您可以简单地将此代码添加到要隐藏软键盘的位置“

                        // Check if no view has focus:
                            View view = getCurrentFocus();
                            if (view != null) {
                                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                                imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
                            }

这对我有用。

public static void hideKeyboard(Activity act, EditText et){
    Context c = act.getBaseContext();
    View v = et.findFocus();
    if(v == null)
        return;
    InputMethodManager inputManager = (InputMethodManager) c.getSystemService(Context.INPUT_METHOD_SERVICE);
    inputManager.hideSoftInputFromWindow(v.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}

通过将Generic方法添加到Utility或Helper类。通过调用自己，您可以隐藏和显示键盘

fun AppCompatActivity.hideKeyboard() {
            val view = this.currentFocus
            if (view != null) {
                val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
                imm.hideSoftInputFromWindow(view.windowToken, 0)
            }
           window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN)

        }


 fun AppCompatActivity.showKeyboard() {
            val view = this.currentFocus
            if (view != null) {
                val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
                imm.hideSoftInputFromWindow(view.windowToken, 0)
            }                     window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN)

        }

与Android 10（API 29）一起工作

val activityView = activity?.window?.decorView?.rootView
activityView?.let {
    val imm = activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager
    imm?.hideSoftInputFromWindow(it.windowToken, 0)
}

只需调用下面的方法，如果键盘显示，它将隐藏键盘。

public void hideKeyboard() {
    try {
        InputMethodManager inputmanager = (InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputmanager != null) {
            inputmanager.hideSoftInputFromWindow(this.getCurrentFocus().getWindowToken(), 0);
        }
    } catch (Exception var2) {
    }

}

在Kotlin试试这个

 private fun hideKeyboard(){
    val imm = activity!!.getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager
    imm.hideSoftInputFromWindow(activity!!.currentFocus!!.windowToken, 0)
}

在Java中尝试

 private void hideKeyboard(){
  InputMethodManager imm =(InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
  imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
}