build.gradle中添加引用

compile 'org.greenrobot:eventbus:3.0.0'

基本代碼

SecondActivity 執(zhí)行事件發(fā)布

public class SecondActivity extends AppCompatActivity implements View.OnClickListener {
  private  Button btnMain;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        btnMain = (Button) findViewById(R.id.btnMain);
        btnMain.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnMain:
                EventBus.getDefault().post(new MainMessage("傳遞信息：aikaifa"));//事件發(fā)布
                //此處可用EventBus.getDefault().post(String)，方便在訂閱處（@Subscriber）進(jìn)行判斷，可自定義static final String類型，自定義類似注冊(cè)登錄等的判斷，方便做判斷
                finish();
                break;
        }
    }
}

MainActivity執(zhí)行事件訂閱

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btnMain, btnBackground, btnAsync, btnPosting, btn1;
    private TextView tv_desc;

    private String TAG = MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
//必須進(jìn)行EventBus注冊(cè)
        EventBus.getDefault().register(this);
        initView();
        initClick();

    }

    /**
     * 按鈕點(diǎn)擊
     */
    private void initClick() {
        btnMain.setOnClickListener(this);
        btnBackground.setOnClickListener(this);
        btnAsync.setOnClickListener(this);
        btnPosting.setOnClickListener(this);
        btn1.setOnClickListener(this);
    }

    /**
     * 初始化View
     */
    private void initView() {

        btnMain = (Button) findViewById(R.id.btnMain);
        btnBackground = (Button) findViewById(R.id.btnBackground);
        btnAsync = (Button) findViewById(R.id.btnAsync);
        btnPosting = (Button) findViewById(R.id.btnPosting);

        btn1 = (Button) findViewById(R.id.btn1);
        tv_desc = (TextView) findViewById(R.id.tv_desc);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
//必須執(zhí)行EventBus取消注冊(cè)操作
        EventBus.getDefault().unregister(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnMain:
                EventBus.getDefault().post(new MainMessage("MainMessage"));
                break;
            case R.id.btnBackground:
                EventBus.getDefault().post(new BackgroundMessage("BackgroundMessage"));
                break;
            case R.id.btnAsync:
                EventBus.getDefault().post(new AsyncMessage("AsyncMessage"));
                break;
            case R.id.btnPosting:
                EventBus.getDefault().post(new PostingMessage("PostingMessage"));
                break;
            case R.id.btn1:
                Intent intent = new Intent(MainActivity.this, SecondActivity.class);
                startActivity(intent);
                break;

        }
    }

//以下必須在方法前進(jìn)行注解@Subscribe
/**  @Subscribe
 *   public void onMainEventBus(String msg) {
 *      //可以通過msg進(jìn)行判斷
 *      if(msg.equals(**)){
 *       //進(jìn)行判斷，判斷是登錄還是注冊(cè)還是其他自定義操作
 *      }
 *      
 *   }
 **/

    //主線程中執(zhí)行
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void onMainEventBus(MainMessage msg) {
        Log.e(TAG, msg.getMessage());
        tv_desc.setText(msg.getMessage());
    }

    //后臺(tái)線程
    @Subscribe(threadMode = ThreadMode.BACKGROUND)
    public void onBackgroundEventBus(BackgroundMessage msg) {
        Log.e(TAG, msg.getMessage());
    }

    //異步線程
    @Subscribe(threadMode = ThreadMode.ASYNC)
    public void onAsyncEventBus(AsyncMessage msg) {
        Log.e(TAG, msg.getMessage());

    }

    //默認(rèn)情況，和發(fā)送事件在同一個(gè)線程
    @Subscribe(threadMode = ThreadMode.POSTING)
    public void onPostEventBus(PostingMessage msg) {

        Log.e(TAG, msg.getMessage());
    }
}