/**
 * 判断键盘是否显示
 *
 * @return true 显示
 */
public static boolean isSoftShowing(Activity activity) {
    //获取当前屏幕内容的高度
    int screenHeight = activity.getWindow().getDecorView().getHeight();
    //获取View可见区域的bottom
    Rect rect = new Rect();
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);

    return screenHeight - rect.bottom != 0;
}

/**
 * 隐藏键盘
 */
public static void hide(Activity activity) {
    if (isSoftShowing(activity)){
        InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    }
}