gridView.setMultiChoiceModeListener 在 android 应用程序中不起作用

Question

我的代码如下：

class MySitesActivity : AppCompatActivity() {
val REQUEST_CODE = 3
private val TAG = "MySitesActivity"
lateinit var gridView: GridView
lateinit var siteAdapter:BaseAdapter
lateinit var sites:ArrayList<Site>
lateinit var actionBarObject:ActionBar

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_my_sites)
setSupportActionBar(findViewById(R.id.my_toolbar))
sites = ArrayList(db.appDao().getAllSites()) //From Database
gridView = findViewById<View>(R.id.gridview) as GridView
siteAdapter = SitesAdapter(this@MySitesActivity, sites)
gridView.adapter = siteAdapter
gridView.choiceMode = GridView.CHOICE_MODE_MULTIPLE // CAN DO IN XML
actionBarObject = supportActionBar!!
actionBarObject.setDisplayHomeAsUpEnabled(true)

Log.d(TAG, "* Setting MultiChoiceModeListener *")
gridView.setMultiChoiceModeListener(object : AbsListView.MultiChoiceModeListener {
override fun onItemCheckedStateChanged(mode: ActionMode, position: Int,
id: Long, checked: Boolean) {
// Here you can do something when items are selected/de-selected,
// such as update the title in the CAB
}
override fun onActionItemClicked(mode: ActionMode, item: MenuItem): Boolean {
// Respond to clicks on the actions in the CAB
return false
}
override fun onCreateActionMode(mode: ActionMode, menu: Menu): Boolean {
// Inflate the menu for the CAB
Log.d(TAG,"Inflating menu")
mode.menuInflater.inflate(R.menu.delete_menu, menu)
return true
}
override fun onDestroyActionMode(mode: ActionMode) {
// Here you can make any necessary updates to the activity when
// the CAB is removed. By default, selected items are deselected/unchecked.
}
override fun onPrepareActionMode(mode: ActionMode, menu: Menu): Boolean {
// Here you can perform updates to the CAB due to
// an invalidate() request
return false
}
})
}

}

为简洁起见，我删除了 databse 函数。onCreate 操作模式永远不会被调用，日志语句永远不会吐出数据。

我的站点适配器类扩展了基本适配器，返回的视图很好，显示正常。我没有在我的站点适配器类中添加任何侦听器或类似的东西。只是长按时什么也没发生。任何想法，因为我可能做错了什么？谢谢

Answer 1

好的，所以我选择了错误的模式。

GridView.CHOICE_MODE_MULTIPLE而不是GridView.CHOICE_MODE_MULTIPLE_MODAL

此更改解决了初始问题并创建了一个新问题，我认为我应该将其发布在单独的线程上。