ImageView 上显示文字

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
float drawDistance = (float) (getHeight() * 0.6);
float x = (float) (getWidth() * 0.25);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
canvas.drawText("显示的文字", x, drawDistance, paint);
}