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我是java的新手，並且遇到無法修復的錯誤。 我的應用程序正在使用導航抽屜，當我打開它時，應用程序變得非常慢，logcat顯示跳幀消息，並且應用程序可能在其主線程上做了太多工作...該應用程序可能在其主線程（導航抽屜）上做了太多工作
知道如何解決它。 這是調用抽屜的代碼的一部分。
public class MainActivity extends SwipeRefreshActivity implements
LocationListener, GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private View mPanelMenu;
private ActionBarDrawerToggle mDrawerToggle;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
private Menu[] MENUS;
public static Location location;
public static List<Address> address;
public static int offsetY = 0;
private static SQLiteDatabase db;
private static DbHelper dbHelper;
private static Queries q;
protected static ImageLoader imageLoader;
private static boolean isShownSplash = false;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
boolean mUpdatesRequested = false;
// Handle to SharedPreferences for this app
SharedPreferences mPrefs;
// Handle to a SharedPreferences editor
SharedPreferences.Editor mEditor;
private Fragment currFragment;
private GetAddressTask getAddressTask;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
this.getActionBar().setIcon(R.drawable.header_logo);
this.getActionBar().setTitle("");
dbHelper = new DbHelper(this);
q = new Queries(db, dbHelper);
imageLoader = ImageLoader.getInstance();
imageLoader.init(ImageLoaderConfiguration
.createDefault(getBaseContext()));
statusCallback = new SessionStatusCallback();
mTwitter = new TwitterApp(this, twitterAppListener);
mTitle = mDrawerTitle = "";
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
mPanelMenu = findViewById(R.id.panel_slidermenu);
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
mDrawerList.setDividerHeight(0);
updateMenuList();
// enabling action bar app icon and behaving it as toggle button
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_menu, // nav
// menu
// toggle
// icon
R.string.no_name, // nav drawer open - description for
// accessibility
R.string.no_name // nav drawer close - description for
// accessibility
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
TypedValue tv = new TypedValue();
if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
offsetY = TypedValue.complexToDimensionPixelSize(tv.data,
getResources().getDisplayMetrics());
}
if (!isShownSplash) {
isShownSplash = true;
this.getActionBar().hide();
FragmentManager fragmentManager = this.getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, new SplashFragment())
.commit();
}
else if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(1);
}
mUpdatesRequested = false;
// Open Shared Preferences
mPrefs = getSharedPreferences(LocationUtils.SHARED_PREFERENCES,
Context.MODE_PRIVATE);
// Get an editor
mEditor = mPrefs.edit();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API).addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
FrameLayout frameAds = (FrameLayout) findViewById(R.id.frameAds);
frameAds.setVisibility(View.GONE);
if (MGUtilities.hasConnection(this)) {
q.deleteTable("stores");
q.deleteTable("categories");
q.deleteTable("photos");
q.deleteTable("reviews");
q.deleteTable("ratings");
q.deleteTable("news");
}
}
public void showMainView() {
getActionBar().show();
displayView(1);
showAds();
}
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
updateMenuList();
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
// case R.id.action_settings:
// return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public boolean onCreateOptionsMenu(android.view.Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
@Override
public boolean onPrepareOptionsMenu(android.view.Menu menu) {
// if nav drawer is opened, hide the action items
// boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
// menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
private void displayView(int position) {
// clear back stack
FragmentManager fm = this.getSupportFragmentManager();
for (int i = 0; i < fm.getBackStackEntryCount(); ++i) {
fm.popBackStackImmediate(null,
FragmentManager.POP_BACK_STACK_INCLUSIVE);
}
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 1:
fragment = new HomeFragment();
break;
case 2:
fragment = new CategoryFragment();
break;
case 3:
fragment = new FavoriteFragment();
break;
case 4:
fragment = new FeaturedFragment();
break;
case 5:
fragment = new MapFragment();
break;
case 6:
fragment = new SearchFragment();
break;
case 7:
fragment = new NewsFragment();
break;
case 8:
fragment = new WeatherFragment();
break;
case 10:
fragment = new AboutUsFragment();
break;
case 11:
fragment = new TermsConditionFragment();
break;
case 13:
UserAccessSession session = UserAccessSession.getInstance(this);
if (session.getUserSession() == null) {
Intent i = new Intent(MainActivity.this, RegisterActivity.class);
startActivity(i);
} else {
Intent i = new Intent(this, ProfileActivity.class);
startActivity(i);
}
break;
case 14:
Intent i = new Intent(this, LoginActivity.class);
this.startActivity(i);
break;
default:
break;
}
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
// setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mPanelMenu);
if (currFragment != null && fragment != null) {
boolean result = fragment.getClass()
.equals(currFragment.getClass());
if (result)
return;
}
if (fragment != null) {
if (fragment instanceof MapFragment) {
currFragment = fragment;
Handler h = new Handler();
h.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
FragmentManager fragmentManager = MainActivity.this
.getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, currFragment)
.commit();
}
}, Config.DELAY_SHOW_ANIMATION + 200);
} else {
currFragment = fragment;
FragmentManager fragmentManager = this
.getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
}
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().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);
}
public void updateMenuList() {
UserAccessSession accessSession = UserAccessSession.getInstance(this);
UserSession userSession = accessSession.getUserSession();
if (userSession == null) {
MENUS = UIConfig.MENUS_NOT_LOGGED;
} else {
MENUS = UIConfig.MENUS_LOGGED;
}
showList();
}
public void showList() {
MGListAdapter adapter = new MGListAdapter(this, MENUS.length,
R.layout.menu_entry);
adapter.setOnMGListAdapterAdapterListener(new OnMGListAdapterAdapterListener() {
@Override
public void OnMGListAdapterAdapterCreated(MGListAdapter adapter,
View v, int position, ViewGroup viewGroup) {
// TODO Auto-generated method stub
FrameLayout frameCategory = (FrameLayout) v
.findViewById(R.id.frameCategory);
View frameHeader = v.findViewById(R.id.frameHeader);
frameCategory.setVisibility(View.GONE);
frameHeader.setVisibility(View.GONE);
Menu menu = MENUS[position];
if (menu.getHeaderType() == HeaderType.HeaderType_CATEGORY) {
frameCategory.setVisibility(View.VISIBLE);
Spanned title = Html.fromHtml(MainActivity.this
.getResources().getString(menu.getMenuResTitle()));
TextView tvTitle = (TextView) v.findViewById(R.id.tvTitle);
tvTitle.setText(title);
ImageView imgViewIcon = (ImageView) v
.findViewById(R.id.imgViewIcon);
imgViewIcon.setImageResource(menu.getMenuResIconSelected());
} else {
frameHeader.setVisibility(View.VISIBLE);
Spanned title = Html.fromHtml(MainActivity.this
.getResources().getString(menu.getMenuResTitle()));
TextView tvTitleHeader = (TextView) v
.findViewById(R.id.tvTitleHeader);
tvTitleHeader.setText(title);
}
}
});
mDrawerList.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
下面是適配器代碼
public class MGListAdapter extends BaseAdapter {
Context c;
private int count;
private int resId;
OnMGListAdapterAdapterListener mCallback;
@SuppressWarnings("unused")
private int mLastPosition = 1;
public interface OnMGListAdapterAdapterListener {
public void OnMGListAdapterAdapterCreated(MGListAdapter
adapter, View v, int position, ViewGroup viewGroup);
}
public void setOnMGListAdapterAdapterListener(OnMGListAdapterAdapterListener listener) {
try {
mCallback = (OnMGListAdapterAdapterListener) listener;
} catch (ClassCastException e) {
throw new ClassCastException(this.toString() + " must implement OnMGListAdapterAdapterListener");
}
}
public MGListAdapter(Context c, int count, int resId) {
this.c = c;
this.count = count;
this.resId = resId;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return count;
}
@Override
public Object getItem(int pos) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int pos) {
// TODO Auto-generated method stub
return pos;
}
@Override
public View getView(int pos, View v, ViewGroup viewGroup) {
// TODO Auto-generated method stub
ViewHolder viewHolder = null;
if(v == null) {
LayoutInflater li = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = li.inflate(resId, null);
viewHolder = new ViewHolder();
viewHolder.view = v;
v.setTag(viewHolder);
}
else {
viewHolder = (ViewHolder) v.getTag();
Log.w("MGListAdapter Class", "View being reused.");
}
if(mCallback != null)
mCallback.OnMGListAdapterAdapterCreated(this, viewHolder.view, pos, viewGroup);
return v;
}
public class ViewHolder {
public View view;
}
}
嗨，這只是一個警告，應用程序沒有崩潰在那一點 – Sheychan
是的，它沒有崩潰，但打開，關閉或上下滑動菜單時變得非常緩慢。 –
對於某些設備而言是如此。導航預先定義其動畫畢竟..所以較小的設備規格更多的負擔 – Sheychan