Android - Zoom Image Using Intent

create Activity add this code :

 package com.zoomimage;  
 import java.io.File;  
 import android.app.Activity;  
 import android.content.Intent;  
 import android.net.Uri;  
 import android.os.Bundle;  
 import android.view.View;  
 import android.view.View.OnClickListener;  
 import android.widget.Button;  
 import android.widget.ImageView;  
 import android.widget.Toast;  
 public class ZoomimageActivity extends Activity {  
      private ImageView imagev;  
      private Uri uri_img;  
      private Button btnZ;  
      private String mimetype;  
      /** Called when the activity is first created. */  
      @Override  
      public void onCreate(Bundle savedInstanceState) {  
           super.onCreate(savedInstanceState);  
           setContentView(R.layout.main);  
           imagev = (ImageView) findViewById(R.id.imageView1);  
           // imagev.setImageUri(Uri.fromFile(new File("/sdcard/test.jpg")));  
           // imagev.setImageUri(Uri.parse(new File("/sdcard/cats.jpg").toString()));  
           uri_img = Uri.fromFile(new File("/sdcard/test.jpg"));  
           imagev.setImageURI(uri_img);  
           String extension = android.webkit.MimeTypeMap  
                     .getFileExtensionFromUrl(uri_img.toString());  
           mimetype = android.webkit.MimeTypeMap.getSingleton()  
                     .getMimeTypeFromExtension(extension);  
           btnZ = (Button) findViewById(R.id.button1);  
           btnZ.setOnClickListener(new OnClickListener() {  
                @Override  
                public void onClick(View v) {  
                     // TODO Auto-generated method stub  
                     Toast.makeText(ZoomimageActivity.this, "Please wait..",  
                               Toast.LENGTH_SHORT).show();  
                     Intent i = new Intent(android.content.Intent.ACTION_VIEW);  
                     i.setDataAndType(uri_img, mimetype);  
                     startActivity(i);  
                }  
           });  
      }  
 }  

Enjoy Coding....