When I start my (soon-to-be) android game (from eclipse) it opens, but immediately force-closes.
Logcat says:
07-09 17:12:35.709: ERROR/AndroidRuntime(3866): Uncaught handler: thread main exiting due to uncaught exception
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{org.anselm.eickhoff.rhythm/org.anselm.eickhoff.rhythm.RhythmGameActivity}: java.lang.ClassNotFoundException: org.anselm.eickhoff.rhythm.RhythmGameActivity in loader dalvik.system.PathClassLoader@4001e740
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2497)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread.access$2200(ActivityThread.java:126)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.os.Handler.dispatchMessage(Handler.java:99)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.os.Looper.loop(Looper.java:123)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread.main(ActivityThread.java:4595)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at java.lang.reflect.Method.invokeNative(Native Method)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at java.lang.reflect.Method.invoke(Method.java:521)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at dalvik.system.NativeStart.main(Native Method)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): Caused by: java.lang.ClassNotFoundException: org.anselm.eickhoff.rhythm.RhythmGameActivity in loader dalvik.system.PathClassLoader@4001e740
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2489)
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): ... 11 more
the interesting line here is (I think):
07-09 17:12:35.719: ERROR/AndroidRuntime(3866): Caused by: java.lang.ClassNotFoundException: org.anselm.eickhoff.rhythm.RhythmGameActivity in loader dalvik.system.PathClassLoader@4001e740
Which surprises me, because I have this class (in the right package)
edit: to clarify, added the first line which I had omitted (together with the imports)
package org.anselm.eickhoff.rhythm;
...
public class RhythmGameActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
public void onPause() {
}
}
and that’s all it does!
I also registered it in the manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.anselm.eickhoff.rhythm"
android:versionCode="1" android:versionName="pre-alpha">
<uses-permission android:name="android.permission.INTERNET" />
<application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true" android:hasCode="false">
<activity android:name=".RhythmGameActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
edit: this all has started since I renamed the activity from RhythmGame to RhythmGameActivity, but I am pretty sure I replaced all the references so maybe it is still wrongly chached somewhere? (I tried refreshing and cleaning the project)
Your help is really appreciated – im stuck!
I use Perforce with Eclipse and have discovered that Perforce’s default behavior of making all files under source control read-only causes build problems that aren’t clearly specified in Eclipse’s build window. Also, there seems to be a quirk for me when adding a library project where even if the .classpath and .project file are writable the library may not properly associate itself with the project. I generally follow these steps for resolving errors of this nature (this assumes that the project’s manifest is correct):
1) Close Eclipse. Eclipse may cache some info about a file’s R/W status.
2) (Broad stroke) Make all of the files in the project writable either by checking them out from source control, or through the OS. .classpath and .project at the bare minimum should be writable.
2.5) If you placed files under source control that are generated during the build process and are a normal part of the Android build process then they should be removed from source control and made writable. Including but not limited to .class and files in the bin and gen directories.
3) Open the project in Eclipse. If there are no errors the problem may be fixed.
4) Examine the project explorer and look specifically for library project dependencies that may be missing. In my experience it’s important to see all lib projects’ directories and their library status icon in your project’s explorer hierarchy. If a lib project folder and icon is missing, go to Properties->Android and select and add the missing lib(s). After adding a lib select “Apply” an watch the project explorer to make sure that the lib icon appears in the project directory. This step explanation may seem overly detailed, but I’ve been bitten several times before forcing myself to be extra observant here. If a lib won’t add, try adding other dummy lib project and removing them in combination with the lib you want. No joke – this is sometimes necessary for me.
5) Clean all of the projects.
6) Read the error list and resolve any other errors.
7) Fix all of the warnings you’ve been putting off fixing.
8) (Not essential but important) Revert all unchanged files and observe what’s left in you changelist – these are the files that will need your attention in the future to prevent build problems.