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I have two views on parent Layout those are top and bottom screens and bottom screen having fixed height and its align to parent-bottom and top screen based on content it must be extend and collapse on parent Layout when i tapped on it and bottom screen automatically come down from top screen and i can able to scroll total content on parent Layout can some one help me please

activity_main.layout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/content_frame"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <View
 android:id="@+id/view"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:layout_above="@+id/bottom_view"
 android:background="#3143ff" />

 <View
 android:id="@+id/bottom_view"
 android:layout_width="match_parent"
 android:layout_height="200dp"
 android:layout_alignParentBottom="true"
 android:background="@color/colorPrimary" />


</RelativeLayout>

MainActivity:

public class MainActivity extends AppCompatActivity 

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

 final View view = findViewById(R.id.view);
 final View contentView = findViewById(R.id.content_frame);
 view.setOnClickListener(v -> 
 final int screenHeight = contentView.getHeight();
 ValueAnimator heightAnimator = ValueAnimator.ofInt(view.getHeight(), screenHeight);
 heightAnimator.setDuration(1500);
 heightAnimator.addUpdateListener(animation -> 
 view.getLayoutParams().height = (int) animation.getAnimatedValue();
 view.requestLayout();
 );
 heightAnimator.start();
 );
 

See FoldingCell for Android for more help.

In your build.gradle()

dependencies
 implementation 'com.ramotion.foldingcell:folding-cell:1.2.2'

In you XML layout

<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">
​

 <!--Layout One--> ​

 <!--Layout Two-->


</com.ramotion.foldingcell.FoldingCell>

Almost done! Two steps remain! For correct animation, you need to set up two properties on the root element(s) of your Folding Cell: ​

android:clipChildren="false"

android:clipToPadding="false"

In your Java class

 // 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);
 
 );