我目前正在尝试按照 Google IO 2013 指南实施新的 NavigationDrawer。我正在使用 ActionbarSherlock。代码运行良好。唯一的问题是，当拉出导航抽屉时，我无法切换应用程序图标旁边的“向上”插入符号。我在下面粘贴我的整个代码。请帮忙。
public class MainActivity extends SherlockFragmentActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mPlanetTitles;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTitle = mDrawerTitle = getTitle();
mPlanetTitles = getResources().getStringArray(R.array.planets_array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.drawer);
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mPlanetTitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
supportInvalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
supportInvalidateOptionsMenu();
}
};
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
new Thread(new Runnable() {
@Override
public void run() {
prefs = getPreferences(MODE_PRIVATE);
opened = prefs.getBoolean(OPENED_KEY, false);
if(opened == false)
{
mDrawerLayout.openDrawer(mDrawerList);
}
}
}).start();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(getMenuItem(item))) {
return true;
}
switch (item.getItemId()) {
case R.id.action_websearch:
Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY, getSupportActionBar().getTitle());
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
} else {
Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show();
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private android.view.MenuItem getMenuItem(final MenuItem item) {
return new android.view.MenuItem() {
@Override
public int getItemId() {
return item.getItemId();
}
public boolean isEnabled() {
return true;
}
@Override
public boolean collapseActionView() {
return false;
}
@Override
public boolean expandActionView() {
return false;
}
@Override
public ActionProvider getActionProvider() {
return null;
}
@Override
public View getActionView() {
return null;
}
@Override
public char getAlphabeticShortcut() {
return 0;
}
@Override
public int getGroupId() {
return 0;
}
@Override
public Drawable getIcon() {
return null;
}
@Override
public Intent getIntent() {
return null;
}
@Override
public ContextMenuInfo getMenuInfo() {
return null;
}
@Override
public char getNumericShortcut() {
return 0;
}
@Override
public int getOrder() {
return 0;
}
@Override
public SubMenu getSubMenu() {
return null;
}
@Override
public CharSequence getTitle() {
return null;
}
@Override
public CharSequence getTitleCondensed() {
return null;
}
@Override
public boolean hasSubMenu() {
return false;
}
@Override
public boolean isActionViewExpanded() {
return false;
}
@Override
public boolean isCheckable() {
return false;
}
@Override
public boolean isChecked() {
return false;
}
@Override
public boolean isVisible() {
return false;
}
@Override
public android.view.MenuItem setActionProvider(ActionProvider actionProvider) {
return null;
}
@Override
public android.view.MenuItem setActionView(View view) {
return null;
}
@Override
public android.view.MenuItem setActionView(int resId) {
return null;
}
@Override
public android.view.MenuItem setAlphabeticShortcut(char alphaChar) {
return null;
}
@Override
public android.view.MenuItem setCheckable(boolean checkable) {
return null;
}
@Override
public android.view.MenuItem setChecked(boolean checked) {
return null;
}
@Override
public android.view.MenuItem setEnabled(boolean enabled) {
return null;
}
@Override
public android.view.MenuItem setIcon(Drawable icon) {
return null;
}
@Override
public android.view.MenuItem setIcon(int iconRes) {
return null;
}
@Override
public android.view.MenuItem setIntent(Intent intent) {
return null;
}
@Override
public android.view.MenuItem setNumericShortcut(char numericChar) {
return null;
}
@Override
public android.view.MenuItem setOnActionExpandListener(OnActionExpandListener listener) {
return null;
}
@Override
public android.view.MenuItem setOnMenuItemClickListener(OnMenuItemClickListener menuItemClickListener) {
return null;
}
@Override
public android.view.MenuItem setShortcut(char numericChar, char alphaChar) {
return null;
}
@Override
public void setShowAsAction(int actionEnum) {
}
@Override
public android.view.MenuItem setShowAsActionFlags(int actionEnum) {
return null;
}
@Override
public android.view.MenuItem setTitle(CharSequence title) {
return null;
}
@Override
public android.view.MenuItem setTitle(int title) {
return null;
}
@Override
public android.view.MenuItem setTitleCondensed(CharSequence title) {
return null;
}
@Override
public android.view.MenuItem setVisible(boolean visible) {
return null;
}
};
}
/* The click listner for ListView in the navigation drawer */
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
// update the main content by replacing fragments
Fragment fragment = new PlanetFragment();
Bundle args = new Bundle();
args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
fragment.setArguments(args);
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
setTitle(mPlanetTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
/**
* Fragment that appears in the "content_frame", shows a planet
*/
public static class PlanetFragment extends SherlockFragment {
public static final String ARG_PLANET_NUMBER = "planet_number";
public PlanetFragment() {
// Empty constructor required for fragment subclasses
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
int i = getArguments().getInt(ARG_PLANET_NUMBER);
String planet = getResources().getStringArray(R.array.planets_array)[i];
// change int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()), "drawable", getActivity().getPackageName());
int imageId = getResources().getIdentifier("tempmap", "drawable", getActivity().getPackageName());
// change ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
// change getActivity().setTitle(planet);
getActivity().setTitle("MapView");
return rootView;
}
}
}