CODEWITHSUNDEEP
androidandroid-tabhosttabwidgetdivider
Krishna Shrestha
Krishna Shrestha

Reputation: 1662

tabwidget divder in tabwidget disappear when tabwidget background is set from code?

divider in tabWidget is working fine but when background of tab widget is set like 

tabHost.getTabWidget().getChildTabViewAt(tabId).setBackgroundResource(R.drawable.tab_indicator);

problem is how to set divider in tab widget after setting background though i used 

tabhost.getTabWidget().setDividerDrawable(R.drawable.tab_widget_divider);

is does not work for multiple tab.

Upvotes: 1

Views: 5197

Answers (1)

Adam Toth
Adam Toth

Reputation: 951

There may be multiple reasons for the dividers not showing up...

1. setDividerDrawable() must be used before you add the tabs to the tabHost to work.

2. By default there's are -2(left), -2(right) margins set to each tabindicator's View...

By default the system is using 9-patch drawables for tabWidget backgrounds with at least 2 pixels left transparent(or semi-transparent for shadow-effect) to the left and the right side.

my custom tab example

1. demonstration

original system 9-path drawable in android 2.3.3 (selected)enter image description here

2. Stock 9-path drawables for tab widget background. You can use these for experimenting

If you don't wan't to use 9-path drawables... you can set the margins to 0 to prevent the tab views overlapping your divider. Here's the code:

    View v;
    int count = tw.getTabCount();
    for (int i = 0; i < count; i++) {
        v = tw.getChildTabViewAt(i);
        v.setBackgroundResource(R.drawable.bg_tab);
        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
        params.setMargins(0, 0, 0, 0);
    }

Upvotes: 14

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