java - Game has stopped when using Android plugin for Unity3D -

sorry bad english made android plugin unity3d v4.5 command prompt, jdk, sdk , apache ant. command "ant jar" built no errors, when try open game in mobile device, tells me: "unfortunately, thegame has stopped." mobile android 4.1.2 (api 16) , built game in api 15.

before using plugin had no problems , had no errors using apache , jdk.

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this java code "mylibrary.java" in src\com\test\app:

package com.test.app; import com.unity3d.player.unityplayeractivity; public class mylibrary extends unityplayeractivity {     public static float getvalue()     {         return 1.0f;     } }  

as see, want use float number (1.0f)

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this manifest:

<?xml version="1.0" encoding="utf-8"?> <manifest     xmlns:android="http://schemas.android.com/apk/res/android"     package="com.test.app"     android:versioncode="1"     android:versionname="1.0">     <supports-screens         android:smallscreens="true"         android:normalscreens="true"         android:largescreens="true"         android:xlargescreens="true"         android:anydensity="true"/>      <application android:label="@string/app_name" android:icon="@drawable/app_icon">         <activity android:name=".mylibrary"             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>          <activity android:name="com.unity3d.player.unityplayeractivity"                   android:label="@string/app_name"                   android:configchanges="fontscale|keyboard|keyboardhidden|locale|mnc|mcc|navigation|orientation|screenlayout|screensize|smallestscreensize|uimode|touchscreen">         </activity>      </application> </manifest> 

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and it`s c# script unity:

using unityengine; using system.collections;  public class test : monobehaviour {     androidjavaclass plugintutorialactivityjavaclass;      public string getvalue ()      {         androidjni.attachcurrentthread();         plugintutorialactivityjavaclass = new androidjavaclass("com.test.app.mylibrary");         float number = plugintutorialactivityjavaclass.callstatic<float>("getvalue");         return number.tostring();     }      string val = "";     void ongui()     {         if(gui.button(new rect(0,0,200,200),"getvalue"))         {             val = getvalue();         }         gui.textarea(new rect(0,200,200,200),val);     } } 

did wrong? me please thanks