I have two methods, one reads files and one writes the given string to
a file.
For some reason, the first time the write method works fine, but after
it writes the first file, any files after that makes it throw a
nullpointerexception. No idea why. The problem is in the writeData
method for sure.... why is it throwing null???
Stack dump:
08-10 23:04:43.309: WARN/dalvikvm(687): threadid=17: thread exiting
with uncaught exception (group=0x4000fe70)
08-10 23:04:43.319: ERROR/AndroidRuntime(687): Uncaught handler:
thread IntentService[TheDaemon] exiting due to uncaught exception
08-10 23:04:43.357: ERROR/AndroidRuntime(687):
java.lang.NullPointerException
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
org.myApp.ThePreferences.writeData(ThePreferences.java:39)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
org.myApp.ThePhone.savePhoneToDisk(ThePhone.java:33)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
org.myApp.ThePhone.refreshStatus(ThePhone.java:82)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
org.myApp.TheDaemon.onHandleIntent(TheDaemon.java:62)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
android.app.IntentService$ServiceHandler.handleMessage
(IntentService.java:29)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
android.os.Handler.dispatchMessage(Handler.java:99)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
android.os.Looper.loop(Looper.java:123)
08-10 23:04:43.357: ERROR/AndroidRuntime(687): at
android.os.HandlerThread.run(HandlerThread.java:60)
write Method
public boolean writeData(String filename, String contents)
{
try {
FileOutputStream fOut = context.openFileOutput(filename,
Context.MODE_PRIVATE);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.write(contents);
osw.flush();
osw.close();
} catch (IOException e) {
e.printStackTrace();
Log.e("fmi", "fmi throws ioexception in WRITER");
return false;
} catch (java.lang.NullPointerException e) {
e.printStackTrace();
}
return true;
}
Any idea why it's throwing a null pointer exception?
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