如何处理单击工具栏中 SearchView 中的后退箭头

Question

如何处理在 androidx.appcompat.widget.SearchView 中单击后退箭头？

我找到了这个答案：How to handle back arrow event in a SearchView 但它对我不起作用。我从片段设置菜单。

在 MainActivity 中我有这个功能：

override fun onOptionsItemSelected(item: MenuItem): Boolean
{
    Log.d("MyTag", "Activity")
    return super.onOptionsItemSelected(item)
}

override fun onSupportNavigateUp(): Boolean
{
    Log.d("MyTag", "Up")
    return navController.navigateUp()
}

在片段中：

searchView.setOnQueryTextListener(
    object : SearchView.OnQueryTextListener
    {
        override fun onQueryTextSubmit(p0: String?): Boolean
        {
            Log.d("MyTag", "onQueryTextSubmit")
            hideKeyboard()
            return true
        }
        override fun onQueryTextChange(p0: String?): Boolean
        {
            return true
        }
    }
)

override fun onOptionsItemSelected(item: MenuItem): Boolean
{
    Log.d("MyTag", "Fragment")
    return super.onOptionsItemSelected(item)
}

None 这些函数在我单击后退箭头时被调用。 Logcat 看起来像这样：

// clicking search button
Activity  
Fragment

// clicking Enter on keyboard
onQueryTextSubmit

// clicking back arrow (Nothing)

// When I go to the next fragment and navigate back
Activity
Up

为什么我在SearchView中点击后退箭头没有调用任何事件？我怎样才能做到这一点？

感谢 Rustam Samandarov 这里是 onCreateOptionsMenu 的完整代码：

override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater)
{
    super.onCreateOptionsMenu(menu, inflater)
    inflater.inflate(R.menu.menu_toolbar_home, menu)

    val menuItem = menu.findItem(R.id.itemSearch)
    val searchView = menuItem.actionView as SearchView

    searchView.setOnQueryTextListener(
        object : SearchView.OnQueryTextListener
        {
            override fun onQueryTextSubmit(p0: String?): Boolean
            {
                Log.d("MyTag", "onQueryTextSubmit") // called when enter is pressed
                hideKeyboard()
                return true
            }
            override fun onQueryTextChange(p0: String?): Boolean
            {
                return true // called every time when text is changed
            }
        }
    )

    menuItem.setOnActionExpandListener(
        object : MenuItem.OnActionExpandListener
        {
            override fun onMenuItemActionExpand(p0: MenuItem?): Boolean
            {
                Log.d("MyTag", "onMenuItemActionExpand") // called when user opens SearchView
                return true;
            }
            override fun onMenuItemActionCollapse(p0: MenuItem?): Boolean
            {
                Log.d("MyTag", "onMenuItemActionCollapse") // called when user click back arrow or navigation back button
                return true
            }
        }
    )
}

Answer 1

您好，您应该将扩展侦听器设置为搜索视图

searchMenu.setOnActionExpandListener(
    object : MenuItem.OnActionExpandListener {
        override fun onMenuItemActionCollapse(item: MenuItem): Boolean {
            // Called when SearchView is collapsing
            // Custom code to run on back pressed
            return true
        }

        override fun onMenuItemActionExpand(item: MenuItem): Boolean {
            // Called when SearchView is expanding
            // Custom code to run on search view activated
            return true
        }
    })

如何处理单击工具栏中 SearchView 中的后退箭头

How to handle clicking back arrow in SearchView in Toolbar

android

kotlin

android-toolbar

searchview