最近在學習 Android 地圖相關的知識，無意間找到了一個非常好的開源專案，特此分享。

專案地址：http://code.google.com/p/big-planet-tracks/ 

注：上面網站中的程式編譯可能會出錯，特上傳一份成功編譯的原始碼。

Big Planet Tracks

Big Planet Tracks is an online/offline maps application that can import, export and record your GPS tracks, and shows live/real-time statistics such as time, speed, distance, and elevation.

For more information, please see the changelog, copyright and license.

Features

• Maps Usage
  • Online maps (Network needed)
  • Offline maps (SQLite database created by using Mobile Atlas Creator 1.7 or 1.8)
  • Change different SQLite database maps dynamically (e.g. Taiwan.sqlitedb, Japan.sqlitedb, and so on.)
  • Map zoom in/out
  • Go to my location (i.e. auto-follow the GPS locations) on the map
  • Search (Network needed)
  • Bookmarks
  • Adjust map offset (mainly solve the map shift issue in China)
  • Reference scale on the map
  • Keep the screen on when viewing the map
  • Orange arrow for indicating the phone's direction using the magnetic heading function from source code of MyTracks
  • Map magnifications (including 1.5x, 2.0x, 2.5x, 3.0x levels)
• GPS Tracks Management
  • Import GPS track files (.gpx) into the database
  • Record GPS track and display on the map simultaneously
  • Export GPS track to a file (.gpx)
  • Show a GPS track's time, distance, average speed, maximum speed and number of waypoints
  • Full support all timezones, show the correct GMT time of GPS tracks
  • Display the loaded track and the recording track on the map simultaneously
  • Enable the background service when recording a track
• Full support for different screen resolutions of the mobile phones

HowTo

• How To Save Google Maps For Offline Use On Android (in English or in Chinese)

Screenshots

About	Menu

Start Recording Button	Notification: Recording your track	Stop Recording Button

Import Tracks	Browse Tracks	View Track Statistics