Android example source code file (TrackerListHelper.java)

This example Android source code file (TrackerListHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, app, content, context, cursor, desc, listactivity, override, resourcecursoradapter, sort_order, string, textview, trackeradapter, trackerdatahelper, trackerlisthelper, ui, view, widget

The TrackerListHelper.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.android.locationtracker.data;

import android.app.ListActivity;
import android.content.Context;
import android.database.Cursor;
import android.view.View;
import android.widget.ResourceCursorAdapter;
import android.widget.TextView;

import com.android.locationtracker.R;

/**
 * Used to bind Tracker data to a list view UI
 */
public class TrackerListHelper extends TrackerDataHelper {

    private ListActivity mActivity;

    // sort entries by most recent first
    private static final String SORT_ORDER = TrackerEntry.ID_COL + " DESC";

    public TrackerListHelper(ListActivity activity) {
        super(activity, TrackerDataHelper.CSV_FORMATTER);
        mActivity = activity;
    }

    /**
     * Helper method for binding the list activities UI to the tracker data
     * Tracker data will be sorted in most-recent first order
     * Will enable automatic UI changes as tracker data changes
     *
     * @param layout - layout to populate data
     */
    public void bindListUI(int layout) {
        Cursor cursor = mActivity.managedQuery(TrackerProvider.CONTENT_URI,
                TrackerEntry.ATTRIBUTES, null, null, SORT_ORDER);
        // Used to map tracker entries from the database to views
        TrackerAdapter adapter = new TrackerAdapter(mActivity, layout, cursor);
        mActivity.setListAdapter(adapter);
        cursor.setNotificationUri(mActivity.getContentResolver(),
                TrackerProvider.CONTENT_URI);

    }

    private class TrackerAdapter extends ResourceCursorAdapter {

        public TrackerAdapter(Context context, int layout, Cursor c) {
            super(context, layout, c);
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            final TextView v = (TextView) view
                    .findViewById(R.id.entrylist_item);
            String rowText = mFormatter.getOutput(TrackerEntry
                    .createEntry(cursor));
            v.setText(rowText);
        }
    }
}