后退箭头不会触发 onOptionsItemSelected

Question

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，该功能未执行。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)
    }

Answer 1

尝试在onCreate中设置action bar。

setSupportActionBar( yourActionBar );