android中HttpClient的应用（POST方法）

首先在http://hc.apache.org/downloads.cgi下载HttpClient包

直接看代码

 import android.os.Handler;
 import android.os.Message;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.TextView;

 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;

 import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.HttpStatus;
 import org.apache.http.NameValuePair;
 import org.apache.http.client.ClientProtocolException;
 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.client.utils.URLEncodedUtils;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.protocol.HTTP;
 import org.apache.http.util.EntityUtils;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;

 public class MainActivity extends AppCompatActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         // 开启一个子线程，进行网络操作，等待有返回结果，使用handler通知UI
         new Thread(networkTask).start();

     }

     Handler handler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
             super.handleMessage(msg);
             Bundle data = msg.getData();
             String val = data.getString("value");
             Log.i("mylog", "请求结果为-->" + val);
             // TODO
             // UI界面的更新等相关操作
         }
     };

     /**
      * 网络操作相关的子线程
      */
     Runnable networkTask = new Runnable() {
         @Override
         public void run() {
             // TODO
             // 在这里进行 http request.网络请求相关操作
             String TAG = "ABC";

             //baseUrl
             String url = "http://192.168.8.7/insert.php";

             HttpPost request = new HttpPost(url);

             //先将参数放入List，再对参数进行URL编码
             List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();
             params.add(new BasicNameValuePair("firstname", "这个是安卓"));
             params.add(new BasicNameValuePair("lastname", "这是安卓加进去的"));
             params.add(new BasicNameValuePair("age", "66"));

             try {
                 HttpEntity entity = new UrlEncodedFormEntity(params, "UTF-8");

                 request.setEntity(entity);

                 HttpClient client = new DefaultHttpClient();

                 HttpResponse response = client.execute(request);

                 Log.e(TAG, "Response Code: " +
                         response.getStatusLine().getStatusCode());

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

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

                 }
             } catch (IOException e) {
                 Log.e(TAG, "~~~~~~"+e);
                 e.printStackTrace();
             }
             Message msg = new Message();
             Bundle data = new Bundle();
             data.putString("value", "请求结果");
             msg.setData(data);
             handler.sendMessage(msg);
         }
     }
 }

需要注意的是http请求在安卓3.0后就不能放在MainTread中了