Spannable TextView

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A spannable TextView can be used in Android to highlight a particular portion of text with a different color, style, size, and/or click event in a single TextView widget.

Consider that you have defined a TextView as follows:

TextView textview=findViewById(R.id.textview);

Then you can apply different highlighting to it as shown below:

Spannable color: In order to set a different color to some portion of text, a ForegroundColorSpan can be used, as shown in the following example:

Spannable spannable = new SpannableString(firstWord+lastWord);
spannable.setSpan(new ForegroundColorSpan(firstWordColor), 0, firstWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(new ForegroundColorSpan(lastWordColor), firstWord.length(), firstWord.length()+lastWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textview.setText( spannable );

Output created by the code above:

Spannable font: In order to set a different font size to some portion of text, a RelativeSizeSpan can be used, as shown in the following example:

Spannable spannable = new SpannableString(firstWord+lastWord);
spannable.setSpan(new RelativeSizeSpan(1.1f),0, firstWord.length(),  Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); // set size
spannable.setSpan(new RelativeSizeSpan(0.8f), firstWord.length(), firstWord.length() + lastWord.length(),  Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); // set size
textview.setText( spannable );

Output created by the code above:

[![Example text highlighted by larger font size][2]][2]

Spannable typeface: In order to set a different font typeface to some portion of text, a custom TypefaceSpan can be used, as shown in the following example:

Spannable spannable = new SpannableString(firstWord+lastWord);
spannable.setSpan( new CustomTypefaceSpan("SFUIText-Bold.otf",fontBold), 0, firstWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan( new CustomTypefaceSpan("SFUIText-Regular.otf",fontRegular), firstWord.length(), firstWord.length() + lastWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
text.setText( spannable );

However, in order to make the above code working, the class CustomTypefaceSpan has to be derived from the class TypefaceSpan. This can be done as follows:

public class CustomTypefaceSpan extends TypefaceSpan {
    private final Typeface newType;

    public CustomTypefaceSpan(String family, Typeface type) {
        super(family);
        newType = type;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        applyCustomTypeFace(ds, newType);
    }

    @Override
    public void updateMeasureState(TextPaint paint) {
        applyCustomTypeFace(paint, newType);
    }

    private static void applyCustomTypeFace(Paint paint, Typeface tf) {
        int oldStyle;
        Typeface old = paint.getTypeface();
        if (old == null) {
            oldStyle = 0;
        } else {
            oldStyle = old.getStyle();
        }
        int fake = oldStyle & ~tf.getStyle();
        if ((fake & Typeface.BOLD) != 0) {
            paint.setFakeBoldText(true);
        }

        if ((fake & Typeface.ITALIC) != 0) {
            paint.setTextSkewX(-0.25f);
        }

        paint.setTypeface(tf);
    }
}

Found a mistake? Have a question or improvement idea? Let me know.

TextView:

* TextView

* Spannable TextView

* Make RelativeSizeSpan align to top

* TextView with image

* Strikethrough TextView

* Pinchzoom on TextView

* Textview with different Textsize

* Theme and Style customization

* TextView customization

* Single TextView with two different colors

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0 Getting Started

1 Layouts

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3 RecyclerView onClickListeners

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52 Tools Attributes

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58 The Manifest File

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62 Data Synchronization with Sync Adapter

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73 Integrate Google Sign In

74 In-app billing

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77 Dagger 2

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79 Unit testing in Android with JUnit

80 Android Versions

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82 SensorManager

83 Localization with resources

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86 Vibration

87 Google Awarness APIs

88 Text to Speech (TTS)

89 UI Lifecycle

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92 Testing UI with Espresso

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95 OkHttp

96 Enhancing Performance Using Icon Fonts

97 Handling Depp Links

98 Canvas drawing using SurfaceView

99 Firebase

100 Crash Reporting Tools

101 Check Internet Connectivity

102 Facebook SDK

103 Unzip File

104 Android Places API

105 Creating your own libraries

106 Handling JSON with Gson

107 Device Display Metrics

108 TextView

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110 Building Backwards Compatible Apps

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112 ProGuard - Obfuscating and Shrinking your code

113 Detect Shake Event

114 Typedef Annotations

115 Capturing Screenshots

116 MVP Architecture

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120 PackageManager

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122 Gesture Detection

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124 Android Sound and Media

125 SearchView

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127 Callback URL

128 Twitter APIs

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132 ConstraintLayout

133 RenderScript

134 Fresco

135 Swipe to Refresh

136 AutoCompleteTextView

137 Installing apps with ADB

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154 Displaying Google Ads

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156 Localized DateTime

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158 Reading Barcode and QR codes

159 Otto Event Bus

160 TransitionDrawable

161 Port Mapping using Cling

162 Creating Overlay always-on-top Windows

163 ExoPlayer

164 Inter-app UI testing with UIAutomator

165 MediaSession

166 Speech to Text Conversion

167 FileProvider

168 Publish .aar file to Apache Archive with Gradle

169 XMPP

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171 RecyclerView and LayoutManagers

172 AudioManager

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174 Accounts and AccountManager

175 OpenCV

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196 Getting started with OpenGL ES 2.0

197 Check Data Connection

198 Java Native Interface (JNI)

199 FileIO

200 Perfomance Optimization

201 Robolectric

202 Moshi

203 Strick Mode Policy

204 Internalization and localization

205 Retrolambda

206 SparseArray

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208 Shared Element Transitions

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213 Formatting phone numbers

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219 Create Android Custom ROMs

220 Java on Android

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222 Genymotion for Android

223 Handling touch and motion events

224 Creating Splash screen

225 ConstraintSet

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227 Publish library to Maven repositories

228 ADB shell

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232 Autosizing TextView

233 Signing apps for release

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236 Secure SharedPreferences

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240 JCodec

241 Design Patterns

242 Okio

243 Google SignIn integration

244 TensorFlow

245 Game developmen

246 Notification Channel

247 Bluetooth Low Energy (LE)

248 Leak Canary

249 FuseView

250 SQLite using ContentValues

251 Enhancing Alert Dialogs

252 Hardware Button Events, Intents PTT

253 SpannableString

254 Looper

255 Optimized VideoView

256 Google Drive API

257 Animated AlertDialog Box

258 Annotation Processor

259 SyncAdapter with periodically do sync of data

260 Singleton Class for Toast Message

261 Fastjson

262 Android Architecture Components

263 Jackson

264 Play Store

265 Loading Bitmaps Effectively

266 Getting system font names

267 Smartcard

268 Convert vietnamese string to english

269 Contributors