ExpandableView


Source link: https://github.com/nicolasjafelle/ExpandableView

ExpandableView

ExpandableView is a View showing only a content and when clicked on it, it displays more content in a fashion way. You can add views or viewgroups but remember that it will only display the content in a LinearLayout with vertical orientation.

You can choose by default a "chevron" icon animation or a "plus" icon animation. The "always visible row" has a left icon, a text and finally a right icon which will be the animated one.

Instructions - Maven Central

  1. Add this library in your build.gradle:
dependencies {

  compile 'com.github.nicolasjafelle:expandableview:1.0' 
}

Instructions

  1. Clone the git repo
  2. Import the "ExpandableView" module into your Android-gradle project.
  3. Add "ExpandableView" module in your settings.gradle
  4. DONE

How to Use it

As any view in Android you can add it by code or by layout xml file but remember that if you want to change the default height of the visible content you need to use:

topExpandableView.setVisibleLayoutHeight(300);
 topExpandableView.setVisibleLayoutHeight(getResources().getDimensionPixelSize(R.dimen.new_height));

Remember also to fill the information inside the visible content by using:

expandableView.fillData(R.drawable.ic_android, R.string.android_names, true);
 //or expandableView.fillData(R.drawable.ic_android, getString(R.string.android_names), true);
 //or expandableView.fillData(R.drawable.ic_android, R.string.android_names, true);
 //or expandableView.fillData(R.drawable.ic_android, getString(R.string.android_names));
 //or expandableView.fillData(R.drawable.ic_android, R.string.android_names);
  //or expandableView.fillData(0, R.string.android_names);
 // No drawable left by passing 0.

If you want to add content into the discoverable LinearLayout simple use:

expandableView.addContentView(itemView);
 // itemView could be a simple TextView or more complex custom views

The most relevant part of this ExpandableView is when you want to include an ExpandableView into another ExpandableView, you need to pass the parent's View hierarchy, like this:

expandableViewLevel1.setOutsideContentLayout(topExpandableView.getContentLayout());
 // 1 Level expandableViewLevel2.setOutsideContentLayout(topExpandableView.getContentLayout(), expandableViewLevel1.getContentLayout());
 // 2 Levels expandableViewLevel3.setOutsideContentLayout(topExpandableView.getContentLayout(), expandableViewLevel1.getContentLayout(), expandableViewLevel2.getContentLayout());
 // 3 Levels

Also remember to use this package in your layout files:

<com.expandable.view.ExpandableView  android:id="@+id/activity_main_top_expandable_view"  android:layout_width="match_parent"  android:layout_height="wrap_content"/> 

You can also customize the TextView inside the visible Content Layout in this way:

<!-- Use this style name to override the default style --> <style name="ExpandableView_TextView">  <item name="android:textSize">18sp</item>  <item name="android:textStyle">bold</item>  <item name="android:textColor">@android:color/black</item> </style> 

Developed By

License

Copyright 2015 Nicolas Jafelle  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. 

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