问题描述

I am trying to implement an action bar in which one of the buttons on click shows a popup menu. Here's the menu. XML (menu items in the action bar)

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/search"
    android:icon="@drawable/ic_action_search"
    android:orderInCategory="0"
    android:showAsAction="always"
    android:title="@string/menu_search"/>
<item
    android:id="@+id/refresh"
    android:icon="@drawable/ic_action_refresh"
    android:orderInCategory="1"
    android:showAsAction="always"
    android:title="@string/menu_refresh"/>


 <Item
    android:id="@+id/popup"
    android:icon="@drawable/ic_action_search"
    android:onClick="showPopup"
    android:orderInCategory="1"
    android:showAsAction="always"
    android:title="@string/menu_search" />

I wish to show a popup menu on the click of the item having id "@+id/popup".

here is the XML for the popup menu

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/item1"
    android:icon="@drawable/ic_action_search"
    android:orderInCategory="0"
    android:showAsAction="always"
    android:title="@string/menu_search"/>
<item
    android:id="@+id/item2"
    android:icon="@drawable/ic_action_search"
    android:orderInCategory="1"
    android:showAsAction="always"
    android:title="@string/menu_search"/>

here is the onClick method for the button

public void showPopup(View v) {
    PopupMenu popup = new PopupMenu(this, v);
    MenuInflater inflater = popup.getMenuInflater();
    inflater.inflate(R.menu.overflow, popup.getMenu());
    popup.show();
}

And the problem is that no popup shows up on click of that button. Need help folks.

I found a solution to this. Instead to using the menu XML to inflate the popup menu, I made a XML layout file.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#8b8989"
android:orientation="vertical"
android:padding="10dip" >

<TextView
    android:id="@+id/menuItem1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dip"
    android:text="@string/menu1" />

<TextView
    android:id="@+id/menuItem2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dip"
    android:text="@string/menu2" />
<TextView
    android:id="@+id/menuItem3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dip"
    android:text="@string/menu3" />
</LinearLayout> 

and i changed the onClick method

public void showPopup(View v) {
    LayoutInflater inflater = (LayoutInflater) MainActivity.this
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        PopupWindow pw = new PopupWindow(inflater.inflate(
                R.layout.overflow_layout, null, false), 300, 400, true);
        pw.showAtLocation(findViewById(R.id.container), Gravity.CENTER, 0,
                0);
}

This solved the issue

这篇关于单击操作栏中的按钮时弹出菜单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！