You've got a crash: 08-08 12:44:31.607: E/AndroidRuntime(780): Caused by: java.lang.NullPointerException 08-08 12:44:31.607: E/AndroidRuntime(780): at org.androidsoft.games.puzzle. kids.AbstractMainActivity.onCreate(AbstractMainActivity.java:81)
Set a breakpoint in AbstractMainActivity onCreate, figure out what is null, and fix it. -- K 2012/8/8 Xtreme <[email protected]> > Want to start a standalone android project with a button in another > project. First made a simple main app with a button that was referring to > another project with Hello World with "is Library in Preferences". All > according > http://developer.android.com/tools/projects/projects-eclipse.html#SettingUpLibraryProjectand > it worked without problems. > > Did the same thing with an open soruce project (puzzle) > http://code.google.com/p/androidsoft/source/browse/#svn%2Ftrunk%2Fpuzzlebut > get an error message in LogCat and my appa crashes when I click the > button in my main app. > > Guess I may have missed something in AndroidManifest.xml According to the > documentation it says > > Declaring library components in the manifest file: You must declare any > <activity>, <service>, <receiver>, <provider>, and so on, as well as > <permission>, <uses-library>. > > I can compile puzzle as their own project without any problems. If the > puzzle is a library will not work. > > > My main app with a button that will start the second project > > public class AppActivity extends Activity { > > Button button; > > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(R.layout.main); > addListenerOnButton(); > } > > public void addListenerOnButton() { > > final Context context = this; > > button = (Button) findViewById(R.id.button1); > > button.setOnClickListener(new OnClickListener() { > > @Override > public void onClick(View arg0) { > > Intent intent = new Intent(context, > org.androidsoft.games.puzzle.kids.MainActivity.class); > startActivity(intent); > > } > > }); > > } > > } > > AndroidManifest.xml in my main app with > android:name="org.androidsoft.games.puzzle.kids.MainActivity > > <?xml version="1.0" encoding="utf-8"?> > <manifest xmlns:android="http://schemas.android.com/apk/res/android"; > package="com.mkyong.android" > android:versionCode="1" > android:versionName="1.0" > > > <uses-sdk android:minSdkVersion="10" /> > > <application > android:icon="@drawable/ic_launcher" > android:label="@string/app_name" > > <activity > android:label="@string/app_name" > android:name=".AppActivity" > > <intent-filter > > <action android:name="android.intent.action.MAIN" /> > <category android:name="android.intent.category.LAUNCHER" /> > </intent-filter> > </activity> > <activity > android:name="org.androidsoft.games.puzzle.kids.MainActivity"> > </activity> > </application> > > </manifest> > > > AndroidManifest.xml in puzzle that I want to use as a library > http://code.google.com/p/androidsoft/source/browse/trunk/puzzle/AndroidManifest.xml > > LogCat error > > > 08-08 12:44:31.607: E/AndroidRuntime(780): FATAL EXCEPTION: main > 08-08 12:44:31.607: E/AndroidRuntime(780): java.lang.RuntimeException: > Unable to start activity > ComponentInfo{com.mkyong.android/org.androidsoft.games.puzzle.kids.MainActivity}: > java.lang.NullPointerException > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread.access$600(ActivityThread.java:130) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.os.Handler.dispatchMessage(Handler.java:99) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.os.Looper.loop(Looper.java:137) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread.main(ActivityThread.java:4745) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > java.lang.reflect.Method.invokeNative(Native Method) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > java.lang.reflect.Method.invoke(Method.java:511) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > dalvik.system.NativeStart.main(Native Method) > 08-08 12:44:31.607: E/AndroidRuntime(780): Caused by: > java.lang.NullPointerException > 08-08 12:44:31.607: E/AndroidRuntime(780): at > org.androidsoft.games.puzzle.kids.AbstractMainActivity.onCreate(AbstractMainActivity.java:81) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > org.androidsoft.games.puzzle.kids.MainActivity.onCreate(MainActivity.java:57) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.Activity.performCreate(Activity.java:5008) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) > 08-08 12:44:31.607: E/AndroidRuntime(780): at > android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) > 08-08 12:44:31.607: E/AndroidRuntime(780): ... 11 more > > > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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