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package com.sirelon; |
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import android.support.annotation.ColorInt; |
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import android.text.SpannableString; |
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import android.text.Spanned; |
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import android.text.TextPaint; |
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import android.text.TextUtils; |
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import android.text.method.LinkMovementMethod; |
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import android.text.style.ClickableSpan; |
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import android.view.View; |
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import android.widget.TextView; |
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import java.util.regex.Matcher; |
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import java.util.regex.Pattern; |
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/** |
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* @author romanishin |
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* @since 31.05.16. |
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*/ |
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public class HashtagsText { |
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private int color; |
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private OnHashTagClick mListener; |
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private boolean withUnderLine; |
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public HashtagsText() { |
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} |
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public HashtagsText callback(HashtagsText.OnHashTagClick listener) { |
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this.mListener = listener; |
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return this; |
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} |
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public HashtagsText color(@ColorInt int color) { |
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this.color = color; |
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return this; |
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} |
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public HashtagsText withUnderLine(boolean value) { |
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this.withUnderLine = value; |
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return this; |
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} |
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public void setHastags(TextView textView, String text) { |
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if (TextUtils.isEmpty(text)) { |
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return; |
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} |
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textView.setMovementMethod(LinkMovementMethod.getInstance()); |
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//Pattern to find if there's a hash tag in the message |
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//i.e. any word starting with a # and containing letter or numbers or _ |
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Pattern tagMatcher = Pattern.compile("[#]+[A-Za-z0-9-_]+\\b"); |
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ClickableSpan clickableSpan; |
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int start; |
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int end; |
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SpannableString spannableString = new SpannableString(text); |
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Matcher matcher = tagMatcher.matcher(text); |
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while (matcher.find()) { |
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start = matcher.start(); |
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end = matcher.end(); |
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final CharSequence hashTag = text.subSequence(start, end); |
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clickableSpan = new ClickableSpan() { |
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@Override |
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public void onClick(View widget) { |
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if (mListener != null) |
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mListener.onHasTagClick(hashTag); |
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} |
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@Override |
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public void updateDrawState(TextPaint ds) { |
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if (color != -1) |
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ds.setColor(color); |
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ds.setUnderlineText(withUnderLine); |
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} |
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}; |
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spannableString.setSpan(clickableSpan, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); |
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} |
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textView.setText(spannableString); |
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} |
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public interface OnHashTagClick { |
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void onHasTagClick(CharSequence hastag); |
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} |
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} |
