带有虚线Android的自定义跨度下划线文本 [英] Custom Span Underline Text with Dotted line Android
问题描述
我很想在文本中用点划线或下划线加下划线,以及单击可跨度.
I was tiring to underline a specific word in the text with a dotted or dashed line with and also Clickable Span.
我还没有找到解决方案,请有人帮我.
I haven't found a solution can someone help me, please.
SpannableStringBuilder sb =新的SpannableStringBuilder(文本); 列表listmot = new ArrayList();
SpannableStringBuilder sb = new SpannableStringBuilder(text); List listmot = new ArrayList();
listmot=db.getAlldef();
for(int i=0;i<listmot.size();i++)
{
String mot = (listmot.get(i)).get_mot();
final String def = (listmot.get(i)).get_definition();
Log.v(null, mot);
Pattern p = Pattern.compile(mot, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(text);
while (m.find()){
// Typeface tf = Typeface.createFromAsset(getApplicationContext().getAssets(),"fonts/font.ttf");
//sb.setSpan(new CustomTypefaceSpan("",tf), m.start(), m.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
sb.setSpan(new ClickableSpan() {
@Override
public void onClick(View widget) {
// Toast.makeText(getApplicationContext(), def,Toast.LENGTH_LONG).show();
int[] values = new int[2];
widget.getLocationOnScreen(values);
Log.d("X & Y",values[0]+" "+values[1]);
AlertDialog.Builder alertDialog = new AlertDialog.Builder(
AndroidSQLiteTutorialActivity.this);
alertDialog.setMessage(def);
alertDialog.setCancelable(true);
AlertDialog alert11 = alertDialog.create();
alert11.setCanceledOnTouchOutside(true);
alert11.show();
}
}, m.start(), m.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
textjson.setText(sb);
textjson.setMovementMethod(LinkMovementMethod.getInstance());
推荐答案
编辑:我已经更新了解决方案.有时,由于某种原因没有调用带有 LineBackgroundSpan 的解决方案中的 drawBackground 方法.新版本一直有效,而且看起来更加清晰.
I have updated solution. Sometimes that drawBackground method in solution with LineBackgroundSpan just haven't been called for no reasons. New version works all the time and looks much clearer.
我遇到了同样的问题,我通过结合以下解决方案解决了这个问题:
I met the same problem and i solved it by combining this solutions:
- this https://stackoverflow.com/a/21097663/5373069 and
- this https://stackoverflow.com/a/6104138/5373069
结果代码如下:
private static class DottedUnderlineSpan extends ReplacementSpan {
private Paint p;
private int mWidth;
private String mSpan;
private float mSpanLength;
private boolean mLengthIsCached = false;
public DottedUnderlineSpan(int _color, String _spannedText){
p = new Paint();
p.setColor(_color);
p.setStyle(Paint.Style.STROKE);
p.setPathEffect(new DashPathEffect(new float[]{mDashPathEffect, mDashPathEffect}, 0));
p.setStrokeWidth(mStrokeWidth);
mSpan = _spannedText;
}
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {
mWidth = (int) paint.measureText(text, start, end);
return mWidth;
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
canvas.drawText(text, start, end, x, y, paint);
if(!mLengthIsCached)
mSpanLength = paint.measureText(mSpan);
// https://code.google.com/p/android/issues/detail?id=29944
// canvas.drawLine can't draw dashes when hardware acceleration is enabled,
// but canvas.drawPath can
Path path = new Path();
path.moveTo(x, y + mOffsetY);
path.lineTo(x + mSpanLength, y + mOffsetY);
canvas.drawPath(path, this.p);
}
}
要使您的下划线在所有密度集上的外观都与 dp
To make your underline look the same on all densities set that dimens in dp
mStrokeWidth = context.getResources().getDimension(R.dimen.stroke_width);
mDashPathEffect = context.getResources().getDimension(R.dimen.dash_path_effect);
mOffsetY = context.getResources().getDimension(R.dimen.offset_y);
这是您的使用方式:
DottedUnderlineSpan dottedUnderlineSpan = new DottedUnderlineSpan(0xFF00FF00, spannedText);
spannableString.setSpan(dottedUnderlineSpan, startOfText, endOfText, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
并确保您关闭了TextView上的硬件加速功能,该功能会显示下划线范围. https://stackoverflow.com/a/24467362/5373069
And be sure that you turn off hardware acceleration on textView that will show the underline span. https://stackoverflow.com/a/24467362/5373069
编辑:如果您看到改进此解决方案的方法,我将不胜感激.
if you see ways to improve this solution i would appreciate any good points.
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