【Android】Android Support Design TabLayout: Gravity Center and Mode Scrollable

簡單來說，問題是

設定tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

手機直立顯示，Tab在畫面上看起來很正常，超出螢幕的寬度，可以用scroolable解。

但

當手機橫置顯示時，Tab的總寬度小於螢幕寬度太多，造成視覺上很奇怪，如何解？

答案：

As I didn't find why does this behaviour happen I have used the following code:

float myTabLayoutSize = 360;
if (DeviceInfo.getWidthDP(this) >= myTabLayoutSize ){
    tabLayout.setTabMode(TabLayout.MODE_FIXED);
} else {
    tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
}

Basically, I have to calculate manually the width of my tabLayout and then I set the Tab Mode depending on if the tabLayout fits in the device or not.

The reason why I get the size of the layout manually is because not all the tabs have the same width in Scrollable mode, and this could provoke that some names use 2 lines as it happened to me in the example.

在不同顯示下，使用不同的顯示方式。

上述解答，應需加

app:tabGravity="fill"

才可以達到想要的效果。