android - FragmentActivity blows up with a simple xml file -

i have simple layout file looks this:

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >      <!-- put map fragment here -->     <fragment           android:id="@+id/map"           android:layout_width="match_parent"           android:layout_height="match_parent"           class="com.google.android.gms.maps.supportmapfragment">      </fragment>  </linearlayout> 

then, have class extends fragmentactivity begins this:

protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_map_view); 

when hits setcontentview, runtime exception. can't figure out why.

added:

well, i'm not including rest of oncreate, because never reaches it. relevant parts of logcat seem be:

05-09 22:31:35.604: e/dalvikvm(922): not find class 'com.google.android.gms.maps.model.markeroptions', referenced method com.molavi.homeworkfive.localmap.setupmap 05-09 22:31:35.604: w/dalvikvm(922): vfy: unable resolve new-instance 470 (lcom/google/android/gms/maps/model/markeroptions;) in lcom/molavi/homeworkfive/localmap; 05-09 22:31:35.635: d/dalvikvm(922): vfy: replacing opcode 0x22 @ 0x0002 05-09 22:31:35.744: e/dalvikvm(922): not find class 'com.google.android.gms.maps.mapview', referenced method com.molavi.homeworkfive.localmap.setupmapifneeded 05-09 22:31:35.744: w/dalvikvm(922): vfy: unable resolve check-cast 466 (lcom/google/android/gms/maps/mapview;) in lcom/molavi/homeworkfive/localmap; 05-09 22:31:35.744: d/dalvikvm(922): vfy: replacing opcode 0x1f @ 0x000b 05-09 22:31:35.754: e/dalvikvm(922): not find class 'com.google.android.gms.maps.supportmapfragment', referenced method com.molavi.homeworkfive.localmap.oncreate 05-09 22:31:35.764: w/dalvikvm(922): vfy: unable resolve check-cast 467 (lcom/google/android/gms/maps/supportmapfragment;) in lcom/molavi/homeworkfive/localmap; 05-09 22:31:35.784: d/dalvikvm(922): vfy: replacing opcode 0x1f @ 0x003f 05-09 22:31:35.814: i/dalvikvm(922): not find method com.google.android.gms.maps.supportmapfragment.ondestroy, referenced method com.molavi.homeworkfive.localmap.ondestroy 05-09 22:31:35.814: w/dalvikvm(922): vfy: unable resolve virtual method 3401: lcom/google/android/gms/maps/supportmapfragment;.ondestroy ()v 05-09 22:31:35.814: d/dalvikvm(922): vfy: replacing opcode 0x6e @ 0x0002 05-09 22:31:35.856: i/dalvikvm(922): not find method com.google.android.gms.maps.supportmapfragment.onlowmemory, referenced method com.molavi.homeworkfive.localmap.onlowmemory 05-09 22:31:35.864: w/dalvikvm(922): vfy: unable resolve virtual method 3402: lcom/google/android/gms/maps/supportmapfragment;.onlowmemory ()v 05-09 22:31:35.864: d/dalvikvm(922): vfy: replacing opcode 0x6e @ 0x0005 05-09 22:31:35.904: i/dalvikvm(922): not find method com.google.android.gms.maps.supportmapfragment.onpause, referenced method com.molavi.homeworkfive.localmap.onpause 05-09 22:31:35.904: w/dalvikvm(922): vfy: unable resolve virtual method 3403: lcom/google/android/gms/maps/supportmapfragment;.onpause ()v 05-09 22:31:35.934: d/dalvikvm(922): vfy: replacing opcode 0x6e @ 0x0002 05-09 22:31:35.944: i/dalvikvm(922): not find method com.google.android.gms.maps.supportmapfragment.onresume, referenced method com.molavi.homeworkfive.localmap.onresume 05-09 22:31:35.964: w/dalvikvm(922): vfy: unable resolve virtual method 3404: lcom/google/android/gms/maps/supportmapfragment;.onresume ()v 05-09 22:31:35.964: d/dalvikvm(922): vfy: replacing opcode 0x6e @ 0x0005 05-09 22:31:35.984: i/dalvikvm(922): not find method com.google.android.gms.maps.supportmapfragment.onsaveinstancestate, referenced method com.molavi.homeworkfive.localmap.onsaveinstancestate 05-09 22:31:35.984: w/dalvikvm(922): vfy: unable resolve virtual method 3405: lcom/google/android/gms/maps/supportmapfragment;.onsaveinstancestate (landroid/os/bundle;)v 05-09 22:31:36.014: d/dalvikvm(922): vfy: replacing opcode 0x6e @ 0x0005 05-09 22:31:36.024: d/dalvikvm(922): dexopt: unable opt direct call 0x0d4f @ 0x04 in lcom/molavi/homeworkfive/localmap;.setupmap 05-09 22:31:36.044: d/dalvikvm(922): dexopt: unable opt direct call 0x0d4e @ 0x15 in lcom/molavi/homeworkfive/localmap;.setupmap 05-09 22:31:37.464: e/throttleservice(287): problem during onpollalarm: java.lang.illegalstateexception: problem parsing stats: java.io.filenotfoundexception: /proc/net/xt_qtaguid/iface_stat_all: open failed: enoent (no such file or directory)

but don't because seems saying can't find methods on mapfragment, mapfragment has methods.