title: how to remove list item or clearing listview using shared preferences?
body: <p>I have following base adapter custom class, creating listview and items. but i want to remove all items from the list when I click reset button.
  My code :</p>
  
  <pre><code>public class Scores extends Activity implements OnClickListener {
  
  public static final String MY_PREFS_NAME = "PrefName";
  SharedPreferences pref;
  static String[] tempTime = new String[10];
  static String[] tempScore = new String[10];
  
  private static class EfficientAdapter extends BaseAdapter {
      private LayoutInflater mInflater;
      public EfficientAdapter(Context context) {
          mInflater = LayoutInflater.from(context);
  
      }
  
      public int getCount() {
          return tempTime.length;
      }
  
      public Object getItem(int position) {
          return position;
      }
  
      public long getItemId(int position) {
          return position;
      }
  
      public View getView(int position, View convertView, ViewGroup parent) {
          ViewHolder holder;
          if (convertView == null) {
              convertView = mInflater.inflate(
                      R.layout.mathmatch_score_format, null);
              holder = new ViewHolder();
              holder.text1 = (TextView) convertView
                      .findViewById(R.id.time_text);
              holder.text2 = (TextView) convertView
                      .findViewById(R.id.score_text);
              /*final ImageView deleteButton = (ImageView) 
                      convertView.findViewById(R.id.score_reset);
              deleteButton.setOnClickListener(this);*/
              convertView.setTag(holder);
              //deleteButton.setTag(holder);
  
          } else {
              holder = (ViewHolder) convertView.getTag();
          }
  
          holder.text1.setText(tempTime[position]);
          holder.text2.setText(tempScore[position]);
  
          return convertView;
      }
  
      static class ViewHolder {
          TextView text1;
          TextView text2;
      }
  
  }
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
      setContentView(R.layout.mathmatch_score);
      setUpViews();
      pref = getSharedPreferences(MY_PREFS_NAME, 0);
      strTime = pref.getString("high_score_times", "");
      intScore = pref.getString("high_score_values", "");
      tempTime = strTime.split(",");
      tempScore = intScore.split(",");
  
      Comparator&lt;String&gt; comparator = new CustomArrayComparator&lt;String, String&gt;(tempScore, tempTime);
      Arrays.sort(tempTime, comparator);
      Arrays.sort(tempScore, Collections.reverseOrder());
      lv.setAdapter(new EfficientAdapter(this));
  }
  
  private void setUpViews() {
      lv = (ListView) findViewById(R.id.list);
      reset = (ImageView) findViewById(R.id.score_reset);
      reset.setOnClickListener(this);
  }   
  
  @Override
  protected void onPause() {
      super.onPause();
      pref = getSharedPreferences(MY_PREFS_NAME, 0);
      SharedPreferences.Editor edit = pref.edit();
      edit.putString("high_score_times", strTime);
      edit.putString("high_score_values", intScore);
      edit.commit();
  }
  @Override
  protected void onStop() {
      super.onStop();
  }
  @Override
  public void onClick(View v) {
      switch (v.getId()) {
      case R.id.score_reset:
          AlertDialog.Builder alertbox = new AlertDialog.Builder(this);
          alertbox.setTitle("Reset");
          alertbox.setMessage("Are you sure all time ans score are reset?");
  
          alertbox.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface arg0, int arg1) {
                           pref = getSharedPreferences(MY_PREFS_NAME, 0);
                          SharedPreferences.Editor edit = pref.edit();
                          /*edit.remove("high_score_times");
                          edit.remove("high_score_values");*/
  
                          /*edit.remove(intScore);
                          edit.remove(strTime);
                          */
                          //edit.clear();
                          edit.remove(MY_PREFS_NAME);
                          edit.commit();
                               }
          });
                      alertbox.setNegativeButton("No", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface arg0, int arg1) {
                  Toast.makeText(getApplicationContext(), "'No' button clicked", Toast.LENGTH_SHORT).show();
              }
          });
           alertbox.show();
             break;
        default:
          break;
  }}}
  </code></pre>
  
  <p>My reset button is not including on a list. 
  I have tried this in yes button click event in above code but could not get any update. So what to do? 
  Thanks in advance.</p>