Activity is not assigned to Android.app.Activity Manifest XML
I’m having some issues with fragments in Android Studio. So basically this is my MainActivity:
public class MainActivity extends FragmentActivity {
final Context context = this;
ViewPager Tab;
TabPagerAdapter TabAdapter;
ActionBar actionBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TabAdapter = new TabPagerAdapter(getSupportFragmentManager());
Tab = (ViewPager) findViewById(R.id.pager);
Tab.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar = getActionBar();
actionBar.setSelectedNavigationItem(position);
}
});
Tab.setAdapter(TabAdapter);
actionBar = getActionBar();
Enable Tabs on Action Bar
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
@Override
public void onTabReselected(android.app.ActionBar.Tab tab,
android.app.FragmentTransaction ft) {
}
@Override
public void onTabSelected(android.app.ActionBar.Tab tab,
android.app.FragmentTransaction ft) {
on tab selected show respected fragment view
Tab.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(android.app.ActionBar.Tab tab,
android.app.FragmentTransaction ft) {
}
};
Add New Tab
actionBar.addTab(actionBar.newTab().setText("Feedback")
.setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("History Log")
.setTabListener(tabListener));
}
}
Then my other class is one of the tag codes :
public class FeedbackMain extends Fragment {
View feedbackMainView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
feedbackMainView = inflater.inflate(R.layout.activity_feedback_main,
container, false);
return feedbackMainView;
}
}
Then my list :
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=". MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=". FeedbackMain"
android:label="@string/title_activity_feedback_main" >
</activity>
However, I am in the . FeedbackMain receives a red line and the error message is:
. FeedbackMain is not assignable to 'android.app.Activity'
I wonder why this is the case? It works fine on Android dev tools, but that’s what happened when I switched to Android Studio.
Thanks in advance.
Edit
XML file for mainActivity:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Style .xml:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
</resources>
Solution
First, you simply declare the activity in the list file, not the fragment.
So remove this line from the list file
<activity
android:name=". FeedbackMain"
android:label="@string/title_activity_feedback_main" >
</activity>
Second, if you want to use ActionBar, your class should extend ActionBarActivity instead of FragmentActivity. So change your mainactivity from
public class MainActivity extends FragmentActivity {
to
public class MainActivity extends ActionBarActivity{
Then make sure to call getSupportActionBar()
if you are using the support library
Edit:
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
@Override
public void onTabReselected(
android.support.v7.app.ActionBar.Tab arg0,
FragmentTransaction arg1) {
TODO Auto-generated method stub
}
@Override
public void onTabSelected(
android.support.v7.app.ActionBar.Tab arg0,
FragmentTransaction arg1) {
TODO Auto-generated method stub
}
@Override
public void onTabUnselected(
android.support.v7.app.ActionBar.Tab arg0,
FragmentTransaction arg1) {
TODO Auto-generated method stub
}
};