How can I display images from a specific folder on android gallery

Question

How can I display all images from a specific folder on android gallery like, for example, whatapp does. I`m using MediaScannerConnectionClient

File folder =         


        

Answer 1

You should add Grid view Adapter class.

public class GalleryPictureActivity extends Activity
{
    private String[]        FilePathStrings;
    private File[]          listFile;
    GridView                grid;
    GridViewAdapter         adapter;
    File                    file;
    public static Bitmap    bmp = null;
    ImageView               imageview;

    @Override
    protected void onCreate (Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gallery_picture);
        // Check for SD Card
        if (!Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED))
        {
            Toast.makeText(this, "Error! No SDCARD Found!",
                    Toast.LENGTH_LONG).show();
        }
        else
        {
            // Locate the image folder in your SD Card
            file = new File(Environment.getExternalStorageDirectory()
                    .getPath() + "/images");
        }
        if (file.isDirectory())
        {
            listFile = file.listFiles();
            FilePathStrings = new String[listFile.length];
            for (int i = 0; i < listFile.length; i++)
            {
                FilePathStrings[i] = listFile[i].getAbsolutePath();
            }
        }
        grid = (GridView)findViewById(R.id.gridview);
        adapter = new GridViewAdapter(this, FilePathStrings);
        grid.setAdapter(adapter);

        grid.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick (AdapterView parent, View view,
                    int position, long id)
            {
                imageview = (ImageView)findViewById(R.id.imageView1);
                int targetWidth = 700;
                int targetHeight = 500;
                BitmapFactory.Options bmpOptions = new BitmapFactory.Options();
                bmpOptions.inJustDecodeBounds = true;
                BitmapFactory.decodeFile(FilePathStrings[position],
                        bmpOptions);
                int currHeight = bmpOptions.outHeight;
                int currWidth = bmpOptions.outWidth;
                int sampleSize = 1;
                if (currHeight > targetHeight || currWidth > targetWidth)
                {
                    if (currWidth > currHeight)
                        sampleSize = Math.round((float)currHeight
                                / (float)targetHeight);
                    else
                        sampleSize = Math.round((float)currWidth
                                / (float)targetWidth);
                }
                bmpOptions.inSampleSize = sampleSize;
                bmpOptions.inJustDecodeBounds = false;
                bmp = BitmapFactory.decodeFile(FilePathStrings[position],
                        bmpOptions);
                imageview.setImageBitmap(bmp);
                imageview.setScaleType(ImageView.ScaleType.FIT_XY);
                bmp = null;

            }
        });

    }
}

Another Class GridView Adapter :

   public class GridViewAdapter extends BaseAdapter
{
    private Activity                activity;
    private String[]                filepath;
    private static LayoutInflater   inflater    = null;
    Bitmap                          bmp         = null;

    public GridViewAdapter (Activity a, String[] fpath)
    {
        activity = a;
        filepath = fpath;
        inflater = (LayoutInflater)activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public int getCount ()
    {
        return filepath.length;
    }

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

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

    public View getView (int position, View convertView, ViewGroup parent)
    {
        View vi = convertView;
        if (convertView == null)
            vi = inflater.inflate(R.layout.gridview_item, null);
        ImageView image = (ImageView)vi.findViewById(R.id.image);
        int targetWidth = 100;
        int targetHeight = 100;
        BitmapFactory.Options bmpOptions = new BitmapFactory.Options();
        bmpOptions.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filepath[position], bmpOptions);
        int currHeight = bmpOptions.outHeight;
        int currWidth = bmpOptions.outWidth;
        int sampleSize = 1;
        if (currHeight > targetHeight || currWidth > targetWidth)
        {
            if (currWidth > currHeight)
                sampleSize = Math.round((float)currHeight
                        / (float)targetHeight);
            else
                sampleSize = Math.round((float)currWidth
                        / (float)targetWidth);
        }
        bmpOptions.inSampleSize = sampleSize;
        bmpOptions.inJustDecodeBounds = false;
        bmp = BitmapFactory.decodeFile(filepath[position], bmpOptions);
        image.setImageBitmap(bmp);
        image.setScaleType(ImageView.ScaleType.FIT_XY);
        bmp = null;
        return vi;
    }
}

Activity:

activity_gallery_picture:

Another activity Layout :