如何在安卓系统中为staticLayout添加背景色

public class CustomTextView extends TextView {
    private Paint mPaint;

    public CustomTextView(Context context) {
        super(context);
        init();
    }

    public CustomTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CustomTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.FILL);
        mPaint.setColor(Color.YELLOW); // 设置背景色为黄色
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        int lineCount = getLineCount();
        Rect rect = new Rect();

        for (int i = 0; i < lineCount; i++) {
            getLineBounds(i, rect);
            canvas.drawRect(rect, mPaint);
        }
    }
}

<com.example.CustomTextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Hello, World!"
    android:textSize="20sp" />