【Android】AlertDialog中的EditText不能弹出软键盘的问题

川长思鸟来 2022-07-11 07:54 488阅读 0赞

## **摘要** ##

AlertDialog中加入EditText但是不弹出软键盘等问题网上有很多不管用的解决方案，有的方案是**强制弹出软键盘**，然而即使弹出来，也是显示在AlertDialog的后面，被Dialog遮挡。

## **解决方案** ##

Dialog的官方文档：[http://developer.android.com/reference/android/app/Dialog.html][http_developer.android.com_reference_android_app_Dialog.html] ，其中有一段：

> **Note:** Activities provide a facility to manage the creation, saving and restoring of dialogs. See [onCreateDialog(int)][onCreateDialog_int], [onPrepareDialog(int, Dialog)][onPrepareDialog_int_ Dialog], [showDialog(int)][showDialog_int], and [dismissDialog(int)][dismissDialog_int]. If these methods are used, [getOwnerActivity()][getOwnerActivity] will return the Activity that managed this dialog.
> 
> Often you will want to have a Dialog display on top of the current input method, because there is no reason for it to accept text. You can do this by setting the [WindowManager.LayoutParams.FLAG\_ALT\_FOCUSABLE\_IM][WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM] window flag (assuming your Dialog takes input focus, as it the default) with the following code:
> 
>     getWindow().setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
>             WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

这段话的大概意思是说，WindowManager.LayoutParams.FLAG\_ALT\_FOCUSABLE\_IM 这个参数会让Dialog遮挡住软键盘，显示在软键盘的前面。

这是默认情况下隐藏软键盘的方法，要重新显示软键盘，要执行下面这段代码：

alertDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

我是把它写在了setOnFocusChangeListener里，起效了

editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View view, boolean focused) {
            if (focused) {
                 //dialog弹出软键盘
                 alertDialog.getWindow()
                       .clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);   
            }
        }
    });

AlertDialog.setView()则不会出现以上问题。

### **另外** ###

为了防止弹出输入法时把后面的背景挤变形，可以在Manifest里的相应Activity添加：

android:windowSoftInputMode="adjustPan|stateHidden"

像这样：

--------------------

## **【参考资料】** ##

1、[关于AlertDialog中EditText不能弹出输入法解决方法][AlertDialog_EditText]

[http_developer.android.com_reference_android_app_Dialog.html]: http://developer.android.com/reference/android/app/Dialog.html
[onCreateDialog_int]: https://developer.android.com/reference/android/app/Activity.html#onCreateDialog%28int%29
[onPrepareDialog_int_ Dialog]: https://developer.android.com/reference/android/app/Activity.html#onPrepareDialog%28int,%20android.app.Dialog%29
[showDialog_int]: https://developer.android.com/reference/android/app/Activity.html#showDialog%28int%29
[dismissDialog_int]: https://developer.android.com/reference/android/app/Activity.html#dismissDialog%28int%29
[getOwnerActivity]: https://developer.android.com/reference/android/app/Dialog.html#getOwnerActivity%28%29
[WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM]: https://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_ALT_FOCUSABLE_IM
[AlertDialog_EditText]: http://blog.csdn.net/wurensen/article/details/21018115