title: How to implement getFilter on a BaseAdapter?
body: <p>I am trying to implement a getFilter() on a base adapter to filter out search results on a List. Is there any example of how to implement a getFilter()?</p>
  
  <p>MainActivity.java</p>
  
  <pre><code>   final AppInfoAdapter adapter = new AppInfoAdapter(this, Utilities.getSystemFilteredApplication(this), getPackageManager());
  
  
          public void onTextChanged(CharSequence s, int start, int before,
                  int count) {
             adapter.getFilter().filter(s); //Filter from my adapter
             adapter.notifyDataSetChanged(); //Update my view
          }
  </code></pre>
  
  <p>AppInfoAdapter.java</p>
  
  <pre><code>package com.example.permission;
  
  import java.util.List;
  
  import android.content.Context;
  import android.content.pm.ApplicationInfo;
  import android.content.pm.PackageManager;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.ArrayAdapter;
  import android.widget.BaseAdapter;
  import android.widget.Filter;
  import android.widget.Filterable;
  import android.widget.ImageView;
  import android.widget.TextView;
  
  public class AppInfoAdapter extends BaseAdapter implements Filterable{
      private Context mContext;
      private List mListAppInfo;
      PackageManager mPackManager;
  
      public AppInfoAdapter(Context c, List list, PackageManager pm) {
          mContext = c;
          mListAppInfo = list;
          mPackManager = pm;
      }
  
      public int getCount() {
          return mListAppInfo.size();
      }
  
  
      public Object getItem(int position) {
          return mListAppInfo.get(position);
      }
  
  
      public long getItemId(int position) {
          return position;
      }
  
      public View getView(int position, View convertView, ViewGroup parent) {
          // get the selected entry
          ApplicationInfo entry = (ApplicationInfo) mListAppInfo.get(position);
  
          // reference to convertView
          View v = convertView;
  
          // inflate new layout if null
          if(v == null) {
              LayoutInflater inflater = LayoutInflater.from(mContext);
              v = inflater.inflate(R.layout.layout_appinfo, null);
          }
  
          // load controls from layout resources
          ImageView ivAppIcon = (ImageView)v.findViewById(R.id.ivIcon);
          TextView tvAppName = (TextView)v.findViewById(R.id.tvName);
          TextView tvPkgName = (TextView)v.findViewById(R.id.tvPack);
  
          // set data to display
          ivAppIcon.setImageDrawable(entry.loadIcon(mPackManager));
          tvAppName.setText(entry.loadLabel(mPackManager));
          tvPkgName.setText(entry.packageName);
  
          // return view
          return v;
      }
  
      public Filter getFilter() {
          // TODO Auto-generated method stub
          return null;
      }
  
  
  }
  </code></pre>
  
  <p>EDIT: Edited the code and added full AppInfoAdapter.java</p>