Develop Reference

Replace Fragment showing both fragments

There is problem with my fragment, they are showed together, one on the second fragment. How to disapear, and only show one of them?
Definiton:
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
fr = new avc);
FragmentTransaction ft = ((TestingActivity)context).getFragmentManager().beginTransaction();
ft.replace(R.id.test, fr);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();
}
});
And definiton of container below:
<FrameLayout
android:id="#+id/test"
android:layout_width="match_parent"
android:layout_height="match_parent" />

You can use some thing like this. Make a function for showing a fragment and call each time this function with different parameter.
eg. If You want to show "HomeFragment" then call displayView(0) and if you want to show "FindPeopleFragment" then call displayView(1)
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = new FindPeopleFragment();
break;
case 2:
fragment = new PhotosFragment();
break;
case 3:
fragment = new CommunityFragment();
break;
case 4:
fragment = new PagesFragment();
break;
case 5:
fragment = new WhatsHotFragment();
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).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");
}
}

Replacing fragments blocks the animation of the drawer

I've added a navigation drawer to my applicaton, it's one single activity that manage 3 fragments.
Now when I click in an item from the navigation drawer list, I get the position of selected item and I call the following method to display the selected fragment :
private void displayView(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = MapFragment.newInstance();
break;
case 2:
fragment = new NearbyFragment();
break;
default:
break;
}
if (fragment != null) {
replaceFragment(fragment);
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
}
and here is the replaceFragment() method :
private void replaceFragment(Fragment fragment) {
String backStateName = fragment.getClass().getName();
String fragmentTag = backStateName;
boolean fragmentPopped = mFragmentManager.popBackStackImmediate (backStateName, 0);
if (!fragmentPopped && mFragmentManager.findFragmentByTag(fragmentTag) == null){
//fragment not in back stack, create it.
FragmentTransaction ft = mFragmentManager.beginTransaction();
ft.replace(R.id.content_frame, fragment, fragmentTag);
//ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right);
ft.addToBackStack(backStateName);
ft.commit();
}
}
the problems:
when I click the home menu (case 0), the navigation closes with a smooth animation without any problems.
But when I select the map or nearby menu (case 1 and 2), the animation stops waiting for the fragment to load.
I want to use AsyncTask, to replace the fragment in a background thread but I don't know how
if only someone could explain to me what exactly should I do, or has a better idea it would be great.

When you implement your ActionBarDrawerToggle, the framework provides callbacks on close & open of the drawer:
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) {
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
/* replaceFragment() should be called here */
replaceFragment(fragment);
}
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
/* do nothing here */
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
So your displayView() method should look like this:
private void displayView(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = MapFragment.newInstance();
break;
case 2:
fragment = new NearbyFragment();
break;
default:
break;
}
if (fragment != null) {
//replaceFragment(fragment);
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
}
What I have done here is call replaceFragment() in the callback for drawer closed.
Try this. This should work.

Navigation drawer with activities instead of fragments

What i have is left navigation menu that i have made using navigation drawer and it works just fine with fragments , and i have five buttons each one open a fragment but now i want each case to open an activity instead of fragment , and i have tried to do it using intent but it didn't work !!
here is my code :
private void displayView(int position) {
// update the main content by replacing fragments
android.app.Fragment fragment = null;
switch (position) {
case 0:
//fragment = new HomeFragment();
// Intent i=new Intent(MainActivity.this,MainActivity.class);
// startActivity(i);
break;
case 1:
//fragment = new FindPeopleFragment();
break;
case 2:
//fragment = new PhotosFragment();
break;
case 3:
//fragment = new CommunityFragment();
break;
case 4:
//fragment = new PagesFragment();
break;
case 5:
//fragment = new WhatsHotFragment();
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).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");
}
}
So what shall i change in this code so it can open an activity instead of fragment??? can anyone help me?

You need to change your function to load a class Fragment in some case and in other cases a class Activity
case 0:
activity = new MyActivity();
fragment = null;
break;
case 1:
fragment = new MyFragment();
activity = null;
break;
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame_container, (android.app.Fragment) fragment).commit();
setTitle(menutitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}else {
if(activity != null) {
Intent i1 = new Intent(MainActivity.this, activity.getClass());
i1.putExtra(EXTRA_MESSAGE, position);
startActivity(i1);
setTitle(menutitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
}

Could you please post the Error from Logcat:
What i would check first is:
Are the Activities declared in the Manifest.xml as Activies?
Secondly check if you calling Activities with an Intent, and not Fragments
This is how you start Activities correctly.
Intent intent = new Intent(mActivity, class1); // class1 The class to open
startActivity(intent);

How can I able to call FragmentActivity containing viewpager with three tabs from Navigation Drawer Item?

This is one of the method() of Navigation Drawer activity...
Code Snippet:
/**
* Diplaying fragment view for selected nav drawer list item
**/
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 0:
fragment = new ViewFragment();
break;
case 1:
//here i should call the FragmentActivity
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// Log.e("MainActivity", "Error in creating fragment");
}
}

create intent with fragment activity and use startActivity() to launch the fragment Activity.
switch (position) {
case 0:
fragment = new ViewFragment();
break;
case 1:
//here i should call the FragmentActivity
Intent intent = new Intent(Context, FragmentActivity.class);
startActivity(intent);
default:
break;
}
But make sure that your FragmentActivity. In FragmentActivity you have to use fragment to display the content.

How do I replace the fragmentactivity in the code below?

/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
FragmentActivity fragment = null;
switch (position) {
case 0:
fragment = new HomeFragment();
break;
case 1:
fragment = new HomeFragment();//LessonPlanFragment();
break;
case 2:
fragment = new HomeFragment();//GradeBookFragment();
break;
case 3:
fragment = new HomeFragment();//StudentFragment();
break;
case 4:
fragment = new HomeFragment();//ReportsFragment();
break;
case 5:
fragment = new HomeFragment();//AppSettingsFragment();
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
android.app.FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.id.frame_container, fragment);
ft.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");
}
}
I have tried using the support library but nothing helped. The error message reads "het method replace(int, Fragment) in the type FragmentTransaction is not applicable for the arguments (int, FragmentActivity).

This won't work. You're trying to replace Fragment with FragmentActivity and this is impossible. You can only do that with Fragments. For clarification FragmetnActivity acts as host Activity for Fragments in support library.