后退箭头不会触发 onOptionsItemSelected

如何解决后退箭头不会触发 onOptionsItemSelected

我想在我的片段关闭之前添加确认对话框。我在片段中添加了 onoptionsItemSelected 函数。但是，当我单击后退箭头按钮时，不会执行该功能。这是我的代码

    override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
        super.onViewCreated(view,savedInstanceState)
        (activity as AppCompatActivity).supportActionBar?.show()
        (activity as AppCompatActivity).supportActionBar?.setdisplayHomeAsUpEnabled(true)
        (activity as AppCompatActivity).supportActionBar?.setdisplayShowHomeEnabled(true)
        setHasOptionsMenu(true)
    }


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

    override fun onoptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            android.R.id.home -> "testing".debugTag("Debug")
        }
        return super.onoptionsItemSelected(item)
    }

解决方法

尝试在 onCreate 中设置操作栏。

setSupportActionBar( yourActionBar );