Question

我拍照
照片存储在ImageView中
当用户选择Send To Pharmacy按钮时，我希望能够通过蓝牙将ImageView中存储的照片发送到我的电脑。

这可能吗？由于图像在不断变化，我该怎么做？我查看了一些教程和StackOverflow问题，但它们似乎都已经集中在可绘制文件夹中的图像上。

但是在这种情况下，每次用户拍摄照片时，图像都会有所不同。我只想知道如何发送ImageView中的当前照片，然后通过蓝牙将其发送到PC。感谢您的帮助，我对此表示赞赏。

    package com.cognizant.expressprescriptionregistration;


    import static android.os.Environment.getExternalStoragePublicDirectory;

    public class Register extends AppCompatActivity {

        Button bPicButton;
        ImageView imageView;
        String pathToFile;

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

            bPicButton = findViewById(R.id.bTakePhoto);
            imageView = findViewById(R.id.imagePrescription);

            // Ask for permission for Camera and Storage
            if (Build.VERSION.SDK_INT >= 23){
                requestPermissions(new String[] {Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 2);
            }
        }

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

            // if camera successfully pops up and takes photo, set photo in ImageView
            if (resultCode == RESULT_OK){
                if (requestCode == 1){
                    Bitmap bitmap = BitmapFactory.decodeFile(pathToFile);
                    imageView.setImageBitmap(bitmap);
                }
            }
        }

        // Take Picture button onClick listener
        public void takePhoto(View view) {

            setPhotoTaken();

        }

        private void setPhotoTaken() {

            Intent takePhoto = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

            // Make sure the app can handle our intent
            if (takePhoto.resolveActivity(getPackageManager()) != null) {

                File photoFile = null;

                // Created Photo file
                photoFile = createPhotoFile();

                // Get path of our photo file
                if (photoFile != null) {

                    pathToFile = photoFile.getAbsolutePath();
                    Uri photoUri = FileProvider.getUriForFile(Register.this, "com.cognizant.expressprescriptionregistration.fileprovider", photoFile);
                    takePhoto.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
                    startActivityForResult(takePhoto, 1);
                }


            }

        }

        // Create the file where the photo will be stored
        private File createPhotoFile() {

            // Name of file
            String name = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());

            // Location of storage
            File storedDir = getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
            File photo = null;

            try {

                // Creates file in storedDir
                photo = File.createTempFile(name, ".jpg", storedDir);
            } catch (IOException e) {
                e.printStackTrace();
            }

            return photo;
        }

        // Send to Pharmacy Button
        public void sendToPharmacy(View view) {

        }

    }

Answer 1

您可以通过从ImageView获取位图来从ImageView获取当前图像：

Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

之后，您可以保存并共享位图。

拍照后，如何将图像视图中的图像通过蓝牙发送到PC？

1 个答案: