First time plugin creation problems

Hi,

I'm having some problems creating my first Unity3D plugin for Android. I'm trying to create a plugin for an exisiting Android plugin which comes in a Jar file. I keep getting a fatal exception that the class can't be found, but I don't know what i'm doing wrong

The Jar file from the exisiting plugin is placed in the libs folder in my eclipse folder. The same goes for classes.jar which I got from Unity3D. I've added the jar files to the build path in the eclipse project.

Adroid Logcat error:

Code (CSharp):

1. 07-24 17:54:19.880: E/AndroidRuntime(26189): FATAL EXCEPTION: main
2. 07-24 17:54:19.880: E/AndroidRuntime(26189): Process: com.unity3d.JavaPlugin, PID: 26189
3. 07-24 17:54:19.880: E/AndroidRuntime(26189): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.unity3d.JavaPlugin/nl.banzaibandit.plugin.UnityBridge}: java.lang.ClassCastException: nl.banzaibandit.plugin.UnityBridge cannot be cast to android.app.Activity
4. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2514)
5. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
6. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread.access$800(ActivityThread.java:156)
7. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
8. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.os.Handler.dispatchMessage(Handler.java:102)
9. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.os.Looper.loop(Looper.java:157)
10. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread.main(ActivityThread.java:5872)
11. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at java.lang.reflect.Method.invokeNative(Native Method)
12. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at java.lang.reflect.Method.invoke(Method.java:515)
13. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:852)
14. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:668)
15. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at dalvik.system.NativeStart.main(Native Method)
16. 07-24 17:54:19.880: E/AndroidRuntime(26189): Caused by: java.lang.ClassCastException: nl.banzaibandit.plugin.UnityBridge cannot be cast to android.app.Activity
17. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.Instrumentation.newActivity(Instrumentation.java:1079)
18. 07-24 17:54:19.880: E/AndroidRuntime(26189):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2505)
19. 07-24 17:54:19.880: E/AndroidRuntime(26189):     ... 11 more
20.  

Android Manifest Eclipse project:

Code (CSharp):

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3.     package="nl.banzaibandit.plugin"
4.     android:versionCode="1"
5.     android:versionName="1.0" >
6.  
7.     <uses-permission android:name="android.permission.INTERNET"/>
8.     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
9.     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
10.     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
11.     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
12.     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
13.       <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
14.       <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
15.  
16.     <uses-sdk
17.         android:minSdkVersion="14"
18.         android:targetSdkVersion="18" />
19.  
20.     <application
21.         android:icon="@drawable/ic_launcher"
22.         android:label="@string/app_name" >
23.         <activity
24.             android:name="nl.banzaibandit.plugin.UnityBridge"
25.             android:screenOrientation="portrait"
26.             android:label="@string/app_name" >
27.             <intent-filter>
28.                 <action android:name="android.intent.action.MAIN" />
29.  
30.                 <category android:name="android.intent.category.LAUNCHER" />
31.             </intent-filter>
32.         </activity>
33.  
34.         <activity android:name="nl.banzaibandit.plugin.IndoorAtlasExample" />
35.  
36.     </application>
37.  
38. </manifest>

UnityBridge.java code:

Code (CSharp):

1. package nl.banzaibandit.plugin;
2.  
3. import android.content.Context;
4. import android.os.Bundle;
5.  
6. import com.indooratlas.android.IndoorAtlasListener;
7. import com.indooratlas.android.ServiceState;
8. import com.unity3d.player.UnityPlayerActivity;
9.  
10. public class UnityBridge
11. {
12.     public static Context mContext;
13.  
14.     private IndoorAtlasExample example;
15.  
16.     public int GetInt()
17.     {
18.         example = new IndoorAtlasExample();
19.         return 120;
20.     }
21. }

IndoorAtlasExample.java code:

Code (CSharp):

1. package nl.banzaibandit.plugin;
2.  
3. import com.indooratlas.android.*;
4. import com.unity3d.player.UnityPlayerActivity;
5.  
6. import android.app.Activity;
7. import android.os.Bundle;
8. import android.os.Handler;
9. import android.util.Log;
10. import android.view.View;
11. import android.view.View.OnClickListener;
12. import android.widget.Button;
13. import android.widget.ImageView;
14. import android.widget.TextView;
15. import android.graphics.Bitmap;
16. import android.graphics.Canvas;
17. import android.graphics.Paint;
18.  
19.  
20. public class IndoorAtlasExample extends Activity implements IndoorAtlasListener {
21.  
22.     // set the TAG string title
23.     private static final String TAG = "IndoorAtlasExample";
24.  
25.     // Declare the textview variable here
26.     private TextView textView;
27.  
28.     // Declare the Handler variable here
29.     private Handler handler = new Handler();
30.  
31.     // Declare the IndoorAtlas application variable here
32.     private IndoorAtlas indoorAtlas;
33.  
34.     // Create the button variable
35.     Button button;
36.  
37.     // Create the image variable
38.     ImageView image;
39.  
40.     // API key
41.     private final String apiKey = "";
42.      
43.     // Secret key
44.     private final String secretKey = "!";
45.      
46.     // Building-id:
47.     private final String building_ID = "";
48.  
49.     // Floor-id:
50.     private final String floor_ID = "";
51.  
52.     // Graphics-id:
53.     private final String graphics_ID = "";
54.  
55.  
56.     private boolean calibrated = false;
57.  
58.     /** Called when the activity is first created. */
59.     @Override
60.     public void onCreate(Bundle savedInstanceState) {
61.  
62.         Log.d(TAG, "onCreate -State-");
63.      
64.         super.onCreate(savedInstanceState);
65.      
66.         try {
67.             // Get handle to the IndoorAtlas API
68.             // Throws exception when the cloud service cannot be reached
69.             // Get your Apikey and Secret key from IndoorAtlas My Account
70.             indoorAtlas = IndoorAtlasFactory.createIndoorAtlas(
71.                     this.getApplicationContext(),
72.                     this,
73.                     apiKey,
74.                     secretKey);
75.  
76.          
77.         } catch (IndoorAtlasException ex) {
78.             showMessageOnUI("Failed to connect to IndoorAtlas. Check your credentials.");
79.             Log.e(TAG, "Failed to connect to IndoorAtlas. Check your credentials.");
80.             this.finish();
81.         }
82.     }
83.  
84.     public int GetInt()
85.     {
86.         return 129;
87.     }
88.  
89.     @Override
90.     public void onStop() {
91.  
92.         Log.d(TAG, "onStop() -State- : calibrated = "+calibrated);
93.  
94.         try {
95.             showMessageOnUI("onStop(): Stopping positioning.");
96.  
97.             // Stop positioning when not needed
98.             indoorAtlas.stopPositioning();
99.  
100.         } catch (Exception e) {
101.             e.printStackTrace();
102.         }
103.  
104.         super.onStop();
105.     }
106.  
107.     @Override
108.     protected void onPause()
109.     {
110.         Log.d(TAG, "onPause() -State- : calibrated = "+calibrated);
111.      
112.         showMessageOnUI("onPause(): Stopping positioning.");
113.      
114.  
115.         // Stop positioning when not needed
116.         indoorAtlas.stopPositioning();
117.  
118.         super.onPause();
119.      
120.     }
121.  
122.     @Override
123.     protected void onRestart()
124.     {
125.         Log.d(TAG, "onRestart() -State- : calibrated = "+calibrated);
126.  
127.         super.onRestart();
128.      
129.         showMessageOnUI("onRestart().");
130.      
131.     }
132.  
133.  
134.     @Override
135.     protected void onResume()
136.     {
137.         Log.d(TAG, "onResume() -State- : calibrated = "+calibrated);
138.         super.onResume();
139.      
140.         if(calibrated == false)
141.         {
142.             // Prompts user to perform Figure "8" calibration motion
143.             showMessageOnUI("onResume(): Calibrating... Figure \"8\" motion until onCalibrationFinished() or onCalibrationFailed() is called");
144.  
145.             // Starts the calibration, once completed the onCalibrationFinished() is called
146.             indoorAtlas.calibrate();
147.         }
148.         else
149.         {
150.          
151.             showMessageOnUI("onResume(): Starting positioning.");
152.          
153.             indoorAtlas.startPositioning(building_ID, floor_ID,
154.                     graphics_ID, false);
155.         }
156.  
157.     }
158.  
159.  
160.  
161.     // Called on every new location estimate
162.     public void onServiceUpdate(ServiceState state) {
163.  
164.         Log.d(TAG, "onServiceUpdate()");
165.      
166.      
167.         // Create application here...
168.      
169.      
170.      
171.         // Use location estimate
172.         final String s = new String(
173.                 "Roundtrip : " + state.getRoundtrip()+ "ms\n\n"
174.                 + "Lat : "+ state.getGeoPoint().getLatitude() + "\n\n"
175.                 + "Lon : "+ state.getGeoPoint().getLongitude() + "\n\n"
176.                 + "X [meter] : "+ state.getMetricPoint().getX() + "\n\n"
177.                 + "Y [meter] : "+ state.getMetricPoint().getY() + "\n\n"
178.                 + "I [pixel] : "+ state.getImagePoint().getI() + "\n\n"
179.                 + "J [pixel] : "+ state.getImagePoint().getJ()) + "\n\n"
180.                 + "Heading : "+ state.getHeadingDegrees() + "\n\n"
181.                 + "Probability : "+ state.getProbability();
182.      
183.         //final String XandY = new String("The X = " + state.getMetricPoint().getX() + "\n\n"
184.         //        + " The Y = " +state.getMetricPoint().getY());
185.      
186.         // Show the values on screen
187.         showMessageOnUI(s);
188.      
189.         Double probe = new Double(state.getProbability());
190.      
191.         if (probe == 1.0)
192.         {
193.          
194.             showMessageOnUI("SET POINTER HERE");
195.          
196.      
197.         // Load the pointer-image here
198.      
199.             //createBitMap(); // this could be changed
200.      
201.         // Update Pointer on X and Y position
202.          
203.          
204.          
205.         }
206.      
207.     }
208.  
209.  
210.     private void createBitMap() {
211.         // Create a mutable bitmap
212.      
213.         Bitmap bitMap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
214.  
215.         bitMap = bitMap.copy(bitMap.getConfig(), true);
216.         // Construct a canvas with the specified bitmap to draw into
217.         Canvas canvas = new Canvas(bitMap);
218.         // Create a new paint with default settings.
219.         Paint paint = new Paint();
220.         // smooths out the edges of what is being drawn
221.         paint.setAntiAlias(true);
222.         // set color
223.       //  paint.setColor(Color.BLACK);
224.         // set style
225.         paint.setStyle(Paint.Style.STROKE);
226.         // set stroke
227.         paint.setStrokeWidth(4.5f);
228.         // draw circle with radius 30
229.         canvas.drawCircle(50, 50, 30, paint);
230.         // set on ImageView or any other view
231.         image.setImageBitmap(bitMap);
232.  
233.     }
234.  
235.  
236.     // Request failed
237.     public void onServiceFailure(final String reason) {
238.         Log.d(TAG, "onServiceFailure(): reason : " + reason);
239.         showMessageOnUI("onServiceFailure(): reason : " + reason);
240.     }
241.  
242.     // Initializing location service
243.     public void onServiceInitializing() {
244.         Log.d(TAG, "onServiceInitializing()");
245.         showMessageOnUI("onServiceInitializing()");
246.     }
247.  
248.     // Initialization completed
249.     public void onServiceInitialized() {
250.         Log.d(TAG, "onServiceInitialized()");
251.         showMessageOnUI("onServiceInitialized(): Walk to get location fix");
252.     }
253.  
254.     // Location service initialization failed
255.     public void onInitializationFailed(final String reason) {
256.         Log.d(TAG, "onInitializationFailed()");
257.         showMessageOnUI("onInitializationFailed(): "+ reason);
258.     }
259.  
260.     // Positioning was stopped
261.     public void onServiceStopped() {
262.         Log.d(TAG, "onServiceStopped()");
263.         showMessageOnUI("onServiceStopped(): IndoorAtlas Positioning Service is stopped.");
264.     }
265.  
266.     // Calibration failed
267.     public void onCalibrationFailed(String reason) {
268.         Log.d(TAG, "onCalibrationFailed(), reason : "+reason);
269.         showMessageOnUI("onCalibrationFailed(): Calibration failed, reason : "+reason);
270.     }
271.  
272.     // Calibration successful, positioning can be started
273.     public void onCalibrationFinished() {
274.         Log.d(TAG, "onCalibrationFinished()");
275.  
276.         showMessageOnUI("onCalibrationFinished(): starting positioning.");
277.  
278.         calibrated = true;
279.      
280.         // Use Floor Plans tool to get IDs for building, level and floor plan
281.      
282.         // Setting the last parameter true tries to switch to Mobile network for
283.         // the positioning session.
284.         // Otherwise WiFi network will be used, if available.
285.  
286.         indoorAtlas.startPositioning(building_ID, floor_ID,
287.                 graphics_ID, false);
288.     }
289.  
290.     // Helper method
291.     private void showMessageOnUI(final String message) {
292.         handler.post(new Runnable() {
293.             public void run() {
294.                 textView.setText(message);
295.             }
296.         });
297.  
298.     }
299.  
300. }
301.  

Android Manifest in Unity3D project:

Code (CSharp):

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3.     package="nl.banzaibandit.plugin"
4.     android:versionCode="1"
5.     android:versionName="0.1.1" >
6.  
7.  
8.     <uses-permission android:name="android.permission.INTERNET"/>
9.     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
10.     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
11.     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
12.  
13.  
14.       <application android:icon="@drawable/app_icon"
15.                       android:label="@string/app_name"
16.                       android:debuggable="true">
17.    
18.           <activity
19.               android:name="nl.banzaibandit.plugin.UnityBridge"
20.               android:label="@string/app_name" >
21.            
22.               <intent-filter>
23.                 <action android:name="android.intent.action.MAIN" />
24.                 <category android:name="android.intent.category.LAUNCHER" />
25.                </intent-filter>
26.              
27.            </activity>
28.  
29.            <activity
30.                android:name="com.indooratlas.android.IndoorAtlasListener"
31.                android:label="@string/app_name" >
32.            </activity>
33.        
34.           <activity
35.               android:name="com.unity3d.player.UnityPlayerProxyActivity"
36.               android:screenOrientation="portrait"
37.               android:label="@string/app_name" >
38.           </activity>
39.            
40.         <activity android:name="com.unity3d.player.UnityPlayerNativeActivity" android:label="@string/app_name" >
41.               <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="false" />
42.         </activity>
43.  
44.     </application>
45. </manifest>

Unity3D C# code for testing purposes:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System;
4.  
5. public class IndoorAtlasExample : MonoBehaviour {
6.  
7.  
8.     public UILabel label;
9.  
10.     private void Start()
11.     {
12.         AndroidJNI.AttachCurrentThread();
13.     }
14.  
15.     public void ButtonClick()
16.     {
17.         int number = GetCurrentActivity().Call<int>("GetInt");
18.  
19.         label.text = number.ToString();
20.     }
21.  
22.     private AndroidJavaObject GetCurrentActivity()
23.     {
24.         AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
25.         AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
26.         return activity;
27.     }
28. }

Can anyone help me get this first step working?

 

Anyone?

 

Still no answers I'm still trying to get this to work but i'm not one step closer to solving this one

 

I'm no pro at this, but it seems like your manifest is trying to create "nl.banzaibandit.plugin.UnityBridge" as the main activity, when UnityBridge does not extend from "UnityPlayerActivity", or from any activity type for that matter.
Try changing:

<activity
android:name="nl.banzaibandit.plugin.UnityBridge"
android:label="@String/app_name" >

<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

</activity>


To:

<activity android:name="com.unity3d.player.UnityPlayerProxyActivity"
android:label="@String/app_name"
android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

This should have the manifest start up unity as the main activity.

 

That will probably run, but will not be what he wants, since the main activity won't have the getInt() method on it...

 

It shouldn't need to be the main activity if you just want to call the function getInt().
If it were to run without being the main activity, and the exported jar is correctly located in Plugins/Android folder you should be able to do something like this:

AndroidJavaClass unityBridge =new AndroidJavaClass("nl.banzaibandit.plugin.UnityBridge");
int number = unityBridge.Call<int>("GetInt");