Android: Clicking the EditText on ListView FooterView makes the keyboard open and close, open and close

Question

The code is very simply. There is an EditText on headerView and an EditText on footerView, make the items' height + headerView's height + footerView's height = the screen's height, after you click the EditText on HeaderView, then click the EditText on FooterView, the bug will appear. Anyone can help me explain the problem, I will appreciate it very much, thank you.

class MainActivity : AppCompatActivity() {
    @SuppressLint("ClickableViewAccessibility")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val listView = findViewById<ListView>(R.id.listView)
        listView.adapter = ArrayAdapter(this,
                android.R.layout.simple_list_item_1,
                arrayListOf("1", "2", "3", "4", "5", "6","1", "2", "3", "4", "5", "6"))
        val headerView = LayoutInflater.from(this).inflate(R.layout.header, listView, false)
        val etHeader = headerView.findViewById<EditText>(R.id.etComment)
        listView.addHeaderView(headerView)

        val footerView = LayoutInflater.from(this).inflate(R.layout.footer, listView, false)
        val etFooter = footerView.findViewById<EditText>(R.id.etComment)
        listView.addFooterView(footerView)

        etHeader.setOnFocusChangeListener { v, hasFocus ->
            Log.e("", "etHeader->setOnFocusChangeListener: $hasFocus")
        }
        etFooter.setOnFocusChangeListener { v, hasFocus ->
           Log.e("", "etFooter->setOnFocusChangeListener: $hasFocus")
        }

    }
}

The whole code is here: https://github.com/tuchangwei/EditTextIssue.

Answer 1

This is a focus preemption problem. Add the following code.

 etFooter.setOnFocusChangeListener { v, hasFocus ->
        Log.e("", "etFooter->setOnFocusChangeListener: $hasFocus")
        if(hasFocus){
            etFooter.setFocusable(true)
            etFooter.setFocusableInTouchMode(true)
            etFooter.requestFocus()
            etFooter.findFocus()
            val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
            imm.showSoftInput(etFooter, InputMethodManager.SHOW_FORCED);
        }
    }