android保存完了，自动关闭软键盘

背景：

项目中在登录界面里有

1、一个设置服务器地址的UI

2、一个修改密码的UI

但是设置了服务器成功后，软键盘也不会自动关闭，这样用户体验有些不够完美。

解决：

1、定位一个监控类

2、让监控类帮我们实时处理是否显示状态

3、根据状态，来处理软键盘让其显示或隐藏。

1、KeyBoardShowListener（来自：https://blog.csdn.net/qq_26446715/article/details/80674378）

public class KeyBoardShowListener {

    private Context ctx;

    public KeyBoardShowListener(Context ctx) {
        this.ctx = ctx;
    }
    OnKeyboardVisibilityListener keyboardListener;

    public OnKeyboardVisibilityListener getKeyboardListener() {
        return keyboardListener;
    }

    public interface OnKeyboardVisibilityListener {


        void onVisibilityChanged(boolean visible);
    }

    public void setKeyboardListener(final OnKeyboardVisibilityListener listener, Activity activity) {
        final View activityRootView = ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);

        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

            private boolean wasOpened;

            private final int DefaultKeyboardDP = 100;

            // From @nathanielwolf answer... Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
            private final int EstimatedKeyboardDP = DefaultKeyboardDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);

            private final Rect r = new Rect();

            @Override
            public void onGlobalLayout() {
                // Convert the dp to pixels.
                int estimatedKeyboardHeight = (int) TypedValue
                        .applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, activityRootView.getResources().getDisplayMetrics());

                // Conclude whether the keyboard is shown or not.
                activityRootView.getWindowVisibleDisplayFrame(r);
                int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
                boolean isShown = heightDiff >= estimatedKeyboardHeight;

                if (isShown == wasOpened) {
                    Log.e("Keyboard state", "Ignoring global layout change...");
                    return;
                }

                wasOpened = isShown;
                listener.onVisibilityChanged(isShown);
            }
        });
    }
}

2、全局监控（Fragment中调用）

private void moniteKeyboard(){
        new KeyBoardShowListener(getActivity()).setKeyboardListener(
                new KeyBoardShowListener.OnKeyboardVisibilityListener() {
                    @Override
                    public void onVisibilityChanged(boolean visible) {
                        if (visible) {
                            bKeyboardShow = true;
                        } else {
                            bKeyboardShow = false;
                        }
                    }
                }, getActivity());
    }

说明：bKeyboardShow 全局变量

3、处理状态

if(bKeyboardShow){
        hideKeyboard();
}
这样就可以了，在需要的地方加入

protected void hideKeyboard() {
        InputMethodManager imm = (InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    }

说明：上面方法，显示的会隐藏，隐藏的时候会显示。