Are you not using Eclipse and ADT? If not, you should. Eclipse should automatically switch to the debugger view when you start an app in debug mode (right click your project and Debug As > Android Application). >From there use the Windows>View>Breakpoint and using the "!" icon set a breakpoint on the java.lang.NullPointerException. Eclipse will then show you the exact line of code where the exception occurs.
HTH R/ On Tue, Sep 15, 2009 at 8:29 PM, Johnnyr <jreyn...@gmail.com> wrote: > > Nevermind! I figured out what was causing my crash. I forgot to > declare the scrollview: > > scrollview=(ScrollView)findViewById(R.id.scrollview); > > it would be nice if I knew how to use the debugger =( > > On Sep 15, 5:34 pm, Johnnyr <jreyn...@gmail.com> wrote: >> Thank you for the reply. Unfortunatley, that code seems to throw an >> error. >> >> scrollview.scrollTo(0, outputBox.getHeight()); >> >> scrollview is my scrollbox, outputBox is my textview. >> >> From the debugger, it looks like: >> >> Thread exiting due to uncaught exception >> java.lang.NullpointerException >> >> Any ideas? >> >> This is my xml for my layout: >> >> <?xml version="1.0" encoding="utf-8"?> >> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/ >> android" >> android:orientation="vertical" >> android:layout_width="fill_parent" >> android:layout_height="fill_parent" >> > >> <ScrollView >> android:id="@+id/scrollview" >> android:layout_width="wrap_content" >> android:layout_height="200px" >> >> <TextView >> android:id="@+id/output" >> android:layout_height="wrap_content" >> android:layout_width="wrap_content" >> android:textStyle="bold" >> android:layout_marginLeft="10px" >> android:text="This is a test Sentence." >> android:layout_marginBottom="0px" >> android:layout_gravity="left" >> /> >> </ScrollView> >> </RelativeLayout> >> >> Thanks! >> >> On Sep 15, 4:55 pm, Raphael <r...@android.com> wrote: >> >> >> >> > someTextView.setText(someText); >> > scrollViewWrappingTheTextView.scrollTo(0, someTextView.getHeight()); >> >> > R/ >> >> > On Tue, Sep 15, 2009 at 4:35 PM, Johnnyr <jreyn...@gmail.com> wrote: >> >> > > Hi guys, >> >> > > I'm trying to get a text view, that is a child of a scrollview, to >> > > automatically scroll to the bottom when something new is appended to >> > > it. Right now I'm at a loss as to how to do this. >> >> > > Any ideas? > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
