I am working on android Navigation Drawer and through their documentation it looks like, the drawer can only extend Fragment Activity, so that to open drawer from all my activities, I need to make all my activities a fragment, which is not a feasible solution.
Is there a way I can open a drawer that extends FragmentActivity from an Activity?
When I try to extend my drawer activity from Activity class, and another activity that will open the drawer extending the draweractivity class (here SlideMenuActivity), the app crashes giving NullPointerException.
Below is the code for opening a drawer layout but once the first activity launches, I am unable to access the drawer.
App is crashing on syncState point in onPostCreate method
@Override
protected void onPostCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onPostCreate(savedInstanceState);
getActionDrawerToggle().syncState();
}
public class SlideMenuActivity extends FragmentActivity implements OnItemClickListener
{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setDrawerLayout();
setDrawerList();
if (savedInstanceState == null)
{
getDrawerListView().setSelectionAfterHeaderView();
getDrawerListView().setSelection(1);
selectItem(1);
}
}
//
// @Override
// public void setContentView(int layoutResID) {
// // TODO Auto-generated method stub
// super.setContentView(layoutResID);
// }
private DrawerLayout getDrawerView()
{
return (DrawerLayout)findViewById(R.id.drawer_layout);
}
private ListView getDrawerListView()
{
return (ListView) findViewById(R.id.left_drawer);
}
private ActionBarDrawerToggle getActionDrawerToggle()
{
ActionBarDrawerToggle drawerToggle=new ActionBarDrawerToggle(
this, /* host Activity */
getDrawerView(), /* 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 */
) {
@Override
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
}
@Override
public void onDrawerOpened(View view) {
super.onDrawerOpened(view);
}
};
return drawerToggle;
}
private void setDrawerLayout(){
// set a custom shadow that overlays the main content when the drawer opens
getDrawerView().setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.RELATIVE_HORIZONTAL_GRAVITY_MASK);
// enable ActionBar app icon to behave as action to toggle navigation drawer
getDrawerView().setDrawerListener(getActionDrawerToggle());
}
/**
* Set up the drawer's list view with items and click listener
*/
private void setDrawerList()
{
ImageView imageView=new ImageView(this);
imageView.setImageDrawable(getResources().getDrawable(R.drawable.precision_logo));
CustomBaseAdapter adapter=new CustomBaseAdapter();
adapter.list=getListViewData();
adapter.context=this;
ListView drawerList=getDrawerListView();
drawerList.setHeaderDividersEnabled(true);
drawerList.addHeaderView(imageView, null, false);
drawerList.setScrollingCacheEnabled(false);
drawerList.setAdapter(adapter);
drawerList.setOnItemClickListener(this);
}
private void selectItem(int position){
// update the main content by replacing fragments
// Fragment fragment=null;
// FragmentManager manager=getSupportFragmentManager();
switch (position) {
case 1:
this.startActivity(new Intent(this,SavedTankListActivity.class));
// fragment = new SavedMixesFragment();
// fragment = new SavedTankListActivity();
// manager.beginTransaction().replace(R.id.content_frame, fragment).commit();
break;
case 2:
// fragment=new MixGuideFragment();
// manager.beginTransaction().replace(R.id.content_frame, fragment).commit();
break;
default:
// fragment = new SavedMixesFragment();
// manager.beginTransaction().replace(R.id.content_frame, fragment).commit();
break;
}
getDrawerView().closeDrawer(getDrawerListView());
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onPostCreate(savedInstanceState);
getActionDrawerToggle().syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// TODO Auto-generated method stub
super.onConfigurationChanged(newConfig);
getActionDrawerToggle().onConfigurationChanged(newConfig);
}
private ArrayList<DrawerListModel> getListViewData()
{
ArrayList<DrawerListModel> listViewData=new ArrayList<DrawerListModel>();
String[] listItemArray=getResources().getStringArray(R.array.slide_bar_list_item_array);
for(int index=0;index<listItemArray.length;index++)
{
DrawerListModel model=new DrawerListModel();
model.listItem=listItemArray[index];
listViewData.add(model);
}
return listViewData;
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id)
{
view.setSelected(true);
selectItem(position);
}
public void openDrawerList(View view){
getDrawerView().openDrawer(getDrawerListView());
}
}
