Unable To Load Fragment From Activity

I am using Sherlock Fragments library to sliding menu.my problem is i unable to load fragment when i click button in activity. I am getting java.lang.classcastException to android.

Solution 1:

Fragment2 is a fragment not a Activity. Fragment is hosted by a Activity. The below is wrong

 Intent action=newIntent(v.getContext().getApplicationContext(),Fragment2.class);
 startActivity(action);

You are missing setContentView for the Activity.

publicclassAmecmainActivityextendsFragmentActivity {

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); // missing

Then

You need a Container in activity_main.xml

<FrameLayout 
      android:id="@+id/fragment_container" 
      android:layout_width="match_parent" 
      android:layout_height="200dp"
      android:background="?android:attr/detailsElementBackground" />

Then in onClick

FragmentManagerfragmentManager= getSupportFragmentManager();
FragmentTransactionfragmentTransaction= fragmentManager.beginTransaction();
Fragment2fragment=newFragment2();
fragmentTransaction.add(R.id.fragment_container, fragment);
fragmentTransaction.commit();

Edit:

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent" ><ImageButtonandroid:id="@+id/imageButton1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_centerHorizontal="true"android:src="@drawable/ic_launcher" /><FrameLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:layout_above="@+id/imageButton1"android:id="@+id/fragment_container"
       ></FrameLayout></RelativeLayout>

Solution 2:

You can't call Fragment Like this:

You have to use this:

voidaddfragment(Fragment fragment, boolean addBacktoStack, int transition) {
    FragmentTransactionft= getFragmentManager().beginTransaction();
    ft.replace(R.id.simple_fragment, fragment);
    ft.setTransition(transition);
    if (addBacktoStack)
        ft.addToBackStack(null);
    ft.commit();

}

And call this method like this:

addfragment(newFragment2(contextHere),true,FragmentTransaction.TRANSIT_FRAGMENT_OPEN);

Solution 3:

In the activity, the fragment can be loaded using;

FragmentManagerfragmentManager= getSupportFragmentManager();        
fragmentManager.beginTransaction()
               .replace(R.id.container_main, newMyFragment())
               .commit();

where MyFragment is as;

publicclassMyFragmentextendsandroid.support.v4.app.Fragment {


    publicMyFragment() {
        // Required empty public constructor
    }
@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewrootView= inflater.inflate(R.layout.fragment_whats_trending, container, false);
        return rootView;
    }
}

and a simple Fragment xml, would look like:

<RelativeLayout 
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools" 
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            android:paddingBottom="@dimen/activity_vertical_margin"
 tools:context="in.stocksphere.stocksphere.MyFragment$PlaceholderFragment" >

            <TextView android:text="@string/ta_user"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content" />

</RelativeLayout>