此代码在我获得事件列表的范围内有效。选择一个并转到详细信息，我可以更新等，然后返回我的列表。第一项成为“添加”按钮，第二项成为“退出”功能。但我想要真正的按钮。
我添加了真实按钮，经过尝试，用于处理真实按钮的代码要么有错误，要么只是崩溃。我的最新是直接从这个站点复制的：
如何在 Fragments 中使用 XML onClick 处理按钮点击
查看双“****”之间的代码。我怎么了？
我在下面包含了xml；我怀疑问题就在那里。
EventListFragment.java
public class EventListFragment extends ListFragment implements OnClickListener, LoaderCallbacks<Cursor> { private SimpleCursorAdapter mAdapter; List strRecId = new ArrayList(); private ListAdapter lstAdapter; private Button btn_Add; List strRecord = new ArrayList(3); List strFields = new ArrayList(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // View myFragmentView = inflater.inflate(R.layout.event_list); //-----------------------------------------------------; // ALSO LOOK FOR "INITRUN" BELOW AND COMMENT OUT STATEMENT; // IN TWO PLACES; //-------------------------------------------------------; // BELOW READS FROM DATABASE AND DISPLAYS EVENTNAME; // THEN ALLOWS UPDATE OF THEM ABD INSERT FROM EXISTING; // Log.d("EventLst","X onCrt: x01 START" ); String[] strItems = new String[] { EventProvider.COLUMN_EVENTNAME }; Log.d("EventLst","X onCrt: x01strI:" + strItems[0]); int[] iCnt = new int[] { R.id.text1 }; mAdapter = new SimpleCursorAdapter(getActivity(),R.layout.event_row, null, strItems, iCnt, 0); Log.d("EventLst","X onCrt: x02 START" ); setListAdapter(mAdapter); getLoaderManager().initLoader(0, null, this); Log.d("EventLst","X onCrt: x03 START" ); } //----> backto public void onCreate // //------------------------------------------------------- // Log.d("EventLst","X onCrt: DONE" ); //--------------------------------------------------------- @Override public void onActivityCreated(Bundle savedInstanceState) //* The activity (not fragment's) onCreate() method returns and calls //* onActivityCreated() callback { super.onActivityCreated(savedInstanceState); Log.d("EventLst","S onActCrtd"); //* The ListFragment supports showing a message when the list is empty. Uses a //* value of R.string.loadingmsg - Add to strings.xml setEmptyText(getResources().getString(R.string.loadingmsg)); registerForContextMenu(getListView()); setHasOptionsMenu(true); Log.d("EventLst","X onActCrtd" ); } //*--------------------------------------------------------------- //* START EDIT ACTIVITY: // user clicked in list, start edit view // startActivity (...) starts edit activity, passing id = n // where "n" is (record key) id from list @Override public void onListItemClick(ListView l,View V, int position, long id) { super.onListItemClick(l, V, position, id); Log.d("EventLst","S onLsItmCk" + ";P:" + position + ";I:" + id); long lgRecN = 0; // id is the position in the list of activities, // we will use it to get the RowId of this record in DB if (id == 1) { android.os.Process.killProcess(android.os.Process.myPid()); } if (id > 0) { String strRecN = (String) strRecId.get((int) id-1); lgRecN = Long.parseLong(strRecN); } else { lgRecN = 0; }; startActivity(new Intent(getActivity(), EventEditActivity.class) .putExtra(EventProvider.COLUMN_ROWID, lgRecN) ); // Log.d("EventLst","X onLsItmCk" + ";I:" + id); } //****************************************************; //****************************************************; // This was copied precisely from: // https://stackoverflow.com/questions/6091194/how-to-handle-button-clicks-using- // the-xml-onclick-within-fragments/7969020#7969020 // then shangrd "StartButton" to btn_Exit // I had errors //@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.event_list, container, false); Log.d("EventLst","S creatrView"); Button b = (Button) v.findViewById(R.id.btn_Add); b.setOnClickListener(this); Log.d("EventLst","S onLsItmCk" + v); return v; } @Override public void onClick(View v) { Log.d("EventLst","S onclkBtn" + v); } //**************************************************; //***************************************************; @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); Log.d("EventLst","S onVwCrt"); setEmptyText(getResources().getString(R.string.loadingmsg)); registerForContextMenu(getListView()); Log.d("EventLst","X onVwCrt"); }
event_list.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:name="com.dummies.android.taskreminder.EventListFragment" > <Button android:id="@+id/btn_Add" android:layout_width="50dp" android:layout_height="30dp" android:textSize="12dp" android:padding="1dip" android:text="@string/add" /> <Button android:id="@+id/btn_Exit" android:layout_width="50dp" android:layout_height="30dp" android:textSize="12dp" android:padding="1dip" android:layout_marginLeft="5dp" android:layout_toRightOf="@+id/btn_Add" android:text="@string/exit" /> <Button android:id="@+id/btn_Other" android:layout_width="50dp" android:layout_height="30dp" android:textSize="12dp" android:padding="1dip" android:layout_marginLeft="5dp" android:layout_toRightOf="@+id/btn_Exit" android:text="@string/other" /> <fragment android:name="com.dummies.android.taskreminder.EventListFragment" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/btn_Add" /> </RelativeLayout>
event_row.xml
<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:textSize="12dp" android:padding="2dip" />