I am working on creating my own Android JAR file, this JAR will contain Activities which I need to call however I keep getting a NoClassDefFound error. It is only an issue with Activities contained in the JAR, any other objects called from the external JAR work fine.
Below are the steps I have taken when creating this JAR
I created a new library project called LibraryTest, and placed one Activity in it called LibraryActivity, which has a basic layout called librarymain.xml with some random text.
I have marked this project as a library, retrieved the JAR from the bin folder, I then created new project called TestAddLibrary. I added the JAR file to the lib folder, I then added the librarymain.xml from the LibraryTest project to the layout folder of the TestAddLibrary project.
I then added the the LibraryActivity to the manifest of the new project. Manifest looks like this
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testaddlibrary"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="10" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.testaddlibrary.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.librarytest.LibraryActivity"
>
</activity>
</application>
</manifest>
Then in the main activity of the new project, I have this
package com.example.testaddlibrary;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.example.librarytest.LibraryActivity;
public class MainActivity extends Activity
{
Button but;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
but = (Button) findViewById(R.id.butNext);
but.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v)
{
Intent i = new Intent(MainActivity.this, LibraryActivity.class);
startActivity(i);
}
});
}
}
When I click the button to launch the LibraryActivity which is stored in the JAR file, I get this error
07-10 09:20:24.798: E/AndroidRuntime(28195): FATAL EXCEPTION: main
07-10 09:20:24.798: E/AndroidRuntime(28195): java.lang.NoClassDefFoundError: com.example.librarytest.R$layout 07-10
09:20:24.798: E/AndroidRuntime(28195): at com.example.librarytest.LibraryActivity.onCreate(LibraryActivity.java:20)
07-10 09:20:24.798: E/AndroidRuntime(28195): at android.app.Activity.performCreate(Activity.java:5104) 07-10
09:20:24.798: E/AndroidRuntime(28195): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-10 09:20:24.798: E/AndroidRuntime(28195): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-10 09:20:24.798: E/AndroidRuntime(28195): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-10 09:20:24.798: E/AndroidRuntime(28195): at android.app.ActivityThread.access$600(ActivityThread.java:141) 07-10
09:20:24.798: E/AndroidRuntime(28195): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-10 09:20:24.798: E/AndroidRuntime(28195): at android.os.Handler.dispatchMessage(Handler.java:99) 07-10
09:20:24.798: E/AndroidRuntime(28195): at android.os.Looper.loop(Looper.java:137) 07-10 09:20:24.798:
E/AndroidRuntime(28195): at android.app.ActivityThread.main(ActivityThread.java:5041) 07-10
09:20:24.798: E/AndroidRuntime(28195): at java.lang.reflect.Method.invokeNative(Native Method) 07-10
09:20:24.798: E/AndroidRuntime(28195): at java.lang.reflect.Method.invoke(Method.java:511) 07-10 09:20:24.798:
E/AndroidRuntime(28195): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-10 09:20:24.798: E/AndroidRuntime(28195): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 07-10
09:20:24.798: E/AndroidRuntime(28195): at dalvik.system.NativeStart.main(Native Method)
I have read several questions on StackOverflow regarding this issue but nothing I have read has helped. I have the latest version of ADT Eclipse plugin, I have made sure that under Order and Export, I have ticked Android dependencies and Private Libraries.
Anyone have any idea what is causing this issue? Any help would be much appreciated!!
Edit: Forgot to mention other reason I am doing this is that I require my code to be hidden so I can share this out to other people without them seeing my code
