Slide a layout up from bottom of screen

Question

I have a layout hidden from the view. On a button click I want it to slide up from the bottom pushing the entire screen contents upwards, very similar to how whatsapp shows emoticons panel in chat screen.

I have seen SlidingDrawer, that dosen't work for me. It requires an image as an handle which is shown at the center of the screen, I don't want that. It also slides over the existing screen content, I am looking for a way to move the existing content upwards.

Update 1:

I tried using the animations as suggested by Sanket Kachhela. But the hidden layout is never shown. Here is the code.

Layout (activity_main.xml):

<RelativeLayout
    android:id="@+id/main_screen"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" 
        android:layout_alignParentTop="true"/>

     <TextView
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="@string/hello_world" 
       android:layout_centerInParent="true"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Slide up / down"
        android:layout_alignParentBottom="true" 
        android:onClick="slideUpDown"/>

</RelativeLayout>

<RelativeLayout
    android:id="@+id/hidden_panel"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:layout_below="@id/main_screen">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/app_name" />

</RelativeLayout>

Activity (MainActivity.java):

package com.example.slideuplayout;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;

public class MainActivity extends Activity {

private ViewGroup hiddenPanel;
private boolean isPanelShown;

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

    hiddenPanel = (ViewGroup)findViewById(R.id.hidden_panel);
    hiddenPanel.setVisibility(View.INVISIBLE);
    isPanelShown = false;
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

public void slideUpDown(final View view) {
    if(!isPanelShown) {
        // Show the panel
        Animation bottomUp = AnimationUtils.loadAnimation(this,
                R.anim.bottom_up);

        hiddenPanel.startAnimation(bottomUp);
        hiddenPanel.setVisibility(View.VISIBLE);
        isPanelShown = true;
    }
    else {
        // Hide the Panel
        Animation bottomDown = AnimationUtils.loadAnimation(this,
                R.anim.bottom_down);

        hiddenPanel.startAnimation(bottomDown);
        hiddenPanel.setVisibility(View.INVISIBLE);
        isPanelShown = false;
    }
}

}

Animations:

bottom_up.xml:

<?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
       android:fromYDelta="75%p"
       android:toYDelta="0%p"
       android:fillAfter="true"
       android:duration="500" />
</set>

bottom_down.xml:

<?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android">
<translate 
    android:fromYDelta="0%p" 
    android:toYDelta="100%p" 
    android:fillAfter="true"
    android:interpolator="@android:anim/linear_interpolator"
    android:duration="500" />
</set>

Any ideas how this can be done ?

Thanks.

Answer 1

Use these animations:

bottom_up.xml

<?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android">
   <translate android:fromYDelta="75%p" android:toYDelta="0%p" 
    android:fillAfter="true"
 android:duration="500"/>
</set>

bottom_down.xml

 <?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android">

<translate android:fromYDelta="0%p" android:toYDelta="100%p" android:fillAfter="true"
            android:interpolator="@android:anim/linear_interpolator"
    android:duration="500" />

</set>

Use this code in your activity for hiding/animating your view:

Animation bottomUp = AnimationUtils.loadAnimation(getContext(),
            R.anim.bottom_up);
ViewGroup hiddenPanel = (ViewGroup)findViewById(R.id.hidden_panel);
hiddenPanel.startAnimation(bottomUp);
hiddenPanel.setVisibility(View.VISIBLE);

Answer 2

You were close. The key is to have the hidden layout inflate to match_parent in both height and weight. Simply start it off as View.GONE. This way, using the percentage in the animators works properly.

Layout (activity_main.xml):

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/main_screen"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:text="@string/hello_world" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="@string/hello_world" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:onClick="slideUpDown"
        android:text="Slide up / down" />

    <RelativeLayout
        android:id="@+id/hidden_panel"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:visibility="gone" >

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/app_name"
            android:layout_centerInParent="true"
            android:onClick="slideUpDown" />
    </RelativeLayout>

</RelativeLayout>

Activity (MainActivity.java):

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;

public class OffscreenActivity extends Activity {
    private View hiddenPanel;

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

        hiddenPanel = findViewById(R.id.hidden_panel);
    }

    public void slideUpDown(final View view) {
        if (!isPanelShown()) {
            // Show the panel
            Animation bottomUp = AnimationUtils.loadAnimation(this,
                    R.anim.bottom_up);

            hiddenPanel.startAnimation(bottomUp);
            hiddenPanel.setVisibility(View.VISIBLE);
        }
        else {
            // Hide the Panel
            Animation bottomDown = AnimationUtils.loadAnimation(this,
                    R.anim.bottom_down);

            hiddenPanel.startAnimation(bottomDown);
            hiddenPanel.setVisibility(View.GONE);
        }
    }

    private boolean isPanelShown() {
        return hiddenPanel.getVisibility() == View.VISIBLE;
    }

}

Only other thing I changed was in bottom_up.xml. Instead of

android:fromYDelta="75%p"

I used:

android:fromYDelta="100%p"

But that's a matter of preference, I suppose.

Answer 3

You just need to add some line in your app, please find it from below link:

Show and hide a View with a slide up/down animation

Just add an animation to your layout like this:

mLayoutTab.animate()
  .translationYBy(120)
  .translationY(0)
  .setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));