AsyncTask

package com.example.cloudzwi0009;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaMetadataRetriever;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.ImageView;

public class ImageLoader extends AsyncTask<SyncFile, Void, Bitmap> {

    private ImageView imageView;

    public ImageLoader(ImageView imageView) {
        this.imageView = imageView;
    }

    @Override
    protected Bitmap doInBackground(SyncFile... params) {
        SyncFile file = (SyncFile) params[0];
        //
        Bitmap bitmap;
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 16;

        Log.d("AsyncFiles","Setting bitmap for " + file.name);

        if (file.name.contains(".mp4")) {
            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
            mediaMetadataRetriever.setDataSource(file.path);
            bitmap = mediaMetadataRetriever.getFrameAtTime(1 * 1000);
        } else {
            bitmap = BitmapFactory.decodeFile(file.path, options);
        }
        return bitmap;
    }

    @Override
    protected void onPostExecute(Bitmap bitmap) {
        imageView.setImageBitmap(bitmap);
    }
}