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Kotlin Android搜索菜单项在活动开始时集中显示

kotlin search button android

GPH · 技术社区 · 7 年前

问题:当活动开始时,如何使搜索菜单项集中? 我希望活动以下面的第二张图片开始。

这里有我的代码:

覆盖fun oncreate(savedinstancestate:bundle?){ super.oncreate(保存的状态) setContentView(r.layout.activity搜索) 设置支持工具栏(qponsearch_工具栏) } 覆盖fun onCreateOptions菜单(菜单:菜单):布尔值{ //对要在操作栏中使用的菜单进行充气 menuiflatter.inflate(r.menu.search_menu,menu) val searchitem=menu.finditem(r.id.app_bar_search) 如果(搜索项!=空){ val searchview=searchitem.actionview作为searchview val searchhint=getstring(r.string.searchhint) searchview.setqueryhint(searchhint) searchView.setOnQueryTextListener(对象:searchView.onQueryTextListener{ 覆盖fun onquerytextsubmit(query:string?):布尔值{ 返回false } 覆盖fun onquerytextchange(newtext:string?):布尔值{ 如果(newtext!!.ToString().IsNotEmpty()){ StartRecyclerView(GenerateData(NewText))。公司列表。清除() } 否则{ StartRecyclerView(GenerateData(NewText))。公司列表。清除() } 返回false } }) } 返回super.onCreateOptions菜单 }


   以下是XML文件:

<?xml version=“1.0”encoding=“utf-8”?gt;
<线性布局
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=“匹配父级”
android:layout_height=“匹配父级”
android:background=“@mipmap/bg”
android:orientation=“垂直”
工具:context=“searchqponactivity”>

<android.support.v7.widget.toolbar
android:id=“@+id/qponsearch_工具栏”
android:layout_width=“匹配父级”
app:title=“”
android:layout_height=“56dp”
android:background=“@color/white50”
android:elevation=“4dp”
android:theme=“@style/themeoverlay.appcompat.actionbar”
app:popuptheme=“@style/themeoverlay.appcompat.light”
/gt;

<android.support.v7.widget.recyclerview
android:id=“@+id/qponsearch_recyclerview”
android:layout_width=“匹配父级”
android:layout_height=“wrap_content”>
</android.support.v7.widget.recyclerview>










override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_search_qpon)
    setSupportActionBar(qponSearch_toolbar)
}

override fun onCreateOptionsMenu(menu: Menu): Boolean {
    // Inflate the menu to use in the action bar
    menuInflater.inflate(R.menu.search_menu, menu)

    val searchItem = menu.findItem(R.id.app_bar_search)

    if (searchItem!=null) {
        val searchView = searchItem.actionView as SearchView

        val searchHint = getString(R.string.searchHint)
        searchView.setQueryHint(searchHint)

        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
            override fun onQueryTextSubmit(query: String?): Boolean {
                return false
            }

            override fun onQueryTextChange(newText: String?): Boolean {
                if (newText!!.toString().isNotEmpty()) {

                    startRecyclerView(generateData(newText))
                    companyList.clear()
                }
                else {
                    startRecyclerView(generateData(newText))
                    companyList.clear()
                }
                return false
            }
        })
    }

    return super.onCreateOptionsMenu(menu)
}




<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:background="@mipmap/bg"
    android:orientation="vertical"
    tools:context=".SearchQponActivity">

    <android.support.v7.widget.Toolbar
        android:id="@+id/qponSearch_toolbar"
        android:layout_width="match_parent"
        app:title=""
        android:layout_height="56dp"
        android:background="@color/white50"
        android:elevation="4dp"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        />

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

</LinearLayout>




<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    >


    <item
        android:id="@+id/app_bar_search"
        android:icon="@android:drawable/ic_menu_search"
        android:title="Search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="always" />


</menu>

1 回复 | 直到 7 年前

Avijit Karmakar 7 年前

expandActionView() searchItem onCreateOptionsMenu()

override fun onCreateOptionsMenu(menu: Menu?): Boolean {
    menuInflater.inflate(R.menu.test_menu, menu)
    val searchItem = menu?.findItem(R.id.app_bar_search)
    searchItem?.expandActionView() // This line will expand the search view.
    ....
}

always ifRoom|collapseActionView

<item
    android:id="@+id/app_bar_search"
    android:icon="@android:drawable/ic_menu_search"
    android:title="Search"
    app:actionViewClass="android.support.v7.widget.SearchView"
    app:showAsAction="ifRoom|collapseActionView" />