package com.hdl.photovoltaic.utils;
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import android.graphics.Paint;
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import android.graphics.Typeface;
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import android.text.Spannable;
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import android.text.SpannableString;
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import android.text.TextPaint;
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import android.text.style.BackgroundColorSpan;
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import android.text.style.ClickableSpan;
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import android.text.style.ForegroundColorSpan;
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import android.text.style.MetricAffectingSpan;
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import android.text.style.RelativeSizeSpan;
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import android.view.View;
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import androidx.annotation.NonNull;
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/**
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* String字符串通过区间来改变颜色，大小，字体，下划线等
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*/
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public class SpanUtils {
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private long mLastClickTime = 0;
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public static final int TIME_INTERVAL = 1000;
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private static volatile SpanUtils sSpanUtils;
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/**
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* 获取当前对象
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*
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* @return HdlCommonLogic
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*/
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public static synchronized SpanUtils getInstance() {
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if (sSpanUtils == null) {
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synchronized (SpanUtils.class) {
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if (sSpanUtils == null) {
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sSpanUtils = new SpanUtils();
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}
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}
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}
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return sSpanUtils;
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}
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private SpanUtils() {
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}
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/**
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* 变大变小
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*/
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public CharSequence toSizeSpan(CharSequence charSequence, int start, int end, float scale) {
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SpannableString spannableString = new SpannableString(charSequence);
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spannableString.setSpan(
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new RelativeSizeSpan(scale),
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start,
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end,
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Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannableString;
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}
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/**
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* 变色
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*/
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public CharSequence toColorSpan(CharSequence charSequence, int start, int end, int color) {
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SpannableString spannableString = new SpannableString(charSequence);
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spannableString.setSpan(
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new ForegroundColorSpan(color),
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start,
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end,
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Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannableString;
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}
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/**
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* 变背景色
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*/
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public CharSequence toBackgroundColorSpan(CharSequence charSequence, int start, int end, int color) {
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SpannableString spannableString = new SpannableString(charSequence);
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spannableString.setSpan(
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new BackgroundColorSpan(color),
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start,
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end,
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Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannableString;
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}
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/**
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* 可点击-带下划线
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*/
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public CharSequence toClickSpan(CharSequence charSequence, int start, int end, int color, boolean needUnderLine, OnSpanClickListener listener) {
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SpannableString spannableString = new SpannableString(charSequence);
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ClickableSpan clickableSpan = new ClickableSpan() {
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@Override
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public void onClick(@NonNull View widget) {
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if (listener != null) {
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//防止重复点击
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if (System.currentTimeMillis() - mLastClickTime >= TIME_INTERVAL) {
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//to do
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listener.onClick(charSequence.subSequence(start, end));
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mLastClickTime = System.currentTimeMillis();
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}
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}
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}
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@Override
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public void updateDrawState(@NonNull TextPaint ds) {
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ds.setColor(color);
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ds.setUnderlineText(needUnderLine);
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}
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};
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spannableString.setSpan(
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clickableSpan,
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start,
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end,
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Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannableString;
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}
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public interface OnSpanClickListener {
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void onClick(CharSequence charSequence);
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}
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/**
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* 变成自定义的字体
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*/
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public CharSequence toCustomTypeFaceSpan(CharSequence charSequence, int start, int end, Typeface typeface) {
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SpannableString spannableString = new SpannableString(charSequence);
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spannableString.setSpan(
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new MyTypefaceSpan(typeface),
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start,
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end,
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Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannableString;
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}
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/**
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* 系统原生的TypefaceSpan只能使用原生的默认字体
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* 如果使用自定义的字体，通过这个来实现
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*/
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public class MyTypefaceSpan extends MetricAffectingSpan {
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private final Typeface typeface;
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public MyTypefaceSpan(final Typeface typeface) {
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this.typeface = typeface;
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}
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@Override
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public void updateDrawState(final TextPaint drawState) {
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apply(drawState);
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}
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@Override
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public void updateMeasureState(final TextPaint paint) {
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apply(paint);
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}
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private void apply(final Paint paint) {
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final Typeface oldTypeface = paint.getTypeface();
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final int oldStyle = oldTypeface != null ? oldTypeface.getStyle() : 0;
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int fakeStyle = oldStyle & ~typeface.getStyle();
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if ((fakeStyle & Typeface.BOLD) != 0) {
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paint.setFakeBoldText(true);
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}
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if ((fakeStyle & Typeface.ITALIC) != 0) {
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paint.setTextSkewX(-0.25f);
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}
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paint.setTypeface(typeface);
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}
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}
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}
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