CODEWITHSUNDEEP
androidandroid-layoutandroid-fragmentsandroid-support-library
hunterp
hunterp

Reputation: 15976

How to upgrade my Activities to Fragments and avoid ClassCastException?

I have quite a large hierarchy of classes that are Activities. I just installed the v4 compatibility package. What is the easiest way to get all my Activities in a way that I can use them in a Fragment with a TabHost inside of it?

Line of code: 

    mTabsAdapter.addTab(mTabHost.newTabSpec("feed").setIndicator("Feed"), FActivity.class, null);

Line 165:

@Override
    public Fragment getItem(int position) {
                TabInfo info = mTabs.get(position);
                return Fragment.instantiate(mContext, info.clss.getName(), info.args);
            }

Specifically I want to avoid errors like: 

07-19 01:33:24.940: ERROR/AndroidRuntime(17581): java.lang.ClassCastException: com.c.FActivity
07-19 01:33:24.940: ERROR/AndroidRuntime(17581):     at android.support.v4.app.Fragment.instantiate(Fragment.java:378)
07-19 01:33:24.940: ERROR/AndroidRuntime(17581):     at com.c.Main$TabsAdapter.getItem(Main.java:165)
07-19 01:33:24.940: ERROR/AndroidRuntime(17581):     at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:62)

Upvotes: 3

Views: 6140

Answers (1)

Egor
Egor

Reputation: 40193

Here are a few links that you might find interesting. There is an example of creating a two-activity application, and then implementing fragments into it.

Android User Interface Design: Working With Fragments

Android Compatibility: Working with Fragments

Hope this helps.

Upvotes: 6

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