Android: Intent.EXTRA_ALLOW_MULTIPLE allows only s

问题:

I want to open multiple images from the Android gallery using "Intent.EXTRA_ALLOW_MULTIPLE" intent filter:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
    final Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/*");
    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
    intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
    startActivityForResult(Intent.createChooser(intent, "Add images"), SELECT_MULTIPLE_IMAGES);
}

But whatever app I use (native gallery, QuickPic app), I can only select one single picture. The test device is running Android 5.1.

How can I pick multiple images?

回答1:

This is currently working in one of my recent live application which covers selection of images using Gallary for 4.4 and above and below that using writing your own custom gallery.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    try {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_IMAGE_REQUEST_GALLERY);
    }catch(Exception e){
        Intent photoPickerIntent = new Intent(this, XYZ.class);
        startActivityForResult(photoPickerIntent, SELECT_IMAGE_REQUEST);
    }
} else {
    Intent photoPickerIntent = new Intent(this, XYZ.class);
    startActivityForResult(photoPickerIntent, SELECT_IMAGE_REQUEST);
}

回答2:

Ther is no multi select in the native gallery, but you can do it with this library : https://github.com/luminousman/MultipleImagePick

回答3:

/**
 * Extra used to indicate that an intent can allow the user to select and
 * return multiple items. This is a boolean extra; the default is false. If
 * true, an implementation is allowed to present the user with a UI where
 * they can pick multiple items that are all returned to the caller. When
 * this happens, they should be returned as the {@link #getClipData()} part
 * of the result Intent.
 *
 * @see #ACTION_GET_CONTENT
 * @see #ACTION_OPEN_DOCUMENT
 */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == Activity.RESULT_OK) {
        if (data.getData() != null) {
            try {
                files.clear();
                Uri uri = data.getData();
                String url = FileUtils2.getPath(this, uri);
                assert url != null;
                File file = new File(url);
                files.add(file);
                mPresenter.postAnnexData(files);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            //If uploaded with the new Android Photos gallery
            ClipData clipData = data.getClipData();
            files.clear();
            if (clipData != null) {
                for (int i = 0; i < clipData.getItemCount(); i++) {
                    ClipData.Item item = clipData.getItemAt(i);
                    Uri uri = item.getUri();
                    String url = FileUtils2.getPath(this, uri);
                    assert url != null;
                    File file = new File(url);
                    files.add(file);
                }
            }
            mPresenter.postAnnexData(files);
        }
    }
}