Check which ImageView was clicked inside ListView-CodePudding

I have a ListView which works with Custom-Item-Templates.

Inside the List-Item Template are ImageViews (used as Buttons) and several Strings. The Data is bound with CustomAdapter.

I want to to do specific things inside the ListView with each Item on clicking different ImageViews.

I come from .NET and WebDevelopment and very new in Android.

How can I achieve to check which Button or Image in which ListItem was clicked.

Normally i would give each element in ListItem custom attribute whith unique_id including a key from the DataItem and get that Key in a Click-Event of Buttom and so on.

Is there any opinion to give a ImageView a Custom Attribute like 'MyCustomID' and get that in the Click-Event from it? Or how is the usual workflow for a situation like this: ListItems with repeating Elements and checking what ListItem belongs to the clicked Element inside.

Please help!

CodePudding user response：

Try with this

listView.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
   //  position is the index of clicked item.
   
}

});

CodePudding user response：

First of all, I'd recommend to change to RecyclerView. It is more performant, flexible and easier to use. Here you can check how to do it.

About your question: I don't remember exactly how to implement ListView, but I believe that you have an adapter. In that adapter, you are creating the view of your items. So, what you can do is create a listener interface that receives the info of your items. Something like:

interface OnImageItemClickListener {
    fun onImageClicked(imageInfo: ImageInfo)
}

data class ImageInfo(
    val id: Long,
    val uri: URI,
)

Then you can pass an implementation of that interface to your adapter, and then use it in the View.setOnClickListener method:

class CustomAdapter(
    private val listener: OnImageItemClickListener,
    private val info: List<ImageInfo>,
) : ... {
    override getView(position: Int, convertView: View, parent: ViewGroup): View {
        // Inflate your view...
        view.setOnClickListener {
            listener.onImageClicked(info[position])
        }
    }
}

Again, I highly recommend to migrate to RecyclerView. If you implement it, you'll have to follow the same steps.