绿色底黄色框内的就是原生TextView出现的情况,出现这种情况的主要原因就是分词问题。TextView会认为英文字符在没有空格给开的时候是一个完整的单词(它不局限于字母,也可能不是个单词)在当前行展示不下且在下一行能完整展示的时候,就会出现这种情况。
手动计算TextView每行能展示多少个字符,手动进行分行(在末尾加空字符或者换行符均可)。
AutoWrapTextView代码:
/**
* @author KaraShokZ
* DESCRIPTION 解决中英文混排,自动折行问题
* @name AutoWrapedTextView
**/
public class AutoWrapTextView extends AppCompatTextView {
public AutoWrapTextView(@NonNull Context context) {
super(context);
}
public AutoWrapTextView(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public AutoWrapTextView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
/**
* 手动计算TextView每行能展示多少字符,并分行
* @param charSequence 目标文本
* @return
*/
public String splitText(CharSequence charSequence) {
if (TextUtils.isEmpty(charSequence)) return "";
List splitTextList = new ArrayList<>();
int singleTextWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight(); // TextView 每行的宽度
int currentSingleTextWidth = 0; // 用来叠加字符的宽度
StringBuilder lineStringBuffer = new StringBuilder();
for (int i = 0, length = charSequence.length(); i < length; i++) {
char textChar = charSequence.charAt(i);
currentSingleTextWidth += getSingleCharWidth(textChar);
if (currentSingleTextWidth > singleTextWidth) {// 当字符宽度大于 TextView 的宽度时,需要折行
lineStringBuffer.append(" ");// 末尾加空字符,会强行分词
splitTextList.add(lineStringBuffer);
lineStringBuffer = new StringBuilder();
currentSingleTextWidth = 0;
i--;
} else {
lineStringBuffer.append(textChar);
if (i == length - 1) splitTextList.add(lineStringBuffer);
}
}
StringBuilder splitSb = new StringBuilder();
int maxLines = getMaxLines();
boolean hasMore = splitTextList.size() > maxLines;
if (hasMore){// 当所需行数大于最大行数时,手动截取
splitTextList = splitTextList.subList(0,maxLines);
}
for (StringBuilder stringBuilder : splitTextList){
splitSb.append(stringBuilder);
}
if (hasMore){// 当所需行数大于最大行数时,最后一行手动省略末尾(这个只适用于 ellipsize=end)
int length = splitSb.length();
String three_dots = "...";
splitSb.replace(length - three_dots.length() + 1,length - 1,three_dots);
}
return splitSb.toString();
}
/**
* 计算每个字符的宽度
* @param textChar 待计算的字符
* @return
*/
private float getSingleCharWidth(char textChar) {
float[] width = new float[1];
getPaint().getTextWidths(new char[] {textChar}, 0, 1, width);
return width[0];
}
}
使用:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val str1 = getText("abcdefghijklm")
exploreSpannableEllipsizeTextView1.setMovementMethod(FilterLinkMovementMethod())
exploreSpannableEllipsizeTextView1.setHighlightColor(this.getResources().getColor(R.color.white))
exploreSpannableEllipsizeTextView1.setText(str1)
val str2 = getText("abcdefghijklmnopqrstuvwxyzabcdefghijklmnop")
exploreSpannableEllipsizeTextView2.setMovementMethod(FilterLinkMovementMethod())
exploreSpannableEllipsizeTextView2.setHighlightColor(this.getResources().getColor(R.color.white))
exploreSpannableEllipsizeTextView2.setText(str2)
val str3 = getText("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnop")
exploreSpannableEllipsizeTextView3.setMovementMethod(FilterLinkMovementMethod())
exploreSpannableEllipsizeTextView3.setHighlightColor(this.getResources().getColor(R.color.white))
exploreSpannableEllipsizeTextView3.setText(str3)
autoWrapTextView1.setMovementMethod(FilterLinkMovementMethod())
autoWrapTextView1.setHighlightColor(this.getResources().getColor(R.color.white))
autoWrapTextView1.post {
val str11 = autoWrapTextView1.splitText(str1)
autoWrapTextView1.setText(getText1(str11))
}
autoWrapTextView2.setMovementMethod(FilterLinkMovementMethod())
autoWrapTextView2.setHighlightColor(this.getResources().getColor(R.color.white))
autoWrapTextView2.post {
val str22 = autoWrapTextView2.splitText(str2)
autoWrapTextView2.setText(getText1(str22))
}
autoWrapTextView3.setMovementMethod(FilterLinkMovementMethod())
autoWrapTextView3.setHighlightColor(this.getResources().getColor(R.color.white))
autoWrapTextView3.post {
val str33 = autoWrapTextView3.splitText(str3)
autoWrapTextView3.setText(getText1(str33))
}
}
fun getText(content: String) : SpannableString {
var activityName: String = "#是的冯绍峰#"
var contentStrB: StringBuilder = StringBuilder(activityName)
contentStrB.append(content)
var spannableString: SpannableString = SpannableString(contentStrB.toString())
var colorSpan: ForegroundColorSpan = ForegroundColorSpan(this.getResources().getColor(R.color.color_3AA2E1));
spannableString.setSpan(colorSpan, 0,activityName.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
var clickableSpan: ExploreContentActivityIntentClickableSpan = ExploreContentActivityIntentClickableSpan("111");
spannableString.setSpan(clickableSpan, 0, activityName.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return spannableString
}
fun getText1(content: String) : SpannableString {
var activityName: String = "#是的冯绍峰#"
var spannableString: SpannableString = SpannableString(content)
var colorSpan: ForegroundColorSpan = ForegroundColorSpan(this.getResources().getColor(R.color.color_3AA2E1));
spannableString.setSpan(colorSpan, 0,activityName.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
var clickableSpan: ExploreContentActivityIntentClickableSpan = ExploreContentActivityIntentClickableSpan("111");
spannableString.setSpan(clickableSpan, 0, activityName.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return spannableString
}
}
主要有两点:
1、这样会破坏纯英文下的分词,也就是正常情况下当末尾端的英文单词展示不下时,系统会把它折到下一行去。这样的强行干扰会破坏此机制,末尾端的单词可能会被折断。
2、大家可以看到这个计算其实还是有点消耗性能的,就位了这么一点点的所谓的美观,其实有些不值当。因为像微信、微博等都没有处理这种情况。可见这个所谓的优化其实是有点画蛇添足的(当然,产品大大要求除外)。
所以,这里不推荐各位小主去处理这种东西。当然,如果真有这种需求的话,希望可以给小主提供一个思路。