While working with dynamically generated Buttons styled via drawable I struggled to get android:state_pressed to work. As the states of the Button changed the styles were not being applied (state_pressed="true", state_focused="true" etc).
Overview of the Button
I was constructing the Button programmatically providing a style as a constructor argument:
private Button buildButton() { @StyleRes int style = R.style.ButtonStyle; Button button = new Button(context, null, 0, style); // ... set button text, listener etc. return button; } |
The style would then apply the drawable where my states were malfunctioning:
<style name="ButtonStyle"> <!-- Apply colors, textSize etc --> <item name="android:background">@drawable/my_button</item> </style> |
Finally here is the Button with a custom border defined via this Drawable (my_button.xml).
<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_focused="true"> <shape android:shape="rectangle"> <corners android:radius="8dip"/> <stroke android:width="1dip" android:color="@color/green"/> <solid android:color="@color/white"/> </shape> </item> <item android:state_pressed="false"> <shape android:shape="rectangle"> <corners android:radius="8dip" /> <stroke android:width="1dip" android:color="@color/white"/> <gradient android:angle="-90"/> </shape> </item> <item android:state_pressed="true"> <shape android:shape="rectangle"> <corners android:radius="8dip"/> <stroke android:width="1dip" android:color="@color/green"/> <gradient android:angle="-90"/> <solid android:color="@color/green"/> </shape> </item> </selector> |
Solution: Ensure the button is clickable
Turns out these styles will not work if the Button flag CLICKABLE isn’t set. I assume this is set automatically by Android when a Button is constructed via xml. I was able to resolve this issue by simply setting isClickable(true) in my buildButton() method above:
<pre lang="java"> private Button buildButton() { @StyleRes int style = R.style.ButtonStyle; Button button = new Button(context, null, 0, style); // Fix state_pressed issue: button.setClickable(true); // ... set button text, listener etc. return button; } |