Start the trim video activity with an intent

Question

I can take a video with an intent now what are the details to create an intent to start the default video trimmer activity? And check if it present on the device?

Answer 1

This solution relies on a version of the AOSP Gallery2 package being installed on the device. You can do it like this:

// The Intent action is not yet published as a constant in the Intent class
// This one is served by the com.android.gallery3d.app.TrimVideo activity
// which relies on having the Gallery2 app or a compatible derivative installed
Intent trimVideoIntent = new Intent("com.android.camera.action.TRIM");

// The key for the extra has been discovered from com.android.gallery3d.app.PhotoPage.KEY_MEDIA_ITEM_PATH
trimVideoIntent.putExtra("media-item-path", getFilePathFromVideoURI(this, videoUri));
trimVideoIntent.setData(videoUri);

// Check if the device can handle the Intent
List<ResolveInfo> list = getPackageManager().queryIntentActivities(trimVideoIntent, 0);
if (null != list && list.size() > 0) {
    startActivity(trimVideoIntent); // Fires TrimVideo activity into being active
}

The method getFilePathFromVideURI is based on the answer of this question: Get filename and path from URI from mediastore

public String getFilePathFromVideoURI(Context context, Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = { MediaStore.Video.Media.DATA };
        cursor = context.getContentResolver().query(contentUri,  proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

videoUri is an Uri pointing to something like this: content://media/external/video/media/43. You can gather one by issuing an ACTION_PICK Intent:

Intent pickVideoUriIntent =  new Intent(Intent.ACTION_PICK, MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(pickVideoUriIntent, PICK_VIDEO_REQUEST);

In onActivityResult get the uri like so:

....
case PICK_VIDEO_REQUEST:
    Uri videoUri = data.getData();
     ...

This solution works on my Galaxy Nexus with Android 4.3 Jelly Bean.

I am not sure if this is available on all Android devices. A more reliable solution may be to fork the Gallery2 app and put the TrimVideo activity together with its dependencies into a library that can be delivered with your app. Hope this helps anyway.