如何在棉花糖设备上获取Picasa图像文件夹？

Question

My application allows users to select an image to upload. When users select an image from a picasa album my data intent comes back with dat=content://com.sec.android.gallery3d.provider/picasa/item/... .

Apparently when selecting an image from a picasa folder, I must handle getting the image differently as noted in this answer .

But before I implement a fix, I want to be able to reproduce the crash so I can verify my fix actually works. So how can I get a Picasa folder on my new (marshmallow) Android test device since Picasa has been killed by Google?

Answer 1

The most guaranteed way of getting a file send inside an intent, is to open a stream to it and copy it over to a private folder on your app.

This way works for local file, content uri, picasa, all of it.

Something like that:

private File getSharedFile() {
    Uri uri = intent.getExtras().getParcelable(Intent.EXTRA_STREAM);
    // or using the new compat lib
    Uri uri = ShareCompat.IntentReader(this).getStream();

    InputStream is = null;
    OutputStream os = null;

    try {
       File f = ... define here a temp file // maybe getCacheDir();
       is = getContentResolver().openInputStream(uri);
       os = new BufferedOutputStream(new FileOutputStream(f));

       int read;
       byte[] bytes = new byte[2048];

       while ((read = is.read(bytes)) != -1) {
          os.write(bytes, 0, read);
       }
       return f;
       } catch (Exception e) {
           ... handle exceptions, buffer underflow, NPE, etc
       } finally {
          try { is.close(); } catch (Exception e) { /* u never know */ }
          try {
            os.flush();
            os.close();
          } catch (Exception e) { /* seriously can happen */ }
       }
      return null;
}