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I can change the color of vector drawables programmatically, but I want to apply the stroke to vector drawable. I need a method that will change the vector drawable stroke at runtime:

previously i used this method but failed in my case.

i converted the Vector drawable into bitmap and then apply border with this function but it fills all with black, the stroke is not applied.

 private static Bitmap getBitmap(VectorDrawable vectorDrawable)
 
 Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(),
 vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
 Canvas canvas = new Canvas(bitmap);
 vectorDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
 vectorDrawable.draw(canvas);
 return bitmap;
 
 private static Bitmap getBitmap(Context context, int drawableId)
 

 Drawable drawable = ContextCompat.getDrawable(context, drawableId);
 if (drawable instanceof BitmapDrawable)
 
 return ((BitmapDrawable) drawable).getBitmap();
 
 else if (drawable instanceof VectorDrawable)
 
 return getBitmap((VectorDrawable) drawable);
 
 else
 
 throw new IllegalArgumentException("unsupported drawable type");
 
 
private Bitmap addWhiteBorder(Bitmap bmp, int borderSize)
 
 Bitmap bmpWithBorder = Bitmap.createBitmap(bmp.getWidth() + borderSize*2 , bmp.getHeight() + borderSize*2 , bmp.getConfig());
 Canvas canvas = new Canvas(bmpWithBorder);
 canvas.drawColor(Color.BLACK);
 canvas.drawBitmap(bmp, borderSize, borderSize, null);
 return bmpWithBorder;
 

Look at this answer

https://stackoverflow.com/a/52960168/10592895

You can use vector drawable with different viewport width and height as background.

To do it programmatically, you can set background to transparent or a drawable with different dimension based on your needs.

Hope this helps.

Assume you have the VectorDrawable defined in vectordrawable.xml

<vector
 android:width="100dp"
 android:height="100dp"
 android:viewportWidth="100"
 android:viewportHeight="100">
 <path
 android:name="headset"
 android:strokeColor="#FF000000"
 android:strokeWidth="0"
 ...
 android:pathData="..." />
</vector>

Then you can define an AnimatedVectorDrawable to change the strokeWidth

<?xml version="1.0" encoding="utf-8"?>
<animated-vector
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:drawable="@drawable/vectordrawable">
 <target
 android:animation="@animator/change_stroke_width"
 android:name="headset" />

</animated-vector>

Finally, define the animation that changes the strokeWidth in change_stroke_width.xml:

<set xmlns:android="http://schemas.android.com/apk/res/android" >
 <objectAnimator
 android:duration="100"
 android:propertyName="strokeWidth"
 android:valueFrom="0"
 android:valueTo="10" />
</set>