1.目录结构

2.MainActivity.java, 重写接口中的方法，与Presenter连接，通过Presenter展示页面数据

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ProgressBar;

import android.widget.Toast;

import com.example.alva.mvptest.R;

import com.example.alva.mvptest.presenter.ILoginPresenter;

import com.example.alva.mvptest.presenter.ILoginPresenterImpl;

import butterknife.BindView;

import butterknife.ButterKnife;

public class MainActivityextends AppCompatActivityimplements ILoginView, View.OnClickListener{

        @BindView(R.id.ed_username)

        EditTexted_username;

@BindView(R.id.ed_password)

        EditText ed_password;

        @BindView(R.id.bt_login)

        Button bt_login;

        @BindView(R.id.bt_clear)

        Button bt_clear;

        @BindView(R.id.pb_login)

        ProgressBar pb_login;

        ILoginPresenter iLoginPresenter;

        @Override

        protected void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.activity_main);

                ButterKnife.bind(this);

                bt_clear.setOnClickListener(this);

                bt_login.setOnClickListener(this);

                iLoginPresenter =new ILoginPresenterImpl(this);//创建Presenter实例

                iLoginPresenter.setProgressBarVisiblity(View.INVISIBLE);

            }

        public void onClick(View view){

                switch (view.getId()){

                        case R.id.bt_login:

                                 iLoginPresenter.setProgressBarVisiblity(View.VISIBLE);

                                bt_login.setEnabled(false);

                                bt_clear.setEnabled(false);

                                iLoginPresenter.doLogin(ed_username.getText().toString(),ed_password.getText().toString());

                                break;

                        case R.id.bt_clear:

                                  iLoginPresenter.clear();

   break;

                        }

            }

            @Override

            public void onClearText() {

                        ed_password.setText("");

                        ed_username.setText("");

   }

            @Override

   public void onLoginResult(Boolean result, int code) {

iLoginPresenter.setProgressBarVisiblity(View.INVISIBLE);

                        bt_login.setEnabled(true);

                        bt_clear.setEnabled(true);

                        if(result){

                                Log.i("login", "onLoginResult: success****");

                                Toast.makeText(MainActivity.this,"登陆成功",Toast.LENGTH_SHORT).show();

                        }else{

                                Log.i("login", "onLoginResult: fail****");

                                Toast.makeText(MainActivity.this,"登陆失败,code="+code,Toast.LENGTH_SHORT).show();

                        }

            }

            @Override

            public void onSetProgressBarVisibility(int visibility) {

                        pb_login.setVisibility(visibility);

            }

}