MarkerDetailActivity.java

/*
 * Copyright 2009 Google Inc.
 * 
 * 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.google.android.apps.mytracks;

import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
import com.google.android.apps.mytracks.content.Waypoint;
import com.google.android.apps.mytracks.fragments.DeleteMarkerDialogFragment.DeleteMarkerCaller;
import com.google.android.apps.mytracks.fragments.MarkerDetailFragment;
import com.google.android.maps.mytracks.R;

import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;

import java.util.ArrayList;

/**
 * An activity to display marker detail info.
 * 
 * @author Leif Hendrik Wilden
 */
public class MarkerDetailActivity extends AbstractMyTracksActivity implements DeleteMarkerCaller {

  public static final String EXTRA_MARKER_ID = "marker_id";
  private static final String TAG = MarkerDetailActivity.class.getSimpleName();

  private Waypoint waypoint;
  private ArrayList<Long> markerIds;

  @Override
  protected void onCreate(Bundle bundle) {
    super.onCreate(bundle);

    long markerId = getIntent().getLongExtra(EXTRA_MARKER_ID, -1L);
    if (markerId == -1L) {
      Log.d(TAG, "invalid marker id");
      finish();
      return;
    }

    MyTracksProviderUtils myTracksProviderUtils = MyTracksProviderUtils.Factory.get(this);
    waypoint = myTracksProviderUtils.getWaypoint(markerId);

    markerIds = new ArrayList<Long>();
    int markerIndex = -1;
    Cursor cursor = null;

    try {
      cursor = myTracksProviderUtils.getWaypointCursor(waypoint.getTrackId(), -1L, -1);
      if (cursor != null && cursor.moveToFirst()) {
        /*
         * Yes, this will skip the first waypoint and that is intentional as the
         * first waypoint holds the stats for the track.
         */
        while (cursor.moveToNext()) {
          Waypoint current = myTracksProviderUtils.createWaypoint(cursor);

          markerIds.add(current.getId());
          if (current.getId() == markerId) {
            markerIndex = markerIds.size() - 1;
          }
        }
      }
    } finally {
      if (cursor != null) {
        cursor.close();
      }
    }

    ViewPager viewPager = (ViewPager) findViewById(R.id.maker_detail_activity_view_pager);
    viewPager.setAdapter(new MarkerDetailPagerAdapter(getSupportFragmentManager()));
    if (markerIndex != -1) {
      viewPager.setCurrentItem(markerIndex);
    }
  }

  @Override
  protected int getLayoutResId() {
    return R.layout.marker_detail_activity;
  }

  @Override
  public void onDeleteMarkerDone() {
    runOnUiThread(new Runnable() {
        @Override
      public void run() {
        finish();
      }
    });
  }

  /**
   * Marker detail pager adapter.
   * 
   * @author Jimmy Shih
   */
  private class MarkerDetailPagerAdapter extends FragmentStatePagerAdapter {

    public MarkerDetailPagerAdapter(FragmentManager fragmentManager) {
      super(fragmentManager);
    }

    @Override
    public Fragment getItem(int position) {
      String title = getString(R.string.marker_title, position + 1, getCount());
      return MarkerDetailFragment.newInstance(markerIds.get(position), title);
    }

    @Override
    public int getCount() {
      return markerIds.size();
    }
  }
}