How to set an icon at the end of Toolbar

问题:

I want to set an icon at the the end of my Toolbar,which start another activity. My Toolbar portion

 <android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="@dimen/abc_action_bar_default_height_material"
                android:background="#2B4AE0"
                app:theme="@style/ToolBarStyle">

                <TextView
                    android:id="@+id/headerText"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="@android:style/TextAppearance.Theme"
                    android:textColor="@android:color/white" />

                <RelativeLayout
                    android:id="@+id/notification"
                    android:layout_width="50dp"
                    android:layout_height="match_parent"
                    android:clickable="true"
                    android:gravity="center" />

                    <ImageView
                        android:layout_width="25dp"
                        android:layout_height="25dp"

                        android:layout_centerHorizontal="true"
                        android:layout_centerVertical="true"
                        android:src="@drawable/bell_icon" />
                </RelativeLayout>
            </android.support.v7.widget.Toolbar>

I tried

android:layout_alignParentEnd="true"

and setting margin left but it doesn't work correctly.

回答1:

Try adding this to your ImageView:

android:layout_gravity="end"

回答2:

If you want something like this (icon 2)

You do not need add icon to the layout manually, you should to implement menu.xml

1. Create menu.xml like this

   <?xml version="1.0" encoding="utf-8"?>
   <menu xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:id="@+id/new_activity"
           android:icon="@drawable/ic_custom_icon"
           android:title="@string/new_activity" />
   </menu>
   

2. Add it in your activity/fragment to the actionbar/toolbar by

   @Override
   public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.menu, menu);
      return true;
   }
   

3. Handle menu items events

Toolbar with menus works fine, it sets icons to the right of toolbar automatically

回答3:

If there's anyone that still confused (including me before), somehow android studio doesn't provide autocomplete for the android:layout_gravity under the toolbar tag. So to make it works, just copy and paste android:layout_gravity="end" to the ImageView/layout.

回答4:

<item
    android:title="kjljk"
    app:showAsAction="always"
    android:id="@+id/menuitem_search"
    android:icon="@drawable/pdficon"
    >
</item>

Then in OnCreateView: setHasOptionsMenu(true); Closing the OncreateView below write this: @Override

public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.pdf, menu);
    ...
}