我正在尝试将Activity转换为片段，并且无法覆盖以下方法：onCreateOptionsMenu，onOptionsItemSelected，onContextItemSelected。
，也许缺少一些导入语句？不知道该怎么办。这是我的班级文件：
包com.wts.ui;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
public class MainFragment extends Fragment {
protected final static int REQUEST_CODE = 1;
public static WordsDBAdapter dbAdapter;
private CustomAdapter cDataAdapter;
private Button button;
private EditText editWord;
private EditText editTranslate;
private ListView listView;
private String selectedWord;
private Cursor cursor;
// context menu
private final static int IDM_EDIT = 101;
private final static int IDM_DELETE = 102;
private final static int IDM_INFO = 103;
// options menu
private static final int IDM_ABOUT = 201;
private static final int IDM_EXIT = 202;
private static final int IDM_SETTINGS = 203;
private static final int IDM_QUESTION = 204;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
dbAdapter = new WordsDBAdapter(getActivity());
dbAdapter.open();
displayListView();
registerForContextMenu(listView);
// ================ListView onLongClick========================
listView.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
cursor = (Cursor) listView.getItemAtPosition(arg2);
selectedWord = cursor.getString(WordsDBAdapter.ID_COL);
return false;
}
});
// ================Button onClick========================
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String word = editWord.getText().toString();
String translate = editTranslate.getText().toString();
if (word.length() > 0 && translate.length() >= 0) {
Cursor cursor = dbAdapter.fetchWordsByName(word);// chek is
// word
// repeat
if (cursor.moveToFirst()) {
Toast.makeText(getActivity().getApplicationContext(),
getResources().getString(R.string.word_exist),
Toast.LENGTH_SHORT).show();
} else if (!CheckWordInput(word)
|| !CheckTranslateInput(translate)) {
Toast.makeText(
getActivity().getApplicationContext(),
getResources().getString(
R.string.incorrect_input),
Toast.LENGTH_SHORT).show();
} else {
dbAdapter.insertWord(word, translate, " ",
String.valueOf(false), 0, 0, new Date());
displayListView();
editWord.setText("");
editTranslate.setText("");
}
}
}
});
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, container, false);
button = (Button) view.findViewById(R.id.buttonAddWord);
listView = (ListView) view.findViewById(R.id.listWords);
editWord = (EditText) view.findViewById(R.id.editWord);
editTranslate = (EditText) view.findViewById(R.id.editTranslate);
return view;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
// setContentView(R.layout.activity_main);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
if (v.getId() == R.id.listWords) {
String[] menuItems = getResources().getStringArray(
R.array.contextMenuItems);
menu.add(Menu.NONE, IDM_EDIT, Menu.NONE,
menuItems[StartActivity.CONTEXT_MENU_EDIT]);
menu.add(Menu.NONE, IDM_INFO, Menu.NONE,
menuItems[StartActivity.CONTEXT_MENU_INFO]);
menu.add(Menu.NONE, IDM_DELETE, Menu.NONE,
menuItems[StartActivity.CONTEXT_MENU_DELETE]);
}
}
//
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case IDM_EDIT: {
Intent intent = new Intent(getActivity(), EditActivity.class);
intent.putExtra(getResources().getString(R.string.fstRow),
cursor.getString(WordsDBAdapter.WORD_COL));
intent.putExtra(getResources().getString(R.string.scndRow),
cursor.getString(WordsDBAdapter.TRANS_COL));
intent.putExtra(getResources().getString(R.string.thrdRow),
cursor.getString(WordsDBAdapter.DESC_COL));
startActivityForResult(intent, REQUEST_CODE);
}
break;
case IDM_DELETE:
dbAdapter.deleteWord(selectedWord);
displayListView();
break;
case IDM_INFO: {
Intent intent = new Intent(getActivity(), InformationActivity.class);
for (int i = 1; i <= InformationActivity.nListItems; i++)
intent.putExtra(String.valueOf(i), cursor.getString(i));
startActivity(intent);
}
break;
default:
return super.onContextItemSelected(item);
}
return true;
}
private void displayListView() {
// Cursor cursor = dbAdapter.fetchAllTranslated();
Cursor cursor = dbAdapter.fetchAllTranslated();
String[] columns = new String[] { WordsDBAdapter.KEY_WORD,
WordsDBAdapter.KEY_TRANSLATION, WordsDBAdapter.KEY_SUCCEEDED, };
int[] to = new int[] { R.id.textViewTranslate, R.id.textViewWord,
R.id.textViewSuccessPoints };
cDataAdapter = new CustomAdapter(getActivity(), R.layout.word_info,
cursor, columns, to);
listView.setAdapter(cDataAdapter);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.activity_main, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case IDM_ABOUT: {
Intent intent = new Intent(getActivity(), AboutActivity.class);
startActivity(intent);
break;
}
case IDM_EXIT: {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
getActivity().finish();
break;
}
case IDM_SETTINGS: {
Intent intent = new Intent(getActivity(), SettingsActivity.class);
startActivity(intent);
break;
}
case IDM_QUESTION: {
if (!StartActivity.isMainActivitySart)
getActivity().onBackPressed();
else {
Intent intent = new Intent(getActivity(),
QuestionActivity.class);
startActivity(intent);
}
}
break;
}
return true;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE) {
if (intent.hasExtra(getResources().getString(R.string.fstRow))) {
dbAdapter.changeValue(
selectedWord,
intent.getExtras().getString(
getResources().getString(R.string.fstRow)),
intent.getExtras().getString(
getResources().getString(R.string.scndRow)),
intent.getExtras().getString(
getResources().getString(R.string.thrdRow)),
null, null, null, null);
displayListView();
}
}
}
@Override
public void onResume() {
super.onResume();
SettingsManager.setPreferedLanguage(getActivity());// set language
displayListView();
}
public static boolean CheckTranslateInput(String str) {
Pattern inputPattern = Pattern.compile("[\\p{L} -]{0,25}");
Matcher inputMatcher = inputPattern.matcher(str);
return inputMatcher.matches();
}
public static boolean CheckWordInput(String str) {
Pattern inputPattern = Pattern.compile("[\\p{L} -]{1,25}");
Matcher inputMatcher = inputPattern.matcher(str);
return inputMatcher.matches();
}
@Override
public void onDetach() {
super.onDetach();
dbAdapter.close();
}
}
最佳答案
您必须考虑要让片段成为什么-Fragment或SherlockFragment？
您导入此：
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
因此，您的替代不是替代，因为
Menu和朋友现在是与Fragment所需要的类不同的类-它们是ActionBarSherlock的类。如果改为扩展
SherlockFragment，则覆盖应该起作用，如果使用ActionBarSherlock（基于标签，则建议）扩展SherlockFragment。如果要将其保留为常规片段，请导入：
android.view.Menu
android.view.MenuItem
android.view.MenuInflater