AndroidはokHttp（get方式）でログインします。

package com.liunan.okhttpdemo3post.Utils;

import java.io.IOException;

import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
 * Created by Administrator on 2016-03-27.
 */
public class HttpUtils {

  OkHttpClient client = new OkHttpClient();
  public static final MediaType JSON
      = MediaType.parse("application/json; charset=utf-8");

  public String login(String url, String json) throws IOException {
    //            json
    RequestBody body = RequestBody.create(JSON, json);
    //RequestBody formBody = new FormEncodingBuilder()

    Request request = new Request.Builder()
        .url(url)
        .post(body)
        .build();

    Response response = client.newCall(request).execute();

    String result = response.body().string();


    return result;


  }


  public String bolwingJson(String username, String password) {
    return "{'username':" + username + "," + "'password':" + password + "}";
    //   "{'username':" + username + ","+"'password':"+password+"}";
  }


} 

package com.liunan.okhttpdemo3post;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.liunan.okhttpdemo3post.Utils.HttpUtils;

import org.w3c.dom.Text;

import java.io.IOException;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
  private static final String TAG ="MainActivity" ;
  //   
  private EditText mEtUsername;
  //  
  private EditText mEtPwd;
  //    
  private Button mBtnLogin;
  private TextView mTvResult;

  private String url ="http://192.168.1.102:8080/Login/login";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    initView();
    initListener();
  }

  /**
   *      
   */
  private void initView() {

    mEtUsername = (EditText) findViewById(R.id.login_et_name);
    mEtPwd = (EditText) findViewById(R.id.login_et_pwd);

    mBtnLogin = (Button) findViewById(R.id.login_btn_login);


    mTvResult = (TextView) findViewById(R.id.login_tv_result);

  }

  /**
   *      
   */
  private void initListener() {

    mBtnLogin.setOnClickListener(this);


  }

  /*
        
   */
  @Override
  public void onClick(View v) {
    if(v==mBtnLogin){
      login();
    }
  }

  /*
    
   */
  private void login() {

    final String username = mEtUsername.getText().toString().trim();
    final String password = mEtPwd.getText().toString().trim();


    if(TextUtils.isEmpty(username) || TextUtils.isEmpty(password)){

      Toast.makeText(MainActivity.this, "           ", Toast.LENGTH_SHORT).show();
      return;
    }

    new Thread(){
      @Override
      public void run() {

          HttpUtils httpUtils = new HttpUtils();
          //   JSON
          String user = httpUtils.bolwingJson(username, password);



        //String user ="{'username':" + username + ","+"'password':"+password+"}";

        Log.d(TAG, "user:" + user);

        try {
          final String result = httpUtils.login(url, user);
          Log.d(TAG, "  :" + result);
          //  UI, UI   
          runOnUiThread(new Runnable() {
            @Override
            public void run() {
              if("SUCCESS".equals(result)){

                mTvResult.setText("    ");

              }else{
                mTvResult.setText("    ");
              }
            }
          });
        } catch (IOException e) {
          e.printStackTrace();
        }




      }
    }.start();


  }
}