简单的方法是在EditText视图中设置以下属性。

android:imeOptions="actionDone" 

如果您需要在片段中隐藏键盘，则此方法有效。

public static void hideSoftKeyboard(Context context, View view) {
    if (context != null && view != null) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
    }
}

对于视图，只需传入

getView() method

首先，您应该从XML文件中添加addandroid:imeOptions字段，并将其值更改为actionUnspecified|actionGo，如下所示

 <android.support.design.widget.TextInputEditText
                    android:id="@+id/edit_text_id"
                    android:layout_width="fill_parent"
                    android:layout_height="@dimen/edit_text_height"
                    android:imeOptions="actionUnspecified|actionGo"
                    />

然后在java类中添加setOnEditorActionListener并添加InputMethodManager，如下所示

enterOrderNumber.setOnEditorActionListener（新的TextView.OnEditorActionlister（）{

    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (actionId == EditorInfo.IME_ACTION_GO) {
            InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Activity.INPUT_METHOD_SERVICE);
            imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
            return true;
        }
        return false;
    }
});

我的解决方案：

用活动构造它（视图是可选的），使用处理程序发布它（有一些延迟，例如100ms更好）。直接调用输入管理器有时不起作用。只有在工作时才能获得“活动”。我认为这很正常。

如果您可以在通话时获取根视图组或编辑视图，只需发送它即可获得更好的结果。

public class CloseSoftKeyboardRunnable implements Runnable
{
    Activity activity;
    View view;  // for dialog will occur context getcurrentfocus == null. send a rootview to find currentfocus.

    public CloseSoftKeyboardRunnable(Activity activity, View view)
    {
        this.activity = activity;
        this.view = view;
    }

    public CloseSoftKeyboardRunnable(Activity activity)
    {
        this.activity = activity;
    }
    @Override
    public void run() {
        if (!activity.isFinishing())
        {
            InputMethodManager imm = (InputMethodManager)activity.getSystemService(Context.INPUT_METHOD_SERVICE);

            if (view == null) {
                view = activity.getCurrentFocus();
            }
            else
            {
                try {
                    view = ((ViewGroup)view).getFocusedChild();
                }
                catch ( Exception e) {}
            }

            Window window =  activity.getWindow();
            
            if (window != null)
            {
                if (view == null) {
                    try {
                        view = window.getDecorView();
                        view = ((ViewGroup)view).getFocusedChild();
                    }
                    catch ( Exception e) {}
                }

                if (view == null) {
                    view = window.getDecorView();
                }

                if (view != null) {
                    if (view instanceof EditText)
                    {
                        EditText edittext = ((EditText) view);
                        edittext.setText(edittext.getText().toString()); // reset edit text bug on some keyboards bug
                        edittext.clearFocus();
                    }

                    imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
                }
                window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
            }
        }
    }
}

您也可以使用此代码段在Kotlin中隐藏键盘。

 fun hideKeyboard(activity: Activity?) {
    val inputManager: InputMethodManager? = 
    activity?.getSystemService(Context.INPUT_METHOD_SERVICE) as? 
    InputMethodManager
    // check if no view has focus:
    val v = activity?.currentFocus ?: return
    inputManager?.hideSoftInputFromWindow(v.windowToken, 0)
 }

对于科特林爱好者。我创建了两个扩展函数。为了隐藏键盘的乐趣，您可以将edittext的实例作为视图传递。

fun Context.hideKeyboard(view: View) {
    (getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager)?.apply {
        hideSoftInputFromWindow(view.windowToken, 0)
    }
}

fun Context.showKeyboard() {
    (getSystemService(Context.INPUT_METHOD_SERVICE) as? InputMethodManager)?.apply {
        toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY)
    }
}