android - can we call startActivityForResult from adapter?How to get the response?

Question

is it possible to have method startActivtyForResult within an adapter?Then how to get the response? Where to execute the call back function?

Answer 1

Yes, it's possible. You need a reference for the Context in the adapter and call the activity:

Intent intent = new Intent(context, TargetActivity.class);
((Activity) context).startActivityForResult(intent, REQUEST_FOR_ACTIVITY_CODE);

Beware that context must be an activity context or this code will fail.

You get the result in the enclosing activity using onActivityResult as usual.

So, for example:

In your adapter:

MyAdapter(Context context) {
    mContext = context;
}

public View getView(int position, View convertView, ViewGroup parent) {
    …
    open.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            …
            Activity origin = (Activity)mContext;
            origin.startActivityForResult(new Intent(mContext, SecondActivity.class), requestCode);
        }   
    });
    …
}

public  void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d("MyAdapter", "onActivityResult");
}

In your second activity, do as usual with setResult and finish.

In your main activity, capture the result and pass to the adapter callback:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    mAdapter.onActivityResult(requestCode, resultCode, data);
}