1.配置build.gradle（或直接导入jar包）

在build.gradle中导入以下配置

例如：

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.squareup:otto:1.3.5'
}       

2.创建一个单例的BusProvider（名字貌似可以自定义，不过要让自己和别人看的懂）

public final class BusProvider {
private static final Bus BUS = new Bus();

public static Bus getInstance() {
    return BUS;
}

private BusProvider() {
    // No instances.
}

3.在需要使用的地方注册它，记得不用的时候取消注册

@Override
public void onStart() {
    super.onStart();
    BusProvider.getInstance().register(this);
}

@Override
public void onDestroy() {
    super.onDestroy();
    BusProvider.getInstance().unregister(this);
}

4.创建一个xxxEvent类，里面包含你要操作的数据类型

例如：

    public class MessageEvent {

    public String message;

    public MessageEvent(String message) {
        this.message = message;
    }
    
    public String getMessage() {
        return message;
    }
  }

5.在需要发送的消息的地方发送

 button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            BusProvider.getInstance().post(dothing());
        }
    });

6.写一个产生事件的公有的返回值为xxxEvent的方法并加上注解：@Produce

@Produce
public MessageEvent dothing() {
    return new MessageEvent(str.getText().toString());
}

7.在需要订阅的地方，也就是需要传值得地方写上一个公共方法并加上注解@Subscribe

@Subscribe
public void onEventMainThread(MessageEvent event) {
    text.setText(event.message);

}

在这个方法中处理传过来的值

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附上源代码：

Activity代码如下

    public class MainActivity extends AppCompatActivity {

    private EditText str;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        str = (EditText) findViewById(R.id.str);
        button = (Button) findViewById(R.id.set);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                BusProvider.getInstance().post(dothing());
            }
        });
    }


    @Produce
    public MessageEvent dothing() {
        return new MessageEvent(str.getText().toString());
    }

    @Override
    public void onStart() {
        super.onStart();
        BusProvider.getInstance().register(this);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        BusProvider.getInstance().unregister(this);
    }
}

Fragment代码如下

    public class mainFragment extends Fragment {
    private TextView text;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.mian, container, false);
        text = (TextView) view.findViewById(R.id.text);
        return view;
    }

    @Subscribe
    public void onEventMainThread(MessageEvent event) {
        text.setText(event.message);
    }

    @Override
    public void onStart() {
        super.onStart();
        BusProvider.getInstance().register(this);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        BusProvider.getInstance().unregister(this);
    }
}

获取事物实例代码如下：

    public final class BusProvider {
    private static final Bus BUS = new Bus();

    public static Bus getInstance() {
        return BUS;
    }

    private BusProvider() {
        // No instances.
    }
}

事件类代码如下

public class MessageEvent {

public String message;

public MessageEvent(String message) {
    this.message = message;
}

public String getMessage() {
    return message;
}

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