java Android片段在启动时崩溃
当我试图将action bar sherlock集成到我现有的项目中时，它一开始就崩溃了。 然而，actionbar和我的项目在编译之前都在工作
这是我的片段代码：
public class SalesOrder extends SherlockFragment{
ListView myInfoList;
String[] items = {"Item 1", "Item 2"};
ArrayAdapter<CharSequence> adapter;
ArrayList<MessageDetails> details;
AdapterView.AdapterContextMenuInfo info;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
refreshListView();
return inflater.inflate(R.layout.sales_order, container, false);
}
private void refreshListView()
{
myInfoList = (ListView)getActivity().findViewById(R.id.MessageList);
adapter = new ArrayAdapter<CharSequence>(getActivity().getApplicationContext(), 安卓.R.layout.simple_list_item_1, items);
myInfoList.setAdapter(adapter);
details = new ArrayList<MessageDetails>();
MessageDetails Detail;
//CHANGE THIS PART TO RETRIEVE DATABASE ITEM DYNAMICALLY
List<String> itemName = new ArrayList<String>();
itemName.add("Shirt Design 1");
itemName.add("Shirt Design 2");
itemName.add("Shirt Design 3");
List<Float> itemPrice = new ArrayList<Float>();
itemPrice.add(14f);
itemPrice.add(15f);
itemPrice.add(16f);
List<String> description = new ArrayList<String>();
description.add("This is a fine shirt 1");
description.add("This is a fine shirt 2");
description.add("This is a fine shirt 3");
Detail = new MessageDetails();
for (int i =0; i < itemName.size(); i++)
{
Detail = new MessageDetails();
Detail.setSub(itemName.get(i));
Detail.setSubValue(itemPrice.get(i));
Detail.setDescription(description.get(i));
details.add(Detail);
}
myInfoList.setAdapter(new CustomAdapter(details , getActivity().getApplicationContext()));
myInfoList.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
//System.out.println("Name: "+details.get(position).getSub());
String s = details.get(position).getDescription();
}
});
}
public class CustomAdapter extends BaseAdapter {
private ArrayList<MessageDetails> _data;
Context _c;
CustomAdapter (ArrayList<MessageDetails> data, Context c){
_data = data;
_c = c;
}
public int getCount() {
// TODO Auto-generated method stub
return _data.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return _data.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = convertView;
if (v == null)
{
LayoutInflater vi = (LayoutInflater)_c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.mysaleslistview, null);
}
TextView subView = (TextView)v.findViewById(R.id.itemName);
TextView subValueView = (TextView)v.findViewById(R.id.itemPrice);
MessageDetails msg = _data.get(position);
subView.setText(msg.sub);
subValueView.setText(msg.subValue.toString());
return v;
}
}
public class MessageDetails {
String sub, description;
Float subValue;
public String getSub() {
return sub;
}
public void setSub(String sub) {
this.sub = sub;
}
public Float getSubValue() {
return subValue;
}
public void setSubValue(Float subValue) {
this.subValue = subValue;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
}
还有我的日志：
07-04 21:46:56.264: E/Trace(6016): error opening trace file: No such file or directory (2)
07-04 21:46:56.318: I/ActionBarSherlock(6016): Registering ActionBarSherlockCompat with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=7, dpi=-1)
07-04 21:46:56.318: I/ActionBarSherlock(6016): Registering ActionBarSherlockNative with qualifier @com.actionbarsherlock.ActionBarSherlock$Implementation(api=14, dpi=-1)
07-04 21:46:56.318: I/ActionBarSherlock(6016): Using implementation: ActionBarSherlockNative
07-04 21:46:56.318: D/ActionBarSherlock(6016): [<ctor>] activity: com.example.isellcrazyitem.ISellCrazyItem@41323460, flags: 1
07-04 21:46:56.318: D/ActionBarSherlock(6016): [setContentView] view: 安卓.support.v4.view.ViewPager{41326568 VFED.... ......I. 0,0-0,0 #7f040032 app:id/pager}
07-04 21:46:56.318: D/ActionBarSherlock(6016): [setContentView] view: 安卓.support.v4.view.ViewPager{41326568 VFED.... ......I. 0,0-0,0 #7f040032 app:id/pager}, params: 安卓.view.ViewGroup$LayoutParams@4137b8f0
07-04 21:46:56.389: D/ActionBarSherlock(6016): [getActionBar]
07-04 21:46:56.389: D/ActionBarSherlock(6016): [getActionBar]
07-04 21:46:56.404: V/21st Polling:(6016): clicked
07-04 21:46:56.443: D/AndroidRuntime(6016): Shutting down VM
07-04 21:46:56.443: W/dalvikvm(6016): threadid=1: thread exiting with uncaught exception (group=0x41080930)
07-04 21:46:56.443: E/AndroidRuntime(6016): FATAL EXCEPTION: main
07-04 21:46:56.443: E/AndroidRuntime(6016): java.lang.NullPointerException
07-04 21:46:56.443: E/AndroidRuntime(6016): at com.example.isellcrazyitem.SalesOrder.refreshListView(SalesOrder.java:38)
07-04 21:46:56.443: E/AndroidRuntime(6016): at com.example.isellcrazyitem.SalesOrder.onCreateView(SalesOrder.java:29)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:870)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1080)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.BackStackRecord.run(BackStackRecord.java:622)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1416)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:139)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.view.ViewPager.populate(ViewPager.java:804)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.support.v4.view.ViewPager.onMeasure(ViewPager.java:1016)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.View.measure(View.java:15523)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4825)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:310)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.View.measure(View.java:15523)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.widget.LinearLayout.measureVertical(LinearLayout.java:847)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.widget.LinearLayout.onMeasure(LinearLayout.java:588)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.View.measure(View.java:15523)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4825)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.widget.FrameLayout.onMeasure(FrameLayout.java:310)
07-04 21:46:56.443: E/AndroidRuntime(6016): at com.安卓.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2434)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.View.measure(View.java:15523)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1874)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1089)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1265)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.Choreographer.doCallbacks(Choreographer.java:562)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.Choreographer.doFrame(Choreographer.java:532)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.os.Handler.handleCallback(Handler.java:725)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.os.Handler.dispatchMessage(Handler.java:92)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.os.Looper.loop(Looper.java:137)
07-04 21:46:56.443: E/AndroidRuntime(6016): at 安卓.app.ActivityThread.main(ActivityThread.java:5233)
07-04 21:46:56.443: E/AndroidRuntime(6016): at java.lang.reflect.Method.invokeNative(Native Method)
07-04 21:46:56.443: E/AndroidRuntime(6016): at java.lang.reflect.Method.invoke(Method.java:511)
07-04 21:46:56.443: E/AndroidRuntime(6016): at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799)
07-04 21:46:56.443: E/AndroidRuntime(6016): at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:566)
07-04 21:46:56.443: E/AndroidRuntime(6016): at dalvik.system.NativeStart.main(Native Method)
07-04 21:47:07.107: I/Process(6016): Sending signal. PID: 6016 SIG: 9
# 1 楼答案
将refreshListView（）代码移动到onActivityCreated，即可正常工作