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

概述所以在我的适配器类中,我想允许用户捕获图像fundispatchTakePictureIntent(){try{valcaptureIntent=Intent(MediaStore.ACTION_IMAGE_CAPTURE);(contextasActivity).startActivityForResult(captureIntent,1)}catch(e:

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)}

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