Android：简单联网获取网页代码
设置权限，在AndroidManifest.xml加入
<uses-permission android:name="android.permission.INTERNET"/>
public class MainActivity extends Activity {
private EditText address;
private Button getbutton;
private TextView text;
@Override
protected void onCreate(Bundle savedInstanceState) {
//版本4.0后需加这个，不然就报错android.os.NetworkOnMainThreadException
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectDiskReads().detectDiskWrites().detectNetwork()
.penaltyLog().build());
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
.detectLeakedSqlLiteObjects().detectLeakedClosableObjects()
.penaltyLog().penaltyDeath().build());
//
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
//初始化
address = (EditText) findViewById(R.id.address);
getbutton = (Button) findViewById(R.id.getbutton);
text = (TextView) findViewById(R.id.text);
getbutton.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String url = address.getText().toString();
getPDAServerData(url);
}
});
}
public void getPDAServerData(String url) {
HttpClient client = new DefaultHttpClient();
HttpPost request;
try {
request = new HttpPost(url);
//调用HttpClient对象的execute(HttpUriRequest request)发送请求，返回一个HttpResponse
HttpResponse response = client.execute(request);
//返回响应码为200
if (response.getStatusLine().getStatusCode() == 200) {
//从响应中获取消息实体
HttpEntity entity = response.getEntity();
if (entity != null) {
String out = EntityUtils.toString(entity);
text.setText(out);
}
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
