Code Quality Rank: L4
Programming language: Java
License: MIT License
Tags: Layout Widget    

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Expanding content cell with animation inspired by folding paper card material design.

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  • Android 4.0 IceCreamSandwich (API lvl 14) or greater
  • Your favorite IDE


​ Just download the package from here and add it to your project classpath, or just use the maven repo:




libraryDependencies += "com.ramotion.foldingcell" % "folding-cell" % "1.2.3"



Basic usage

  1. Add com.ramotion.foldingcell.FoldingCell to your layout ​ xml <com.ramotion.foldingcell.FoldingCell xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/folding_cell" android:layout_width="match_parent" android:layout_height="wrap_content"> ​ </com.ramotion.foldingcell.FoldingCell>
  2. Add exactly two child elements to your cell. The first child (content view) always represents the unfolded state layout and the second child (title view) represents folded state layout. Of course, those layouts can contain any number of child elements and they can be any complexity, but to work correctly, there are some limitations: content view height must be at least 2x times greater than title view height, and the height of each of those layouts must be set to android:layout_height="wrap_content". If you want to set exact height in dp , you can set height for child elements in your own layout inside content view or title view. Also, you need to hide your content view layout using android:visibility="gone". ​ xml <com.ramotion.foldingcell.FoldingCell xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/folding_cell" android:layout_width="match_parent" android:layout_height="wrap_content"> ​ <FrameLayout android:id="@+id/cell_content_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@android:color/holo_green_dark" android:visibility="gone"> <TextView android:layout_width="match_parent" android:layout_height="250dp" /> </FrameLayout> ​ <FrameLayout android:id="@+id/cell_title_view" android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:layout_width="match_parent" android:layout_height="100dp" android:background="@android:color/holo_blue_dark" /> </FrameLayout> ​ </com.ramotion.foldingcell.FoldingCell>
  3. Almost done! Two steps remain! For correct animation, you need to set up two properties on the root element(s) of your Folding Cell: ​ xml android:clipChildren="false" android:clipToPadding="false"
  4. Final step! Add onClickListener to your Folding Cell in MainActivity.java to toggle animation: ​ java @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ​ // get our folding cell final FoldingCell fc = (FoldingCell) findViewById(R.id.folding_cell); ​ // attach click listener to folding cell fc.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { fc.toggle(false); } }); }
  5. Extra step - customizing cell settings. For now, there are three main parameters - animation time, back side color and additional flips count. If first two do not cause questions, the third requires an some explanation. It is count of flips to be executed after first(main) flip. Default value is 0(auto choose). Also there is a fourth, additional parameter - camera height, it controls level(depth) of 3d effect. There are two ways to change cell settings: From xml layout file with res-auto namespace xmlns:folding-cell="http://schemas.android.com/apk/res-auto": xml folding-cell:animationDuration="1000" folding-cell:backSideColor="@color/bgBackSideColor" folding-cell:additionalFlipsCount="2" folding-cell:cameraHeight="30" Or from code: java // get our folding cell final FoldingCell fc = (FoldingCell) findViewById(R.id.folding_cell); // set custom parameters fc.initialize(1000, Color.DKGRAY, 2); // or with camera height parameter fc.initialize(30, 1000, Color.DKGRAY, 2); ​ You can find this and other, more complex, examples in this repository ​

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📄 License

Folding Cell is released under the MIT license. See [LICENSE](./LICENSE) for details.

This library is a part of a selection of our best UI open-source projects

If you use the open-source library in your project, please make sure to credit and backlink to www.ramotion.com

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Try this UI component and more like this in our Android app. Contact us if interested.

*Note that all licence references and agreements mentioned in the FoldingCell README section above are relevant to that project's source code only.