PowenKo, Android, Tutorial 013-2, UI, ImageView, display image from URL, set wallpage

package com.powenko.Tutorial_UI_Image_displayURL;

import java.net.URL;
import java.net.URLConnection;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;




public class Tutorial_UI_Image_displayURLActivity extends Activity 
{ 

  private Button mButton1;
  private Button mButton2;
  private ImageView mImageView; 
  private Bitmap bm;
  private String path="http://www.powenko.com/en/wp-content/uploads/2011/08/device-2011-08-22-055330.png";
  
  @Override 
  public void onCreate(Bundle savedInstanceState) 
  { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
 
    mButton1 =(Button) findViewById(R.id.myButton1);
    mButton2 =(Button) findViewById(R.id.myButton2);
  
    mImageView = (ImageView) findViewById(R.id.myImage);
    mButton2.setEnabled(false);
    

    mButton1.setOnClickListener(new Button.OnClickListener() 
    { 
      @Override 
      public void onClick(View v) 
      { 
    	     
      
          setImage(path,1);
       
      } 
    });
    
  
    mButton2.setOnClickListener(new Button.OnClickListener() 
    { 
      @Override 
      public void onClick(View v) 
      { 
        try
        {
        
            setImage(path,2);
         
        }
        catch (Exception e)
        {
          showDialog("error");
          bm = null;
          mImageView.setImageBitmap(bm);
          mButton2.setEnabled(false);
          e.printStackTrace();
        }
      } 
    }); 
  }
  

  private void setImage(String path,int type)
  {
    try 
    {  
      URL url = new URL(path); 
      URLConnection conn = url.openConnection(); 
      conn.connect();  
      if(type==1)
      {
     
        bm = BitmapFactory.decodeStream(conn.getInputStream());
        mImageView.setImageBitmap(bm);
        mButton2.setEnabled(true);
      }
      else if(type==2)
      {
        
    	  Tutorial_UI_Image_displayURLActivity.this.setWallpaper(conn.getInputStream());        
        bm = null;
        mImageView.setImageBitmap(bm);
        mButton2.setEnabled(false);
        showDialog("ok.");
      }   
    } 
    catch (Exception e) 
    { 
      showDialog("error!");
      bm = null;
      mImageView.setImageBitmap(bm);
      mButton2.setEnabled(false);
      e.printStackTrace(); 
    } 
  }
  

  private void showDialog(String mess){
    new AlertDialog.Builder(Tutorial_UI_Image_displayURLActivity.this).setTitle("Message")
    .setMessage(mess)
    .setNegativeButton("process...", new DialogInterface.OnClickListener()
    {
      @Override
	public void onClick(DialogInterface dialog, int which)
      {          
      }
    })
    .show();
  }  
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
  android:id="@+id/layout1"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  xmlns:android="http://schemas.android.com/apk/res/android"
>
  <TextView
    android:id="@+id/myText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=""
    android:textSize="16sp"
    android:layout_x="20px"
    android:layout_y="12px"
  />
  <Button
    android:id="@+id/myButton1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="download"
    android:layout_x="70px"
    android:layout_y="102px"
  />
  <Button
    android:id="@+id/myButton2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="wallpage"
    android:layout_x="150px"
    android:layout_y="102px"
  />
  <ImageView
    android:id="@+id/myImage"
    android:layout_width="200dip"
    android:layout_height="200dip"
    android:layout_x="20px"
    android:layout_y="152px"
  />
</AbsoluteLayout>