public class MessageEvent {
 ...
}

EventBus.getDefault().register(this);

@Subscribe(threadMode = ThreadMode.MAIN)
public void XXX(MessageEvent messageEvent) {
 ...
}

@Override
 protected void onDestroy() {
  EventBus.getDefault().unregister(this);
  super.onDestroy();
 }

public class MessageEvent {

 public final String uname;
 public final String upass;

 public MessageEvent(String name,String pass) {
  this.uname = name;
  this.upass = pass;
 }
}

public class MainActivity extends AppCompatActivity {

 private String username;
 private String password;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);


  final TextInputLayout usernameWrapper = (TextInputLayout) findViewById(R.id.usernameWrapper);
  final TextInputLayout passwordWrapper = (TextInputLayout) findViewById(R.id.passwordWrapper);
  Button btn = (Button) findViewById(R.id.btn);
  usernameWrapper.setHint("请输入账号");
  passwordWrapper.setHint("请输入密码");
  //点击事件
  btn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    hideKeyboard();
    username = usernameWrapper.getEditText().getText().toString();
    password = passwordWrapper.getEditText().getText().toString();
    if (!validateEmail(username)) {
     usernameWrapper.setError("Not a valid email address!");
    } else if (!validatePassword(password)) {
     passwordWrapper.setError("Not a valid password!");
    } else {
     usernameWrapper.setErrorEnabled(false);
     passwordWrapper.setErrorEnabled(false);
     //发送粘性事件//////////////////
     EventBus.getDefault().postSticky(new MessageEvent(username,password));
     startActivity(new Intent(MainActivity.this,SecondActivity.class));

    }

   }
  });
 }

 private void hideKeyboard() {
  View view = getCurrentFocus();
  if (view != null) {
   ((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).
     hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
  }
 }

 //邮箱验证
 public boolean validateEmail(String email) {
  return email.length() > 5;
 }
 // 密码验证
 public boolean validatePassword(String password) {
  return password.length() > 5;
 }

}

public class SecondActivity extends AppCompatActivity {

 private TextView name,pass;
 private Button button;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_second);
  name= (TextView) findViewById(R.id.uname);
  pass= (TextView) findViewById(R.id.upass);
  button= (Button) findViewById(R.id.button);

  button.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    //注册EventBus
    EventBus.getDefault().register(SecondActivity.this);
   }
  });

 }
 //事件订阅者处理事件
 @Subscribe(threadMode = ThreadMode.POSTING,sticky = true)
 public void onUserEvent(MessageEvent event) {
  name.setText("用户名:" + event.uname);
  pass.setText("用户名:" + event.upass);

 }

 //取消注册
 @Override
 protected void onDestroy() {
  EventBus.getDefault().unregister(this);
  super.onDestroy();
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_main"
 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"
 android:orientation="vertical"
 >
 <RelativeLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_weight="0.5"
  android:orientation="vertical">

  <TextView
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_centerInParent="true"
   android:gravity="center"
   android:text="Welcome"
   android:textSize="30sp"
   android:textColor="#333333"/>

 </RelativeLayout>


 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_weight="0.5"
  android:orientation="vertical">

  <android.support.design.widget.TextInputLayout
   android:id="@+id/usernameWrapper"
   android:layout_width="match_parent"
   android:layout_height="wrap_content">

   <EditText
    android:id="@+id/username"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textEmailAddress"
    android:hint="Username"/>

  </android.support.design.widget.TextInputLayout>

  <android.support.design.widget.TextInputLayout
   android:id="@+id/passwordWrapper"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_below="@id/usernameWrapper"
   android:layout_marginTop="4dp">

   <EditText
    android:id="@+id/password"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textPassword"
    android:hint="Password"/>

  </android.support.design.widget.TextInputLayout>

  <Button
   android:id="@+id/btn"
   android:layout_marginTop="4dp"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:text="Login"/>

 </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_second"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">

 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="60dp"
  android:gravity="center">
  <Button
   android:id="@+id/button"
   android:layout_width="100dp"
   android:layout_height="match_parent"
   android:text="接收数据" />

 </LinearLayout>

 <LinearLayout
  android:orientation="horizontal"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/uname"
   android:layout_weight="1" />

  <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/upass"
   android:layout_weight="1" />
 </LinearLayout>
</LinearLayout>