我正在尝试使用SherlockFragment创建一个片段,从导航抽屉活动中选择以显示选项卡式片段。我的主要活动如下:
package com.impact.main;
import com.impact.main.R;
import com.impact.adapters.NavDrawerListAdapter;
import com.impact.helper.SQLiteHandler;
import com.impact.helper.SessionManager;
import com.impact.helper.dbTables;
import com.impact.model.NavDrawerItem;
import java.util.ArrayList;
import com.actionbarsherlock.app.SherlockFragment;
import com.google.android.gms.gcm.GoogleCloudMessaging;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends FragmentActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
private com.impact.helper.SQLiteHandler db;
private com.impact.helper.SessionManager session;
GoogleCloudMessaging gcm;
Context context;
String[] title;
Menu menu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// SqLite database handler
db = new com.impact.helper.SQLiteHandler(getApplicationContext());
// session manager
session = new SessionManager(getApplicationContext());
if (!session.isLoggedIn()) {
logoutUser();
}
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
//get length of menu list
String storedStaffId = SQLiteHandler.getUser(getApplicationContext(), "staffid");
int length = getResources().getStringArray(R.array.nav_drawer_items).length;
int projectsCount = db.getRowCount(dbTables.TABLE_PROJECTS,
"INNER JOIN projectstaff AS p ON p.projectid=projects.projectid WHERE staffid=" + storedStaffId);
// adding nav drawer items to array
for(int i=0; i<length; i++){
if(i == 1 ){
//add menu item with user project count
navDrawerItems.add(new NavDrawerItem(navMenuTitles[i], navMenuIcons.getResourceId(i, -1), true, ""+projectsCount));
}else{
navDrawerItems.add(new NavDrawerItem(navMenuTitles[i], navMenuIcons.getResourceId(i, -1)));
}
}
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(), navDrawerItems);
mDrawerList.setAdapter(adapter);
// 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_drawer, //nav menu toggle icon
R.string.app_name
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle("");
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(0);
}
}
/**
* Slide menu item click listener
* */
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 onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.logout:
logoutUser();
return true;
case R.id.unlink:
Toast.makeText(getApplicationContext(), "No Data Connection \nOperating in offline mode", Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* *
* Called when invalidateOptionsMenu() is triggered
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
boolean isOnline = SessionManager.isOnline(getApplicationContext());
if(isOnline == false){
menu.findItem(R.id.unlink).setVisible(true);
}else{
menu.findItem(R.id.unlink).setVisible(false);
}
menu.findItem(R.id.logout).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
SherlockFragment fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = new ProjectsFragment();
break;
case 2:
fragment = new WorkListFragment();
break;
case 3:
fragment = new ChangeControlFragment();
break;
case 4:
fragment = new CostControlFragment();
break;
case 5:
fragment = new MeetingsFragment();
break;
case 6:
fragment = new ActionsFragment();
break;
case 7:
fragment = new PerformanceFragment();
break;
case 8:
fragment = new DocumentsFragment();
break;
case 9:
fragment = new ReportsFragment();
break;
case 10:
fragment = new ProjectAdminFragment();
break;
case 11:
fragment = new SystemAdminFragment();
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
SherlockFragment sherfragment = new SherlockFragment();
fragmentTransaction.replace(R.id.frame_container, sherfragment);
fragmentTransaction.commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
@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);
}
/**
* Logging out the user. Will set isLoggedIn flag to false in shared
* preferences Clears the user data from sqlite users table
* */
public void logoutUser() {
// notifies user
//GCMIntentService.generateNotification(getApplicationContext(), "Logged out");
session.setLogin(false);
db.emptyTable("login");
// Launching the login activity
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
}
大多数片段都是这样构建的
package com.impact.main;
import com.actionbarsherlock.app.SherlockFragment;
import com.impact.main.R;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class HomeFragment extends SherlockFragment {
public HomeFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
return rootView;
}
}
选择菜单项时出现问题,我收到以下错误
java.lang.NoClassDefFoundError: com.main.impact.HomeFragment
这对我来说有点新鲜,所以我不确定还有什么要包含,不用说我会更新问题,如果需要的话。提前谢谢。
答案 0 :(得分:0)
首先,非常感谢帮助我解决这个问题的所有人。我设法将此错误排序。
问题在于使用SherlockFragment。我只是更改了我的片段以扩展android.support.v4.app.Fragment
并在我的主要活动中对displayView
进行了以下更改
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.frame_container, fragment);
fragmentTransaction.commit();
...