Using listview in android

Question

I am making an android application that needs to use a ListView. I want to add a menubutton that says \"Add to list\" and once the user presses that menubutton,

Answer 1

    //Adapter    
    package com.example.androidlistview;

        import java.util.ArrayList;

        import android.app.Activity;
        import android.content.Context;
        import android.os.AsyncTask;
        import android.util.Log;
        import android.view.LayoutInflater;
        import android.view.View;
        import android.view.ViewGroup;
        import android.widget.BaseAdapter;
        import android.widget.ImageView;
        import android.widget.ProgressBar;
        import android.widget.TextView;

        import com.squareup.picasso.Picasso;

        public class CustomAdapter extends BaseAdapter{
            ProgressBar pro;
            private Activity activity;
            private ArrayList Arr_List;

            private LayoutInflater inflate;

            public  CustomAdapter(Activity a,ArrayList arr)
            {
                activity = a;
                Arr_List = arr;
                inflate = (LayoutInflater)a.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            }

            @Override
            public int getCount() {
                // TODO Auto-generated method stub

                return Arr_List.size();
            }

            @Override
            public Object getItem(int position) {
                // TODO Auto-generated method stub
                return Arr_List.get(position);
            }

            @Override
            public long getItemId(int position) {
                // TODO Auto-generated method stub
                return 0;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                // TODO Auto-generated method stub
                ViewHolder holder = null;
                String url = null;
                Log.i("getView","called");

                if(convertView==null){
                    holder = new ViewHolder();

                     url ="ImagePath";

                    convertView = inflate.inflate(R.layout.tbrow, null);
                    holder.txtname = (TextView)convertView.findViewById(R.id.txt_name);
                    holder.txtdist = (TextView)convertView.findViewById(R.id.txt_dist);
                    holder.txtaddress = (TextView)convertView.findViewById(R.id.iRestaddress);
                    holder.image = (ImageView)convertView.findViewById(R.id.img_listimage);
                    holder.txtname.setText(Arr_List.get(position).getName());
                    holder.txtdist.setText(Arr_List.get(position).getD_dist());
                    holder.txtaddress.setText(Arr_List.get(position).getvAddress2());
                    Log.i("URLLRLRLRRL",""+url);
                    Picasso.with(activity).load(url).placeholder(R.drawable.listimg).noFade().into(holder.image);
                    convertView.setTag(holder);

                }
                else
                {
                    holder = (ViewHolder) convertView.getTag();
                }


                return convertView;
            }
            public static class ViewHolder {
                public TextView txtname,txtaddress,txtdist;
                public ImageView image;

            }


        }

    //Call Main Activity
    package com.example.androidlistview;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.net.HttpURLConnection;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.util.ArrayList;

    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;

    import android.app.Activity;
    import android.app.ProgressDialog;
    import android.os.AsyncTask;
    import android.os.Bundle;
    import android.os.Parcelable;
    import android.util.Log;
    import android.view.View;
    import android.widget.AbsListView;
    import android.widget.AbsListView.OnScrollListener;
    import android.widget.LinearLayout;
    import android.widget.ListView;

    public class MainActivity extends Activity implements OnScrollListener{
    int currentFirstVisibleItem,currentVisibleItemCount,currentScrollState,total;
    int selection=0;
        ProgressDialog pd_load;
        ListView lst_list;
        String MSG;
        LinearLayout ll;
        ArrayList ListArray;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            ListArray = new ArrayList();
            new GetList().execute();
            lst_list = (ListView)findViewById(R.id.lst_list);
            lst_list.setOnScrollListener(this);
        }

        public class GetList extends AsyncTask
        {

            @Override
            protected void onPreExecute() {
                // TODO Auto-generated method stub
                super.onPreExecute();
    //          pd_load = new ProgressDialog(MainActivity.this);
    //          pd_load.setMessage("Loading...");
    //          pd_load.show();

                ll = (LinearLayout)findViewById(R.id.ll_load);
                ll.setVisibility(View.VISIBLE);

            }

            @Override
            protected Void doInBackground(Void... params) {
                // TODO Auto-generated method stub
                getdata();
                return null;
            }

            @Override
            protected void onPostExecute(Void result) {
                // TODO Auto-generated method stub
    //          if(pd_load.isShowing())
    //          {
    //              pd_load.dismiss();
    //          }

                ll.setVisibility(View.GONE);

                CustomAdapter cst = new CustomAdapter(MainActivity.this, ListArray);
                lst_list.setAdapter(cst);
                lst_list.setSelection(selection);
                super.onPostExecute(result);
            }


            public void getdata()
            {
                try
                {
                    URL url = new URL("url");
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                            connection.connect();
                            int code = connection.getResponseCode();
                            if (code != 200) {
                            MSG = "Internet connection not available";
                            //setContentView(R.layout.webimg);
                            } else {
                            BufferedReader dis = new BufferedReader(
                            new InputStreamReader(connection.getInputStream()));

                            String myString, Result = dis.readLine();

                            while ((myString = dis.readLine()) != null) {
                            Result += myString;
                            }


                            JSONObject jsonObject = new JSONObject(Result);

                            JSONArray jsarr = jsonObject.getJSONArray("posts");

                            int arraysize = jsarr.length();



                            for(int i=0;i


    

        

            

            

             

        

            
        

        

            

            

            

                

                
                

                

                
                

                

                
                

                

                
                

                

                
                
            

            
        
    





//main.xml