package com.app.main;
 
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
 
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
 
public class Main extends Activity {
 
  String url = "http://e.hiphotos.baidu.com/image/w%3D2048/sign=61711bd121a446237ecaa262ac1a730e/e850352ac65c10385f10af69b3119313b07e892a.jpg";
  ImageView imgView = null;
  Button btn = null;
  ProgressDialog dialog = null;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
 
    imgView = (ImageView) this.findViewById(R.id.imageview);
    btn = (Button) this.findViewById(R.id.btn);
    dialog = new ProgressDialog(this);
    dialog.setMessage("下载图片中......");
 
    btn.setOnClickListener(new OnClickListener() {
 
      @Override
      public void onClick(View view) {
 
        new MyTask().execute(url);
      }
 
    });
 
  }
 
  class MyTask extends AsyncTask<String, Void, Bitmap> {
 
    @Override
    protected void onPreExecute() {
 
      super.onPreExecute();
 
      dialog.show();
 
    }
 
    @Override
    protected Bitmap doInBackground(String... params) {
 
      Bitmap bitmap = null;
 
      String url = params[0];
 
      HttpClient client = new DefaultHttpClient();
 
      HttpGet getMethod = new HttpGet(url);
 
      try {
 
        HttpResponse response = client.execute(getMethod);
 
        if (response.getStatusLine().getStatusCode() == 200) {
          HttpEntity entity = response.getEntity();
 
          byte[] data = EntityUtils.toByteArray(entity);
 
          bitmap = BitmapFactory
              .decodeByteArray(data, 0, data.length);
 
        }
 
      } catch (Exception e) {
 
      }
 
      return bitmap;
    }
 
    @SuppressLint("NewApi")
    @Override
    protected void onPostExecute(Bitmap result) {
 
      super.onPostExecute(result);
 
      imgView.setImageBitmap(result);
 
      dialog.dismiss();
    }
 
  }
 
}