PickGalleryImage

1) Create java file ImageGalleryDemoActivity .java
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package com.example.pickgalleryimage;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class ImageGalleryDemoActivity extends Activity {
 
    private ImageView imageView;
   private static int RESULT_LOAD_IMAGE = 1;
 

   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.image_gallery_demo);
       imageView = (ImageView) findViewById(R.id.imgView);
       imageView.setOnClickListener(new View.OnClickListener() {
         
           @Override
           public void onClick(View arg0) {
             
               Intent i = new Intent(
                       Intent.ACTION_PICK,
                       android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
             
               startActivityForResult(i, RESULT_LOAD_IMAGE);
           }
       });
   }
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
     
       if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
           Uri selectedImage = data.getData();
           String[] filePathColumn = { MediaStore.Images.Media.DATA };

           Cursor cursor = getContentResolver().query(selectedImage,
                   filePathColumn, null, null, null);
           cursor.moveToFirst();

           int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
           String picturePath = cursor.getString(columnIndex);
           cursor.close();
           imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
       }
   }
}

2)image_gallery_demo.xml
==================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ImageView
        android:id="@+id/imgView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        android:layout_weight="1"></ImageView>

</LinearLayout>