Android如何着色字符串的特定部分

文章选自*（简称：SOF）精选问答汇总系列文章之一，本系列文章将为读者分享国外最优质的精彩问与答，供读者学习和了解国外最新技术。本文探讨Android如何着色字符串的特定部分。

问题：

SiKni8

如下CustomAdapter:

package com.test.testing;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Locale;

import android.app.Activity;

import android.content.Context;

import android.graphics.Color;

import android.graphics.Typeface;

import android.text.Spannable;

import android.text.SpannableString;

import android.text.style.ForegroundColorSpan;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.TextView;

public class SetRowsCustomAdapter extends ArrayAdapter<SetRows> {

Context context;

int layoutResourceId;

ArrayList<SetRows> data=new
ArrayList<SetRows>();

DateFormat df = new
SimpleDateFormat("EEEEE, LLLL d", Locale.US);

String[] suspendedDates = {

"Monday, January 20",

"Friday, January 31",

};

public SetRowsCustomAdapter(Context context, int layoutResourceId, ArrayList<SetRows> data) {

super(context, layoutResourceId, data);

this.layoutResourceId = layoutResourceId;

this.context = context;

this.data = data;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

View row = convertView;

ImageHolder holder = null;

if

(row ==

null)

{

LayoutInflater inflater = ((Activity)context).getLayoutInflater();

row = inflater.inflate(layoutResourceId, parent,

false);

holder = new
ImageHolder();

holder.txtTitle = (TextView)row.findViewById(R.id.tvDateVal);

//holder.txtTitle.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));

holder.imgIcon = (ImageView)row.findViewById(R.id.ivIcon0);

holder.txtDate = (TextView)row.findViewById(R.id.tvDateNum);

holder.txtID = (TextView)row.findViewById(R.id.tvReasonVal);

//holder.txtID.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/robm.ttf"));

row.setTag(holder);

}

else

{

holder = (ImageHolder)row.getTag();

}

SetRows myImage = data.get(position);

int inReason = myImage.name.indexOf(","

);

//myImage.name is the same string as suspendedDates[];

String strR = myImage.name.substring(0, inReason);

Spannable WordToSpan = new
SpannableString(strR);

WordToSpan.setSpan(new
ForegroundColorSpan(Color.parseColor("#4787ED")), 0, WordToSpan.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

String strRNext = myImage.name.substring(inReason, myImage.name.length());

Spannable WordToSpan1 = new
SpannableString(strRNext);

WordToSpan1.setSpan(new
ForegroundColorSpan(R.color.dateholiday), 0, WordToSpan1.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

String strConcat = WordToSpan.toString() + WordToSpan1.toString();

holder.txtTitle.setText(strConcat);//myImage.name);

holder.txtID.setText(myImage.id);

holder.txtDate.setText(myImage.date);

int outImage=myImage.image;

/*if (myImage.name.contains(df.format(Calendar.getInstance(Locale.US).getTime()))) {

holder.imgIcon.setImageResource(R.drawable.caliconpressed);

}

else {

holder.imgIcon.setImageResource(R.drawable.calicon);

}*/

return
row;

}

static class ImageHolder

{

ImageView imgIcon;

TextView txtTitle;

TextView txtID;

TextView txtDate;

}

我用Spannable来给字符串分别着色，想要达到这种效果

Android如何着色字符串的特定部分

但是显示出来的还是这个样子：

Android如何着色字符串的特定部分

有没有谁知道如何利用Adapter来实现我想要的效果。

答案：

Booger

不要把Spannable变换成字符串 (也就是说，不要做:WordToSpan.toString())

而是，直接将Spannable设置到holder，就像这样：

1	`holder.txtTitle.setText(WordToSpan + WordToSpan1);`

Martin Cazares

像下面这样用spannable 字符串

SpannableString ss = new
SpannableString("hey #abc how are you.");

ss.setSpan(new
ForegroundColorSpan(Color.RED), 4, 9, 0);

//Now just add the SpannableString to your textview

textView.setText(ss);

希望这能帮到你。

原文链接：How to color specific part of a String

文章选自*社区，鉴于其内容对于开发者有所帮助，现将文章翻译于此，供大家参考及学习。9Tech将每日持续更新，读者可点击*（简称：SOF）精选问答汇总，查看全部译文内容。同时，我们也招募志同道合的技术朋友共同翻译，造福大家！报名请发邮件至zhangqi_wj#cyou-inc.com。（#换成@）

秒客网

Android如何着色字符串的特定部分

相关文章