CODEWITHSUNDEEP
javaandroidandroid-layout
Mike Kng
Mike Kng

Reputation: 285

android - collapsing toolbar and fragment layout not working together

In my app I have two fragments and a MainActivity. The activity_main.xml contains a collapsing toolbar which works perfectly for me when the fragments are empty. In my first fragment I fetch json data from a server and put it into a listview inside the fragment activity. The data is fetched and shown correctly, but the listview takes the whole screen and my collapsing toolbar seems to be a little buggy, like sometimes it pops up and disappears and my listview is not scrollable anymore. The two activities aren’t working together at all. Is there a way to make them work together? My activity_main.xml:

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">


        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:expandedTitleGravity="center|bottom"
            app:expandedTitleMarginBottom="56dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:toolbarId="@+id/toolbar">


            <ImageView
                android:id="@+id/backg"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/backthree"
                app:layout_collapseMode="parallax" />


            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?android:attr/actionBarSize"
                android:layout_marginBottom="48dp"
                android:gravity="right"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />


        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        android:id="@+id/frame_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/navigation"
        android:animateLayoutChanges="true">


        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="@android:color/white"
            android:text="TextView" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:textColor="@android:color/white"
            android:text="TextView" />

    </FrameLayout>

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </RelativeLayout>

    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_gravity="bottom"
        android:background="@android:color/white"
        app:itemIconTint="@android:color/darker_gray"
        app:itemTextColor="@android:color/darker_gray"
        app:menu="@menu/navigation" >

    </android.support.design.widget.BottomNavigationView>

</android.support.design.widget.CoordinatorLayout>

My fragment_first.xml:

<RelativeLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorGrayHell"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp">

        <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/swipe_refresh_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context=".MainActivity">

            <ListView
                android:id="@+id/list"
                android:layout_marginLeft="7dp"
                android:layout_marginRight="7dp"
                android:layout_marginTop="10dp"
                android:layout_width="fill_parent"
                android:background="@android:color/white"
                android:dividerHeight="10dp"
                android:divider="@color/colorGrayHell"
                android:layout_height="wrap_content" />

        </android.support.v4.widget.SwipeRefreshLayout>

    </RelativeLayout>

</RelativeLayout>

Upvotes: 1

Views: 1827

Answers (2)

Yogesh Nikam Patil
Yogesh Nikam Patil

Reputation: 1280

<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/background_light"
    android:fitsSystemWindows="true">

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#fcfcfc"
            android:gravity="center"
            android:orientation="vertical"
            android:padding="10dp">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Yogesh" />
        </LinearLayout>

    </androidx.core.widget.NestedScrollView>

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/main.appbar"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/main.collapsing"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginEnd="64dp"
            app:expandedTitleMarginStart="48dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/main.backdrop"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/bg1"
                app:layout_collapseMode="parallax" />

            <androidx.appcompat.widget.Toolbar
                android:id="@+id/main.toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:visibility="gone"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:title="Test"

                />
        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

Use this code. And also you need to change color of tollbar which swutching fragment.

toolbar.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.transparent));
                    mFragmentToSet = new HomeDashboardFragment();

Upvotes: 0

Ovidiu
Ovidiu

Reputation: 8714

You haven't mentioned where the fragments are attached - I assume within the NestedScrollView? If not, that's where they should go.

The problem is most likely the ListView within the fragment - unlike a RecyclerView, it does not implement NestedScrollingChild2 and ScrollingView, which are required for the collapsing toolbar functionality.

Replace the ListView with a RecyclerView and make sure the fragments are within the NestedScrollView that has app:layout_behavior="@string/appbar_scrolling_view_behavior" and it should work.

Upvotes: 1

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