Error at setting up a larger library project Android

xtreme · by **xtreme** » Wed Aug 08, 2012 5:25 pm

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/proj ... aryProject and it worked without problems.

Did the same thing with an open soruce project (puzzle) http://code.google.com/p/androidsoft/so ... k%2Fpuzzle but 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

Code: Select all: 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

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Using java Syntax Highlighting

   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);   
    
                        }
    
                });
    
        }
    
    }
 
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AndroidManifest.xml in my main app with android:name="org.androidsoft.games.puzzle.kids.MainActivity

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Using xml Syntax Highlighting

    <?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>
 
 
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AndroidManifest.xml in puzzle that I want to use as a library http://code.google.com/p/androidsoft/so ... nifest.xml

LogCat error

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Using xml Syntax Highlighting

 
    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
 
 
 
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Error at setting up a larger library project Android

Error at setting up a larger library project Android

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