use GridView to display pictures being downloaded through HTTP

[layout]

<GridView
    android:id="@+id/grid_view_2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:numColumns="auto_fit"
    android:columnWidth="90dp"
    android:horizontalSpacing="10dp"
    android:verticalSpacing="10dp"
    android:gravity="center"
    android:stretchMode="columnWidth" >
</GridView>

[adapter]

public class MyImageAdapter extends BaseAdapter {
    private Context mContext;
    private int total_pic_cnt = 0;
    public Bitmap image[];
    public String select_func[];
    public String js_url[];

    // Constructor
    public MyImageAdapter(Context c, String jsFileURL[], Bitmap pic[], String func[], int num){
        mContext = c;
        js_url = jsFileURL;
        image = pic;
        select_func = func;
        total_pic_cnt = num;
    }
   
    @Override
    public int getCount() {
        return total_pic_cnt;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView = new ImageView(mContext);
        imageView.setImageBitmap(image[position]);
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        imageView.setLayoutParams(new GridView.LayoutParams(100, 70));
        return imageView;
    }
}

[new a adapter and start off the rendering]

MainActivity UIthread = (MainActivity)mContext;
UIthread.adapter = new MyImageAdapter(UIthread, jsFileURL, pic, onSelect_func, loaded_pic_cnt);
UIthread.rendering();

[download and convert an image]

pic[loaded_pic_cnt] = BitmapFactory.decodeStream(parser.getURLAsInputStream(n2_1_image));

[draw]

public void rendering() {
        runOnUiThread(new Runnable() {
            public void run() {
                    System.out.println("render it!");
                    selectMenu = (GridView)findViewById(R.id.grid_view_2);
                    selectMenu.setAdapter(adapter);
                    selectMenu.setOnItemClickListener(new OnItemClickListener() {
                        @Override
                        public void onItemClick(AdapterView<?> parent, View v,
                                int position, long id) {
  ...
                        }
                    });
            }
         });
    }


Reference links