mzgreen

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.opengl.EGL14;
import android.opengl.EGLExt;
import android.opengl.GLDebugHelper;
import android.opengl.GLSurfaceView;
import android.os.Trace;
import android.util.AttributeSet;
import android.util.Log;
import android.view.TextureView;

mzgreen

class SizeHelper @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : ConstraintHelper(context, attrs, defStyleAttr) {

    private val screenHeight: Int = resources.displayMetrics.heightPixels
    private val screenWidth: Int = resources.displayMetrics.widthPixels
    
    private var layoutConstraintScreenHeightPercent = UNSPECIFIED_CONSTRAINT_SCREEN_PERCENT

mzgreen

public class ScrollingSwipeRefreshLayoutBehavior extends AppBarLayout.ScrollingViewBehavior {

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) {
        return super.layoutDependsOn(parent, child, dependency) || (dependency instanceof AppBarLayout);
    }

    @Override
    public boolean onDependentViewChanged(CoordinatorLayout parent, View child, View dependency) {
        boolean returnValue = super.onDependentViewChanged(parent, child, dependency);

mzgreen

<android.support.design.widget.FloatingActionButton
   android:id="@+id/fabButton"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_gravity="end|bottom"
   android:layout_margin="@dimen/fab_margin"
   android:src="@drawable/ic_favorite_outline_white_24dp"
   app:borderWidth="0dp"
   app:layout_behavior="pl.michalz.hideonscrollexample.ScrollingFABBehavior" />

mzgreen

public class ScrollingFABBehavior extends CoordinatorLayout.Behavior<FloatingActionButton> {
    private int toolbarHeight;

    public ScrollingFABBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.toolbarHeight = Utils.getToolbarHeight(context);
    }

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, FloatingActionButton fab, View dependency) {

mzgreen

<android.support.design.widget.FloatingActionButton
   android:id="@+id/fabButton"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_gravity="end|bottom"
   android:layout_margin="@dimen/fab_margin"
   android:src="@drawable/ic_favorite_outline_white_24dp"
   app:borderWidth="0dp" />

mzgreen

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    app:layout_scrollFlags="scroll|enterAlways" />

mzgreen

<android.support.v4.view.ViewPager
   android:id="@+id/viewPager"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

mzgreen

private void initViewPagerAndTabs() {
   ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
   PagerAdapter pagerAdapter = new PagerAdapter(getSupportFragmentManager());
   pagerAdapter.addFragment(PartThreeFragment.createInstance(20), getString(R.string.tab_1));
   pagerAdapter.addFragment(PartThreeFragment.createInstance(4), getString(R.string.tab_2));
   viewPager.setAdapter(pagerAdapter);
   
   TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
   tabLayout.setupWithViewPager(viewPager);
}

mzgreen

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:id="@+id/coordinatorLayout"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   
    <android.support.design.widget.AppBarLayout
            android:id="@+id/appBarLayout"