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https://github.com/roughike/BottomBar

(Deprecated) A custom view component that mimics the new Material Design Bottom Navigation pattern.
https://github.com/roughike/BottomBar

android bottom-navigation java library material-design

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(Deprecated) A custom view component that mimics the new Material Design Bottom Navigation pattern.

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README 

        
# BottomBar (Deprecated)



I don't have time to maintain this anymore. I basically wrote the whole library in a rush, without tests, while being a serious expert beginner at the time. As a result, there's a lot of unpredictable moving parts and the tests probably aren't that great either. Don't really know, since I haven't touched this in ages.



I'd recommend you to use the official BottomNavigationView from Google and urge them to implement the features you need. Or use another 3rd party library.



[![Build Status](https://travis-ci.org/roughike/BottomBar.svg?branch=master)](https://travis-ci.org/roughike/BottomBar) [![Coverage Status](https://coveralls.io/repos/github/roughike/BottomBar/badge.svg?branch=development)](https://coveralls.io/github/roughike/BottomBar?branch=master) [![Download](https://api.bintray.com/packages/roughike/maven/bottom-bar/images/download.svg)](https://bintray.com/roughike/maven/bottom-bar/_latestVersion)



  



## Version 2.0 released!



[The latest version before that can be found in the v1 branch](https://github.com/roughike/BottomBar/tree/v1)



* Cleaner code and better APIs

* No more unnecessary stuff or spaghetti mess

* Now the look, feel and behavior is defined in XML, as it should be

* No more nasty regressions, thanks to the automated tests

* **Everything is a little different compared to earlier, but it's for the greater good!**



[How to contribute](https://github.com/roughike/BottomBar/blob/master/README.md#contributions)



[Changelog](https://github.com/roughike/BottomBar/blob/master/CHANGELOG.md)



## What?



A custom view component that mimics the new [Material Design Bottom Navigation pattern](https://www.google.com/design/spec/components/bottom-navigation.html).



## Does it work on my Grandpa Gary's HTC Dream?



Nope. The minSDK version is **API level 11 (Honeycomb).**



## Gimme that Gradle sweetness, pls?



```groovy

compile 'com.roughike:bottom-bar:2.3.1'

```



**Maven:**

```xml



  com.roughike

  bottom-bar

  2.3.1

  pom



```



## How?



You can add items by **writing a XML resource file**.



### Creating the icons



The icons must be fully opaque, solid black color, 24dp and **with no padding**. For example, [with Android Asset Studio Generic Icon generator](https://romannurik.github.io/AndroidAssetStudio/icons-generic.html), select "TRIM" and make sure the padding is 0dp. Here's what your icons should look like:



![Sample icons](https://raw.githubusercontent.com/roughike/BottomBar/master/graphics/icons-howto.png)



### Adding items from XML resource



Define your tabs in an XML resource file.



**res/xml/bottombar_tabs.xml:**



```xml



    

    

    



```



Then, add the BottomBar to your layout and give it a resource id for your tabs xml file.



**layout/activity_main.xml**



```xml



    

    



    



```



### Setting up listeners



By default, the tabs don't do anything unless you listen for selection events and do something when the tabs are selected.



**MainActivity.java:**



```java

public class MainActivity extends Activity {

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        BottomBar bottomBar = (BottomBar) findViewById(R.id.bottomBar);

        bottomBar.setOnTabSelectListener(new OnTabSelectListener() {

            @Override

            public void onTabSelected(@IdRes int tabId) {

                if (tabId == R.id.tab_favorites) {

                    // The tab with id R.id.tab_favorites was selected,

                    // change your content accordingly.

                }

            }

        });

    }

}

```



If you want to listen for reselection events, here's how you do it:



```java

bottomBar.setOnTabReselectListener(new OnTabReselectListener() {

    @Override

    public void onTabReSelected(@IdRes int tabId) {

        if (tabId == R.id.tab_favorites) {

            // The tab with id R.id.tab_favorites was reselected,

            // change your content accordingly.

        }

    }

});

```



### Intercepting tab selections



If you want to conditionally cancel selection of any tab, you absolutely can. Just assign a ```TabSelectionInterceptor``` to the BottomBar, and return true from the ```shouldInterceptTabSelection()``` method.



```java

bottomBar.setTabSelectionInterceptor(new TabSelectionInterceptor() {

    @Override

    public boolean shouldInterceptTabSelection(@IdRes int oldTabId, @IdRes int newTabId) {

        if (newTabId == R.id.tab_pro_feature && !userHasProVersion()) {

          startProVersionPurchaseFlow();

          return true;

        }

        

        return false;

    }

});

```



### Changing icons based on selection state



If you want to have different icon when a specific tab is selected, just use state list drawables.



**res/drawable/my_tab_icon.xml**



```xml



    

    



```



**res/xml/bottombar_tabs.xml**



```xml

...



...

```



### Those color changing tabs look dope. Howdoidodat?



Just add ```barColorWhenSelected``` to each tab. When that tab is selected, the whole BottomBar background color is changed with a nice animation.



**res/xml/bottombar_tabs.xml**



```xml



    

    



```



### How do I draw it under the navbar?



First, define a style that is a child of your main application theme:



**res/values-v21/styles.xml**



```xml



    <item name="android:navigationBarColor">@android:color/transparent</item>

    <item name="android:windowTranslucentNavigation">true</item>

    <item name="android:windowDrawsSystemBarBackgrounds">true</item>



```



You'll also have to **make a stub version of the same theme** to avoid crashes in previous API levels than Lollipop:



**res/values/styles.xml**



```xml



```



Also include the same stub in your ```values-land-v21.xml``` to avoid transparent navbar and weird behavior on landscape.



**res/values-land-v21.xml:**



```xml



```



Apply the theme in ```AndroidManifest.xml``` for your Activity.



**AndroidManifest.xml:**



```xml



```



Finally, set ```bb_behavior``` to include the ```underNavbar``` flag and you're good to go!



**activity_my_awesome.xml:**



```xml



```



### What about Tablets?



Specify a different layout for your activity in ```res/layout-sw600dp``` folder and set ```bb_tabletMode``` to true.



**res/layout-sw600dp/activity_main.xml:**



```xml



    



    

    



```



### How do I hide it automatically on scroll?



Easy-peasy!



**activity_main.xml:**



```xml



    



        



    



    



```



### Badges



You can easily add badges for showing an unread message count or new items / whatever you like.



```java

BottomBarTab nearby = bottomBar.getTabWithId(R.id.tab_nearby);

nearby.setBadgeCount(5);



// Remove the badge when you're done with it.

nearby.removeBadge/();

```



## All customization options



### For the BottomBar



```xml



```





    
bb_tabXmlResource


    
the XML Resource id for your tabs, that reside in values/xml/



    
bb_tabletMode


    
if you want the BottomBar to behave differently for tablets. There's an example of this in the sample project!


    
bb_behavior


    


shifting: the selected tab is wider than the rest. shy: put the BottomBar inside a CoordinatorLayout and it'll automatically hide on scroll! underNavbar: draw the BottomBar under the navBar!


    
bb_inActiveTabAlpha


    
the alpha value for inactive tabs, that's used in the tab icons and titles.


    
bb_activeTabAlpha


    
the alpha value for active tabs, that's used in the tab icons and titles.


    
bb_inActiveTabColor


    
the color for inactive tabs, that's used in the tab icons and titles.


    
bb_activeTabColor


    
the color for active tabs, that's used in the tab icons and titles.


    
bb_badgeBackgroundColor


    
the background color for any Badges in this BottomBar.


    
bb_badgesHideWhenActive


    
whether badges should be hidden for active tabs, defaults to true.


    
bb_titleTextAppearance


    
custom textAppearance for the titles


    
bb_titleTypeFace


    
path for your custom font file, such as fonts/MySuperDuperFont.ttf. In that case your font path would look like src/main/assets/fonts/MySuperDuperFont.ttf, but you only need to provide fonts/MySuperDuperFont.ttf, as the asset folder will be auto-filled for you.


    
bb_showShadow


    
controls whether the shadow is shown or hidden, defaults to true.





### For the tabs



```xml



```





    
inActiveColor


    
the color for inactive tabs, that's used in the tab icons and titles.


    
activeColor


    
the color for active tabs, that's used in the tab icons and titles.


    
barColorWhenSelected


    
the color that the whole BottomBar should be when selected this tab.


    
badgeBackgroundColor


    
the background color for any Badges in this tab.


    
badgeHidesWhenActive


    
whether or not the badge should be hidden when this tab is selected, defaults to true.


    


    





## Apps using BottomBar



  * [Nearby](https://play.google.com/store/apps/details?id=com.synergetechsolutions.nearbylive) : A location-based social networking app with over 5 million users.

  * [FragNav](https://github.com/ncapdevi/FragNav) : An Android Library for managing multiple stacks of Fragments. BottomBar is used in the sample app.

  * [BottomNavigationBar](https://github.com/pocheshire/BottomNavigationBar) : BottomBar ported to C# for Xamarin developers

  * [KyudoScoreBookTeam](https://play.google.com/store/apps/details?id=com.bowyer.app.android.kyudoscoreteam&hl=en) : BottomBar is used in the KyudoScoreBookTeam app.

  * [memeham](https://play.google.com/store/apps/details?id=com.memeham.beyourself.memeham) : BottomBar is used in the memeham app.

  * [NewsCatchr](https://play.google.com/store/apps/details?id=jlelse.readit) : A newsreader app, which uses this BottomBar library.

  * [GitSkarios](https://play.google.com/store/apps/details?id=com.alorma.github) : A Github android App, to visit your repositories, gists and  more!

    * [Code](https://github.com/gitskarios/Gitskarios)

  

Send me a pull request with modified README.md to get a shoutout!



## Contributions



Feel free to create issues and pull requests.



When creating pull requests, **more is more:** I'd like to see ten small pull requests separated by feature rather than all those combined into a huge one.



## License



```

BottomBar library for Android

Copyright (c) 2016 Iiro Krankka (http://github.com/roughike).



Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at



http://www.apache.org/licenses/LICENSE-2.0



Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

```