Question

我正在使用一个隐含的Intent来拍照。我一直在关注这个tutorial中概述的工作。我遇到的问题是没有交付添加到Intent的额外内容。这是我正在使用的代码：

private void dispatchTakePictureIntent(Context context) {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        // Ensure that there's a camera activity to handle the intent
        if (takePictureIntent.resolveActivity(context.getPackageManager()) != null) {
            // Create the File where the photo should go
            File photoFile = null;
            try {
                photoFile = createImageFile(this.getActivity());
            } catch (IOException ex) {
                Log.e(TAG, "Error creating file: " + ex.toString());
                //TODO: 2017/1/24 - Handle file not created
                AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
                builder.setTitle("Error")
                        .setMessage(ex.toString());

                final AlertDialog dialog = builder.create();
                dialog.show();

            }
            // Continue only if the File was successfully created
            if (photoFile != null) {
                Uri photoURI = FileProvider.getUriForFile(context,
                        "com.example.myapp",
                        photoFile);
                //THIS EXTRA IS NOT BEING ADDED TO THE INTENT
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);

                galleryAddPic(context, photoFile.getAbsolutePath());
            }
        }
    }

触发onActivityResult方法时，Intent为空。这是代码：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
        //These extras are empty. I have used the debug tool, and there is nothing in here. 
        Bundle extras = data.getExtras();
        //extras is null
        imageBitmap = (Bitmap) extras.get("data");
        previewImage.setImageBitmap(imageBitmap);
    }
}

为什么意图是空的？我该怎么做才能解决这个问题？

Answer 1

为什么意图是空的？

因为您要求将其设为空，请在EXTRA_OUTPUT请求中添加ACTION_IMAGE_CAPTURE。引用the documentation：

调用者可以传递额外的EXTRA_OUTPUT来控制该图像的写入位置。如果EXTRA_OUTPUT不存在，则在额外字段中返回小尺寸图像作为Bitmap对象。这对于只需要小图像的应用程序非常有用。如果存在EXTRA_OUTPUT，则将将全尺寸图像写入EXTRA_OUTPUT的Uri值。

我需要做些什么来解决这个问题？

或者：

摆脱EXTRA_OUTPUT（如果您想要缩略图大小的图片）或
停止寻找"data"个额外信息，并查看您在EXTRA_OUTPUT

相机意图不添加额外

1 个答案: