TabHost不显示在开始内容 [英] TabHost not showing contents in the beginning

问题描述

我有两个选项卡的TabActivity。活动的布置如下：

I have a TabActivity with two tabs. the layout of the activity is as follows:

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:orientation="vertical"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:padding="5dp">

    <TabWidget android:id="@android:id/tabs"
        android:layout_width="fill_parent" android:layout_height="wrap_content" />
    <FrameLayout android:id="@android:id/tabcontent"
        android:layout_width="fill_parent" android:layout_height="fill_parent"
        android:padding="5dp">
        <ListView android:id="@+id/list"
            android:layout_width="fill_parent" android:layout_height="fill_parent" />

    </FrameLayout>
</LinearLayout>
</TabHost>

布局由它在setOnTabChangedListener相应填充（一个ListView的）。带馅的名单，并将其显示没有问题。

The layout consists of a ListView which is populated accordingly in setOnTabChangedListener(). no problem with filling the list and showing it.

我的问题是，在活动开始时不显示列表视图，虽然我通过ID找到它，并填充它;它更改标签后才能填充。

My problem is that the list view is not shown when the activity starts, although I find it by ID and populate it; it is only populated after I change the tabs.

和在OnCreate（..）在code是这样的：

and the code in the onCreate(..) looks like this:

l = (ListView) findViewById(R.id.list);
l.setAdapter(new CommentsAdapter(this, (JSONArray) obj));

TabSpec spec;
    spec = tabHost.newTabSpec("0").setIndicator("0",
            res.getDrawable(R.drawable.tab_recent)).setContent(
            R.id.list);
    tabHost.addTab(spec);

    spec = tabHost.newTabSpec("1").setIndicator("1",
            res.getDrawable(R.drawable.tab_pop)).setContent(
            R.id.list);
    tabHost.addTab(spec);

    tabHost.setOnTabChangedListener(new OnTabChangeListener() {

        @Override
        public void onTabChanged(String tabId) {
            // TODO Auto-generated method stub
            int tab = Integer.valueOf(tabId);
            showDialog(WAIT_DIALOG);

            switch (tab) {
            // recent
            case 0:
                //refill the list
                break;
            // popular

            case 1:
                //refill the list
                break;
            }
        }
    });

    tabHost.setCurrentTab(0);

任何提示？

推荐答案

我有一个类似的问题。我注意到的是，如果你做

I had a similar issue. What I noticed is that if you do

tabHost.setCurrentTab(0);

然后 onTabChanged 不会被触发。但是，如果你做

then onTabChanged is not triggered. BUT, if you do

tabHost.setCurrentTab(1);

那么它就是，在列表中显示，所有它的罚款。按照之所以出现这种情况，它仍然是一个有点谜给我。

then it is, the list shows up and all it's fine. As per why this happens, it remains a bit of a mistery to me.

使用此作弊，开始第一个选项卡上的应用：
在OnCreate（）中，您已经创建后，标签先打电话：
tabHost.setCurrentTab（1）;
然后调用：
tabHost.setCurrentTab（0）;

Use this cheat to start your app on the first tab: in onCreate(), after you've created the tabs call first: tabHost.setCurrentTab(1); Then call: tabHost.setCurrentTab(0);

这篇关于TabHost不显示在开始内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！