Vuforia How To Use Android Plugins in Unity Apps

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How To Use Android Plugins in Unity Apps

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This article explains how to do two things:

Take custom Android plugins that are written in Java and integrate them into a Vuforia-based Unity projectInvoke methods defined in the Java plugin from a Unity C# script.The Image Targets sample is a starting point for a Unity project example.Integrate plugins into a Vuforia-based Unity projectCreate a Unity project. For ease of reference we refer to it as QcarWithPlugin.Import the Image Targets sample package for Unity(Menu > Assets > Import custom package)Double-click the Image-Targets scene in the project view. The three Image Targets and their associated teapot models should appear in the scene view.Create a new Android project in Eclipse. For ease of reference the project is called MyPlugin, so it is assumed that the main activity will be called MyPluginActivity.Right-click on the project in Eclipse, go to Properties > Java Build Path > Libraries. Add the following two libraries as external jars (both located under the Assets/Plugins/Android/ folder of the Unity project):QCAR.jarQCARUnityPlayer.jarOpen the MyPluginActivity.java file in Eclipse, and make the following code changes:Make MyPluginActivity extend QCARPlayerActivity instead of Activity. Press Ctrl-Shift-O to adjust the imports automatically.From the onCreate() method, remove the line setContentView(…).Add a custom public method called showMessage() to the MyPluginActivity class. Fill the method with some code to display a Toast message with text.The code of your MyPluginActivity should look like the following code:Invoke methods defined in the Java pluginRight-click on your project, go to Properties > Android, and check the IsLibrary checkbox to turn your Android project into a library.This action should make Eclipse generate a .JAR file (for example, myplugin.jar) and store the file in the /bin folder of your Eclipse project.Open the /bin folder and copy the JAR library from that folder to the Assets/Plugins/Android/ folder of your Unity project.Open and edit the AndroidManifest.xml file located in the same Assets/Plugins/Android/ directory.Replace the name of the main activity with your fully qualified Activity name, for example, com.my.org.MyPluginActivity.Create a C# script, call it MyPluginCaller, for example, and attach it to each of your Image Targets in the scene (Chips, Stones, Tarmac, etc.).Copy and then paste the following code in your script. The code will make your script invoke the showMessage() method of your MyPluginActivity class whenever a target is detected:Now the project should be ready to build and run on your Android device.原文地址点击这里

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