按下Back键后如何保持AutoCompleteTextView的DropDownList打开？ [英] How to keep DropDownList of AutoCompleteTextView opened after pressing the Back key?

问题描述

我在我的活动中使用AutoCompleteTextView，我需要它的DropDownList才能显示所有的时间（它是唯一的窗口中的View），即使在Back按键之后。我需要关闭软键盘。

我试图覆盖Activity的onBackPressed方法，但是根本没有使用，所以BackPressed事件正在处理更高的地方。所以我试图找出哪里，但AutoCompleteTextView没有定义的onBackPressed方法。

任何建议？

解决方案

您可以创建自定义AutoCompleteTextView并覆盖方法onKeyPreIme（int keyCode，KeyEvent事件）

我也意识到这种方法被称为2次，我只在第二次运行我的代码。这是一个例子：

  @Override 
 public boolean onKeyPreIme（int keyCode，KeyEvent event）{
 if（keyCode == KeyEvent.KEYCODE_BACK&& event.getAction（）== 1）{
 //在这里添加你的代码
 return true; 
} 
 return super.onKeyPreIme（keyCode，event）; 
} 
  

i am using AutoCompleteTextView in my Activity and i need it's DropDownList to be shown all the time (it's the only View in Window), even after Back key press. I need to dismiss soft keyboard instead.

I tried to override Activity's onBackPressed method, but it's not used at all, so BackPressed event is being handled somewhere "higher". So i tried to find out where, but AutoCompleteTextView has no onBackPressed method defined.

Any advices?

解决方案

You can create your custom AutoCompleteTextView and Override the method onKeyPreIme(int keyCode, KeyEvent event)

I also realized that this method is called 2 times, I'm running my code only in the second time. Here is the example:

@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == 1) {
        //add your code here
        return true;
    }
    return super.onKeyPreIme(keyCode, event);
}

这篇关于按下Back键后如何保持AutoCompleteTextView的DropDownList打开？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！