我有一个TextView
存储一个两行长的地址。街道在第一行,并且是大胆的。城市与城市国家走在第二行,并不是大胆的。如果该行上的单个文本运行,我希望每行的结尾都是椭圆形的。我正在使用SpannableString
来存储地址,因为我希望街道地址是大胆的,而城市和地址是国家不大胆。
如果没有为每一行使用两个TextViews
,有没有办法做到这一点并不是完全黑客?
示例输出:
例如:
123812华盛顿A ...
Schenectady New Yor ......
例如:
2792 Dantzler Boulev ...
查尔斯顿SC,29406
例如:
3主街道
亚特兰大GA
答案 0 :(得分:17)
我遇到了同样的问题,并通过创建EllipsizeLineSpan类来解决它。你可以用它包装你想要椭圆化的每一行。
使用它标记可跨越字符串的示例:
SpannableStringBuilder textspan = new SpannableStringBuilder("#1.Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n"+
"Protect from ellipsizing #2.Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n"+
"#3.Lorem ipsum dolor sit amet, consectetur adipisicing elit\n"+
"#4.Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n");
// find ellipsizable text (from '#' to newline)
Pattern pattern = Pattern.compile("#.*\\n", Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(textspan);
while(matcher.find()) {
textspan.setSpan(new EllipsizeLineSpan(), matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
EllipsizeLineSpan:
public class EllipsizeLineSpan extends ReplacementSpan implements LineBackgroundSpan {
int layoutLeft = 0;
int layoutRight = 0;
public EllipsizeLineSpan () {
}
@Override
public void drawBackground (Canvas c, Paint p,
int left, int right,
int top, int baseline, int bottom,
CharSequence text, int start, int end,
int lnum) {
Rect clipRect = new Rect();
c.getClipBounds(clipRect);
layoutLeft = clipRect.left;
layoutRight = clipRect.right;
}
@Override
public int getSize (Paint paint, CharSequence text, int start, int end,
Paint.FontMetricsInt fm) {
return layoutRight - layoutLeft;
}
@Override
public void draw (Canvas canvas, CharSequence text, int start, int end,
float x, int top, int y, int bottom, Paint paint) {
float textWidth = paint.measureText(text, start, end);
if (x + (int) Math.ceil(textWidth) < layoutRight) { //text fits
canvas.drawText(text, start, end, x, y, paint);
} else {
float ellipsiswid = paint.measureText("\u2026");
// move 'end' to the ellipsis point
end = start + paint.breakText(text, start, end, true, layoutRight - x - ellipsiswid, null);
canvas.drawText(text, start, end, x, y, paint);
canvas.drawText("\u2026", x + paint.measureText(text, start, end), y, paint);
}
}
}
答案 1 :(得分:1)
DangVarmit的回答对我有很大帮助,但在使用它一段时间后,我发现有时文本的顶部偏移是随机错误的。以下是需要更换的部分:
override fun getSize(paint: Paint, text: CharSequence, start: Int, end: Int, fontMetricsInt: Paint.FontMetricsInt?): Int {
fontMetricsInt?.let {
it.top = paint.getFontMetricsInt(it)
}
return Math.round(paint.measureText(text, start, start))
}
答案 2 :(得分:-2)
尝试在布局中设置TextView
椭圆尺寸,如:
android:ellipsize="end"