android - Error trying to change password hint font -


i'm trying follow advice post:

but when run code, program crashes. here code:

@override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      /* change font password hint match of      * user name field */     edittext pw = (edittext) findviewbyid(r.id.password);     pw.settypeface(typeface.default);    //<---crashes on line     pw.settransformationmethod(new passwordtransformationmethod());      setcontentview(r.layout.activity_main); }

here xml object:

<edittext     android:id="@+id/password"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignleft="@+id/username"     android:layout_alignright="@+id/appname"     android:layout_below="@+id/username"     android:layout_margintop="14dp"     android:ems="10"     android:hint="@string/password"     android:inputtype="textpassword" />

and finally, here logcat output can see error:

05-09 00:30:21.408: e/trace(16987): error opening trace file: no such file or directory (2) 05-09 00:30:21.918: d/androidruntime(16987): shutting down vm 05-09 00:30:21.918: w/dalvikvm(16987): threadid=1: thread exiting uncaught exception (group=0x40a71930) 05-09 00:30:21.978: e/androidruntime(16987): fatal exception: main 05-09 00:30:21.978: e/androidruntime(16987): java.lang.runtimeexception: unable start activity componentinfo{com.mobilenicity.gen_co_event_marketing_app/com.mobilenicity.gen_co_event_marketing_app.mainactivity}: java.lang.nullpointerexception 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread.performlaunchactivity(activitythread.java:2180) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread.handlelaunchactivity(activitythread.java:2230) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread.access$600(activitythread.java:141) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread$h.handlemessage(activitythread.java:1234) 05-09 00:30:21.978: e/androidruntime(16987): @ android.os.handler.dispatchmessage(handler.java:99) 05-09 00:30:21.978: e/androidruntime(16987): @ android.os.looper.loop(looper.java:137) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread.main(activitythread.java:5041) 05-09 00:30:21.978: e/androidruntime(16987): @ java.lang.reflect.method.invokenative(native method) 05-09 00:30:21.978: e/androidruntime(16987): @ java.lang.reflect.method.invoke(method.java:511) 05-09 00:30:21.978: e/androidruntime(16987): @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:793) 05-09 00:30:21.978: e/androidruntime(16987): @ com.android.internal.os.zygoteinit.main(zygoteinit.java:560) 05-09 00:30:21.978: e/androidruntime(16987): @ dalvik.system.nativestart.main(native method) 05-09 00:30:21.978: e/androidruntime(16987): caused by: java.lang.nullpointerexception 05-09 00:30:21.978: e/androidruntime(16987): @ com.mobilenicity.gen_co_event_marketing_app.mainactivity.oncreate(mainactivity.java:26) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activity.performcreate(activity.java:5104) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1080) 05-09 00:30:21.978: e/androidruntime(16987): @ android.app.activitythread.performlaunchactivity(activitythread.java:2144) 05-09 00:30:21.978: e/androidruntime(16987): ... 11 more

can't figure out going wrong. can see it? thanks!

change call of setcontentview(r.layout.activity_main);

call just after super.oncreate(savedinstancestate);

when you're doing edittext pw = (edittext) findviewbyid(r.id.password);, findviewbyid "can't retrieve" edittext have defined in layout (because call setcontentview after) findviewbyid returns null , when you're doing pw.settypeface(typeface.default); throws npe because pw null.


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