如何为String的特定部分着色

Question

我有以下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;
   }
}

我正在使用Spannable设置字符串的单独颜色。它应该产生这样的东西：

但它仍在显示：

任何人都知道如何编辑适配器以实现我想要做的事情？

Answer 1

使用spannable字符串如下：

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);

希望这有助于。

问候！

Answer 2

不要将Spannable转换为String。 （即不要做：WordToSpan.toString()）

相反，将Spannable直接设置为持有者，如下所示：

holder.txtTitle.setText(WordToSpan + WordToSpan1);