MVP框架搭建
16lz
2021-01-23
MVP学过Android的至少应该略知一二，废话不说，直接上代码
View层
public abstract class BaseView extends AppCompatActivity { protected P p; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); p = getPresenter(); // 绑定view p.bindView(this); } // 让P层做什么需求 public abstract CONTRACT getContract(); // 从子类中获取具体的Persenter public abstract P getPresenter(); @Override protected void onDestroy() { super.onDestroy(); // 解绑View p.unBindView(); }}
Presenter层
public abstract class BasePresenter { protected M m; public BasePresenter() { this.m = getModel(); } // P层持有View层的弱引用 protected WeakReference mWeakReference; public void bindView(V v) { mWeakReference = new WeakReference(v); } public void unBindView() { if (mWeakReference != null) { mWeakReference.clear(); mWeakReference = null; System.gc(); } } // 获取View public V getView() { if (mWeakReference != null) { return mWeakReference.get(); } return null; } public abstract M getModel(); // Model层与View层协商的业务 public abstract CONTRACT getContract();} Model层
public abstract class BaseModel { protected P p; public BaseModel(P p) { this.p = p; } // Model层做的事情 public abstract CONTRACT getContract();}
案例–登录功能
约定
public interface LoginContract { interface Model { // Model层子类完成方法的具体实现 void executeLogin(String name, String pwd) throws Exception; } interface View { // 结果返回后，View层进行结果的处理 void handleResult(T t); } interface Presenter { // 请求，从View层发出的指令 void requestLogin(String name, String pwd); // 结果响应 (接收到Model层处理的结果，通知View层刷新) void responseResult(T t); }} View层
public class LoginActivity extends BaseView> { private EditText etName; private EditText etPwd; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); etName = findViewById(R.id.et_name); etPwd = findViewById(R.id.et_pwd); } @Override public LoginContract.View getContract() { return new LoginContract.View() { @Override public void handleResult(UserInfo userInfo) { if (userInfo != null) { Toast.makeText(LoginActivity.this, "登录成功" + userInfo.toString(), Toast.LENGTH_SHORT).show(); } else { Toast.makeText(LoginActivity.this, "登录失败...", Toast.LENGTH_SHORT).show(); } } }; } @Override public LoginPresenter getPresenter() { return new LoginPresenter(); } public void doLogin(View view) { String name = etName.getText().toString(); String pwd = etPwd.getText().toString(); p.getContract().requestLogin(name, pwd); }} Presenter层
public class LoginPresenter extends BasePresenter> { @Override public LoginModel getModel() { return new LoginModel(this); } @Override public LoginContract.Presenter getContract() { return new LoginContract.Presenter() { @Override public void requestLogin(String name, String pwd) { try { m.getContract().executeLogin(name, pwd); } catch (Exception e) { e.printStackTrace(); } } @Override public void responseResult(UserInfo userInfo) { getView().getContract().handleResult(userInfo); } }; }} Model层
public class LoginModel extends BaseModel { public LoginModel(LoginPresenter loginPresenter) { super(loginPresenter); } @Override public LoginContract.Model getContract() { return new LoginContract.Model() { @Override public void executeLogin(String name, String pwd) throws Exception { if (name.equals("lichaojun") && pwd.equals("123")) { p.getContract().responseResult(new UserInfo("lcj", "lcj")); } else { p.getContract().responseResult(null); } } }; }} 更多相关文章
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