Android : Error in getting id of any view created inside android.support.v7.widget.Toolbar

Question

I am not able to get Id of either Framelayout or Textview which are inside the toolbar. Please have a look :

<android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/colorAppBg"
            app:popupTheme="@style/AppTheme.PopupOverlay" >
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:src="@drawable/logo"/>

                <FrameLayout
                    android:id="@+id/fl_message_bg"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:visibility="gone"
                    android:layout_gravity="right|center">
                    <ImageView
                        android:id="@+id/iv_cart"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="bottom"
                        android:layout_marginRight="12dp"
                        android:layout_marginTop="2dp"
                        android:src="@drawable/envelope"/>
                    <TextView
                        android:id="@+id/tv_message_count"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="top|right"
                        android:text="10"
                        android:textColor="@color/colorWhite"
                        android:gravity="center"
                        android:textSize="12sp"
                        android:visibility="visible"
                        android:background="@drawable/circle_notification"/>
                </FrameLayout>            
            </FrameLayout>
        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>

This is my code of finding ID of those view either in fragment or Activity which extends AppCompatActivity. Inside Fragment :

`private Activity activity;
@Override
    public void onAttach(Context context) {
        super.onAttach(context);
        this.activity =(Activity)context;
    }
flMessageCountBg = (FrameLayout) activity.findViewById(R.id.fl_message_bg);` 

In Activity :

FrameLayout flMessageCountBg = (FrameLayout) findViewById(R.id.fl_message_bg);

I am getting null in both case.Please help me on this. Thanks in advance.

Answer 1

The solution was very simple of getting id (Inside Fragment) of view created within android.support.v7.widget.Toolbar. flMessageCountBg = (FrameLayout) getActivity().findViewById(R.id.fl_message_bg);

I have created three layout folder layout,layout-large-port and layout-xlarge-port and I miss to change the ID while I am testing for 7 inch Tablet which pick Id from layout-large-port.

@Malek,@Context and @bhargav

Thanks for your help.

Answer 2

You're using a support library so I you should set the toolbar as support action bar. Then you can get the views inside the toolbar by using toolbar.findviewbyid(id)

Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ImageView iv = (ImageView) toolbar.findViewById(R.id.iv_cart);

if you're using a fragment and your activity extends AppCompatActivity then you can set the support action bar as follows:

((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);

Answer 3

Get your toolbar from your activity in the fragment then you get your framelayout from your toolbar like this:

Toolbar toolbar = (Toolbar) getActivity().findViewById(R.id.toolbar);
FrameLayout flMessageCountBg = (FrameLayout) toolbar.findViewById(R.id.fl_message_bg);

Answer 4

Try this way

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
FrameLayout flMessageCountBg = (FrameLayout) toolbar.findViewById(R.id.fl_message_bg);