there are two ways to do so...

method 1:in manifest file

define the line **android:windowSoftInputMode="adjustPan|stateAlwaysHidden"** of code in your manifest.xml file as below...

<activity
            android:name="packagename.youactivityname"
            android:screenOrientation="portrait"
            android:windowSoftInputMode="adjustPan|stateAlwaysHidden" />

Method 2 : in Activity or Java class

 if(getCurrentFocus()!=null) {
            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE)`enter code here`;
            inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
        }

它会work....@ASK

通过创建一个扩展来隐藏Kotlin中的软键盘，您可以全局使用该扩展。为此，需要创建一个Singleton类。

object Extensions {
    
      fun View.hideKeyboard() {
            val inputMethodManager =                                                 
            context.getSystemService(AppCompatActivity.INPUT_METHOD_SERVICE)           
            as InputMethodManager
            inputMethodManager.hideSoftInputFromWindow(windowToken, 0)
        }
    }

在需要隐藏键盘的片段类的活动中，可以使用mainlayout id调用此函数，如下所示

//constraintEditLayout is my main view layout, if you are using other layout like relative or linear layouts you can call with that layout id
constraintEditLayout.hideKeyboard()

对于开放式键盘：

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(edtView, InputMethodManager.SHOW_IMPLICIT);

对于关闭/隐藏键盘：

 InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
 imm.hideSoftInputFromWindow(edtView.getWindowToken(), 0);

我几乎尝试了所有这些答案，我遇到了一些随机问题，特别是三星galaxy s5。

我最终的结果是强迫表演和隐藏，而且效果很好：

/**
 * Force show softKeyboard.
 */
public static void forceShow(@NonNull Context context) {
    InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
}

/**
 * Force hide softKeyboard.
 */
public static void forceHide(@NonNull Activity activity, @NonNull EditText editText) {
    if (activity.getCurrentFocus() == null || !(activity.getCurrentFocus() instanceof EditText)) {
        editText.requestFocus();
    }
    InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
    activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
}

在AndroidManifest.xml中的<activity..>set android:windowSoftInputMode=“stateAlwaysHidden”

下面是隐藏和显示方法。

科特林

fun hideKeyboard(activity: Activity) {
    val v = activity.currentFocus
    val imm = activity.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
    assert(v != null)
    imm.hideSoftInputFromWindow(v!!.windowToken, InputMethodManager.HIDE_NOT_ALWAYS)
}

private fun showKeyboard(activity: Activity) {
    val v = activity.currentFocus
    val imm = activity.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
    assert(v != null)
    imm.showSoftInput(v, InputMethodManager.SHOW_IMPLICIT)
}

Java

public static void hideKeyboard(Activity activity) {
    View v = activity.getCurrentFocus();
    InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
    assert imm != null && v != null;
    imm.hideSoftInputFromWindow(v.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}

private static void showKeyboard(Activity activity) {
    View v = activity.getCurrentFocus();
    InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
    assert imm != null && v != null;
    imm.showSoftInput(v, InputMethodManager.SHOW_IMPLICIT);
}