如何勾勒出android的TextView文字？

public class TextOutlineProvider extends ViewOutlineProvider {
    @Override
    public void getOutline(View view, Outline outline) {
        TextView textView = (TextView) view;
        textView.setTypeface(null, Typeface.BOLD);
        textView.buildDrawingCache();
        Bitmap bitmap = textView.getDrawingCache();
        if (bitmap != null) {
            Path path = new Path();
            path.addRoundRect(new RectF(0, 0, bitmap.getWidth(), bitmap.getHeight()), 20, 20, Path.Direction.CW);
            outline.setConvexPath(path);
        }
    }
}

TextView textView = findViewById(R.id.textView);
textView.setOutlineProvider(new TextOutlineProvider());

TextPaint textPaint = new TextPaint();
textPaint.setColor(Color.BLACK);
textPaint.setAntiAlias(true);
textPaint.setStyle(Paint.Style.FILL);
textPaint.setTextSize(24);
textPaint.setTypeface(Typeface.DEFAULT_BOLD);

TextView textView = findViewById(R.id.textView);
textView.setPaintFlags(textView.getPaintFlags() | Paint.ANTI_ALIAS_FLAG | Paint.SUBPIXEL_TEXT_FLAG | Paint.LINEAR_TEXT_FLAG);
textView.setLayerType(View.LAYER_TYPE_SOFTWARE, textPaint);

<com.google.android.material.imageview.ShapeableImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:shapeAppearanceOverlay="@style/roundedCorner"
    app:srcCompat="@drawable/textView" />