[android-developers] TestHTTP

I wrote some codes to test httpClient in andorid. This is my onCreate() function, and i got some errors like 03-19 10:00:37.832: E/AndroidRuntime(1208): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lilg/com.lilg.TestHTTPActivity}: java.lang.IllegalStateException: Target host must not be null, or set in parameters.

can anyone help me? Thank you very much!

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@Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        TextView tv = (TextView) findViewById(R.id.tv);

         HttpClient httpclient = new DefaultHttpClient();

         // 创建一个GET请求

         HttpGet request = new HttpGet("www.baidu.com");

         // 发送GET请求，并将响应内容转换成字符串

         //String response = null;

// try {

// response = httpclient.execute(request, new BasicResponseHandler());

// } catch (ClientProtocolException e) {

// // TODO Auto-generated catch block

// e.printStackTrace();

// } catch (IOException e) {

// // TODO Auto-generated catch block

// e.printStackTrace();

// }

         HttpClient client = new DefaultHttpClient();  

         HttpResponse response = null;

try {

   response = client.execute(request);

System.out.println("get");

if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){  

             String str = EntityUtils.toString(response.getEntity());  

             tv.setText(str);  

         }else{  

             tv.setText("请求错误");  

         }  

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}  

         

 

        //Log.v("response text", response);

        tv.setText("test");

    }

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