Show and Hide FloatingActionButton on Swipe

suggest change

To show and hide a FloatingActionButton with the default animation, just call the methods show() and hide(). It’s good practice to keep a FloatingActionButton in the Activity layout instead of putting it in a Fragment, this allows the default animations to work when showing and hiding.

Here is an example with a ViewPager:

Three Tabs
Show FloatingActionButton for the first and third Tab
Hide the FloatingActionButton on the middle Tab

public class MainActivity extends AppCompatActivity {

    FloatingActionButton fab;
    ViewPager viewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fab = (FloatingActionButton) findViewById(R.id.fab);
        viewPager = (ViewPager) findViewById(R.id.viewpager);

        // ...... set up ViewPager ............

        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageSelected(int position) {
                if (position == 0) {
                    fab.setImageResource(android.R.drawable.ic_dialog_email);
                    fab.show();
                } else if (position == 2) {
                    fab.setImageResource(android.R.drawable.ic_dialog_map);
                    fab.show();
                } else {
                    fab.hide();
                }
            }

            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}

            @Override
            public void onPageScrollStateChanged(int state) {}
        });

        // Handle the FloatingActionButton click event:
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int position = viewPager.getCurrentItem();
                if (position == 0) {
                    openSend();
                } else if (position == 2) {
                    openMap();
                }
            }
        });

    }
}

Result:

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

FloatingActionButton:

* FloatingActionButton

* How to add the FAB to the layout

* Show and Hide FloatingActionButton on Swipe

* Show and Hide FloatingActionButton on Scroll

* Setting behaviour of FloatingActionButton

Table Of Contents

0 Getting Started

1 Layouts

2 Gradle

3 RecyclerView onClickListeners

4 NavigationView

5 Intent

6 JSON handling with org.json

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27 Camera 2 API

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32 ADB Android Debug Bridge

33 ButterKnife

34 Supporting different screen resolutions

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52 Tools Attributes

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58 The Manifest File

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61 Multidex and the Dex Method Limit

62 Data Synchronization with Sync Adapter

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72 Date and Time Pickers

73 Integrate Google Sign In

74 In-app billing

75 FloatingActionButton

76 ContentProvider

77 Dagger 2

78 Realm

79 Unit testing in Android with JUnit

80 Android Versions

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82 SensorManager

83 Localization with resources

84 ProgressBar

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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

93 Writing UI tests

94 GreenRobot EventBus

95 OkHttp

96 Enhancing Performance Using Icon Fonts

97 Handling Depp Links

98 Canvas drawing using SurfaceView

99 Firebase

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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

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115 Capturing Screenshots

116 MVP Architecture

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125 SearchView

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127 Callback URL

128 Twitter APIs

129 SqlCipher integration

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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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144 Email Validation

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149 CoordinatorLayout and Behaviors

150 EditText

151 Paypal Gateway Integration

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153 Firebase Crash Reporting

154 Displaying Google Ads

155 Vk SDK

156 Localized DateTime

157 Count Down Timer

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

170 Authenticator

171 RecyclerView and LayoutManagers

172 AudioManager

173 Job Scheduling

174 Accounts and AccountManager

175 OpenCV

176 Split Screen Multi-Screen Activities

177 Threads

178 MediaStore

179 Time Utils

180 Touch Events

181 Fingerprint API

182 MVVM Architecture

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184 ORMLite

185 YouTube API

186 TabLayout

187 Retrofit2 with RxJava

188 DayNight Theme AppCompat

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191 Using Jenkins CI

192 Zip files

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194 Fastlane

195 Define step value for RangeSeekBar

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

207 Firebase Cloud Messaging

208 Shared Element Transitions

209 Android Things

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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

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234 Context

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236 Secure SharedPreferences

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238 Bitmap Cache

239 Android x86 in VirtualBox

240 JCodec

241 Design Patterns

242 Okio

243 Google SignIn integration

244 TensorFlow

245 Game developmen

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247 Bluetooth Low Energy (LE)

248 Leak Canary

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251 Enhancing Alert Dialogs

252 Hardware Button Events, Intents PTT

253 SpannableString

254 Looper

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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