I get this error on Android 2.2:
W/dalvikvm(15104): Exception Ljava/lang/UnsatisfiedLinkError; thrown during Lorg/eehouse/android/xw4/jni/XwJNI;.<clinit>
W/dalvikvm(15104): threadid=1: thread exiting with uncaught exception (group=0x40020ac0)
E/AndroidRuntime(15104): FATAL EXCEPTION: main
E/AndroidRuntime(15104): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.eehouse.android.xw4/org.eehouse.android.xw4.GamesList}: android.view.InflateException: Binary XML file line #45: Error inflating class java.lang.reflect.Constructor
E/AndroidRuntime(15104): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
E/AndroidRuntime(15104): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime(15104): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime(15104): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime(15104): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(15104): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(15104): at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(15104): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(15104): at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(15104): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(15104): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(15104): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(15104): Caused by: android.view.InflateException: Binary XML file line #45: Error inflating class java.lang.reflect.Constructor
E/AndroidRuntime(15104): at android.preference.GenericInflater.createItem(GenericInflater.java:397)
E/AndroidRuntime(15104): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:430)
E/AndroidRuntime(15104): at android.preference.GenericInflater.rInflate(GenericInflater.java:481)
E/AndroidRuntime(15104): at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
E/AndroidRuntime(15104): at android.preference.GenericInflater.rInflate(GenericInflater.java:493)
E/AndroidRuntime(15104): at android.preference.GenericInflater.inflate(GenericInflater.java:326)
E/AndroidRuntime(15104): at android.preference.GenericInflater.inflate(GenericInflater.java:263)
E/AndroidRuntime(15104): at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:251)
E/AndroidRuntime(15104): at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:444)
E/AndroidRuntime(15104): at android.preference.PreferenceManager.setDefaultValues(PreferenceManager.java:422)
E/AndroidRuntime(15104): at org.eehouse.android.xw4.GamesList.onCreate(GamesList.java:255)
E/AndroidRuntime(15104): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime(15104): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
E/AndroidRuntime(15104): ... 11 more
E/AndroidRuntime(15104): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime(15104): at org.eehouse.android.xw4.DictListPreference.<init>(DictListPreference.java:38)
E/AndroidRuntime(15104): at java.lang.reflect.Constructor.constructNative(Native Method)
E/AndroidRuntime(15104): at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
E/AndroidRuntime(15104): at android.preference.GenericInflater.createItem(GenericInflater.java:383)
E/AndroidRuntime(15104): ... 23 more
E/AndroidRuntime(15104): Caused by: java.lang.ExceptionInInitializerError
E/AndroidRuntime(15104): at org.eehouse.android.xw4.DictLangCache.getInfo(DictLangCache.java:321)
E/AndroidRuntime(15104): at org.eehouse.android.xw4.DictLangCache.annotatedDictName(DictLangCache.java:64)
E/AndroidRuntime(15104): ... 27 more
E/AndroidRuntime(15104): Caused by: java.lang.UnsatisfiedLinkError: Library xwjni not found
E/AndroidRuntime(15104): at java.lang.Runtime.loadLibrary(Runtime.java:461)
E/AndroidRuntime(15104): at java.lang.System.loadLibrary(System.java:557)
E/AndroidRuntime(15104): at org.eehouse.android.xw4.jni.XwJNI.<clinit>(XwJNI.java:32)
E/AndroidRuntime(15104): ... 29 more
W/ActivityManager( 1386): Force finishing activity org.eehouse.android.xw4/.GamesList