package com.example.http; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; 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.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.annotation.SuppressLint; import android.app.Activity; @SuppressLint("HandlerLeak") public class MainActivity extends Activity { private static final int SHOW_RESPONSE = 0; private TextView textView; private Button button; private Handler handler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case SHOW_RESPONSE: String response = (String) msg.obj; textView.setText(response); break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.webview); button = (Button) findViewById(R.id.button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // sendRequestWithHttpConnection(); sendRequestWithHttpClient(); } }); } /** * httpclient网络访问 */ protected void sendRequestWithHttpClient() { new Thread(new Runnable() { @Override public void run() { try { HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet("http://www.baidu.com"); HttpResponse httpResponse = httpClient.execute(httpGet); if (httpResponse.getStatusLine().getStatusCode() == 200) { // 请求成功 HttpEntity entity = httpResponse.getEntity(); String response = EntityUtils.toString(entity, "utf-8"); Message message = new Message(); message.what = SHOW_RESPONSE; message.obj = response.toString(); handler.sendMessage(message); } } catch (Exception e) { e.printStackTrace(); } finally { } } }).start(); } /** * httpURLConnection网络访问 */ protected void sendRequestWithHttpConnection() { new Thread(new Runnable() { @Override public void run() { HttpURLConnection connection = null; try { URL url = new URL("http://www.baidu.com"); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setConnectTimeout(8000); connection.setReadTimeout(8000); connection.setDoInput(true); connection.setDoOutput(true); InputStream inputStream = connection.getInputStream(); BufferedReader reader = new BufferedReader( new InputStreamReader(inputStream)); StringBuffer response = new StringBuffer(); String line; while ((line = reader.readLine()) != null) { response.append(line); } Message message = new Message(); message.what = SHOW_RESPONSE; message.obj = response.toString(); handler.sendMessage(message); } catch (Exception e) { e.printStackTrace(); } finally { if (connection != null) { connection.disconnect(); } } } }).start(); } } 布局: