Question

我一直在尝试拍照并将其发送到我的Android应用中的服务器。我知道这个问题在这里被多次询问过，但是我无法找到将解决方案正确地集成到我的代码中的方法，因为它看起来像;所有如果我拍的照片都是低质量的（50K，我理解的缩略图？）。我的代码如下：

    private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        try {
            File file = createImageFile();//new File(getImageFileName());
            FileOutputStream fOS = new FileOutputStream(file);
            //TODO TEST PNG OR JPEG
            imageBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOS );
            Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
            Uri contentUri = Uri.fromFile(file);
            mediaScanIntent.setData(contentUri);
            this.sendBroadcast(mediaScanIntent);

            AsyncTaskHTTP asyncTaskHTTP = new AsyncTaskHTTP("Image");
            asyncTaskHTTP.execute();
        }
        catch (Exception e){

        }
    }
}

private File createImageFile() throws IOException {
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "User" + ID + "Image" + imageCounter + "_" + timeStamp;
    imageCounter++;
    File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    String path = storageDir.getPath() + "/ALUMA";
    File temp = new File(path);
    temp.mkdirs();
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".png",         /* suffix */
            temp      /* directory */
    );
    currentImagePath = image.getPath();
    return image;
}

我看到我需要在某处添加文件URI？或者是否有一种更简单的方法（我尝试添加文件＆u？但是当我试图拍照时，应用程序只是崩溃了）？

Answer 1

你得到的是小缩略图。使用以下代码获取高分辨率图像。你必须在打开相机意图之前传递文件路径。

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    // Ensure that there's a camera activity to handle the intent
                    if (takePictureIntent.resolveActivity(getActivity().getPackageManager()) != null) {
                        // Create the File where the photo should go
                        File photoFile = null;
                        try {
                            photoFile = createImageFile();
                        } catch (IOException ex) {
                            // Error occurred while creating the File
                            ex.printStackTrace();
                        }
                        // Continue only if the File was successfully created
                        if (photoFile != null) {
                            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
                            startActivityForResult(takePictureIntent, CAMERA_REQUEST);
                        }
                    }

您可以在ActivityResult

上检索如下图像

if (requestCode == CAMERA_REQUEST && resultCode == getActivity().RESULT_OK) {

                Toast.makeText(getActivity().getApplicationContext(), "Processing Image, Please Wait.", Toast.LENGTH_LONG).show();

                if(mCurrentPhotoPath != null){

                    Log.d("onActivityResult", "Inside Image1");

                    BitmapFactory.Options options = new BitmapFactory.Options();
                    options.inPreferredConfig = Bitmap.Config.ARGB_8888;
                    Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, options);


                    }
                }else{
                    //Toast.makeText(getActivity().getApplicationContext(), "mCurrentPhotoPath is Null", Toast.LENGTH_SHORT).show();
                }


            }

mCurrentPhotoPath是文件生成传递给摄像机意图的路径

保存在android中的图像质量很差

1 个答案: