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androidandroid-layoutandroid-fragmentsandroid-linearlayoutfloating-action-button

Put the Floating action button on Top always

I have Mainactivity, one Fragment and BlogRecycleadapter to populate the Fragment with Blog post.

Inside Mainactivity, I have Floating action Button. But When I run the app It hides beneath the items of blogRecycleadapter.

How can I make Floating action button always on Top??

enter image description here

My mainactivity layout is

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context=".Main2Activity">

    <android.support.v7.widget.Toolbar
        android:id="@+id/main_toolbar"
        app:titleTextAppearance="@style/Toolbar.TitleText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorPrimary"
        android:theme="@style/ThemeOverlay.AppCompat.Light"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"></android.support.v7.widget.Toolbar>



    <android.support.design.widget.BottomNavigationView
        android:id="@+id/mainBottomNav"
        android:background="@color/colorblog"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:menu="@menu/bottom_menu"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/add_post_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:clickable="true"
        android:layout_gravity="bottom|end"
        android:focusable="true"
        android:visibility="visible"
        app:elevation="6dp"
        app:layout_constraintBottom_toTopOf="@+id/mainBottomNav"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@mipmap/action_add" />


    <FrameLayout
        android:id="@+id/main_container"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@+id/mainBottomNav"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/main_toolbar"
        app:layout_constraintVertical_bias="1.0">

    </FrameLayout>

</android.support.constraint.ConstraintLayout>

and my fragment layout is ,

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeFragment">

    <!-- TODO: Update blank fragment layout -->

    <android.support.v7.widget.RecyclerView
        android:id="@+id/blog_list_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

and my blogRecycleadapter class is

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/main_blog_post"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:padding="20dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/blog_like_btn"
                android:layout_width="32dp"
                android:layout_height="32dp"
                android:layout_marginBottom="8dp"
                android:layout_marginStart="16dp"
                android:layout_marginLeft="16dp"
                android:layout_marginTop="8dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/blog_desc"
                app:srcCompat="@mipmap/action_like_gray" />

            <de.hdodenhof.circleimageview.CircleImageView
                android:id="@+id/blog_user_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="16dp"
                android:layout_marginTop="16dp"
                android:src="@drawable/profile_placeholder"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/blog_user_name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="16dp"
                android:text="Username"
                android:textStyle="bold"
                app:layout_constraintStart_toEndOf="@+id/blog_user_image"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/blog_date"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:text="Blog Post Date"
                app:layout_constraintStart_toEndOf="@+id/blog_user_image"
                app:layout_constraintTop_toBottomOf="@+id/blog_user_name" />

            <ImageView
                android:id="@+id/blog_image"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:scaleType="centerCrop"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/blog_user_image"
                app:srcCompat="@drawable/image_placeholder" />

            <TextView
                android:id="@+id/blog_desc"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginEnd="16dp"
                android:layout_marginStart="16dp"
                android:layout_marginTop="16dp"
                android:text="Lorem ipsum dolor sit amet, soluta regione urbanitas vis in, qui elit populo ut. "
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/blog_image" />

            <TextView
                android:id="@+id/blog_like_count"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:text="0 Likes"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toEndOf="@+id/blog_like_btn"
                app:layout_constraintTop_toBottomOf="@+id/blog_desc" />




        </android.support.constraint.ConstraintLayout>
    </android.support.v7.widget.CardView>

</android.support.constraint.ConstraintLayout>

Solution

  • Try This for you mainactivity layout:

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <android.support.v7.widget.Toolbar
            android:id="@+id/main_toolbar"
            app:titleTextAppearance="@style/TextAppearance.AppCompat.Light.SearchResult.Title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:background="@color/colorPrimary"
            android:theme="@style/ThemeOverlay.AppCompat.Light" />

        <FrameLayout
            android:id="@+id/main_container"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        </FrameLayout>

        <android.support.design.widget.BottomNavigationView
            android:id="@+id/mainBottomNav"
            android:background="@color/list_background"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:menu="@menu/bottom_menu"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>
    
    <android.support.design.widget.FloatingActionButton
        android:id="@+id/add_post_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="?attr/actionBarSize"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:clickable="true"
        android:layout_gravity="bottom|end"
        android:focusable="true"
        android:visibility="visible"
        app:elevation="6dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@mipmap/ic_launcher" />

</android.support.constraint.ConstraintLayout>

    Hope this helps.