TextView整数作为可绘制的png

public class IntegerDrawable extends Drawable {
    private int number;
    private Paint paint;

    public IntegerDrawable(int number) {
        this.number = number;
        paint = new Paint();
        paint.setColor(Color.BLACK);
        paint.setTextSize(50);
        paint.setTextAlign(Paint.Align.CENTER);
    }

    @Override
    public void draw(@NonNull Canvas canvas) {
        String text = String.valueOf(number);
        Rect bounds = new Rect();
        paint.getTextBounds(text, 0, text.length(), bounds);
        int x = canvas.getWidth() / 2;
        int y = canvas.getHeight() / 2 + bounds.height() / 2;
        canvas.drawText(text, x, y, paint);
    }

    @Override
    public void setAlpha(int alpha) {
        // Do nothing
    }

    @Override
    public void setColorFilter(@Nullable ColorFilter colorFilter) {
        // Do nothing
    }

    @Override
    public int getOpacity() {
        return PixelFormat.OPAQUE;
    }
}

TextView textView = findViewById(R.id.text_view);
IntegerDrawable drawable = new IntegerDrawable(42);
textView.setBackground(drawable);