神祕Android和notifyDataSetChanged（）

Question

我的代碼

public void deleteItem(int position) { 
    this.rep.open(); 
    this.rep.deleteEntry(this.adapter.getObject(position)); 
    this.adapter.deleteObjectFromList(position); 
    this.rep.close(); 
    this.adapter.notifyDataSetChanged(); 
} 

@Override 
public boolean onContextItemSelected(MenuItem item) { 
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); 
    switch (item.getItemId()) { 
     case R.id.update: 
      callUpdateForm(adapter.getObject(info.position)); 
      this.rep.open(); 
      this.adapter.swapItems(this.rep.getAllEntries()); 
      this.rep.close(); 
      *** HERE *** 
      return true; 
     case R.id.delete: 
      deleteItem(info.position); 
      return true; 
     default: 
      return super.onContextItemSelected(item); 
    } 
} 

如果我把this.adapter.notifyDataSetChanged();（在*這裏*上面指出）我的應用程序崩潰，當我按下刪除上下文菜單上，如果沒有它，它的工作原理精細。但是當我更新一個條目時，它不會注意到這個改變......那麼爲什麼當我按刪除時這段代碼會相互作用呢？以及如何使這項工作？

編輯

我要指出的是ListView控件刷新其自上更新我需要做的是在onResume()事件

所以現在我的代碼：

public void deleteItem(int position) { 
    this.rep.open(); 
    this.rep.deleteEntry(this.adapter.getObject(position)); 
    this.adapter.deleteObjectFromList(position); 
    this.rep.close(); 
    this.adapter.notifyDataSetChanged(); 
} 
@Override 
public boolean onContextItemSelected(MenuItem item) { 
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); 
    switch (item.getItemId()) { 
     case R.id.update: 
      callUpdateForm(adapter.getObject(info.position)); 
      return true; 
     case R.id.delete: 
      deleteItem(info.position); 
      return true; 
     default: 
      return super.onContextItemSelected(item); 
    } 
} 

@Override 
public void onResume() { 
    super.onResume(); 
    this.rep.open(); 
    this.adapter.swapItems(this.rep.getAllEntries()); 
    this.adapter.notifyDataSetChanged(); 
    this.rep.close(); 
} 

現在更新，但刪除我得到我的應用程序再次崩潰...當我從deleteItem刪除this.adapter.notifyDataSetChanged();部分功能它不會崩潰，但它不刷新我的列表視圖...

原木之前CRASH：

08-02 06:13:47.566: INFO/System.out(5788): Comment deleted with id: 10 
08-02 06:13:47.906: DEBUG/AndroidRuntime(5788): Shutting down VM 
08-02 06:13:47.906: WARN/dalvikvm(5788): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
08-02 06:13:47.916: ERROR/AndroidRuntime(5788): FATAL EXCEPTION: main 
    java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 
    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257) 
    at java.util.ArrayList.get(ArrayList.java:311) 
    at com.example.NutritionSeeker.Adapters.EntryAdapter.getView(EntryAdapter.java:65) 
    at android.widget.AbsListView.obtainView(AbsListView.java:1294) 
    at android.widget.ListView.measureHeightOfChildren(ListView.java:1198) 
    at android.widget.ListView.onMeasure(ListView.java:1109) 
    at android.view.View.measure(View.java:8171) 
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132) 
    at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012) 
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:381) 
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:304) 
    at android.view.View.measure(View.java:8171) 
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132) 
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 
    at android.view.View.measure(View.java:8171) 
    at android.widget.LinearLayout.measureVertical(LinearLayout.java:526) 
    at android.widget.LinearLayout.onMeasure(LinearLayout.java:304) 
    at android.view.View.measure(View.java:8171) 
    at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3132) 
    at android.widget.FrameLayout.onMeasure(FrameLayout.java:245) 
    at android.view.View.measure(View.java:8171) 
    at android.view.ViewRoot.performTraversals(ViewRoot.java:801) 
    at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    at android.os.Looper.loop(Looper.java:123) 
    at android.app.ActivityThread.main(ActivityThread.java:4627) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:521) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
    at dalvik.system.NativeStart.main(Native Method) 

08-02 06：13：47.926：WARN/ActivityManager（112）：強制結束 活性com.example.NutritionSeeker/.HistoryActivity 08-02 06： 13：48.488：WARN/ActivityManager（112）：用於 HistoryRecord {44f54130 com.example.NutritionSeeker/.HistoryActivity}活動暫停超時

Answer 1

我不知道是什麼rep.getAllEntries，但你應該使用一個AsyncTaskLoader http://developer.android.com/reference/android/content/AsyncTaskLoader.html和一個適配器連接到。如果您可以提供幫助，請創建一個ContentProvider作爲您的存儲庫，並使用CursorLoader代替http://developer.android.com/reference/android/content/CursorLoader.html。