我实施了Fragment ListView，其中ActionBar具有上下文ActionMode。
OnLongClick启动上下文ListView以选择onLongClick的项目并删除所选项目。这部分工作得很好。我无法选择ListView的第一个条目 - 但这只是一个小问题。
正常＆＃39; onClick打开另一个活动，其中包含相应Activity条目的详细信息。打开新的ListView可以正常工作。但问题是：OnClick还会选择相应的<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.test.resultfragment" >
<ListView
android:id="@+id/fragment_result_listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:choiceMode="multipleChoice"
android:divider="@color/ktbl_gray_3"
android:dividerHeight="1dp"
android:listSelector="@drawable/selectable_background"
android:saveEnabled="true"
android:smoothScrollbar="true" >
</ListView>
<TextView
android:id="@+id/fragment_result_textView_empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical|center_horizontal"
android:text="No entries"
android:textColor="@color/android_icon_dark"
android:textSize="16sp"
android:visibility="gone" />
</FrameLayout>
条目。
如何解决这个问题。有什么建议吗？
片段的XML：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:exitFadeDuration="@android:integer/config_mediumAnimTime">
<item android:drawable="@drawable/list_focused"
android:state_focused="true"
android:state_pressed="false"/>
<item android:drawable="@drawable/list_focused"
android:state_activated="true"/>
<item android:drawable="@drawable/list_pressed"
android:state_pressed="true"/>
<item android:drawable="@android:color/transparent"/>
</selector>
选择器：
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/activatedBackgroundIndicator"
android:columnCount="4"
android:orientation="horizontal"
android:padding="@dimen/listview_padding"
android:rowCount="4" >
<!-- etc. ... -->
</GridLayout>
行的XML的短版本：
public class ResultFragment extends Fragment implements OnItemClickListener, OnItemLongClickListener {
private static final String TAG = ResultFragment.class.getName();
private Activity mActivity;
private ActionModeCallback mActionModeCallback;
private ActionMode mActionMode;
private ListView mListView;
private ResultAdapter mAdapter;
private ResultDAO mResultDAO;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.i(TAG, "onActivityCreated");
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.i(TAG, "onCreateView");
mActivity = getActivity();
mActionModeCallback = new ActionModeCallback();
mResultDAO = new ResultDAO(mActivity);
View fragmentView = inflater.inflate(R.layout.myfragment, container, false);
setupView(fragmentView);
return fragmentView;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
Log.i(TAG, "onCreateOptionsMenu");
inflater.inflate(R.menu.result_fragment, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Log.i(TAG, "onOptionsItemSelected");
switch (item.getItemId()) {
case R.id.menu_item_result_fragment_help:
startActivity(new Intent(getActivity(), ResultHelpActivity.class));
break;
default:
Log.w(TAG, "onOptionsItemSelected - default case");
break;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Log.w(TAG, "onItemClick");
if (mActionMode == null) {
/* No contextual ActionBar active - show detail Activity */
Result result = mAdapter.getItem(position);
Intent resultDetailsIntent = new Intent(mActivity, ResultDetails.class);
resultDetailsIntent.putExtra(AppConstants.TAG_RESULT, result);
startActivity(resultDetailsIntent);
} else {
/* Contextual ActionBar active - Selectie/deselect ListView entries */
mListView.setItemChecked(position, mListView.isItemChecked(position));
updateCABTitle(mActionMode);
}
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
Log.w(TAG, "onItemLongClick");
if (mActionMode == null) {
mActionMode = mActivity.startActionMode(mActionModeCallback);
/* false : onItemLongClick was not consumed --> open onItemClick() */
return false;
}
/* true : onItemLongClick was consumed --> do nothing */
return true;
}
private void setupView(View fragmentView) {
Log.i(TAG, "setupView");
setHasOptionsMenu(true);
mAdapter = new ResultAdapter(mActivity);
mListView = (ListView) fragmentView.findViewById(R.id.fragment_result_listView);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener((OnItemClickListener) this);
mListView.setOnItemLongClickListener((OnItemLongClickListener) this);
/* Set emptyView */
TextView emptyView = (TextView) fragmentView.findViewById(R.id.fragment_result_textView_empty);
mListView.setEmptyView((View) emptyView);
}
private void selectAllEntries() {
Log.i(TAG, "selectAllEntries");
for (int i = 0; i < mListView.getCount(); ++i) {
mListView.setItemChecked(i, true);
}
updateCABTitle(mActionMode);
}
private void deselectAllEntries() {
Log.i(TAG, "deselectAllEntries");
for (int i = 0; i < mListView.getCount(); ++i) {
mListView.setItemChecked(i, false);
}
updateCABTitle(mActionMode);
}
private void deleteSelectedEntries() {
Log.i(TAG, "deleteSelectedEntries");
SparseBooleanArray checkedItems = mListView.getCheckedItemPositions();
for (int i = 0; i < checkedItems.size(); ++i) {
if (checkedItems.valueAt(i)) {
Result result = (Result) mListView.getItemAtPosition(i);
if (result != null) {
mResultDAO.deleteResult(result);
}
}
}
refreshView();
}
private void refreshView() {
Log.i(TAG, "refreshView");
mActivity.runOnUiThread(new Runnable() {
@Override
public void run() {
mAdapter.notifyDataSetChanged();
}
});
}
private void updateCABTitle(ActionMode actionMode) {
Log.i(TAG, "updateCABTitle");
if (actionMode != null) {
int numberOfCheckedItems = mListView.getCheckedItemCount();
actionMode.setTitle(String.valueOf(numberOfCheckedItems) + " " + getString(R.string.selektiert));
}
}
private class ActionModeCallback implements ActionMode.Callback {
/** Called when the action mode is created. This is called by startActionMode() */
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
Log.i(TAG, "onCreateActionMode");
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.result_fragment_cab, menu);
updateCABTitle(mode);
return true;
}
/** Invoked whenever the action mode is shown. This is invoked immediately after onCreateActionMode */
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
Log.i(TAG, "onPrepareActionMode");
return true;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
Log.i(TAG, "onActionItemClicked");
switch (item.getItemId()) {
case R.id.menu_item_cab_result_fragment_delete_selected:
deleteSelectedEntries();
/* Close contextual ActionBar */
mode.finish();
return true;
case R.id.menu_item_cab_result_fragment_select_all:
selectAllEntries();
return true;
case R.id.menu_item_cab_result_fragment_deselect_all:
deselectAllEntries();
return true;
default:
Log.w(TAG, "onActionItemClicked - default case");
return false;
}
}
/** Called when user exits action mode */
@Override
public void onDestroyActionMode(ActionMode mode) {
Log.w(TAG, "onDestroyActionMode");
mActionMode = null;
deselectAllEntries();
}
}
}
代码：
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