如何在Android中的活动之间使用EventBus

时间:2018-12-14 10:47:36

标签: java android greenrobot-eventbus-3.0

在我的应用程序中,我有 2 activities
活动A 活动B
进入活动B ,我有dialog,并且当用户点击此dialog的按钮之一时,我希望将调用方法插入活动A
我编写了以下代码,但是在活动A 中单击dialog按钮时未调用方法。

活动B对话框代码:

vipDialog = new Dialog(context);
                vipDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
                vipDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
                vipDialog.setContentView(R.layout.base_dialog);
                //Set cancellable
                vipDialog.setCancelable(false);
                //Init views
                baseDialog_logo = vipDialog.findViewById(R.id.baseDialog_logo);
                baseDialog_title = vipDialog.findViewById(R.id.baseDialog_title);
                baseDialog_desc = vipDialog.findViewById(R.id.baseDialog_desc);
                baseDialog_negativeBtn = vipDialog.findViewById(R.id.baseDialog_negativeBtn);
                baseDialog_positiveBtn = vipDialog.findViewById(R.id.baseDialog_positiveBtn);
                baseDialog_buttonsLay = vipDialog.findViewById(R.id.baseDialog_buttonsLay);
                baseDialog_cancelBtn = vipDialog.findViewById(R.id.baseDialog_cancelBtn);
                //Set weight
                baseDialog_buttonsLay.setWeightSum(2);
                baseDialog_cancelBtn.setVisibility(View.GONE);
                //Set logo
                baseDialog_logo.setImageDrawable(ContextCompat.getDrawable(context, R.drawable.dialog_vip_logo));
                //Set text
                baseDialog_title.setText(getString(R.string.trialTitle));
                baseDialog_desc.setText(getString(R.string.trialDesc));
                baseDialog_positiveBtn.setText(getString(R.string.buyVip));
                baseDialog_negativeBtn.setText(getString(R.string.detailSeeAdv));
                //Set click listeners
                baseDialog_positiveBtn.setOnClickListener(v -> {
                    EventBus.getDefault().post(new BuyPremiumUserEvent(true));
                    finish();
                });
                baseDialog_negativeBtn.setOnClickListener(v -> {
                    loadFullPageAdv(getViewContext(), BuildConfig.fullPageDetailApiKey, TapsellAdRequestOptions.CACHE_TYPE_STREAMED);
                });
                vipDialog.show();

活动A代码:

@Override
protected void onStart() {
    super.onStart();
    EventBus.getDefault().register(this);

}

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

@Subscribe(threadMode = ThreadMode.MAIN)
public void onBuyPremium(final BuyPremiumUserEvent event) {
    clickedOnBuyPremium = event.isClickOnBuyPremium();
    initBazaarUserRegistered();
    Log.e("paymentLog", "Clicked");
}

单击对话框时,不要在日志中显示Log.e("paymentLog", "Clicked");

我该如何解决?

1 个答案:

答案 0 :(得分:0)

您可能需要使用粘性事件。自Activity A启动Activity B之后,它一直在后台运行,无法再接收任何事件。

将其放入您的Activity A而不是EventBus.getDefault().register(this)

@Override
public void onStart() {
  super.onStart();
  EventBus.getDefault().registerSticky(this);
}

您还需要发布这样的粘性事件

EventBus.getDefault().postSticky(new BuyPremiumUserEvent(true));

然后在您的订阅服务器中,像这样将sticky添加为true

@Subscribe(sticky = true, threadMode = ThreadMode.MAIN)
  public void onBuyPremium(final BuyPremiumUserEvent event) {
  clickedOnBuyPremium = event.isClickOnBuyPremium();
  initBazaarUserRegistered();
  Log.e("paymentLog", "Clicked");
}

以下是Sticky Events

的文档