EventBus跳转传值

一，导入依赖

compile 'org.greenrobot:eventbus:3.1.1'

              这里用到一个控件

TextInputLayout

，可以使页面变得美观，也需要导入依赖

compile 'com.android.support:design:23.3.0'

二，布局文件

       1，第一个页面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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>

      2，第二个页面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    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>

三，定义消息事件类，有几个参数写几个参数

    

public class MenegerEvent {
    //定义消息事件类
    public final String name;
    public final String pwd;

    public MenegerEvent(String name, String pwd) {
        this.name = name;
        this.pwd = pwd;
    }
}

四，Activity

//注册和取消订阅事件
public class Main2Activity extends AppCompatActivity {
    private TextView name,pass;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        //找到控件
        name= findViewById(R.id.uname);
        pass= findViewById(R.id.upass);
        button= findViewById(R.id.button);
        //点击事件
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //注册EventBus
                EventBus.getDefault().register(Main2Activity.this);
            }
        });
    }
    //事件订阅者处理事件
    @Subscribe(threadMode = ThreadMode.POSTING,sticky = true)
    public void onUserEvent(MenegerEvent event) {
        name.setText("用户名:" + event.name);
        pass.setText("用户名:" + event.pwd);

    }

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

五，Avtivity2

//注册和取消订阅事件
public class Main2Activity extends AppCompatActivity {
    private TextView name,pass;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        //找到控件
        name= findViewById(R.id.uname);
        pass= findViewById(R.id.upass);
        button= findViewById(R.id.button);
        //点击事件
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //注册EventBus
                EventBus.getDefault().register(Main2Activity.this);
            }
        });
    }
    //事件订阅者处理事件
    @Subscribe(threadMode = ThreadMode.POSTING,sticky = true)
    public void onUserEvent(MenegerEvent event) {
        name.setText("用户名:" + event.name);
        pass.setText("用户名:" + event.pwd);

    }

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