我有一个的TextView
与未知的最大高度,这取决于设备的DPI /屏幕分辨率。所以,举例来说,上和MDPI装置这个最大高度使得能够在一个时间只显示2行,可以提高到一个未定义数的值。
I have a TextView
with an unknown maximum height, which is dependent on the device's DPI/screen resolution. So, for instance, on and MDPI device this maximum height makes it possible to show only 2 lines at a time, a value that can be increased up to an undefined number.
我的问题是有关与ellipsize功能。让我们假设目标设备允许要显示4行。如果我手动设置的行的最大数目,像这样...
My issue is related with the ellipsize functionality. Let's suppose that a certain device allows for 4 lines to be displayed. If I manually set the maximum number of lines, like this...
<TextView
android:id="@+id/some_id"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:ellipsize="end"
android:maxLines="4"
android:singleLine="false"
android:layout_weight="1"
android:gravity="center_vertical"
android:text="This is some really really really really really long text"
android:textSize="15sp" />
...一切正常确定。如果文本不适合正常,则省略号被添加在第四行的末尾,这样的:
...everything works OK. If the text doesn't fit properly, then the ellipsis are added at the end of the fourth line, like this:
This is some
really really
really really
really long...
但我宁愿的没有的设定的行数作为一个静态变量,因为我想preFER以包括DPI /屏幕分辨率的任意组合的支持。所以,如果我删除 MAXLINES
省略号不再正确显示在四个行,反而显示不完整的文字部分:
But I'd rather not set the number of lines as a static variable, as I would prefer to include support for any combination of DPI/screen resolution. So if I remove maxLines
the ellipsis is no longer correctly shown at line four, showing instead an incomplete portion of text:
This is some
really really
really really
really long
如果我稍微增加的TextView
尺寸,我可以看到一个正在绘制的文本的其他部分隐藏在其他浏览
。设置变量了maxHeight
似乎并没有擦出火花。
If I slightly increase the TextView
size, I can see that the rest of the text is still being drawn "behind" the other Views
. Setting the variable maxHeight
doesn't seem to work either.
我仿佛真的无法找到针对此问题的解决方案。有任何想法吗?如果有帮助,我唯一的工作与Android V4.0.3及以上(API等级15)。
I really can't seem to find a solution for this issue. Any ideas? If it helps, I'm working only with Android v4.0.3 and up (API level 15).
推荐答案
计算有多少行融入的TextView
与的TextView#的getHeight()
和的TextView#getLineHeight()
。然后调用的TextView#setMaxLines()
。
Calculate how many lines fit into the TextView
with TextView#getHeight()
and TextView#getLineHeight()
. Then call TextView#setMaxLines()
.
ViewTreeObserver observer = textView.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int maxLines = (int) textView.getHeight()
/ textView.getLineHeight();
textView.setMaxLines(maxLines);
textView.getViewTreeObserver().removeGlobalOnLayoutListener(
this);
}
});
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