测量在画布中绘制文本的自定义视图的宽度和高度

Question

我有一个自定义视图，它会相应地在画布中绘制文本：

public class MTextView extends View {
    public String fontFamily = "default";
    public float fontSize = 14;
    public String text = "Hello";
    public int fontFillColor;



    private Paint textPaint = new Paint();

    private Rect bound = new Rect();

    public MTextView(Context context) {
        this(context, null);
    }

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

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (text == null || text.equals("")) return;


        textPaint.setColor(fontFillColor);
        textPaint.setTextSize(fontSize);
        textPaint.setTypeface(getTypeFace());
        canvas.drawText(text, 10, 60, textPaint);

        textPaint.getTextBounds(text, 0, text.length() - 1, bound);
    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(bound.width(), bound.height());
        Log.d("view", bound + "");
    }
}

现在，一旦我将这个视图添加到布局中，我就看不到这个视图了，我总是得到这样的日志：

view Rect(0, 0 - 0, 0)

似乎onMeasure没有得到真正的维度。

如何解决？