I would like to create a notification icon view that looks similar to the Google+ app's notification. The difference will be that I need to be able to change the color at runtime where as the Google+ icons gray or red so I'm assuming they are using a StateListDrawable.
What is the best approach for this? I'd prefer to have the rounded clipped corners and have the option to have a drawable inside. This custom view will be placed in the Action Bar as well. I still need the view to respond to android:background state list drawables so I can have the click and selected accordance working.
This custom view will be placed in the action bar as well.
Source: Tips4all
Source: Tips4allSource: CCNA FINAL EXAM
I solved this by doing the following.
ReplyDeleteCreated this to make the rounded corner shape with a solid color. This also adds a translucent black to give it a pressed look against a blackground.
res/drawable/shape_notification.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<stroke android:color="#33000000" android:width="2dp"/>
<corners android:radius="4dp" />
<solid android:color="#99333333"/>
</shape>
The layer drawable will be used as the actual drawable on the action bar item. It has the background (written above) overlayed with the wrench icon.
res/drawable/layer_customizer.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/shape_notification" />
<item android:drawable="@drawable/ic_menu_preferences" />
</layer-list>
Java code to change the color. The target view is the object that is assigned the layer_customizer drawable. The color passed in will change the shape_notification.xml's solid tag color.
public static void setCustomizerDrawableColor(final View target, final int color) {
final Drawable d = target.getDrawable();
LayerDrawable layer = (LayerDrawable)d;
GradientDrawable gradient = (GradientDrawable)layer.getDrawable(0);
gradient.setColor(color);
gradient.invalidateSelf();
layer.invalidateSelf();
target.invalidate();
}