How to Send ArrayList into different class

Question

I really confused to think the way to send ArrayList into different class, i have an ArrayList named = AgenList and i want to send it into different class that extend BaseAdapter, is there anyone that can help me to solve my problem..? this is my source code : 1. MainActivity.java

public class MainActivity extends Activity {    
List AgenList = new ArrayList();
boolean boolStatusKoneksi=true;
private ProgressDialog Dialog;
protected Context applicationContext;



@Override
public void onCreate(Bundle savedInstanceState){
    new AgenAsyncTask().execute();
    super.onCreate(savedInstanceState);     
    setContentView(R.layout.mainmenu);
    GridView gridview = (GridView) findViewById(R.id.gridview);
    gridview.setAdapter(new TesAdapter(this));
}
public class AgenAsyncTask extends AsyncTask<String, String, String>
{

@Override
    protected void onPreExecute() {
        super.onPreExecute();
        Dialog = new ProgressDialog(MainActivity.this);
        Dialog.setMessage("Mohon Tunggu sebentar...");
        Dialog.setIndeterminate(false);
        Dialog.setCancelable(true);
        Dialog.show();
    }
protected String doInBackground(String... args) {


String url = ("http://www.abc.com/xyz.php");
              try{
                  JSONParser j=new JSONParser();
                    JSONArray jsonArray = j.takeJson(url);
                  for(int i =0; i<jsonArray.length(); i++)
                  {
                      JSONObject c  = jsonArray.getJSONObject(i);
                        HashMap<String, String> map = new HashMap<String, String>();
                        if (c.has("atasan")) 
                            map.put("atasan", c.get("atasan").toString());
                        if (c.has("nama_agen")) 
                            map.put("nama_agen", c.get("nama_agen").toString());
                        if (c.has("kode_agen")) 
                            map.put("kode_agen", c.get("kode_agen").toString());
                        if (c.has("no_aaji")) 
                            map.put("no_aaji", c.get("no_aaji").toString());
                        if (c.has("jenis")) 
                            map.put("jenis", c.get("jenis").toString());
                          AgenList.add(map);


                     }
                } catch (JSONException e) {
                    e.printStackTrace();
                    }
              return null;
                }
    @Override
protected void onPostExecute(String arg) {Dialog.dismiss();}

As you see, i have an arrayList Named AgenList that containing JSONArray that i want to send into TesAdapter.java so this is the TesAdapter.java :

public class TesAdapter extends BaseAdapter{
private LayoutInflater layout;

public TesAdapter(MainActivity context) {
layout = LayoutInflater.from(context);
List AgenList = new ArrayList();
}

@Override
public int getCount() {
    return (Integer) null;
}

@Override
public Object getItem(int position) {
    return 0;
}

        @Override
        public long getItemId(int position) {
            return position;
        }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        convertView= layout.inflate(R.layout.list_item,parent,false);
        holder = new ViewHolder();

        holder.ATASAN = (TextView) convertView.findViewById(R.id.atasan);
        holder.NAMA_AGEN= (TextView) convertView.findViewById(R.id.nama_agen);
        holder.KODE_AGEN= (TextView)convertView.findViewById(R.id.kode_agen);
        holder.NO_AAJI= (TextView) convertView.findViewById(R.id.no_aaji);
        holder.JENIS= (TextView) convertView.findViewById(R.id.jenis);
        return convertView;

    }

}

 class ViewHolder{
    TextView ATASAN;
    TextView NAMA_AGEN;
    TextView KODE_AGEN;
    TextView NO_AAJI;
    TextView JENIS;

}

i hope somebody can help me to solve this problem, thanks

SomeShinyObject · Accepted Answer · 2013-04-08T05:52:38.890

0

Simplest way is to add an ArrayList property to the BaseAdapter class.

Then, in the class where you instantiate a new BaseAdapter, pass your ArrayList in the constructor.

public class Foo {
    public void createBaseAdapter() {
        ArrayList arList = new ArrayList();
        BaseAdapter ba = new BaseAdapter(arList);
    }
}

public class BaseAdapter {
    ArrayList arList;
    public BaseAdapter(ArrayList arList) {
        this.arList = arList;
    }
}

In your case

public TesAdapter(MainActivity context, ArrayList list) {
    layout = LayoutInflater.from(context);
    this.AgenList = list; //Declared as a class property
}

edited Apr 08 '13 at 05:52

answered Apr 08 '13 at 04:27

SomeShinyObject

6,986
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can you tell me how to pass my ArrayList in the constructor..? – Aoyama Nanami Apr 08 '13 at 04:32
@AoyamaNanami There you go. Updated with a sample. – SomeShinyObject Apr 08 '13 at 04:38

score 0 · Answer 2 · answered Apr 08 '13 at 04:30

0

Using public static modifier.

public static List AgenList = new ArrayList();

In other class using : MainActivity.AgenList to using AgenList

answered Apr 08 '13 at 04:30

Tuan Vu

5,827
2
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score 0 · Answer 3 · answered Apr 08 '13 at 04:32

0

According to me. the simplest way is to public getAgentList method in your MainActivity class which can be called from TesAdapter.Offcourse there are other ways also.

answered Apr 08 '13 at 04:32

Jaydeep Rajput

3,359
14
35

score 0 · Answer 4 · answered Apr 08 '13 at 04:32

0

Send ArrayList into different class

use TesAdapter constructor for sending ArrayList from MainActivity to TesAdapter. you will need to use onPostExecute method for adding adapter to GridView instead of onCreate method of Activity:

Change TesAdapter constructor as:

public class TesAdapter extends BaseAdapter{
 private LayoutInflater layout;
 List AgenList;
 Context context;
 public TesAdapter(Context context,List AgenList) {
 layout = LayoutInflater.from(context);
 this.AgenList = AgenList;
}
....

and from onPostExecute add adapter to GridView as:

@Override
protected void onPostExecute(String arg) {
 GridView gridview = (GridView)MainActivity.this. findViewById(R.id.gridview);
 gridview.setAdapter(new TesAdapter(MainActivity.this,AgenList));
 Dialog.dismiss();
}

answered Apr 08 '13 at 04:32

ρяσѕρєя K

127,886
50
184
206

so how about this code : GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setAdapter(new TesAdapter(this)); that i have put at the first code? – Aoyama Nanami Apr 08 '13 at 04:35
just comment it and also you are not starting AgenAsyncTask. put `new AgenAsyncTask().execute("");` in onCreate method – ρяσѕρєя K Apr 08 '13 at 04:37
i've started my AsyncTasck at : public void onCreate(Bundle savedInstanceState){ new AgenAsyncTask().execute(); ....} ... – Aoyama Nanami Apr 08 '13 at 04:41
@AoyamaNanami: move it after setContentView method – ρяσѕρєя K Apr 08 '13 at 04:42
it doesn't work, the logcat said there's something eror in this line : gridview.setAdapter(new TesAdapter(MainActivity.this,AgenList)); – Aoyama Nanami Apr 08 '13 at 04:48
@AoyamaNanami : ok plz post logcat with question – ρяσѕρєя K Apr 08 '13 at 04:52
i've fix it...there's no error, but the writting not displayed... do you know why..? – Aoyama Nanami Apr 08 '13 at 07:22

score 0 · Answer 5 · answered Apr 08 '13 at 04:34

0

You can pass that arraylist through the construct or of the other class. Create a class member arraylist in other class. Then do this in constructor this.agentlist=passedAgentList

answered Apr 08 '13 at 04:34

Vishal Vijay

2,334
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How to Send ArrayList into different class

5 Answers5

In your case