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 = new File("/sdcard/myfolder/");
allFiles = folder.list();
SCAN_PATH=Environment.getExternalStorageDirectory().toString()+"/myfolder/"+allFiles[0];
@Override
public void onScanCompleted(String path, Uri uri) {
    try {
        if (uri != null) {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(uri);
            startActivity(intent);

        }
    } finally {
        conn.disconnect();
        conn = null;
    }
}

private void startScan() {
    if (conn != null) {
        conn.disconnect();
    }
    conn = new MediaScannerConnection(this, this);
    conn.connect();
}
    @Override
public void onMediaScannerConnected() {
    conn.scanFile(SCAN_PATH, "image/*");
}

But I`m getting a error at this point:

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(uri);
    startActivity(intent);

Specific here:

startActivity(intent);

Fail to get type for: content://media/external/images/media/267830 No Activity found to handle Intent

On onScanCompleted my path and uri parameters are not null.

Answer 1

Hi you can use the code below, i hope it helps you .

package com.example.browsepicture;

import java.io.File;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.MediaScannerConnectionClient;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BrowsePicture2 extends Activity {
    String SCAN_PATH;
    File[] allFiles ;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_browse_picture);

        File folder = new File(Environment.getExternalStorageDirectory().getPath()+"/aaaa/");
        allFiles = folder.listFiles();

        ((Button) findViewById(R.id.button1))
                .setOnClickListener(new OnClickListener() {
                    public void onClick(View arg0) {
                        new SingleMediaScanner(BrowsePicture2.this, allFiles[0]);
                    }
                });
    }

    public class SingleMediaScanner implements MediaScannerConnectionClient {

        private MediaScannerConnection mMs;
        private File mFile;

        public SingleMediaScanner(Context context, File f) {
            mFile = f;
            mMs = new MediaScannerConnection(context, this);
            mMs.connect();
        }

        public void onMediaScannerConnected() {
            mMs.scanFile(mFile.getAbsolutePath(), null);
        }

        public void onScanCompleted(String path, Uri uri) {
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setData(uri);
            startActivity(intent);
            mMs.disconnect();
        }

    }
}

Answer 2

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:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/LinearLayout1"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center" >

    <GridView
            android:id="@+id/gridview"
            android:layout_width="fill_parent"
            android:layout_height="match_parent" 
            android:layout_weight=".85">

   </GridView>

   <ImageView
           android:id="@+id/imageView1"
           android:layout_width="fill_parent"
           android:layout_height="fill_parent"
           android:layout_weight=".25"
           android:scaleType="fitXY"
           android:src="@drawable/galleryimage" />

  </LinearLayout>

Another activity Layout :

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" >
     <ImageView
             android:id="@+id/image"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content" />
 </RelativeLayout>