Per Android guidelines, double touch drag up should decrease content scale and double touch drag down should increase content scale. This is also the behavior in the official Google Maps Android application. http://developer.android.com/design/patterns/gestures.html
<vector<tile>>map
http://www.opensciencemap.org
VTM is part of the OpenScienceMap project and developed at University of Bremen.
Features
- Java map library
- OpenGL vector-tile rendering
- Themeable vector layers
- Support for multiple tile sources:
- primary opensciencemap (.vtm)
- mapsforge files
- experimental mapnik-vector-tile source
- bitmap: any quadtree-scheme tiles as texture
- Backends:
- Android
- Desktop (using libgdx/LwjGL)
- HTML5/WebGL (using libgdx/GWT)
- iOS (using libgdx/robovm)
Projects
- vtm contains the core library
- vtm-android Android backend (no libgdx required)
- vtm-android-example provides examples using vtm-android
- vtm-android-app opensciencemap app using vtm-android
- vtm-gdx common libgdx backend code
- vtm-android-gdx Android application
- vtm-desktop Desktop application
- vtm-web HTML5/GWT backend
- vtm-web-app HTML5/GWT application
- vtm-ios iOS application
Getting started
git clone --recursive https://github.com/opensciencemap/vtm
Install Android SDK and build-tools 19.0.1. From extras add 'Android Support Library/Repository' and 'Google Repository'. The commands below should set things up correctly when Android SDK is already installed.
export ANDROID_HOME=/path/to/your/android-sdk
./android-stuff.sh
Eclipse
./gradlew eclipse
Import all 'vtm' sub-projects into Eclipse.
Android-Studio
Just import build.gradle
Gradle
You can run gradle tasks directly (see also ./gradlew -q tasks
):
./gradlew clean install
to build the libraries and add them to the local maven repository.
./gradlew :vtm-android-example:run
to run the android example
./gradlew :vtm-gdx-desktop:run
to run the desktop demo (only Linux64 and Win64 native libs are provided atm)
./gradlew :vtm-gdx-html:jettyDraftWar
to run the webgl demo
WebGL Demo
- hold right mouse button to change view direction
- Keys:
g
toggle tile-grid layerd
default-t
tubes-r
osmarender-theme
Credits
This library contains code from several projects:
- mapsforge: based on 0.2.4 (http://mapsforge.org)
- osmdroid: some overlay classes (http://code.google.com/p/osmdroid/)
- libgdx: AsyncTask, MathUtils and Interpolation classes (https://github.com/libgdx)
- Android: some Matrix code, TimSort (http://source.android.com)
- tessellate: (https://github.com/cscheid/tessellate)