Android adapter's getView() not calling an activity

Question

I am trying to call an activity from adapter class. My activity class has no constructor but onCreate(). How do I call it from getView()? I searched for solutions but it's not working.

My adapter getView():

public View getView(int position, View convertView, ViewGroup parent) {
        //SharedPostView holder;
        PostActivity holder;



        if (convertView == null) {
            Log.d("network frag list"," convertView null ");
            LayoutInflater inflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.activity_post, null);
            holder = new PostActivity();
            convertView.setTag(holder);
        } else {
            Log.d("network frag list"," convertView.getTag() ");
            holder = (PostActivity)convertView.getTag();
        }
        holder.init(position);
        Log.d("network frag list", " getView");


        return convertView;
}

score 1 · Answer 1 · answered Oct 30 '15 at 06:05

1

If I understood you correctly, you are trying to launch another activity from your listview. For that you need an intent.

Intent intent = new Intent(this, MySecondActivity.class);
startActivity(intent);

answered Oct 30 '15 at 06:05

BigDru

162
10

score 0 · Accepted Answer · answered Oct 30 '15 at 06:08

Try this,

This is my getView from adapter class,

@Override
    public View getView(final int position, View convertView, ViewGroup arg2) {
        // TODO Auto-generated method stub
        View myView = convertView;
        final ViewHolder holder;
        try {

            if (myView == null) {
                LayoutInflater inflater = LayoutInflater.from(context);
                myView = inflater.inflate(R.layout.row_affiliates_list, null);
                holder = new ViewHolder();

                holder.txtAffiliateHeader = (TextView) myView.findViewById(R.id.txtAffiliateHeader);

                holder.rlMain = (RelativeLayout) myView.findViewById(R.id.rlMain);
                holder.viewLine = (TextView) myView.findViewById(R.id.viewLine);

                myView.setTag(holder);
            } else {
                holder = (ViewHolder) myView.getTag();
            }
            holder.txtAffiliateHeader.setText(""+ AffiliatesList.get(position).getStrAffiliateTitle());

            holder.rlMain.setTag(position);
            holder.rlMain.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    int arg2 = Integer.parseInt(v.getTag().toString());

                    Intent intent = new Intent(context, SecondActivity.class);
                    context.startActivity(intent);
                }
            });

            return myView;
        } catch (Exception e) {
            return myView;
        }
    }

This is how you can call the activity from adapter class on click of your button or full relative layout.

score 0 · Answer 3 · answered Oct 30 '15 at 06:34

You need to understand the accessibility of the method startActivity(). You can see the details of this method once you hit the ctrl+click in the Android Studio. Here is the detail , The class hierarchy up to Activity is as below-

Context (android.content)
   ContextWrapper (android.content)
     ContextThemeWrapper (android.view)
       Activity (android.app)

the Context class is having a abstract method.

 public abstract void startActivity(Intent intent);

This is overridden in the class ContextWrapper and the Activity. Hence you can call the method startActivity(Intent intent) from any of the derived classes or from reference of the derived classes.

So you have are having reference of the Context you can call the method as-

context.startActivity(intent)

Android adapter's getView() not calling an activity

3 Answers3