Set andere Schriftart und Farbe, um einen Teil eines Textview

Question

Ich versuchte dies:

String s = "Some big string" 
SpannableStringBuilder sb = new SpannableStringBuilder(s); 
//normal font for 1st 9 chars 
sb.setSpan(robotoRegular, 0,9,Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
//bold font for rest of the chars 
sb.setSpan(robotoBold, 9,s.length(),Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
//also change color for rest of the chars 
sb.setSpan(new ForegroundColorSpan(Color.BLACK), 9,s.length(),Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
textView.setText(sb); 

Aber das hat nicht funktioniert.

Es dauert nur die letzte setSpan, dh .., die Textfarbe wird geändert, aber nicht die Schriftart.

Answer 1

Sie haben eine TypefaceSpan anstelle eines Typeface zu verwenden.

Da Sie jedoch eine benutzerdefinierte Schriftart verwenden, müssen Sie TypefaceSpan erweitern.

Überprüfen Sie diese answer und erstellen Sie Klasse.

nun wie folgt vor:

Typeface robotoRegular = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Regular.ttf"); 
Typeface robotoBold = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Bold.ttf"); 

TypefaceSpan robotoRegularSpan = new CustomTypefaceSpan("", robotoRegular); 
TypefaceSpan robotoBoldSpan = new CustomTypefaceSpan("", robotoBold); 

// normal font for 1st 9 chars 
sb.setSpan(robotoRegularSpan, 0, 9, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
// bold font for rest of the chars 
sb.setSpan(robotoBoldSpan, 9, s.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
// also change color for rest of the chars 
sb.setSpan(new ForegroundColorSpan(Color.BLUE), 9, s.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
textView.setText(sb); 

Answer 2

Überprüfung dieser Code: -

protected void onDraw(Canvas canvas) { 

     Paint circlePaint = new Paint(); 
     Typeface mType = Typeface.create(Typeface.SANS_SERIF, Typeface.ITALIC); 
     circlePaint.setTextSize(25); 
     circlePaint.setColor(Color.RED); 
     circlePaint.setTypeface(mType); 
     canvas.drawText("Default Typeface", 50, 100, circlePaint); 
     // 
     circlePaint.setFlags(Paint.UNDERLINE_TEXT_FLAG); 
     circlePaint.setColor(Color.YELLOW); 
     canvas.drawText("Underline Text Flag", 50, 120, circlePaint); 
     // 
     circlePaint.setFlags(Paint.STRIKE_THRU_TEXT_FLAG); 
     circlePaint.setColor(Color.GREEN); 
     canvas.drawText("Strike Thru Text Flag", 50, 140, circlePaint); 
     // 
     circlePaint.setFlags(Paint.ANTI_ALIAS_FLAG); 
     circlePaint.setColor(Color.WHITE); 
     canvas.drawText("Anti Alias Flag", 50, 160, circlePaint); 
     // 
     circlePaint.setFlags(Paint.DEV_KERN_TEXT_FLAG); 
     circlePaint.setColor(Color.WHITE); 
     canvas.drawText("Dev Kern Text Flag", 50, 180, circlePaint); 
     // 
     circlePaint.setFlags(Paint.FAKE_BOLD_TEXT_FLAG); 
     circlePaint.setColor(Color.CYAN); 
     canvas.drawText("Fake Bold Text Flag", 50, 200, circlePaint); 
    } 

Answer 3

Für peaple, die es vorziehen utils Klassen für diese zu machen:

public static SpannableStringBuilder makeTextBold (Activity activity, String string, int fromCharIndex, int toCharIndex) { 
    return makeTextBold(activity, new SpannableStringBuilder(string), fromCharIndex, toCharIndex); 
} 

public static SpannableStringBuilder makeTextBold (Activity activity, SpannableStringBuilder string, int fromCharIndex, int toCharIndex) { 
    SpannableStringBuilder sb = new SpannableStringBuilder(string); 
    Typeface bold = Typeface.createFromAsset(activity.getAssets(), "fonts/NexaBold.ttf"); 
    TypefaceSpan robotoBoldSpan = new CustomTypefaceSpan("", bold); 
    sb.setSpan(robotoBoldSpan, fromCharIndex, toCharIndex, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
    return sb; 
} 

public static SpannableStringBuilder colorText (int resourceId, String string, Activity activity, int fromCharIndex, int toCharIndex) { 
    return colorText(resourceId, new SpannableStringBuilder(string), activity, fromCharIndex, toCharIndex); 
} 

public static SpannableStringBuilder colorText (int resourceId, SpannableStringBuilder sb, Activity activity, int fromCharIndex, int toCharIndex) { 
    sb.setSpan(new ForegroundColorSpan(activity.getResources().getColor(resourceId)), fromCharIndex, toCharIndex, Spannable.SPAN_INCLUSIVE_INCLUSIVE); 
    return sb; 
}