hide keyboard android

                                    //With AndroidX:
fun View.hideKeyboard() = ViewCompat.getWindowInsetsController(this)
    ?.hide(WindowInsetsCompat.Type.ime())

                                    
class CloseHideSoftKeyboard : AppCompatActivity() {
  
 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_message)

        val editTextXml = findViewById<EditText>(R.id.editText)
        val btnSendMessage = findViewById<Button>(R.id.btnSend)
        
        btnSendMessage.setOnClickListener{
          // ... you actions
          // Important! EditText must have be focused 
          // do action close keyboard first before go to another
          // activity or fragment
        	closeSoftKeyboard(this, editTextXml)
        }
    }



   /* hide soft keyboard after writing and sending message or any */
   private fun closeSoftKeyboard(context: Context, v: View) {
        val iMm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
        iMm.hideSoftInputFromWindow(v.windowToken, 0)
        v.clearFocus()
    }
}
// link to resourse (Russian version)
// https://issue.life/questions/1109022/close-hide-the-android-soft-keyboard

                                    <activity android:name="com.your.package.ActivityName"
          android:windowSoftInputMode="stateHidden"  />

                                        private void closeSoftKeyboard() 
    { 
    	//If using a fragment use getActivity().getCurrentFocus()
        View v = this.getCurrentFocus(); 
  
  		// If Soft Keyboard is visible, it will be hide
        if (v != null) { 
          //If using a fragment use getActivity().getSystemService(...)
            InputMethodManager inputManager 
                = (InputMethodManager) 
                    getSystemService(Context.INPUT_METHOD_SERVICE); 
            inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0); 
        } 
    } 

                                    InputMethodManager inputManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); 
inputManager.hideSoftInputFromWindow(this.getCurrentFocus().getWindowToken(),InputMethodManager.HIDE_NOT_ALWAYS);