[Android]TextUtils.ellipsize()截取指定长度字符串(附图文混排)

来源：互联网发布：c语言2017到2117闰年编辑：程序博客网时间：2024/05/18 00:32

参考：http://zilla.blog.51cto.com/3095640/984775

效果图：

实现代码：

// 监听布局变化，直接获取显示的长度txtDescription.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {@Overridepublic void onGlobalLayout() {if(availableTextWidth == 0&&txtDescription.getWidth()>0){TextPaint paint  = txtDescription.getPaint();int paddingLeft = txtDescription.getPaddingLeft();int paddingRight= txtDescription.getPaddingRight();int bufferWidth =(int) paint.getTextSize()*3;//缓冲区长度，空出两个字符的长度来给最后的省略号及图片// 计算出2行文字所能显示的长度availableTextWidth = (txtDescription.getWidth() - paddingLeft - paddingRight) * LINE_COUNT- bufferWidth;// 根据长度截取出剪裁后的文字String ellipsizeStr = (String) TextUtils.ellipsize(DESCRIPTION, (TextPaint) paint, availableTextWidth, TextUtils.TruncateAt.END);String imgTag = "img";int start = ellipsizeStr.length();int end = start + imgTag.length();SpannableStringBuilder ssBuilder = new SpannableStringBuilder(ellipsizeStr+imgTag);// 插入图片Drawable drawable = getResources().getDrawable(R.drawable.video);drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());ImageSpan imgSpan = new ImageSpan(drawable,ImageSpan.ALIGN_BASELINE);ssBuilder.setSpan(imgSpan, start, end, SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);txtDescription.setText(ssBuilder);if(Build.VERSION.SDK_INT>=16){txtDescription.getViewTreeObserver().removeOnGlobalLayoutListener(this);}else{txtDescription.getViewTreeObserver().removeGlobalOnLayoutListener(this);}}}});