android中HttpClient的应用（POST方法）

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);
}
}
}