加一句android:cacheColorHint="#000000"
或者看看主题中有没<item name="android:windowBackground">@null</item>
然后去掉。
float size = label.getPaint().measureText(item.getTitle());
while (size > 62) {
float newSize = label.getTextSize() - 0.5f;
label.setTextSize(newSize);
size = label.getPaint().measureText(item.getTitle());
}