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();

        }



    }



}

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