我有活动类（）：
package com.wts.ui;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockActivity;
//import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.wts.ui.MainActivity.OnContextItemSelectedListener;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
public class TabHostActivity extends SherlockActivity
implements OnContextItemSelectedListener
{
private ActionBar actionBar;
protected final static int REQUEST_CODE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
SettingsManager.setPreferedTheme(this);//setTheme
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab_host);
actionBar = getSupportActionBar();
actionBar.setDisplayOptions(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayShowTitleEnabled(false);
Tab tabA = actionBar.newTab().setText("A Tab");
Fragment fragmentC = new MainActivity();
tabA.setTabListener(new MyTabsListener(fragmentC));
actionBar.addTab(tabA);
@Override
public void StartSherlockActivity(Intent intent) {
startActivityForResult(intent, REQUEST_CODE);
//saveInstance of tab position
}
public static class MyTabListener<T extends Fragment> implements
ActionBar.TabListener {
private Fragment mFragment;
private final SherlockActivity mActivity;
private final String mTag;
private final Class<T> mClass;
/**
* Constructor used each time a new tab is created.
*
* @param activity
* The host Activity, used to instantiate the fragment
* @param tag
* The identifier tag for the fragment
* @param clz
* The fragment's Class, used to instantiate the fragment
*/
public MyTabListener(SherlockActivity activity, String tag, Class<T> clz) {
mActivity = activity;
mTag = tag;
mClass = clz;
}
/* The following are each of the ActionBar.TabListener callbacks */
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// Check if the fragment is already initialized
if (mFragment == null) {
// If not, instantiate and add it to the activity
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(R.layout.activity_tab_host, mFragment, mTag);
} else {
// If it exists, simply attach it in order to show it
// ft.setCustomAnimations(android.R.animator.fade_in,
// R.animator.animationtest);
ft.attach(mFragment);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
// ft.setCustomAnimations(android.R.animator.fade_in,
// R.animator.test);
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
protected class MyTabsListener implements ActionBar.TabListener {
private Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.add(R.id.fragment_container, fragment, null);
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// some people needed this line as well to make it work:
ft.remove(fragment);
}
}
}
它的布局 XML ：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/fragment_container"></LinearLayout>
</LinearLayout>
和片段类：
public class MainActivity extends Fragment {
public interface OnContextItemSelectedListener{
public void StartSherlockActivity(Intent intent);
}
private OnContextItemSelectedListener onContextMenuListener;
//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;
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
// Called when the action mode is created; startActionMode() was called
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// Inflate a menu resource providing context menu items
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.context_menu_list, menu);
return false;
}
// Called each time the action mode is shown. Always called after
// onCreateActionMode, but
// may be called multiple times if the mode is invalidated.
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch(item.getItemId())
{
case R.id.Edit_cm:
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));
onContextMenuListener.StartSherlockActivity(intent);
break;
case R.id.Info_cm:
break;
case R.id.Delete_cm:
break;
default:return false;
}
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.activity_about, container,
false);
dbAdapter = new WordsDBAdapter(getActivity());
dbAdapter.open();
button = (Button) view.findViewById(R.id.buttonAddWord);
listView = (ListView) view.findViewById(R.id.listWords);
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) {
editWord = (EditText) view.findViewById(R.id.editWord);
editTranslate = (EditText) view
.findViewById(R.id.editTranslate);
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("");
}
}
}
});
return view;
}
@Override
public void onCreate(Bundle savedInstanceState) {
// SettingsManager.setPreferedTheme(this);//setTheme
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
onContextMenuListener = (OnContextItemSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString() + " must implement OnArticleSelectedListener");
}
}
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((Activity) listView.getContext(),
R.layout.word_info, cursor, columns, to);
listView.setAdapter(cDataAdapter);
}
@Override
public void onResume() {
super.onResume();
// SettingsManager.setPreferedLanguage(this);// 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();
}
}
它的布局 XML ：
<RelativeLayout 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"
android:focusable="true"
android:focusableInTouchMode="true"
tools:context=".MainActivity" >
<Button
android:id="@+id/buttonAddWord"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignBottom="@+id/editTranslate"
android:layout_alignTop="@+id/editTranslate"
android:layout_toRightOf="@id/editTranslate"
android:drawableTop="@drawable/plus" />
<TextView
android:id="@+id/textViewEditTranslateDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textViewEditWordDescription"
android:layout_alignLeft="@+id/editTranslate"
android:text="@string/scndRow"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="@+id/textViewEditWordDescription"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/editTranslate"
android:layout_alignParentLeft="true"
android:text="@string/fstRow"
android:textAppearance="?android:attr/textAppearanceSmall" />
<EditText
android:id="@+id/editTranslate"
android:layout_width="140dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/editWord"
android:ems="10"
android:inputType="textCapSentences" />
<EditText
android:id="@+id/editWord"
android:layout_width="140dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:ems="10"
android:inputType="textCapSentences" >
</EditText>
<ListView
android:id="@+id/listWords"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/textViewEditTranslateDescription"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</RelativeLayout>
对不起巨大的代码，但没关系，我在或其他一些重叠的过程中做错了什么onCreateView()，为什么我的 MainActivity 内容没有出现，我看不到选项卡，我在屏幕上看到的只是 actionBar 和应用程序图标。我的代码有什么问题？