An android library that brings the expandable layout with various animation. You can include optional contents and use everywhere.
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Expandable Layout

An android library that brings the expandable layout with various animation. You can include optional contents and use everywhere.

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Preview

Normal

ExpandableRelativeLayout ExpandableWeightLayout

Example

ExampleRecyclerView ExampleSearch ExampleReadMore

Usage

ExpandableRelativeLayout

Usage

The expandableRelativeLayout doesn't work if child views change a size. You should use the ExpandableLinearLayout if there is a possibility.

Code

ExpandableRelativeLayout expandableLayout
 = (ExpandableRelativeLayout) findViewById(R.id.expandableLayout);

// toggle expand, collapse
expandableLayout.toggle();
// expand
expandableLayout.expand();
// collapse
expandableLayout.collapse();

// move position of child view
expandableLayout.moveChild(0);
// move optional position
expandableLayout.move(500);

// set base position which is close position
expandableLayout.setClosePosition(500);

Layout xml

add xmlns:app="http://schemas.android.com/apk/res-auto"

<com.github.aakira.expandablelayout.ExpandableRelativeLayout
    android:id="@+id/expandableLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:ael_expanded="false"
    app:ael_duration="500"
    app:ael_interpolator="bounce"
    app:ael_orientation="vertical">

    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="sample" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/text"
        android:text="sample2" />
</com.github.aakira.expandablelayout.ExpandableRelativeLayout>

ExpandableLinearLayout

Usage

You should use the ExpandableLinearLayout if child views may change a size. For example, it gets and sets values from a server. And you should use this in recycler view.

Code

// resize expandable layout

ExpandableLinearLayout expandableLayout
 = (ExpandableLinearLayout) findViewById(R.id.expandableLayout);

child.setText("Sets text from a server");
expandableLayout.initLayout(); // Recalculate size of children

// recycler view
// you must set a ViewHolder#setIsRecyclable(false) and ExpandableLinearLayout#setInRecyclerView(true) 

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    holder.setIsRecyclable(false);
    holder.expandableLinearLayout.setInRecyclerView(true);
}

ExpandableWeightLayout

Usage

You should use this layout if you want to use weight attributes at expandable layout.

Code

ExpandableWeightLayout expandableLayout
 = (ExpandableWeightLayout) findViewById(R.id.expandableLayout);

// toggle expand, collapse
expandableLayout.toggle();
// expand
expandableLayout.expand();
// collapse
expandableLayout.collapse();

Layout xml

add xmlns:app="http://schemas.android.com/apk/res-auto"

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <com.github.aakira.expandablelayout.ExpandableWeightLayout
        android:id="@+id/expandableLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3"
        app:ael_duration="1000"
        app:ael_interpolator="anticipateOvershoot">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:src="@drawable/sample" />
    </com.github.aakira.expandablelayout.ExpandableWeightLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>
</LinearLayout>

Listener

expandableLayout.setListener(new ExpandableLayoutListener() {
    @Override
    public void onAnimationStart() {
    }

    @Override
    public void onAnimationEnd() {
    }

    // You can get notification that your expandable layout is going to open or close.
    // So, you can set the animation synchronized with expanding animation.
    @Override
    public void onPreOpen() {
    }

    @Override
    public void onPreClose() {
    }

    @Override
    public void onOpened() {
    }

    @Override
    public void onClosed() {
    }
});
  • ExpandableLayoutListenerAdapter
  • You can set listeners only you need.
expandableLayout.setListener(new ExpandableLayoutListenerAdapter() {
    @Override
    public void onPreOpen() {
    }

    @Override
    public void onPreClose() {
    }
});

Attributes

attribute name description
ael_duration The length of the expand or collapse animation
ael_expanded The layout is expanded if you set true
ael_defaultChildIndex The layout is expanded at index of child view. (Only ExpandableRelativeLayout)
ael_defaultPosition The layout is expanded at the position. (Only ExpandableRelativeLayout)
ael_orientation The orientation of animation(horizontal | vertical)
ael_interpolator Sets interpolator

Interpolator

You can use interpolator. It helps the layout animates easily.

Interpolator value name of attribute
AccelerateDecelerateInterpolator accelerateDecelerate
AccelerateInterpolator accelerate
AnticipateInterpolator anticipate
AnticipateOvershootInterpolator anticipateOvershoot
BounceInterpolator bounce
DecelerateInterpolator decelerate
FastOutLinearInInterpolator fastOutLinearIn
FastOutSlowInInterpolator fastOutSlowIn
LinearInterpolator linear
LinearOutSlowInInterpolator linearOutSlowIn
OvershootInterpolator overshoot

These are support interpolator. But a case that the expandable layout extends outside doesn't work. e.g. AnticipateInterpolator, AnticipateOvershootInterpolator, OvershootInterpolator I recommend you use such a interpolator for child views in the expandable layout.

  • Not support
  • CycleInterpolator
  • PathInterpolator

Setup

Gradle

Add the dependency in your build.gradle

buildscript {
	repositories {
		jcenter()
	}
}

dependencies {
	compile 'com.github.aakira:expandable-layout:1.6.0@aar'
}

Author

Akira Aratani

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License

Copyright (C) 2015 A.Akira

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.