如何在TextView中无限滚动长文本

public class InfiniteScrollTextView extends TextView {
    private float textWidth;
    private float viewWidth;
    private float step = 0.5f;
    private float currentX = 0f;
    private boolean isScrolling = true;

    public InfiniteScrollTextView(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onDraw(Canvas canvas) {
        if (isScrolling) {
            textWidth = getPaint().measureText(getText().toString());
            viewWidth = getWidth();
            if (currentX > viewWidth) {
                currentX = -textWidth;
            }
            currentX += step;
            canvas.drawText(getText().toString(), currentX, getBaseline(), getPaint());
            invalidate();
        } else {
            super.onDraw(canvas);
        }
    }

    public void startScroll() {
        isScrolling = true;
        invalidate();
    }

    public void stopScroll() {
        isScrolling = false;
        invalidate();
    }
}

<com.example.InfiniteScrollTextView
    android:id="@+id/infinite_scroll_textview"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Your long text here"
    android:singleLine="true"
    android:ellipsize="marquee"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:marqueeRepeatLimit="marquee_forever"
    android:scrollHorizontally="true"
    android:padding="10dp"
    android:textSize="16sp" />

InfiniteScrollTextView textView = findViewById(R.id.infinite_scroll_textview);
textView.startScroll(); // 启动滚动
textView.stopScroll(); // 停止滚动