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How to Use FoldingCell Library in Android App?

  • Last Updated : 25 Aug, 2021
Geek Week

In this article, we are going to implement the FoldingCell feature. This feature can be used to show instructions on a page. Like when we create a quiz app then we can have this feature so that users can view the instruction whenever they wish to. Let’s see the implementation of this feature. A sample GIF is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Java language. 

Step by Step Implementation

Step 1: Create a New Project

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.

Step 2: Add dependency and JitPack Repository



Navigate to the Gradle Scripts > build.gradle(Module:app) and add the below dependency in the dependencies section.   

implementation ‘com.ramotion.foldingcell:folding-cell:1.2.3’

Step 3: Working with the activity_main.xml file

Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file. 

XML




<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false"
    android:clipToPadding="false"
    tools:context=".MainActivity">
 
    <com.ramotion.foldingcell.FoldingCell
        android:id="@+id/folding_cell"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
         
        <!--Add the Layout -->
        <LinearLayout
            android:id="@+id/cell_content_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/holo_green_dark"
            android:orientation="vertical"
            android:visibility="gone">
 
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/holo_blue_dark"
                android:gravity="center"
                android:text="About Geeks for Geeks"
                android:textSize="24dp" />
 
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/holo_blue_dark"
                android:gravity="center"
                android:text="It is a Computer Science portal for geeks. "
                android:textSize="24dp" />
             
        </LinearLayout>
         
        <!--Add the Layout -->
        <LinearLayout
            android:id="@+id/cell_title_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
 
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/holo_blue_dark"
                android:gravity="center"
                android:text="Geeks For Geeks"
                android:textSize="24dp" />
             
        </LinearLayout>
 
    </com.ramotion.foldingcell.FoldingCell>
     
</LinearLayout>

Step 4: Working with the MainActivity.java file

Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail. 

Java




import android.os.Bundle;
import android.view.View;
 
import androidx.appcompat.app.AppCompatActivity;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        final com.ramotion.foldingcell.FoldingCell fc = 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);
            }
        });
    }
}

Output: 

 

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