android - backspace is not working properly in android phone
问题描述
Here is the following code where backspace is not working as it should be. When all digits are filled and we tried to clear the last 6th digit is cleared but keypad hides. On re-tapping on 5th digit keypad appeared but cleared 2 digits (like 5th-4th and 3rd-2nd) on a single backspace tap/click. I have checked on the Internet as well and tried many solutions but I am not able to solve this issue.
class LicenseLoginFragment2 : Fragment() {
private lateinit var viewModel : DataViewModel
var enteredLicenseCode = ""
var expDate = ""
private var oldValues = mutableMapOf<String, String>()
private var responseSuccess = false
var myRunnable : Runnable? = null
var myHandler = Handler()
var reqBtnClicked = false
private var licenseVerified = false
private var invalidLicense = false
private var expLicense = false
private var deactivatedLicense = false
lateinit var mContext : Context
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
mContext = requireContext()
val binding : LicenseLoginBinding = DataBindingUtil.inflate(
inflater, R.layout.license_login, container, false)
viewModel = ViewModelProviders.of(requireActivity()).get(DataViewModel::class.java)
viewModel.branchNames.value = mutableListOf()
licenseBoxListeners(binding)
/*
binding.no1LicenseLogin.clearFocus()
binding.no2LicenseLogin.clearFocus()
binding.no3LicenseLogin.clearFocus()
binding.no4LicenseLogin.clearFocus()
binding.no5LicenseLogin.clearFocus()
binding.no6LicenseLogin.clearFocus()
*/
var netOprtns = NetworkOperations()
var isNetConnected = false
return binding.root
}
private fun licenseBoxListeners(binding: LicenseLoginBinding) {
/*
binding.no1LicenseLogin.isFocusableInTouchMode = true
binding.no2LicenseLogin.isFocusableInTouchMode = true
binding.no3LicenseLogin.isFocusableInTouchMode = true
binding.no4LicenseLogin.isFocusableInTouchMode = true
binding.no5LicenseLogin.isFocusableInTouchMode = true
binding.no6LicenseLogin.isFocusableInTouchMode = true
*/
licenseBox1(binding)
licenseBox2(binding)
licenseBox3(binding)
licenseBox4(binding)
licenseBox5(binding)
licenseBox6(binding)
}
private fun licenseBox1(binding : LicenseLoginBinding) {
binding.no1LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no1LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no1LicenseLogin.setSelectAllOnFocus(true);
binding.no1LicenseLogin.selectAll()
}
}
binding.no1LicenseLogin.setOnClickListener {
binding.no1LicenseLogin.isCursorVisible = true
binding.no1LicenseLogin.setSelectAllOnFocus(true);
binding.no1LicenseLogin.selectAll()
}
binding.no1LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
}
false
}
binding.no1LicenseLogin.setOnEditorActionListener { v, actionId, event ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
binding.no1LicenseLogin.isCursorVisible = false
binding.no1LicenseLogin.setSelectAllOnFocus(false)
// after click of tick marked (enter) btn on keyboard
// cursor goes to first box
binding.no1LicenseLogin.clearFocus();
binding.no2LicenseLogin.clearFocus();
binding.no3LicenseLogin.clearFocus();
binding.no4LicenseLogin.clearFocus();
binding.no5LicenseLogin.clearFocus();
binding.no6LicenseLogin.clearFocus();
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(binding.mainLicenseLayout.windowToken, 0);
true
}
false
}
binding.no1LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no1LicenseLogin.text.isNotEmpty()) {
binding.no2LicenseLogin.setSelection(0)
binding.no2LicenseLogin.requestFocus()
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
}
})
}
private fun licenseBox2(binding : LicenseLoginBinding) {
binding.no2LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no2LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no2LicenseLogin.setSelectAllOnFocus(true);
binding.no2LicenseLogin.selectAll()
}
}
binding.no2LicenseLogin.setOnClickListener {
binding.no2LicenseLogin.isCursorVisible = true
binding.no2LicenseLogin.setSelectAllOnFocus(true);
binding.no2LicenseLogin.selectAll()
}
binding.no2LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
binding.no1LicenseLogin.requestFocus()
binding.no2LicenseLogin.setText("")
}
false
}
binding.no2LicenseLogin.setOnEditorActionListener { v, actionId, event ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
//Toast.makeText(requireContext(), "Done button clicked", Toast.LENGTH_SHORT).show()
binding.no2LicenseLogin.isCursorVisible = false
binding.no5LicenseLogin.setSelectAllOnFocus(false)
// after click of tick marked (enter) btn on keyboard
// cursor goes to first box
binding.no1LicenseLogin.clearFocus();
binding.no2LicenseLogin.clearFocus();
binding.no3LicenseLogin.clearFocus();
binding.no4LicenseLogin.clearFocus();
binding.no5LicenseLogin.clearFocus();
binding.no6LicenseLogin.clearFocus();
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(binding.mainLicenseLayout.windowToken, 0);
true
}
false
}
binding.no2LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no2LicenseLogin.text.isNotEmpty()) {
binding.no3LicenseLogin.setSelection(0)
binding.no3LicenseLogin.requestFocus()
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
}
})
}
private fun licenseBox3(binding : LicenseLoginBinding) {
binding.no3LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no3LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no3LicenseLogin.setSelectAllOnFocus(true);
binding.no3LicenseLogin.selectAll()
}
}
binding.no3LicenseLogin.setOnClickListener {
binding.no3LicenseLogin.isCursorVisible = true
binding.no3LicenseLogin.setSelectAllOnFocus(true);
binding.no3LicenseLogin.selectAll()
}
binding.no3LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
binding.no2LicenseLogin.requestFocus()
binding.no3LicenseLogin.setText("")
}
false
}
binding.no3LicenseLogin.setOnEditorActionListener { v, actionId, event ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
binding.no3LicenseLogin.isCursorVisible = false
binding.no5LicenseLogin.setSelectAllOnFocus(false)
// after click of tick marked (enter) btn on keyboard
// cursor goes to first box
binding.no1LicenseLogin.clearFocus();
binding.no2LicenseLogin.clearFocus();
binding.no3LicenseLogin.clearFocus();
binding.no4LicenseLogin.clearFocus();
binding.no5LicenseLogin.clearFocus();
binding.no6LicenseLogin.clearFocus();
var view = requireActivity().currentFocus
if (view != null) {
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(view.windowToken, 0)
}
}
false
}
binding.no3LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no3LicenseLogin.text.isNotEmpty()) {
binding.no4LicenseLogin.setSelection(0)
binding.no4LicenseLogin.requestFocus()
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
}
})
}
private fun licenseBox4(binding : LicenseLoginBinding) {
binding.no4LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no4LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no4LicenseLogin.setSelectAllOnFocus(true);
binding.no4LicenseLogin.selectAll()
}
}
binding.no4LicenseLogin.setOnClickListener {
binding.no4LicenseLogin.isCursorVisible = true
binding.no4LicenseLogin.setSelectAllOnFocus(true);
binding.no4LicenseLogin.selectAll()
}
binding.no4LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
binding.no3LicenseLogin.requestFocus()
binding.no4LicenseLogin.setText("")
}
false
}
binding.no4LicenseLogin.setOnEditorActionListener { v, actionId, event ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
binding.no4LicenseLogin.isCursorVisible = false
binding.no4LicenseLogin.setSelectAllOnFocus(false)
// after click of tick marked (enter) btn on keyboard
// cursor goes to first box
binding.no1LicenseLogin.clearFocus();
binding.no2LicenseLogin.clearFocus();
binding.no3LicenseLogin.clearFocus();
binding.no4LicenseLogin.clearFocus();
binding.no5LicenseLogin.clearFocus();
binding.no6LicenseLogin.clearFocus();
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(binding.mainLicenseLayout.windowToken, 0);
true
}
false
}
binding.no4LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no4LicenseLogin.text.isNotEmpty()) {
binding.no4LicenseLogin.setSelection(0)
binding.no5LicenseLogin.requestFocus()
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
}
})
}
private fun licenseBox5(binding : LicenseLoginBinding) {
binding.no5LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no5LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no5LicenseLogin.setSelectAllOnFocus(true);
binding.no5LicenseLogin.selectAll()
}
}
binding.no5LicenseLogin.setOnClickListener {
binding.no5LicenseLogin.isCursorVisible = true
binding.no5LicenseLogin.setSelectAllOnFocus(true);
binding.no5LicenseLogin.selectAll()
}
binding.no5LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
binding.no4LicenseLogin.requestFocus()
binding.no5LicenseLogin.setText("")
}
false
}
binding.no5LicenseLogin.setOnEditorActionListener { v, actionId, event ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
//Toast.makeText(requireContext(), "Done button clicked", Toast.LENGTH_SHORT).show()
binding.no5LicenseLogin.isCursorVisible = false
binding.no5LicenseLogin.setSelectAllOnFocus(false)
// after click of tick marked (enter) btn on keyboard
// cursor goes to first box
binding.no1LicenseLogin.clearFocus();
binding.no2LicenseLogin.clearFocus();
binding.no3LicenseLogin.clearFocus();
binding.no4LicenseLogin.clearFocus();
binding.no5LicenseLogin.clearFocus();
binding.no6LicenseLogin.clearFocus();
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(binding.mainLicenseLayout.windowToken, 0);
true
}
false
}
binding.no5LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no5LicenseLogin.text.isNotEmpty()) {
binding.no6LicenseLogin.setSelection(0)
binding.no6LicenseLogin.requestFocus()
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
}
})
}
private fun licenseBox6(binding : LicenseLoginBinding) {
binding.no6LicenseLogin.onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
//binding.no6LicenseLogin.isCursorVisible = true
if (hasFocus) { //Do your work
binding.no6LicenseLogin.setSelectAllOnFocus(true);
binding.no6LicenseLogin.selectAll()
}
}
binding.no6LicenseLogin.setOnClickListener {
binding.no6LicenseLogin.isCursorVisible = true
binding.no6LicenseLogin.setSelectAllOnFocus(true);
binding.no6LicenseLogin.selectAll()
}
binding.no6LicenseLogin.setOnKeyListener { v, keyCode, event ->
//You can identify which key pressed buy checking keyCode value with KeyEvent.KEYCODE_
if (keyCode == KeyEvent.KEYCODE_DEL) { //this is for backspace
binding.no5LicenseLogin.requestFocus()
binding.no6LicenseLogin.setText("")
}
false
}
/*
binding.no6LicenseLogin.setOnKeyListener { v, keyCode, event ->
if (keyCode == KeyEvent.KEYCODE_BACK) {
// User has pressed Back key. So hide the keyboard
//Log.d("return key pressed 1", "OKKK")
binding.no6LicenseLogin.clearFocus();
}
false
}
*/
binding.no6LicenseLogin.setOnKeyListener(object : View.OnKeyListener {
override fun onKey(v: View?, keyCode: Int, event: KeyEvent): Boolean {
//Log.d("ok", "sir")
binding.no6LicenseLogin.isCursorVisible = false
if ((event.action == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
return true
}
//Log.d("ok", "sir")
return false
}
})
binding.no6LicenseLogin.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
if (binding.no6LicenseLogin.text.isNotEmpty()) {
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
checkLicenseBoxesFilled(binding)
binding.no6LicenseLogin.clearFocus()
binding.no1LicenseLogin.setSelectAllOnFocus(false)
var imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(binding.mainLicenseLayout.windowToken, 0);
}
})
}
private fun checkLicenseBoxesFilled(binding: LicenseLoginBinding) {
enteredLicenseCode = binding.no1LicenseLogin.text.toString() + binding.no2LicenseLogin.text.toString() +
binding.no3LicenseLogin.text.toString() + binding.no4LicenseLogin.text.toString() +
binding.no5LicenseLogin.text.toString() + binding.no6LicenseLogin.text.toString()
if (enteredLicenseCode.length == 6) {
binding.next.isEnabled = true
binding.next.background = resources.getDrawable(R.drawable.button_rounded_corners)
} else {
binding.next.isEnabled = false
binding.next.background = resources.getDrawable(R.drawable.button_disabled_rounded_corners)
}
}
}
The screen recording is as follows:
Please help me to solve this issue.
解决方案
好吧，您的部分问题是 KeyEventListener 会触发两次——一次是向下，一次是向上。您只需要删除向下的数据，而不是向上的数据。基本上忽略所有的ups。
您的下一个大问题是大多数键盘根本不发送键事件，它们发送提交文本事件和删除事件。所以很有可能它根本不会开火。按键事件通常用于物理按键——蓝牙键盘、带有滑出键盘的罕见手机以及音量等按钮。软键盘具有更好的界面，可以避免按键事件。
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