Android MVP模式下的登录实现
项目结构：
package com.example.mvpdemo.view; /** * 基本的页面操作 * */ public interface IBaseView { //Toast形式提示 public void showMsg(String msg); //加载提示框 public void showLoading(); //隐藏加载提示框 public void hiddenLoading(); //页面跳转 public void jumpActivity(); //返回 public boolean back(); }
package com.example.mvpdemo.view; /** * 登陆界面的View，继承基本的IBaseView，IBaseView对于Login界面操作已经足够，所以没有实质内容 * */ public interface ILoginView extends IBaseView { }
package com.example.mvpdemo.model; /** * 最基本的模型 * */ public interface IBaseModel { public static final int STATUS_FAIL = -1;// 验证失败 public static final int STATUS_SUCCESS = 0;// 成功 public static final int STATUS_NORMAL = 1;// 正常状态 public static final int STATUS_VERIFY_ING = 2;// 正常状态 }
package com.example.mvpdemo.model; /** * 登陆的数据模型 * */ public interface ILoginModel extends IBaseModel{ /** * * @param username 用户名 * @param pwd 密码 * @param loginCallBack 登陆回调接口 */ public void login(String username,String pwd,ILoginCallBack loginCallBack); /** * 登陆回调接口及回调方法 */ interface ILoginCallBack { public void onStatus(); } }
package com.example.mvpdemo.model.impl; import com.example.mvpdemo.model.ILoginModel; import android.os.AsyncTask; /** * 登陆模型的具体实现 * */ public class LoginModelImpl implements ILoginModel { public int status = ILoginModel.STATUS_NORMAL; //记录登陆状态 public String msg; //登陆操作后的提示语 @Override public void login(final String username, final String pwd, final ILoginCallBack loginCallBack) { if (status == ILoginModel.STATUS_VERIFY_ING) { return; } new AsyncTask<Void, Void, ILoginCallBack>() { @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); } @Override protected ILoginCallBack doInBackground(Void... params) { // TODO Auto-generated method stub //具体的业务实现 if (username.equals("123") && pwd.equals("123")) { status = ILoginModel.STATUS_SUCCESS; msg = "登陸成功"; } else { msg = "用户名或密码错误"; status = ILoginModel.STATUS_FAIL; } return loginCallBack; } @Override protected void onPostExecute(ILoginCallBack result) { // TODO Auto-generated method stub loginCallBack.onStatus(); //登陆成功后进行接口回调，告诉presenter对view操作进行界面操作 super.onPostExecute(result); } }.execute(); } }
package com.example.mvpdemo.presenter; import com.example.mvpdemo.model.ILoginModel; import com.example.mvpdemo.model.ILoginModel.ILoginCallBack; import com.example.mvpdemo.model.impl.LoginModelImpl; import com.example.mvpdemo.view.ILoginView; /** * 登陆的Presenter */ public class LoginPresenter { LoginModelImpl loginModel; ILoginView iLoginView; public LoginPresenter(ILoginView iLoginView) { super(); loginModel = new LoginModelImpl(); this.iLoginView = iLoginView; } public ILoginView getiLoginView() { return iLoginView; } public void setiLoginView(ILoginView iLoginView) { this.iLoginView = iLoginView; } /** * 调用model进行数据处理，根据回调接口来操作ILoginView进行对应的activity界面更新 * @param username * @param pwd */ public void login(String username, String pwd) { System.out.println(username+","+pwd); loginModel.login(username, pwd, new ILoginCallBack() { public void onStatus() { System.out.println(loginModel.status+""); switch (loginModel.status) { case LoginModelImpl.STATUS_SUCCESS: iLoginView.jumpActivity(); iLoginView.showMsg(loginModel.msg); break; case LoginModelImpl.STATUS_FAIL: iLoginView.showMsg(loginModel.msg); break; default: break; } loginModel.status=ILoginModel.STATUS_NORMAL; } }); } }
package com.example.mvpdemo; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import com.example.mvpdemo.presenter.LoginPresenter; import com.example.mvpdemo.view.ILoginView; public class LoginActivity extends Activity implements ILoginView { String Tag = "MainActivity"; LoginPresenter loginPresenter; EditText username_et; EditText pwd_et; Button submit_btn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); loginPresenter = new LoginPresenter(this); initView(); } void initView() { username_et = (EditText) findViewById(R.id.username_et); pwd_et = (EditText) findViewById(R.id.pwd_et); submit_btn = (Button) findViewById(R.id.submit_btn); submit_btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub String username = username_et.getText().toString(); String pwd = pwd_et.getText().toString(); loginPresenter.login(username, pwd); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public void showMsg(String msg) { // TODO Auto-generated method stub Log.i(Tag, msg); Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); } @Override public void showLoading() { // TODO Auto-generated method stub Log.i(Tag, "showLoading"); } @Override public void hiddenLoading() { // TODO Auto-generated method stub Log.i(Tag, "hiddenLoading"); } @Override public void jumpActivity() { // TODO Auto-generated method stub startActivity(new Intent(LoginActivity.this, MainActivity.class)); } long lastTime; @Override public boolean back() { long currTime=System.currentTimeMillis(); if(currTime-lastTime>3000){ showMsg("再按一次退出"); lastTime=currTime; }else{ finish(); } return false; } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { // TODO Auto-generated method stub if(keyCode==KeyEvent.KEYCODE_BACK){ return back(); } return super.onKeyDown(keyCode, event); } }
