        File file1 = new File(selectedImagePath);
        if (file1.length() != 0) {
           FileAttachments b_data = new FileAttachments();
            b_data.setFileName(file1.getName());
            CameraUtils.writeScaledDownImage(file1, getApplication());
            b_data.setFile(file1);
        }
    }