PagerTitleStrip不会在第一个显示页面上显示标题，标题仅在刷到另一个页面后绘制

Question

Issue: After updating to appcompat-v7:23.0.0, both PagerTabStrip and PagerTitleStrip do not show titles on first display page (fig1), the titles are only drawn after swiping to another page (fig2).

Library used : appcompat-v7

Version used: 23.0.0

Theme used: Theme.AppCompat.Light.DarkActionBar,Theme.AppCompat.Light.NoActionBar

Devices/Android versions reproduced on: Nexus 5/ Android M Developer Preview 2

Steps to reproduce:

• 1. Create a new sample project, minSdk version doesn't matter.
• 2. Choose tabbed activity when asked to add an activity.
• 3. Add a PagerTabStrip layout inside activity_main.xml such as below:

   <android.support.v4.view.PagerTabStrip android:id="@+id/title_strip" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="top" android:paddingBottom="4dp" android:paddingTop="4dp" android:textColor="@android:color/background_dark" /> 

  4. Run the app

What to expect: titles on the viewpager tab strip should be visible What happened : The titles are not drawn (fig1) unless swiped to another page (fig2)

Here the link of the issue ...

https://code.google.com/p/android/issues/detail?id=183127

Answer 1

I was having the same problem. This has been fixed in version 23.1.0. Update the library, clean the project and it should work.

Answer 2

try this..

protected override void OnLayout (bool changed, int lValue, int tValue, int rValue, int bValue)
{
    for (int i = 0; i < ChildCount; i++) {
        if (GetChildAt (i).GetType () == typeof(TextView)) {
            ((TextView)GetChildAt (i)).Measure (MeasuredWidth, MeasuredHeight);
        }
    }
    base.OnLayout (changed, lValue, tValue, rValue, bValue);
}