Dotted line is actually not dotted when app is running on real Android device

Question

in my app I use XML defined vertical dotted line.

<?xml version="1.0" encoding="utf-8"?> <rotate xmlns:android="http://schemas.android.com/apk/res/android"     android:fromDegrees="90"     android:toDegrees="90"> <shape      android:shape="line">     <stroke          android:width="1dp"         android:color="@color/light_gray"         android:dashWidth="2dp"         android:dashGap="4dp"         /> </shape> 

When I am nitpicking my layout in Android Studio, the line is rendered properly dotted, as it should, but problem comes out when I run the app on real device. The line is just solid with no gaps..Do you know where could be the problem? I tried many different devices including those running latest 4.3 Android..It look everywhere the same:/

Answer 1

This is most likely related to hardware acceleration: Dashed lines are not supported in GL mode.

Its documented here: https://code.google.com/p/android/issues/detail?id=29944

Turn off your HW-acceleration in your AndroidManifest.xml like this:

android:hardwareAccelerated="false" 

or:

myView.setLayerType(View.LAYER_TYPE_SOFTWARE, null)  

For more information how to use first solution: http://developer.android.com/guide/topics/graphics/hardware-accel.html