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