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POCalling another function from another class within the same main class in Android
 

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    <p>I have a main Class i.e</p> <pre><code>Class A extends BroadcastReceiver { ClassB hello = new ClassB Public void onReceive(){ // Value obtained from Method in Class B String Message = hello.2ndFunction() } Class B extends Activity{ public String 2ndFunction(){ // 2ndFunction Lines...... } } } </code></pre> <p>This is my scenario. But i get the error</p> <pre><code> 06-20 09:17:02.584: E/AndroidRuntime(1076): FATAL EXCEPTION: main 06-20 09:17:02.584: E/AndroidRuntime(1076): java.lang.RuntimeException: Unable to start receiver com.example.timesheetcalculator.ReceiveSMS: java.lang.NullPointerException 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2383) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.app.ActivityThread.access$1500(ActivityThread.java:141) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1310) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.os.Handler.dispatchMessage(Handler.java:99) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.os.Looper.loop(Looper.java:137) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.app.ActivityThread.main(ActivityThread.java:5041) 06-20 09:17:02.584: E/AndroidRuntime(1076): at java.lang.reflect.Method.invokeNative(Native Method) 06-20 09:17:02.584: E/AndroidRuntime(1076): at java.lang.reflect.Method.invoke(Method.java:511) 06-20 09:17:02.584: E/AndroidRuntime(1076): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 06-20 09:17:02.584: E/AndroidRuntime(1076): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 06-20 09:17:02.584: E/AndroidRuntime(1076): at dalvik.system.NativeStart.main(Native Method) 06-20 09:17:02.584: E/AndroidRuntime(1076): Caused by: java.lang.NullPointerException 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.content.ContextWrapper.getContentResolver(ContextWrapper.java:99) 06-20 09:17:02.584: E/AndroidRuntime(1076): at com.example.timesheetcalculator.ReceiveSMS$CallLogsExtracter.CallLogs(ReceiveSMS.java:75) 06-20 09:17:02.584: E/AndroidRuntime(1076): at com.example.timesheetcalculator.ReceiveSMS.onReceive(ReceiveSMS.java:47) 06-20 09:17:02.584: E/AndroidRuntime(1076): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2376) </code></pre> <p>What could be the problem ?</p>
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    1. USVinod K
    1. USVinod K
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      1. POCalling another function from another class within the same main class in Android
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    1. COFirst of all your error log excerpt is too short, show the full error message with stacktrace, second, creating an activity object yourself is generally a bad idea
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      1. USMichael Butscher
    2. COtry like this "ClassB hello = ClassB.getInstance(this);"
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      1. USASP
    3. COMaybe try defining he method as: `@Override public abstract void onReceive (Context context, Intent intent)` ?
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      1. USg00dy
 

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