50个Android开发技巧(20 使用MVP模式)

  public class UserBean {
       private String mFirstName ;
       private String mLastName ;
       public UserBean (String firstName, String lastName) {
             this .mFirstName = firstName;
             this .mLastName = lastName;
       }
       public String getFirstName() {
             return mFirstName ;
       }
       public String getLastName() {
             return mLastName ;
       }
}

public interface IUserView {
       int getID();
       String getFristName();
       String getLastName();
       void setFirstName (String firstName);
       void setLastName (String lastName);
}

public interface IUserModel {
       void setID (int id);
       void setFirstName (String firstName);
       void setLastName (String lastName);
       int getID();
       UserBean load (int id);//通过id读取user信息,返回一个UserBean
}

public class UserPresenter {
       private IUserView mUserView ;
       private IUserModel mUserModel ;

       public UserPresenter (IUserView view) {
             mUserView = view;
             mUserModel = new UserModel ();
       }

       public void saveUser( int id , String firstName , String lastName) {
             mUserModel .setID (id );
             mUserModel .setFirstName (firstName );
             mUserModel .setLastName (lastName );
       }

       public void loadUser( int id ) {
             UserBean user = mUserModel .load (id );
             mUserrView .setFirstName (user .getFirstName ());//通过调用IUserView的方法来更新显示
             mUserView .setLastName (user .getLastName ());
       }
}

public class UserActivity extends Activity implements OnClickListener ,
             IUserView {

       private EditText mFirstNameEditText , mLastNameEditText , mIdEditText ;
       private Button mSaveButton , mLoadButton ;
       private UserPresenter mUserPresenter ;

@Override
       public void onClick(View v) {
             // TODO Auto-generated method stub
             switch ( v. getId()) {
             case R .id .saveButton :
                   mUserPresenter .saveUser (getID (), getFristName (),
                               getLastName ());
                   break ;
             case R .id .loadButton :
                   mUserPresenter .loadUser (getID ());
                   break ;
             default :
                   break ;
             }
       }