Question

我的程序中有5个标签片段，我想将数据从我的工具栏按钮传递到5个标签片段，但问题是当我点击我的工具栏按钮时它只传递给3个片段，任何人都有想法解决这个问题

主要活动

这是我在MainActivity中的onclick功能

timestamp

list_fragment2

这是我在MainActivity

上点击切换按钮后收到数据的方式

    public void editpage( View view) {

    ToggleButton etMessage = (ToggleButton) findViewById(R.id.toggleButton);
    Events.ActivityFragmentMessage activityFragmentMessageEvent = new Events.ActivityFragmentMessage(String.valueOf(etMessage.getText()));
    Events.ActivityFragmentMessage2 activityFragmentMessageEvent2 = new Events.ActivityFragmentMessage2(String.valueOf(etMessage.getText()));
    Events.ActivityFragmentMessage3 activityFragmentMessageEvent3 = new Events.ActivityFragmentMessage3(String.valueOf(etMessage.getText()));
    Events.ActivityFragmentMessage4 activityFragmentMessageEvent4 = new Events.ActivityFragmentMessage4(String.valueOf(etMessage.getText()));
    Events.ActivityFragmentMessage5 activityFragmentMessageEvent5 = new Events.ActivityFragmentMessage5(String.valueOf(etMessage.getText()));
    GlobalBus.getBus().post(activityFragmentMessageEvent);
    GlobalBus.getBus().post(activityFragmentMessageEvent2);
    GlobalBus.getBus().post(activityFragmentMessageEvent3);
    GlobalBus.getBus().post(activityFragmentMessageEvent4);
    GlobalBus.getBus().post(activityFragmentMessageEvent5);

}

orderlist_fragment

@Override
public void onStart() {
    super.onStart();
    GlobalBus.getBus().register(this);
}
@Subscribe
public void getMessage(Events.ActivityFragmentMessage activityFragmentMessage) {

    messageView2 = (TextView) getView().findViewById(R.id.sum2);
    messageView2.setText(String.valueOf(activityFragmentMessage.getMessage()));
    messageView2.setText(activityFragmentMessage.getMessage());
    i = messageView2.getText().toString();
    result = Integer.parseInt(i);
    if (result == 1) {
        Nsum[0]++;
        editor.putInt(PREFS_KEY,Nsum[0]);
        editor.commit();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.detach(list_fragment2.this).attach(list_fragment2.this).commit();

    }else if (result ==0){
        editor.remove(PREFS_KEY);
        editor.commit();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.detach(list_fragment2.this).attach(list_fragment2.this).commit();
    }

}
@Override
public void onDestroyView() {
    super.onDestroyView();
    GlobalBus.getBus().unregister(this);
}

Tab4_fragment

 @Override
public void onStart() {
    super.onStart();
    GlobalBus.getBus().register(this);
}
@Subscribe
public void getMessage3(Events.ActivityFragmentMessage3 activityFragmentMessage3) {

    messageView3 = (TextView) getView().findViewById(R.id.sum3);
    messageView3.setText(String.valueOf(activityFragmentMessage3.getMessage3()));
    messageView3.setText(activityFragmentMessage3.getMessage3());
    i = messageView3.getText().toString();
    result = Integer.parseInt(i);
    if (result == 1) {
        Nsum[0]++;
        editor.putInt(PREFS_KEY,Nsum[0]);
        editor.commit();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.detach(orderlist_fragment.this).attach(orderlist_fragment.this).commit();

    }else if (result ==0){
        editor.remove(PREFS_KEY);
        editor.commit();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.detach(orderlist_fragment.this).attach(orderlist_fragment.this).commit();
    }

}
@Override
public void onDestroyView() {
    super.onDestroyView();
    GlobalBus.getBus().unregister(this);
}

Answer 1

这是因为尚未创建片段4和5。将 setOffscreenPageLimit（5）添加到viewPager实例中。它会将所有5个片段保留在内存中，而不是使用延迟加载机制。

官方文档链接setOffscreenPageLimit

设置应保留在页面两侧的页数处于空闲状态的视图层次结构中的当前页面。页面超出此范围在需要时，将从适配器重新创建限制。

Android事件总线将数据从活动传递到选项卡片段

1 个答案: