Ok I made som new progress. (Btw, I keep writing this post so that others may see what I did wrong and how I fixed it)
I figured out my last issue, and fixed it simply by installing the Android SDK 2.3.1 package(obviosly I had forgotten to do so earlier).
I tried to debug the application in an emulator, but it crashed "unexpectedly".
I retrieved the log.txt from Eclipse, and this is what I got:
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02-11 16:40:03.081: D/AndroidRuntime(411): Shutting down VM
02-11 16:40:03.081: W/dalvikvm(411): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-11 16:40:03.101: E/AndroidRuntime(411): FATAL EXCEPTION: main
02-11 16:40:03.101: E/AndroidRuntime(411): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.thegamecreators.agk_player/android.app.NativeActivity}: java.lang.IllegalArgumentException: Unable to find native library: android_player
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1622)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.os.Handler.dispatchMessage(Handler.java:99)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.os.Looper.loop(Looper.java:123)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread.main(ActivityThread.java:3647)
02-11 16:40:03.101: E/AndroidRuntime(411): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 16:40:03.101: E/AndroidRuntime(411): at java.lang.reflect.Method.invoke(Method.java:507)
02-11 16:40:03.101: E/AndroidRuntime(411): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-11 16:40:03.101: E/AndroidRuntime(411): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-11 16:40:03.101: E/AndroidRuntime(411): at dalvik.system.NativeStart.main(Native Method)
02-11 16:40:03.101: E/AndroidRuntime(411): Caused by: java.lang.IllegalArgumentException: Unable to find native library: android_player
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.NativeActivity.onCreate(NativeActivity.java:187)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-11 16:40:03.101: E/AndroidRuntime(411): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1586)
02-11 16:40:03.101: E/AndroidRuntime(411): ... 11 more
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I dont have a signature...