fragment - Android proguard back arrow not displayed (although working in debug APK) -

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i have activity containing fragment shows list of settings. when clicking on list item, fragment transaction performed , detail fragment displayed. also, hamburger menu item transformed arrow (home up).

in debug apk, works perfectly. however, in release version, hamburger menu not transformed arrow, stays same. when clicking hamburger menu button detail fragment, fragment dismissed expected. problem display of arrow not shown in release version using proguard.

i found solution. since using drawerarrowdrawable, have include v7 support graphics library in proguard file.

-keep class android.support.v7.graphics.** { *; }

now arrow drawable displayed.


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