アンドロイドのRegexでSpannableStringを使用するには？

Question

私はこの機能を使ってAndroidの中でspannableStringと正規表現を使用して文字列の色の部分にしようとしています：機能置き換える（）は文字列を返す

public static String StringReplace(String source) { 
     String find = "ABC"; 
     SpannableString replace = new SpannableString(find);   
     replace.setSpan(new ForegroundColorSpan(Color.RED), 0, 1, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 

     String output = source.replace(find, replace); 
     return output; 
    } 

ので、私はない色の文字列を取得することができています。私の質問です：regexpを使用してテキストの一部を色付けする最良の方法は何ですか？

Answer 1

9月10日更新 - ターゲット文字列のすべての出現箇所を変更

このような一般的なものは動作します：

public class SpanTest extends Activity { 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     String dispStr = "This has the string ABCDEF in it \nSo does this :ABCDEF - see!\nAnd again ABCD here"; 
     TextView tv = (TextView) findViewById(R.id.textView1); 
     tv.setText(dispStr); 
     changeTextinView(tv, "ABC", Color.RED); 
    } 

    private void changeTextinView(TextView tv, String target, int colour) { 
     String vString = (String) tv.getText(); 
     int startSpan = 0, endSpan = 0; 
     Spannable spanRange = new SpannableString(vString); 

     while (true) { 
      startSpan = vString.indexOf(target, endSpan); 
      ForegroundColorSpan foreColour = new ForegroundColorSpan(colour); 
      // Need a NEW span object every loop, else it just moves the span 
      if (startSpan < 0) 
       break; 
      endSpan = startSpan + target.length(); 
      spanRange.setSpan(foreColour, startSpan, endSpan, 
        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); 
     } 
     tv.setText(spanRange); 
    } 

} 

を。ここで

Answer 2

がお手伝いしますクラスです。

public class Replacer { 
    private final CharSequence mSource; 
    private final CharSequence mReplacement; 
    private final Matcher mMatcher; 
    private int mAppendPosition; 
    private final boolean mIsSpannable; 

    public static CharSequence replace(CharSequence source, String regex, 
      CharSequence replacement) { 

     Pattern pattern = Pattern.compile(regex); 
     Matcher matcher = pattern.matcher(source); 
     return new Replacer(source, matcher, replacement).doReplace(); 
    } 

    private Replacer(CharSequence source, Matcher matcher, 
      CharSequence replacement) { 
     mSource = source; 
     mReplacement = replacement; 
     mMatcher = matcher; 
     mAppendPosition = 0; 
     mIsSpannable = replacement instanceof Spannable; 
    } 

    private CharSequence doReplace() { 
     SpannableStringBuilder buffer = new SpannableStringBuilder(); 
     while (mMatcher.find()) { 
      appendReplacement(buffer); 
     } 
     return appendTail(buffer); 
    } 

    private void appendReplacement(SpannableStringBuilder buffer) { 
     buffer.append(mSource.subSequence(mAppendPosition, mMatcher.start())); 
     CharSequence replacement = mIsSpannable 
       ? copyCharSequenceWithSpans(mReplacement) 
       : mReplacement; 
     buffer.append(replacement); 

     mAppendPosition = mMatcher.end(); 
    } 

    public SpannableStringBuilder appendTail(SpannableStringBuilder buffer) { 
     buffer.append(mSource.subSequence(mAppendPosition, mSource.length())); 
     return buffer; 
    } 

    // This is a weird way of copying spans, but I don't know any better way. 
    private CharSequence copyCharSequenceWithSpans(CharSequence string) { 
     Parcel parcel = Parcel.obtain(); 
     try { 
      TextUtils.writeToParcel(string, parcel, 0); 
      parcel.setDataPosition(0); 
      return TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 
     } finally { 
      parcel.recycle(); 
     } 
    } 
} 

と使用方法の一例：

CharSequence modifiedText = Replacer.replace("ABC aaa AB ABC aa ad ABC", "ABC", 
    Html.fromHtml("<font color=\"red\">CBA</font>")); 
textView.setText(modifiedText);