android發送Post請求和Get請求範例

package com.example.demorequest;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;public class MainActivity extends Activity {    private Button getButton = null;    private Button postButton = null;    private EditText strView = null;        private String baseUrl = "http://www.baidu.com/s?";        private HttpResponse httpResponse = null;//響應對象    private HttpEntity httpEntity = null;//取出響應內容的訊息對象    InputStream inputStream = null;//輸入資料流對象        /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                strView = (EditText) findViewById(R.id.strView);        getButton = (Button) findViewById(R.id.getButton);        postButton = (Button) findViewById(R.id.postButton);                //get方法發送請求        getButton.setOnClickListener(new OnClickListener(){            public void onClick(View arg0) {                String str = strView.getText().toString();                String url = baseUrl + "?wd=" + str;                //產生一個請求對象                HttpGet httpGet = new HttpGet(url);                //產生一個http用戶端對象                HttpClient httpClient = new DefaultHttpClient();                //發送請求                try {                    httpResponse = httpClient.execute(httpGet);//接收響應                    httpEntity = httpResponse.getEntity();//取出響應                    //用戶端收到響應的資訊流                    inputStream = httpEntity.getContent();                    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));                    String result = "";                    String line = "";                    while((line = reader.readLine()) != null){                        result = result + line;                    }                    System.out.println(result);                } catch (Exception e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                } finally{//最後一定要關閉輸入資料流                    try{                        inputStream.close();                    }catch(Exception e){                        e.printStackTrace();                    }                }            }                    });                //post方法發送請求        postButton.setOnClickListener(new OnClickListener(){            public void onClick(View arg0) {                // TODO Auto-generated method stub                String str = strView.getText().toString();//參數                NameValuePair nameValuePair = new BasicNameValuePair("content", str);//索引值對                 //然後將索引值對放到列表裡(類似於形成數組)                //List是一個介面，而ListArray是一個類。ListArray繼承並實現了List。所以List不能被構造，但可以向上面那樣為List建立一個引用，而ListArray就可以被構造。                //List list = new ArrayList();這句建立了一個ArrayList的對象後把上溯到了List。此時它是一個List對象了                //而ArrayList list=new ArrayList();建立一對象則保留了ArrayList的所有屬性。                //為什麼一般都使用 List list = new ArrayList() ,而不用 ArrayList alist = new ArrayList()呢？ 問題就在於List有多個實作類別，如 LinkedList或者Vector等等，現在你用的是ArrayList，也許哪一天你需要換成其它的實作類別呢？，這時你只要改變這一行就行了：List list = new LinkedList(); 其它使用了list地方的代碼根本不需要改動。                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();                nameValuePairs.add(nameValuePair);//將索引值對放入到列表中                try {                    HttpEntity requestHttpEntity = new UrlEncodedFormEntity(nameValuePairs);//對參數進行編碼操作                    //產生一個post請求對象                    HttpPost httpPost = new HttpPost(baseUrl);                    httpPost.setEntity(requestHttpEntity);                    //產生一個http用戶端對象                    HttpClient httpClient = new DefaultHttpClient();//發送請求                    try {                        httpResponse = httpClient.execute(httpPost);//接收響應                        httpEntity = httpResponse.getEntity();//取出響應                        //用戶端收到響應的資訊流                        inputStream = httpEntity.getContent();                        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));                        String result = "";                        String line = "";                        while((line = reader.readLine()) != null){                            result = result + line;                        }                        System.out.println(result);                    } catch (Exception e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    } finally{//最後一定要關閉輸入資料流                        try{                            inputStream.close();                        }catch(Exception e){                            e.printStackTrace();                        }                    }                } catch (Exception e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }                    });    }}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <EditText        android:id="@+id/strView"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />    <Button        android:id="@+id/getButton"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="使用get方法發送請求" />    <Button        android:id="@+id/postButton"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="使用post方法發送請求" /></LinearLayout>