showing black background in api 21

[mohamadk]

hi albert thanks for this very nice lib.
i use it in my app but in api 21 polygone shows black background or transparent even if have parent with colored background.

this is my code

 PolygonImageView view = new PolygonImageView(getApplicationContext());
 view.setImageResource(R.color.info_MainBackColor);

 view.addBorderResource(5, R.color.info_MainBackColor);
 view.setCornerRadius(2);
 view.setVertices(6);
 imageLayout.addView(view);

this is my layout

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/mainlay"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="@color/amber_600"
 RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mainlay"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/amber_600"
 >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

           <RelativeLayout
        android:id="@+id/imageLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="30dp">
</RelativeLayout>
</LinearLayout>

[AlbertGrobas]

Sorry for no answering you before!
I'll take a look soon, I promise.

Thank you!

[sundyli]

I also encountered this problem, how should solve?

[sundyli]

[mathieuedet]

I encountered this problem too. I don't know if you find solution but I think the problem is when layout size, or visibility change...

EDIT : Finally, I solved this by replacing :
setLayerType(View.LAYER_TYPE_SOFTWARE, null);

by

setLayerType(View.LAYER_TYPE_HARDWARE, null);

in PolygonImageView.java in init() method

I hope it will help someone :D

[abiemann]

that setLayerType() will disable hardware acceleration for the view.
More info: https://developer.android.com/guide/topics/graphics/hardware-accel.html#determining

(could be useful for Albert to research a fix)