Android HttpClient网络通信的测试

public class MainActivity extends Activity {private Button button_get,button_post;private TextView textView;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                button_get = (Button) findViewById(R.id.button1);        button_post = (Button) findViewById(R.id.button2);        textView = (TextView) findViewById(R.id.tv);        button_get.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubString url = "";//自己选择路劲HttpGet getrequest = new HttpGet(url);HttpClient client = new DefaultHttpClient();try {HttpResponse response = client.execute(getrequest);if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){String entity = EntityUtils.toString(response.getEntity());textView.setText(entity);}else{textView.setText("网络错误");}} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}                });                button_post.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubString url = "";//自己选择路劲HttpPost request_post = new HttpPost(url);List<NameValuePair> pairs = new ArrayList<NameValuePair>();pairs.add(new BasicNameValuePair("pairs", "request_post"));HttpClient client = new DefaultHttpClient();try{HttpEntity entity = new UrlEncodedFormEntity(pairs,"UTF-8");request_post.setEntity(entity);HttpResponse response = client.execute(request_post);if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){  String str = EntityUtils.toString(response.getEntity());     textView.setText(str);   }else{textView.setText("网络错误");}}catch (Exception e) {// TODO: handle exception}}});      }}
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