Android Sample that contains a ViewPager with a fixed footer below it. The footer should disappear when the last Fragment of the ViewPager is shown.

activity_detail.xml

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:text="@string/text_detail_placeholder"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"/>

</FrameLayout>

activity_main.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout_root"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/button_other_activity"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/text_button_other_activity"/>

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <FrameLayout
        android:id="@+id/layout_footer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/blue"
        android:padding="30dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:textColor="@android:color/white"
            android:text="@string/text_placeholder"/>
    </FrameLayout>

</LinearLayout>

Android Sample - TestViewPagerWithFixedFooter.md

TestViewPagerWithFixedFooter

See it in action on an Android 2.2 (API 8) emulator :

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="fr.pde.tests.testviewpagerwithfixedfooter.app" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="fr.pde.tests.testviewpagerwithfixedfooter.app.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="fr.pde.tests.testviewpagerwithfixedfooter.app.DetailActivity"
            android:label="@string/title_activity_detail"
            android:parentActivityName="fr.pde.tests.testviewpagerwithfixedfooter.app.MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="MainActivity" />
        </activity>
    </application>

</manifest>

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.+'
    }
}
apply plugin: 'android'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 19
    buildToolsVersion '19.0.3'

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:19.1.0'
    compile 'com.android.support:appcompat-v7:19.+'
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

DetailActivity.java

package fr.pde.tests.testviewpagerwithfixedfooter.app;

import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;


public class DetailActivity extends ActionBarActivity {

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

        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
    }
}

fragment_placeholder.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textview_placeholder"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"/>

</FrameLayout>

MainActivity.java

package fr.pde.tests.testviewpagerwithfixedfooter.app;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    SectionsPagerAdapter mSectionsPagerAdapter;
    ViewGroup mRootLayout;
    ViewPager mViewPager;
    View mFooterView;
    Button mOtherActivityButton;

    // ----------------------------------
    // ACTIVITY LIFECYCLE
    // ----------------------------------

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
        mRootLayout = (ViewGroup) findViewById(R.id.layout_root);
        mViewPager = (ViewPager) findViewById(R.id.pager);
        mFooterView = findViewById(R.id.layout_footer);
        mOtherActivityButton = (Button) findViewById(R.id.button_other_activity);
        mViewPager.setAdapter(mSectionsPagerAdapter);
        mViewPager.setOnPageChangeListener(new MyOnPageChangeListener());
        mOtherActivityButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this, DetailActivity.class));
            }
        });
    }

    // ----------------------------------
    // INNER CLASS
    // ----------------------------------

    public class SectionsPagerAdapter extends FragmentPagerAdapter {

        public SectionsPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            // getItem is called to instantiate the fragment for the given page.
            // Return a PlaceholderFragment (defined as a static inner class below).
            switch (position) {
                case 0:
                    return PlaceholderFragment.newInstance(position + 1, R.color.red);
                case 1:
                    return PlaceholderFragment.newInstance(position + 1, R.color.green);
                case 2:
                    return PlaceholderFragment.newInstance(position + 1, R.color.yellow);
            }
            return PlaceholderFragment.newInstance(position + 1, android.R.color.white);
        }

        @Override
        public int getCount() {
            return 3;
        }
    }

    private class MyOnPageChangeListener implements ViewPager.OnPageChangeListener {
        private int footerHeight = 0;

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            if (position == 1) {
                if (footerHeight <= 0) {
                    footerHeight = mFooterView.getHeight();
                }
                if (footerHeight > 0) {
                    int footerTranslation = (int) (2 * footerHeight * positionOffset);
                    if (footerTranslation > footerHeight) {
                        footerTranslation = footerHeight;
                    }
                    LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) mFooterView.getLayoutParams();
                    if (layoutParams.bottomMargin == -footerHeight) {
                        mFooterView.setVisibility(View.GONE);
                    }
                    if (footerTranslation < footerHeight && mFooterView.getVisibility() == View.GONE) {
                        mFooterView.setVisibility(View.VISIBLE);
                    }
                    if (mFooterView.getVisibility() == View.VISIBLE) {
                        layoutParams.bottomMargin = -footerTranslation;
                        mFooterView.setLayoutParams(layoutParams);
                        mRootLayout.invalidate();
                    }
                }
            }
        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    }

    public static class PlaceholderFragment extends Fragment {
        private static final String BUNDLE_KEY_POS = "BUNDLE_KEY_POS";
        private static final String BUNDLE_KEY_COLOR = "BUNDLE_KEY_COLOR";

        private TextView textView;

        public static PlaceholderFragment newInstance(int position, int color) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(BUNDLE_KEY_POS, position);
            args.putInt(BUNDLE_KEY_COLOR, color);
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View view = inflater.inflate(R.layout.fragment_placeholder, container, false);
            view.setBackgroundColor(getResources().getColor(getArguments().getInt(BUNDLE_KEY_COLOR)));
            textView = (TextView) view.findViewById(R.id.textview_placeholder);
            textView.setText(getString(R.string.text_placeholder_fragment, getArguments().getInt(BUNDLE_KEY_POS)));
            return view;
        }
    }
}

testviewpagerwithfixedbottom.gif

Found this in july, 2020 :) Thank you!