android – OnActivityResult未在Fragment中调用,其中intent从适配器类传递

所以在我的适配器类中,我想允许用户捕获图像

 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")
    }

我希望调用片段类中的onActivityResult,但事实并非如此.

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.怎么解决 ？

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

解决方法:

正如nikita所说,如果你想在片段中得到结果,你应该从片段调用startActivityForResult.

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,...)
    }

}

并在你的适配器

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

标签：onactivityresult,android,kotlin,android-intent
来源： https://codeday.me/bug/20190930/1834329.html