List View adapter not working, getView not called.

android, android-arrayadapter, android-listview, java

Solution

Main problem is

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

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return 0;
    }

change it to

@Override
    public int getCount() {
        // TODO Auto-generated method stub
        return mData.length;
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return mData[arg0];
    }

Check out this Vogella Tutorial on List View & List Activity, Try to use `ViewHolder` in List Adapter it will increase your view performance.

Problem

I think i'm turning crazy. Something so simple has bind a custom adapter to a Listview is giving me a headache. Post the code and explain then: MainActivity.java ``` package com.example.pruebalist; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.ListView; public class MainActivity extends Activity { private static String[] data = new String[] {"0","1","2","3"}; public void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); Log.v("MainActivity","Inside MainActivity"); setContentView(R.layout.main); ListView lstView = (ListView)findViewById(R.id.listNoticias); ArrayAdapter<String> adapter = new LstAdapter(this, R.layout.row, data); lstView.setAdapter(adapter); } } ``` LstAdapter.java ``` package com.example.pruebalist; import android.app.Activity; import android.content.Context; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; public class LstAdapter extends ArrayAdapter<String>{ private String[] mData; private Context mContext; int layoutResourceId; public LstAdapter(Context context, int textViewResourceId, String[] values) { super(context, textViewResourceId, values); mContext = context; mData = values; layoutResourceId = textViewResourceId; Log.v("LstAdapter","Inside LstAdapter"); } @Override public int getCount() { // TODO Auto-generated method stub return 0; } @Override public long getItemId(int arg0) { // TODO Auto-generated method stub return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub View v = convertView; Log.v("LstAdapter","Inside getView"); if(v==null){ LayoutInflater inflater = ((Activity)mContext).getLayoutInflater(); v = inflater.inflate(layoutResourceId, parent,false); } String item = mData[position]; if(item!=null){ TextView txtItem = (TextView)v.findViewById(R.id.texto); if(txtItem!=null){ txtItem.setText(item); } } return v; } } ``` The ListView is never show. And getView is never used, logCat doesn't show "Inside Getview". What's wrong?

Original source