Add An Actionbar For Each Fragment

Suppose I have 4 fragments that I put in mainActivity, I want to create different actionbar different in each frgament. When I press fragment 1 then the actionBar appears fragment

Solution 1:

Yes, you can add the custom toolbar to your fragment and make your activity theme with no action bar in the Manifest and do something like this. this layout may be your fragment layout and inflate in your activity.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?actionBarSize"
    android:layout_alignParentTop="true"
    android:background="@color/colorPrimary"
    android:gravity="top"
    app:titleTextColor="@color/white">

    <ImageView
        android:id="@+id/iv_home"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="left"
        android:contentDescription="TODO"
        android:visibility="visible"
        app:srcCompat="@drawable/ic_back" />

    <TextView
        android:id="@+id/toolbar_title"
        style="@style/TextAppearance.AppCompat.Widget.ActionBar.Title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="List Entry"
        android:textColor="@color/white"
        android:textSize="@dimen/large_text_size" />

    <ImageView
        android:id="@+id/iv_add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:layout_margin="@dimen/middium_padding"
        android:contentDescription="TODO"

        android:src="@mipmap/add"
        android:visibility="visible" />

</android.support.v7.widget.Toolbar>


</RelativeLayout>

and access you toolbar with framgment view.

Solution 2:

In this scenario you usually have:

• Activity and layout that owns and contains Fragments, let us call them FragmentOwnerActivity.kt and fragment_owner_layout.xml
• A class derived from Fragment and a layout associated with it, let us call them MyFragment.kt and my_fragment_layout.xml

To enable toolbars in your fragments you'll need to put the following to my_fragment_layout.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayoutxmlns: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:id="@+id/someid"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MyFragment"><android.support.design.widget.AppBarLayoutandroid:id="@+id/appbar"android:layout_width="match_parent"android:layout_height="wrap_content"app:layout_constraintStart_toStartOf="parent"android:layout_marginStart="0dp"app:layout_constraintTop_toTopOf="parent"android:layout_marginTop="0dp"
    ><android.support.v7.widget.Toolbarandroid:id="@+id/my_toolbar"android:layout_width="match_parent"android:layout_height="@attr/actionBarSize"android:background="@attr/colorPrimary"android:contentInsetEnd="0dp"android:contentInsetLeft="0dp"android:contentInsetRight="0dp"android:contentInsetStart="0dp"android:elevation="2dp"app:contentInsetEnd="0dp"app:contentInsetLeft="0dp"app:contentInsetRight="0dp"app:contentInsetStart="0dp"

        ><TextViewandroid:id="@+id/toolbar_title"android:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center"android:text="@string/toolbar_title"android:textSize="22sp"android:textStyle="bold" /></android.support.v7.widget.Toolbar>

In MyFragment.kt you'll need to enable the toolbar:

overridefunonActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    (activity as AppCompatActivity).setSupportActionBar(view?.findViewById(R.id.my_toolbar))

In FragmentOwnerActivity.kt you'll need to inflate a fragment specific menu and process menu click events

// You'll need to create an xml with a menu for your fragment// and then use it in inflate function belowoverridefunonCreateOptionsMenu(menu: Menu): Boolean {
    menuInflater.inflate(R.menu.my_fragment_menu_id, menu)
    returntrue
}


overridefunonOptionsItemSelected(item: MenuItem): Boolean {
    // Handle item selectionwhen (item.getItemId()) {
        R.id.menu_item1_id -> {
            doMenuItem1()
            returntrue
        }
        R.id.menu_item2_id -> {
            doMenuItem2()
            returntrue
        }
        else -> returnsuper.onOptionsItemSelected(item)
    }
}

Finally, your fragment_owner_layout.xml is just FrameLayout element that controls other frames

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