如何从onActivityResult（int requestCode，int resultCode，Intent data）获取结果？

Question

I'm working on an Android project which allow the user to take a picture using the camera.

My method looks like this :

private void takePicture(){
        Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(camera, 1337);
    }

And in my onActivityResult I take the picture and store it in my SdCard. I trying to modify my takePicture() function to return the path of the picture (String instead void).

I already know that getPath() from java.io.File allow me to do that.

So my question is : how can I modify my function to return the path of the picture?

Answer 1

takePicture won't be able to return a path, as it'll return before your intent has completed. You'll need to do something with the path inside onActivityResult

Answer 2

Here is the code to get the path of captured and stored image in pictureCallback

in this code mFilePath is the string which is holding the path of image...

PictureCallback mPicture = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            File pictureFile = getOutputMediaFile();
            if (pictureFile == null) {
                return;
            }
            try {
                FileOutputStream fos = new FileOutputStream(pictureFile);
                fos.write(data);
                fos.close();

                String mFilePath = pictureFile.getAbsolutePath(); 
            } catch (FileNotFoundException e) {

            } catch (IOException e) {
            }
        }
    };

    private static File getOutputMediaFile() {
        File mediaStorageDir = new File(
                Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyCameraApp");
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d("MyCameraApp", "failed to create directory");
                return null;
            }
        }
        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        File mediaFile;
        mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");

        return mediaFile;
    }
}