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PONullPointer exception and FileInputStream
 

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  1. PONullPointer exception and FileInputStream
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    <p>I have a NPE when I execute the line <code>FileInputStream ifs=openFileInput(fileName);</code> I get a NPE. I get the same NPE when I execute </p> <p><code>FileInputStream ifs=getApplicationContext().openFileInput(fileName);</code></p> <p>The full stacktrace is here.</p> <pre><code>07-25 22:00:35.852 25063-25063/? E/AndroidRuntime: FATAL EXCEPTION: main java.lang.NullPointerException at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:109) at com.ollien.flashcarder.MainActivity.setPagerFile(MainActivity.java:353) at com.ollien.flashcarder.SetsFragment$1.onItemClick(SetsFragment.java:47) at android.widget.AdapterView.performItemClick(AdapterView.java:298) at android.widget.AbsListView.performItemClick(AbsListView.java:1215) at android.widget.ListView.performItemClick(ListView.java:4506) at android.widget.AbsListView$PerformClick.run(AbsListView.java:2959) at android.widget.AbsListView$1.run(AbsListView.java:3645) at android.os.Handler.handleCallback(Handler.java:725) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:5751) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1083) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:850) at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Could someone help? I don't quite know why this is happening. fileName is not null, and is equal to <code>"hi there.txt"</code>Thanks!</p>
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    1. USneo108
    1. USollien
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    1. COCan you check to see if getApplicationContext() returns null? Just with a log. If you are sure filename isn't null
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      1. USNicholas
    2. COAre you ever calling `attachBaseContext()` in `onItemClick` or `setPagerFile` by chance? I ask because both `getApplicationContext()` and `openFileInput()` have a call to mBaseContext.SOMETHING, so if you're setting that to null then that would explain the NPE.
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      1. USJonathan
    3. CO@Nicholas getApplicationContext(); throws a NPE when I try to System.out it
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      1. USollien
 

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