Android 第三方开源：Volley通过网络下载数据

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		final TextView text = (TextView) findViewById(R.id.text);
		final ImageView image = (ImageView) findViewById(R.id.image);
		
		//第一步： 创建Volley队列
		RequestQueue request = Volley.newRequestQueue(this);
		//第二步：访问对象 ，String类型
		StringRequest stringRequest = new StringRequest("http://www.kan300.com", new Listener<String>() {
			/*
			 * 
			 * onResponse 连接正确时显示
			 */
			@Override
			public void onResponse(String response) {
				
				text.setText(response);
				
			}
		}, new ErrorListener() {
			/*
			 * 
			 * onErrorResponse 连接错误时显示
			 */
			@Override
			public void onErrorResponse(VolleyError error) {
				Toast.makeText(MainActivity.this, "错误！", Toast.LENGTH_SHORT).show();
				
			}
		});
		
		//访问对象： image类型
		ImageRequest imageRequest = new ImageRequest("http://avatar.csdn.net/9/7/A/1_zhangphil.jpg", new Listener<Bitmap>() {

			@Override
			public void onResponse(Bitmap response) {
				
				image.setImageBitmap(response);
				
			}
		}, 0, 0, Config.RGB_565, new ErrorListener() {

			@Override
			public void onErrorResponse(VolleyError error) {
				
			}
		});
		//第三步：将访问对象添加到队列中
		request.add(stringRequest);
		request.add(imageRequest);
	}
	

}
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