OnActivityResult 未在 Fragment 中调用，其中意图从适配器类传递 [英] OnActivityResult not getting called in Fragment where intent pass from adapter class

问题描述

所以在我的适配器类中，我想允许用户捕获图像

So in my adapter class, I would like to allow user to capture image

 fun dispatchTakePictureIntent() {
        try {
            val captureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            (context as Activity).startActivityForResult(captureIntent, 1)
        } catch (e: ActivityNotFoundException) {
            e.printStackTrace()
        }
    }

    fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
        Log.d("MyAdapter", "onActivityResult")
    }

我希望片段类中的 onActivityResult 被调用，但它没有.

I want the onActivityResult in a fragment class get called, but it doesn't.

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
        val imageListAdapter : ImageListAdapter?=null
        imageListAdapter?.onActivityResult(requestCode, resultCode,data)
                if (requestCode == 1 && resultCode == Activity.RESULT_OK) 
                {
                    longToast("called")
                }else{
                    longToast("no")
                }
            }

没有显示吐司.如何解决?

There are no toast displayed. How to solve ?

我意识到 onActivityResult 如果我放入我的一个 Activity 类就可以工作，但我想放入 Fragment 类！

I realize the onActivityResult works if I put in one of my Activity class, but I want to put at Fragment class !

推荐答案

正如 nikita 所说，如果你想在片段中获得结果，你应该从片段中调用 startActivityForResult.

as nikita said you should call startActivityForResult from fragment if you want to get results in fragment.

我想在适配器类中调用 startActivityForResult，所以我会需要上下文作为活动然后创建 OnItemClick 接口，使您的片段实现它并将其在构造函​​数中传递给您的适配器.然后当用户点击某个item时调用接口方法

I want to call startActivityForResult in adapter class, so I would need context as Activity Then create OnItemClick interface make your fragment implement it and pass it in a constructor to your Adapter. Then when a user clicks on an item call interface method

interface OnItemClickListener{
   onClick(item:T)
}

Foo: Fragment, OnItemClickListener{
...
    onClick(item:T){
        startActivityForResult...
    }
...
    initAdapter(){
        Adapter(listener=this,...)
    }

}

在你的适配器中

...
itemView.setOnClickListener{
    listener.onClick(item)
}

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