In my navigation drawer I have to selections: 1)Laptop 2)Desktop
How can I open another fragment when I click on Desktop? Sorry, I am new in Android Programming
I have also visited the other questions about this in stackoverflow, but they still do not work
Thanks
public void onNavigationDrawerItemSelected(int position) {
FragmentTransaction transaction = getFragmentManager().beginTransaction();
switch (position){
case 0:
fragment = new FragmentLaptop();
break;
case 1:
fragment = new FragmentDesktop();
break;
}
transaction
.replace(R.id.container, fragment)
.commit();
}
onNavigationDrawerItemSelected(position)needs to be called in onItemClick(...) where you have the listener of the list
like this:
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
onNavigationDrawerItemSelected(position);
}
Related
I currently have a navigation drawer, which has a few fragments (Home, Help, About) in my activity. On startup it opens up Home. The issue i'm having is that when i go to another fragment such as Help and then proceed to put the phone to sleep and subsequently turn on the phone back on it'll always return to Home instead of help.
I'm quite new to lifecycles but was hoping to get some feedback on how to resume from a different fragment.
EDIT: Provided relevant code
Update: Realised that this happens because i reinit the views on resume.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initializeUI();
}
private void initializeUI() {
fragAbout = new About();
fragHelp = new Help();
fragHome = new MyViewPager();
// Adding fragments to activity
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(R.id.main_activity_fraglayout, fragHome);
transaction.commit();
...
}
private void addDrawerItems() {
...
DrawerItemAdapter drawerAdapter = new DrawerItemAdapter(this, R.layout.nav_list_row, drawerItems);
mDrawerList.setAdapter(drawerAdapter);
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
...
newFragOnClick(fragHome, "Home");
break;
case 1:
...
newFragOnClick(fragSettings, "Help");
break;
case 2:
...
newFragOnClick(fragAbout, "About");
break;
default:
break;
}
}
});
}
private void newFragOnClick(Fragment frag, String actionBarTitle){
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_activity_fraglayout, frag);
transaction.commit();
}
Use sharedpreferences to save the current tab position and in onResume() use it to move to the saved position.
i want call simple Android Activity On click of Slider Menu Item, on place of fragment.
i tried to called activity using fragment but it shows nothing
please help me.
can anyone suggest alternate way rather than this ?
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 0:
Log.e("", "In Fragment "+position);
fragment = new About_us_Activity();
//startActivity(new Intent(this,Home_Activity.class));
break;
case 1:
//fragment = new About_us_frag();
Log.e("", "In Fragment "+position);
break;
case 2:
Log.e("", "In Fragment "+position);
fragment = new About_us_frag1();
break;
default:
break;
}
if (fragment != null) {
Log.e("", "In Fragment");
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
// update selected item and title, then close the drawer
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
First of all apply onItemClickListener to your drawer list.
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mDrawerLayout.closeDrawers();
displayView(position);
}
});
In your DisplayView method:
private void displayView(int position) {
switch (position) {
case 1:
Intent intent = new Intent(getApplicationContext(), MyActivity1.class);
startActivity(intent);
break;
case 2:
Intent intent1 = new Intent(getApplicationContext(),MyActivity2.class);
startActivity(intent1);
break;
default:break;
}
}
MyActivity1 and MyActivity2 are activities. you can try this method , it worked for me.
I still dont seem to get this State Loss error when commiting a fragment. I have a ListView with this OnClickListener:
public void onListItemClick(ListView l, View v, int position, long id) {
switch (position) {
case 0:
fragmentTabActivity.addFragments(MainTabHostActivity.getTabNames()[0], new OpenerLocationListFragment(), true);
break;
}
}
And this is my addFragments Method:
public void addFragments(String tabName, Fragment fragment, boolean add) {
if (add) {
hMapTabs.get(tabName).add(fragment);
}
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.replace(android.R.id.tabcontent, fragment);
ft.commit();
}
How can it lose his state in this short time frame? I can understand why it happens in Asynctasks but what should i do different here (other than allowing the state loss)? Has anybody suggestions?
I am implementing navigation drawer and works well. So i am calling fragment on navigation drawer click and it is also working and further more i am calling another fragment from Home page fragment and maintain the back stack for every fragment but the problem is back press from the child fragment i can't go to Home page fragment and just exited from application. I don't want this. What i want Click on
Navigation Drawer->HomePageFragment->AnotherChild Fragment(On List Item click of HomePageFragment)
but on back pressed without going to Homepage fragment its directly exit with application. Here is my code: (In Fragment Activity with Navigation Drawer)
class SlideitemListener implements ListView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
updateDisplay(position);
}
}
private void updateDisplay(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new ScheduleFragment();
break;
case 1:
fragment = new Result_Fragment();
break;
case 2:
fragment = new Live_Match_Fragment();
break;
case 3:
// fragment = new Live_Match_Fragment();
break;
case 4:
fragment = new Team_Fragment();
break;
default:
break;
}
if (fragment != null) {
fragmentManager = getFragmentManager();
fragmentManager.popBackStackImmediate("0", 0);
int count = fragmentManager.getBackStackEntryCount();
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction.replace(R.id.frame_container, fragment)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(String.valueOf(count)).commit();
Log.e("Count in Activiy", ""+count);
// update selected item and title, then close the drawer
setTitle(menutitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
Now in BackPressed() in FragmentActivity.
#Override
public void onBackPressed() {
if (fragmentManager.getBackStackEntryCount() <= 1) {
finish();
return;
}
super.onBackPressed();
}
Now calling another child fragment from HomePage fragment on Listview item click.
team_lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
TeamDetailFragment myDetailFragment = new TeamDetailFragment();
FragmentManager fragmentManager = getFragmentManager();
int count = fragmentManager.getBackStackEntryCount();
Log.e("Count in Fragment", "" + count);
FragmentTransaction fragmentTransaction = fragmentManager
.beginTransaction();
fragmentTransaction
.replace(R.id.frame_container, myDetailFragment)
.setTransition(
FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(String.valueOf(count)).commit();
}
});
So anybody knows then help me. Help will be appreciate.
There is an issue with nested fragments in android
https://code.google.com/p/android/issues/detail?id=40323
Android doesn't handle back press well if transactions were in nested fragments.
To surpass this i am using the following fix inside My Activity
#Override
public void onBackPressed() {
// If the fragment exists and has some back-stack entry
if (myFragment != null && myFragment.getChildFragmentManager().getBackStackEntryCount() > 0) {
// Get the fragment fragment manager - and pop the backstack
myFragment.getChildFragmentManager().popBackStack();
}
// Else, nothing in the direct fragment back stack
else {
// Let super handle the back press
super.onBackPressed();
}
}
I've solved in the following way:
1st solution
#Override
public void onBackPressed() {
FragmentManager fragmentManager = getFragmentManager();
int backCount = fragmentManager.getBackStackEntryCount();
if(backCount > 1) {
super.onBackPressed();
} else {
finish();
}
}
2nd solution
#Override
public void onBackStackChanged() {
FragmentManager fragmentManager = getFragmentManager();
int backCount = fragmentManager.getBackStackEntryCount();
if(backCount == 0) {
finish();
}
}
These allow you to exploit the Android stack when you replace your fragment:
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, yourFragment)
.addToBackStack(null).commit();
When you press back button inside your fragment onBackPressed() method of your activity will be called if you have declared that..So handling back button for fragments within navigation drawer can be one in this way..
MainActvity
public static boolean isMainActivityShown ;
public static boolean isFragment1Shown=false ;
public static boolean isFragment2Shown=false ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
isMainActivityShown=true //inside onCreate method put isMainActivityShown true
.
.
.
{
Fragment currentFragment = new Fragment1();
isMainActivityShown=false; //when moving to fragment1
isFragment1Shown=true;
frgManager = getFragmentManager();
frgManager.beginTransaction().replace(R.id.content_frame, currentFragment)
.commit();
}
.
.
}
#Override
public void onBackPressed() {
if(isMainActivityShown)
{
finish();
}
else if(isFragment1Shown)
{
//write the code to handle back button when you are in Fragment1
}
else if(isFragment2Shown)
{ //When you are in Fragment 2 pressing back button will move to fragment1
Fragment currentFragment = new Fragment1();
isFragment2Shown=false;
isFragment1Shown=true;
FragmentManager frgManager;
frgManager = getFragmentManager();
frgManager.beginTransaction().replace(R.id.content_frame, currentFragment)
.commit();
}
}
Fragment1
Fragment currentFragment = new Fragment2();
MainActivity.isFragment1Shown=false;
MainActivity.isFragment2Shown=true;
frgManager = getFragmentManager();
frgManager.beginTransaction().replace(R.id.content_frame, currentFragment)
.commit();
Now you can replace finish() for fragmentManager.popBackStack(), method of android.support.v4.app.FragmentManager
I was working my way through the NavigationDrawer sample code from developer.android.com and tried to implement it as navigation for one of my apps. However, I came across a problem when it came to switching fragments in the main window, as the sample code reuses the same fragment and just switches out an imageview. Here is the code from the sample:
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 = getFragmentManager();
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);
}
where PlanetFragment is a generic fragment with only an imageview and no functionality, which does not apply for my app. So, instead, I tried and replaced the first block of the selectItem method with a case/switch:
public void selectItem(int position){
Fragment fragment;
switch(position){
case 1: fragment = new Fragmentscreentest(); break;
case 2: fragment = new Fragmentstatusbar(); break;
case 3: fragment = new Fragmentfullscreen(); break;
default: fragment = new Fragmentscreentest(); break;
}
FragmentManager fragmentManager = getFragmentManager();
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);
}
and added the same empty constuctor to my Fragments as the PlanetFragment has:
public Fragmentstatus() {
// Empty constructor required for fragment subclasses
}
It doesn't work, whenever I open up the app, it only shows the app icon and the title in the actionbar, no content, no actions on the actionbar, no navigation drawer, nothing and then it crashes after about a second. With the original code it works and shows everything, but that only works for one fragment.
How can I actually switch Fragments in the NavigationDrawer?
Take a look at my code:
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) {
switch (position) {
case 0:
fragmentManager.beginTransaction()
.replace(R.id.content_frame, new MainActivityFragment())
.commit();
break;
case 1:
fragmentManager.beginTransaction()
.replace(R.id.content_frame, new DbListViewFragment())
.commit();
break;
case 2:
fragmentManager.beginTransaction()
.replace(R.id.content_frame, new StatisticsFragment())
.commit();
break;
case 3:
fragmentManager.beginTransaction()
.replace(R.id.content_frame, new CalculatorFragment(), "calculator")
.commit();
break;
}
I am using a switch-case. position 0 is the very first item in my ListView inside the drawer.
Taken from my answer on this question: DrawerLayout on click disabled after first event
EDIT:
If you want to select one Fragment at start you can do it like this at the end of your onCreate method:
if (savedInstanceState == null) {
selectItem(0);
}
0 being the position of your desired Fragment