Make same text and header color at least slightly visible

app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java

@@ -7,7 +7,6 @@ import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v4.content.ContextCompat;
 import android.support.v4.graphics.ColorUtils;
 import android.support.v4.graphics.drawable.DrawableCompat;
 import android.support.v4.widget.TextViewCompat;
@@ -200,6 +199,9 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         // Make notification area light if dark icons are needed
         window.getDecorView().setSystemUiVisibility(backgroundNeedsDarkIcons ? View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR : 0);
 
+        // Set shadow colour of store text so even same color on same color would be readable
+        storeName.setShadowLayer(1, 1, 1, backgroundNeedsDarkIcons ? Color.BLACK : Color.WHITE);
+
         if(format != null)
         {
             findViewById(R.id.barcode).setVisibility(View.VISIBLE);