在按钮上关闭键盘单击该关闭片段

Question

如何在按钮单击时关闭键盘？我有一个片段,它有一个EditText和两个按钮.一个提交EditText内容,另一个只是关闭片段.现在当片段消失时,键盘会停留.但是,按后退按钮会关闭键盘或单击"完成"也会关闭它.但我需要的是当片段关闭时键盘消失.

我在这里,这里或这里尝试过类似问题的解决方案,但似乎都没有效果.大多数人扔了一个NullPointerException.一切都是为了活动而不是碎片.调用键盘的代码有效:

editText.requestFocus();
InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);

但是我必须添加getActivity()才能使它工作.

任何帮助将不胜感激.

Answer 1

使用此方法

public void hideKeyboard() {
    // Check if no view has focus:
    View view = getActivity().getCurrentFocus();
    if (view != null) {
        InputMethodManager inputManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
        inputManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
    }
}

Answer 2

对于片段使用以下函数

  public static void hideKeyboard(Activity activity) {
    InputMethodManager imm = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
    //Find the currently focused view, so we can grab the correct window token from it.
    View view = activity.getCurrentFocus();
    //If no view currently has focus, create a new one, just so we can grab a window token from it
    if (view == null) {
        view = new View(activity);
    }
    imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}

单击按钮时调用它

  btn_cancel.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            hideKeyboard(getActivity());
        }
    });