public interface ICard {
    void onStartLoading();//开始加载

    void onLoading();//加载中

    void onLoadingDone(Card card);//加载成功

}

public class Card {
    public Card(String name, String tel) {
        this.name = name;
        this.tel = tel;
    }

    public String name;
    public String tel;


    public String getName() {
        return name;
    }


    public String getTel() {
        return tel;
    }


    public String toString() {
        return "  name:" + name + "  tel:" + tel;
    }
}

public class CardParsenter {
    private String TAG = "CardParsenter";
    private ICard iCard;


    public CardParsenter(ICard iCard) {
        this.iCard = iCard;
    }

    public void getCard() {
        iCard.onLoadingDone(new Card("小明", "12345678"));
    }

    public void setCard(Card card) {
        Log.i(TAG, card.toString());
    }


}

public class UserActivity extends AppCompatActivity implements ICard {

    public CardParsenter cardParsenter;
    public EditText nameET, telET;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        cardParsenter = new CardParsenter(this);
        nameET = (EditText) findViewById(R.id.nameET);
        telET = (EditText) findViewById(R.id.telET);
    }

    public void click(View view) {
        switch (view.getId()) {
            case R.id.setBT:
                cardParsenter.setCard(new Card(nameET.getText().toString(), telET.getText().toString()));
                break;
            case R.id.getBT:
                cardParsenter.getCard();
                break;
        }
    }


    @Override
    public void onStartLoading() {

    }

    @Override
    public void onLoading() {

    }

    @Override
    public void onLoadingDone(Card card) {
        nameET.setText(card.getName());
        telET.setText(card.getTel());
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".view.UserActivity"
    tools:showIn="@layout/activity_main">


    <EditText
        android:id="@+id/nameET"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:hint="nameET"
        android:textSize="20sp" />

    <EditText
        android:id="@+id/telET"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/nameET"
        android:hint="tel"
        android:textSize="20sp" />

    <Button
        android:id="@+id/setBT"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/telET"
        android:onClick="click"
        android:text="set"
        android:textSize="20sp" />


    <Button
        android:id="@+id/getBT"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/telET"
        android:layout_toEndOf="@+id/setBT"
        android:onClick="click"
        android:text="get"
        android:textSize="20sp" />

</RelativeLayout>

四、总结

MVC有个缺点就是View层和model层耦合在一起，造成了Activity做控制的同时也做View层的事(比如设置监听，设置动画、初始化控件等...)。MVP在MVC的基础上分离了View层和model层，然后用parsenter控制模型，得到结果后通知View刷新UI，从而避免耦合。