第一篇(仅仅只是雏形)

1. 首先展示包结构
   
   2.我们首先要清楚mvp实现的方式
   MVP把Activity中的UI逻辑抽象成View接口，把业务逻辑抽象成Presenter接口，Model类还是原来的Model。
   Activity中的操作

   public class MainActivity extends AppCompatActivity implements 
   View.OnClickListener,BasicLogin {
   private EditText mobile,password;
   private Button butLogin;
   private MyPresent myPresent;
   private Dao dao;
   private Intent intent;
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       //初始化
       mobile = (EditText) findViewById(R.id.mobile);
       password = (EditText) findViewById(R.id.password);
       butLogin = (Button) findViewById(R.id.but_login);
       dao = new Dao(MainActivity.this);
       butLogin.setOnClickListener(this);
   
       Cursor query = dao.query("shuju", null, null, null, null, null, null);
       if (query.moveToFirst()){
          /* do {
               String username = query.getString(query.getColumnIndex("username"));
               String password = query.getString(query.getColumnIndex("password"));
   
           }while(query.moveToNext());*/
           startActivity(new Intent(MainActivity.this,Main2Activity.class));
           finish();
       }
   }
   
   
   @Override
   public void onClick(View v) {
       String mobile = this.mobile.getText().toString().trim();
       String pwd = this.password.getText().toString().trim();
       if (mobile.equals("")||pwd.equals("")){
           Toast.makeText(MainActivity.this,"不可以为空",Toast.LENGTH_SHORT).show();
           return;
       }
       myPresent = new MyPresent(this,MainActivity.this);
   
       myPresent.login(mobile,pwd);
   }
   
   @Override
   public void callBack(User data , Context context) {
       Toast.makeText(getBaseContext(),"欢迎"+data.getData().getUsername()+"登录",Toast.LENGTH_LONG).show();
       intent = new Intent(MainActivity.this,Main2Activity.class);
       String keys = data.getData().getUsername();
       intent.putExtra("keys",keys);
       startActivity(intent);
   }
   }
   

MyPresent

 public class MyPresent {

    private BasicLogin dataCall;
    private Context context;
    private Dao dao;
    public MyPresent(BasicLogin dataCall, Context context){
        this.dataCall = dataCall;
        this.context = context;
    }

    private Handler mHandler = new Handler(Looper.getMainLooper()){
        @Override
        public void handleMessage(Message msg) {
            User loginData = (User) msg.obj;
            Dao dao = new Dao(context);
            //数据库
            ContentValues values = new ContentValues();
            values.put("username",loginData.getData().getUsername());
            values.put("password",loginData.getData().getPassword());
            dao.insert("shuju",null,values);
            dataCall.callBack(loginData,context);
        }
    };
    //Presentle_login
    public void login(final String mobile , final String password){
        new Thread(new Runnable() {
            @Override
            public void run() {
                User loginuser = MyLoginModel.login(mobile, password);

                Message message = mHandler.obtainMessage();
                message.obj = loginuser;
                mHandler.sendMessage(message);
            }
        }).start();
    }
}

myLoginModel

public class MyLoginModel {
    //网络请求gson解析login方法
    public static User login(String mobile, String password){
        String loginData = MyConnecUtils.getString("http://www.zhaoapi.cn/user/login?mobile="
                +mobile+"&password="+password);
        Gson gson = new Gson();
        User user = gson.fromJson(loginData, User.class);
        return  user;
    }

}

BasicLogin

public interface BasicLogin {
       //写回调方法<loginDataCallBack>
       void callBack(User data, Context context);
}