public class MainActivity extends AppCompatActivity implements View.OnClickListener, Mvp.fff {  private EditText mUsername;  private EditText mPassword;  private Button login;  private ProgressDialog mProgressDialog;  private Mvp mMvp;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initView();     mMvp = new Mvp(this);  }  private void initView() {    mUsername = (EditText) findViewById(R.id.username);    mPassword = (EditText) findViewById(R.id.password);    login = (Button) findViewById(R.id.login);    login.setOnClickListener(this);    //動態的創建一個進度條    mProgressDialog = new ProgressDialog(this);  }  @Override  public void onClick(View view) {    switch (view.getId()){      case R.id.login:        String user = mUsername.getText().toString();        String pass = mPassword.getText().toString();        final User users = new User();        users.username=user;        users.password=pass;        Boolean empty = mMvp.isEmpty(users);        if (empty){          mProgressDialog.show();          mMvp.isLogin(users);        }else {          Toast.makeText(MainActivity.this, "輸入不能為空", Toast.LENGTH_SHORT).show();          return;        }        break;    }  }  @Override  public void success() {    runOnUiThread(new Runnable() {      @Override      public void run() {        mProgressDialog.dismiss();        Toast.makeText(MainActivity.this, "歡迎回來,思密達", Toast.LENGTH_SHORT).show();      }    });  }  @Override  public void doil() {    runOnUiThread(new Runnable() {      @Override      public void run() {        mProgressDialog.dismiss();        Toast.makeText(MainActivity.this, "登錄失敗,賬號密碼有問題", Toast.LENGTH_SHORT).show();      }    });  }  @Override  protected void onDestroy() {    super.onDestroy();    mMvp=null;  }}

public class UserLogin {  //MVC Controller層  public boolean login(User users){    SystemClock.sleep(1000);    if ("frq".equals(users.username)&&"frq".equals(users.password)){      return true;    }else {      return false;    }  }}

public class Mvp {  //MVP Precenter層  public Mvp(fff fff) {    mFff = fff;  }  public Boolean isEmpty(User users){    if (TextUtils.isEmpty(users.username) || TextUtils.isEmpty(users.password)){      return false;    }else {      return true;    }  }  public void isLogin(final User users){    new Thread(){      @Override      public void run() {        UserLogin login = new UserLogin();        boolean b = login.login(users);        if (b){          mFff.success();        }else {          mFff.doil();        }      }    }.start();  }  public interface fff{    void success();    void doil();  }  private fff mFff;}===========================================public class Precenter {  public Precenter(fff fff) {    mFff = fff;  }  public void As(String urlString){    new AsyncTask<String, Void, ArrayList<FirstBean.ResultBean>>() {      @Override      protected ArrayList<FirstBean.ResultBean> doInBackground(String... strings) {        String s = new HttpUrl().toString(strings[0]); //調用外部類        FirstBean firstBean = new Gson().fromJson(s, FirstBean.class); //gson解析        if (firstBean!=null){          return (ArrayList<FirstBean.ResultBean>) firstBean.getResult();        }        return null;      }      @Override      protected void onPostExecute(ArrayList<FirstBean.ResultBean> resultBeans) {        super.onPostExecute(resultBeans);        if (resultBeans!=null){          mFff.success(resultBeans);        }else {          mFff.bai();        }      }    }.execute(urlString);  }  public interface fff{    void success(ArrayList<FirstBean.ResultBean> resultBeans);    void bai();  };  private fff mFff;}