Wednesday, October 9, 2013

Android Load Images from SDCARD Specific Folder in Gallery view

Android Load Images from SDCARD Specific Folder in Gallery view 

Below the example for how to load images from SDCARD specific folder.

Fetch the images from sdcard specific folder then load into Gallerry view and zoom the images.

Screen Shot
Load images to Gallery view

Zoom Image-selected image
Source Code

Activity Source Code
package com.imageload.vjblog;

import java.io.File;
import java.text.DecimalFormat;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.AdapterView;

import android.widget.ImageView;

import android.widget.Gallery;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

/***
 *
 * @author vijay_kumar
 *
 */

public class MainActivity extends Activity {

       private String[] FilePathStrings;
       private String[] FileNameStrings;
       private File[] listFile;
       Gallery gallerry;
       GridViewAdapter adapter;
       File file;

       @Override
       public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.gridview_main);

              // Check for SD Card
              if (!Environment.getExternalStorageState().equals(
                           Environment.MEDIA_MOUNTED)) {
                     Toast.makeText(this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
                                  .show();
              } else {
                     file = new File(Environment.getExternalStorageDirectory()
                                  + File.separator + "here_your_specific_folder");
                     file.mkdirs();
              }

              if (file.isDirectory()) {
                     listFile = file.listFiles();
                     FilePathStrings = new String[listFile.length];
                     FileNameStrings = new String[listFile.length];

                     for (int i = 0; i < listFile.length; i++) {
                           FilePathStrings[i] = listFile[i].getAbsolutePath();
                           FileNameStrings[i] = listFile[i].getName();
                     }
              }

              gallerry = (Gallery) findViewById(R.id.gridview);
              adapter = new GridViewAdapter(this, FilePathStrings, FileNameStrings);
              gallerry.setSpacing(2);
              gallerry.setAdapter(adapter);

              gallerry.setOnItemClickListener(new OnItemClickListener() {

                     @Override
                     public void onItemClick(AdapterView<?> parent, View view,
                                  int position, long id) {

                           zoomImage(position);
                     }

              });
       }
      
       private void zoomImage(int position) {
              final Dialog dialog = new Dialog(MainActivity.this);
              dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
              dialog.getWindow().setBackgroundDrawableResource(
                           android.R.color.transparent);
              dialog.setContentView(R.layout.image_zoomdialog);
              ImageView imageview = (ImageView) dialog.findViewById(R.id.imageView1);
              Bitmap bmp = BitmapFactory.decodeFile(FilePathStrings[position]);
              imageview.setImageBitmap(bmp);
              dialog.show();
             
       }

}



Adapter Class

package com.imageload.vjblog;


import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.TextView;

public class GridViewAdapter extends BaseAdapter {

       // Declare variables
       private Activity activity;
       private String[] filepath;
       private String[] filename;

       private static LayoutInflater inflater = null;

       public GridViewAdapter(Activity a, String[] fpath, String[] fname) {
              activity = a;
              filepath = fpath;
              filename = fname;
              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) {
             
                // TODO Auto-generated method stub
        ImageView i = new ImageView(activity);
       Bitmap bmp = BitmapFactory.decodeFile(filepath[position]);
      //  i.setImageResource(mImageIds[position]);
        i.setLayoutParams(new Gallery.LayoutParams(200, 200));
        i.setScaleType(ImageView.ScaleType.FIT_XY);
        i.setImageBitmap(bmp);
              return i;
       }
}



Layout

gridview_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="5dip" >

    <Gallery
        android:id="@+id/gridview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:columnWidth="90dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth" />

</RelativeLayout>


image_zoomdialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />

</LinearLayout>


Add permission in Manifest


    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

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