由于某种原因，我的 Fragment 从未调用onCreateOptionsMenu过我的菜单，溢出菜单从未出现，并且在模拟器中按下菜单按钮也无济于事。我试过使用setHasOptionsMenu(true)，但这也无济于事。有任何想法吗？
这是我的onCreate, onCreateOptionsMenu and onPrepareOptionsMenu
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
setMenuVisibility(true);
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
super.onCreateOptionsMenu(menu, inflater);
}
编辑：
完整的片段代码。
public class BackupFragment extends ExpandableListFragment {
public static final Uri SMS_URI = Uri.parse("content://sms");
private static final int CONTEXTMENU_IMPORT = 21;
private static final int CONTEXTMENU_DELETEFILE = 22;
private static final int CONTEXTMENU_DELETEDAY = 23;
private static final int UPLOAD_DROPBOX = 24;
private static final int UPLOAD_DRIVE = 25;
private static final int DIALOG_LICENSEAGREEMENT = 1;
private static final int DIALOG_ABOUT = 2;
public static final int DIALOG_EXPORT = 4;
public static final String STANDARD_DIRNAME = new StringBuilder(Environment.getExternalStorageDirectory().toString()).append("/backup/").toString();
public static File DIR;
public static final boolean CANHAVEROOT = checkRoot();
public static BackupFragment INSTANCE;
@SuppressWarnings("deprecation")
public static final int API_LEVEL = Integer.parseInt(Build.VERSION.SDK);
public BackupFilesListAdapter listAdapter;
private AlertDialog deleteFileDialog;
private AlertDialog deleteDayDialog;
private ProgressDialog exportDialog;
private ProgressDialog importDialog;
private AlertDialog selectExportsDialog;
private ExporterInfos exporterInfos;
private View FragmentView;
/**
* Sets up the main content of the application (i.e. loads the list of
* available backups and generates the context menu).
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
FragmentView = inflater.inflate(R.layout.backup_fragment, container, false);
//registerForContextMenu(FragmentView);
return FragmentView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
INSTANCE = this;
super.onActivityCreated(savedInstanceState);
Crittercism.init(getActivity().getApplicationContext(), "516574be558d6a5f8a00001f");
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
String dirName = preferences.getString(Strings.PREFERENCE_STORAGELOCATION, STANDARD_DIRNAME);
if (TextUtils.isEmpty(dirName)) {
dirName = STANDARD_DIRNAME;
}
DIR = new File(dirName);
listAdapter = new BackupFilesListAdapter(getActivity(), preferences);
getExpandableListView().setAdapter(listAdapter);
getExpandableListView().setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
ExpandableListView.ExpandableListContextMenuInfo expandableInfo = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
menu.setHeaderTitle(((TextView) ((ExpandableListView.ExpandableListContextMenuInfo) menuInfo).targetView.findViewById(android.R.id.text1)).getText());
if (ExpandableListView.getPackedPositionType(expandableInfo.packedPosition) == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
menu.add(0, CONTEXTMENU_IMPORT, Menu.NONE, R.string.button_import);
menu.add(0, CONTEXTMENU_DELETEFILE, Menu.NONE, R.string.contextmenu_deletefile);
menu.add(0, UPLOAD_DROPBOX, Menu.NONE, R.string.upload_dropbox);
menu.add(0, UPLOAD_DRIVE, Menu.NONE, R.string.upload_drive);
} else {
menu.add(0, CONTEXTMENU_DELETEDAY, Menu.NONE, R.string.contextmenu_deletedaydata);
}
}
});
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
setMenuVisibility(true);
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Log.d(getClass().getSimpleName(), item.toString());
switch (item.getItemId()) {
case R.id.menu_about: {
showDialog(DIALOG_ABOUT);
break;
}
case CONTEXTMENU_DELETEFILE: {
/* using "showDialog" with a Bundle is only available from api version 8 on, so we cannot directly use this. Lets impose this */
long packedPosition = ((ExpandableListView.ExpandableListContextMenuInfo) item.getMenuInfo()).packedPosition;
if (ExpandableListView.getPackedPositionType(packedPosition) != ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
break;
}
final File file = listAdapter.getChild(ExpandableListView.getPackedPositionGroup(packedPosition), ExpandableListView.getPackedPositionChild(packedPosition));
if (deleteFileDialog == null) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setTitle(android.R.string.dialog_alert_title);
builder.setPositiveButton(android.R.string.yes, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// just to enable the button
}
});
builder.setNegativeButton(android.R.string.no, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setMessage(Strings.EMPTY); // just so that the string is available
deleteFileDialog = builder.create();
}
deleteFileDialog.show();
deleteFileDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (!file.exists() || file.delete()) {
listAdapter.remove(file);
} else {
// show error
}
deleteFileDialog.dismiss();
}
});
deleteFileDialog.setMessage(String.format(getString(R.string.question_deletefile), file.toString()));
break;
}
case CONTEXTMENU_IMPORT: {
ExpandableListView.ExpandableListContextMenuInfo menuInfo = (ExpandableListView.ExpandableListContextMenuInfo) item.getMenuInfo();
long packedPosition = menuInfo.packedPosition;
if (ExpandableListView.getPackedPositionType(packedPosition) != ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
break;
}
if (importDialog == null) {
importDialog = new ProgressDialog(getActivity());
}
checkProgressDialog(importDialog);
new ImportTask(importDialog, listAdapter.getChild(ExpandableListView.getPackedPositionGroup(packedPosition), ExpandableListView.getPackedPositionChild(packedPosition)), (Integer) menuInfo.targetView.getTag());
break;
}
case CONTEXTMENU_DELETEDAY: {
long packedPosition = ((ExpandableListView.ExpandableListContextMenuInfo) item.getMenuInfo()).packedPosition;
if (ExpandableListView.getPackedPositionType(packedPosition) != ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
break;
}
final int groupPosition = ExpandableListView.getPackedPositionGroup(packedPosition);
Date date = listAdapter.getGroup(groupPosition);
if (deleteDayDialog == null) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setTitle(android.R.string.dialog_alert_title);
builder.setPositiveButton(android.R.string.yes, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// just to enable the button
}
});
builder.setNegativeButton(android.R.string.no, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setMessage(Strings.EMPTY); // just so that the string is available
deleteDayDialog = builder.create();
}
deleteDayDialog.show();
deleteDayDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Vector<File> files = listAdapter.getChildren(groupPosition);
Vector<File> deletedFiles = new Vector<File>();
for (File file : files) {
if (!file.exists() || file.delete()) {
deletedFiles.add(file);
} else {
// show error
}
}
listAdapter.remove(deletedFiles);
deleteDayDialog.dismiss();
}
});
deleteDayDialog.setMessage(String.format(getString(R.string.question_deletefile), DateFormat.getDateInstance().format(date)));
break;
}
case R.id.menu_exporteverything: {
if (exportDialog == null) {
exportDialog = new ProgressDialog(getActivity());
}
checkProgressDialog(exportDialog);
checkExportTaskForIncompleteData(new ExportTask(exportDialog, listAdapter, EverythingExporter.ID));
break;
}
case R.id.menu_export: {
if (selectExportsDialog == null) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setIcon(android.R.drawable.ic_dialog_info);
builder.setTitle(R.string.dialog_export);
exporterInfos = Exporter.getExporterInfos(getActivity());
builder.setNegativeButton(android.R.string.cancel, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setItems(exporterInfos.names, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
if (exportDialog == null) {
exportDialog = new ProgressDialog(getActivity());
}
checkProgressDialog(exportDialog);
checkExportTaskForIncompleteData(new ExportTask(exportDialog, listAdapter, exporterInfos.ids[which]));
}
});
selectExportsDialog = builder.create();
}
selectExportsDialog.show();
break;
}
case R.id.menu_settings: {
break;
}
case UPLOAD_DROPBOX: {
Intent i = new Intent(getActivity(), Dropbox.class);
long packedPosition = ((ExpandableListView.ExpandableListContextMenuInfo) item.getMenuInfo()).packedPosition;
final File file = listAdapter.getChild(ExpandableListView.getPackedPositionGroup(packedPosition), ExpandableListView.getPackedPositionChild(packedPosition));
i.putExtra("file", file.toString());
i.putExtra("path", file.getName());
startActivity(i);
break;
}
case UPLOAD_DRIVE: {
Intent i = new Intent(getActivity(), DriveAuth.class);
long packedPosition = ((ExpandableListView.ExpandableListContextMenuInfo) item.getMenuInfo()).packedPosition;
final File file = listAdapter.getChild(ExpandableListView.getPackedPositionGroup(packedPosition), ExpandableListView.getPackedPositionChild(packedPosition));
i.putExtra("file", file.toString());
i.putExtra("path", file.getName());
startActivity(i);
}
}
return super.onOptionsItemSelected(item);
}
/**
* Checks if the exporter that is attached to the given ExportTask may
* produce incomplete data and shows a warning if this is the case and
* if the user wants to get notified. Note that the standard setting is
* to show the warning.
* The user may also cancel the warning dialog which results in the
* export to be not performed.
*
* @param exportTask task whose exporter is checked w.r.t. incomplete
* exports
*/
private void checkExportTaskForIncompleteData(final ExportTask exportTask) {
Exporter exporter = exportTask.getExporter();
if (!PreferenceManager.getDefaultSharedPreferences(getActivity()).getBoolean(Strings.PREFERENCE_HIDEDATAWARNINGS, false) && exporter.maybeIncomplete()) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(android.R.string.dialog_alert_title);
builder.setMessage(getString(R.string.warning_incompletedata_export, exporter.getIncompleteDataNames(getActivity())));
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
exportTask.execute();
}
});
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.setCancelable(true);
builder.show();
} else {
exportTask.execute();
}
}
/**
* Here, the given progress dialog will be reset.
*
* @param dialog progress dialog to be reset
*/
private void checkProgressDialog(ProgressDialog dialog) {
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setProgress(0);
dialog.setMax(100);
dialog.setMessage(Strings.EMPTY); // we just have to set some non-null value to enable the title
}
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
if (importDialog == null) {
importDialog = new ProgressDialog(getActivity());
}
checkProgressDialog(importDialog);
new ImportTask(importDialog, listAdapter.getChild(groupPosition, childPosition), (Integer) v.getTag());
return true;
}
protected void showDialog(int id) {
if (id == DIALOG_LICENSEAGREEMENT) {
AlertDialogFragment myDialogFragment = AlertDialogFragment.newInstance();
myDialogFragment.show(getFragmentManager(), "myDialogFragment");
}
}
/**
* In order to perform certain backups (such as the wifi settings), we
* need root to access the corresponding configuration files.
*
* @return true if <i>root</i> access can be obtained, <i>false</i>
* otherwise
*/
private static boolean checkRoot() {
try {
Process process = Runtime.getRuntime().exec("/system/bin/ls -l /system/bin/su /system/xbin/su");
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = reader.readLine();
reader.close();
process.destroy();
return line != null && line.length() > 9 && line.charAt(9) == 'x';
} catch (Exception e) {
return false;
}
}
}