I am testing out the FragmentPagerAdapter and I had it all in a single class before. And everything worked, but once I separated SectionsPagerAdapter class, the getString doesn't work under the getPageTitle function.
I know getPageTitle is part of the PagerAdapter class, but I want to know what the best way to have that function included in this class. Do I need to extend the class?
SectionsPageAdapter class
import java.util.Locale;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
// A FragmentPagerAdapter that returns a fragment corresponding to one of the sections/tabs/pages.
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.myFriendsTab).toUpperCase(l);
case 1:
return getString(R.string.myDealsTab).toUpperCase(l);
case 2:
return getString(R.string.featuredDealsTab).toUpperCase(l);
case 3:
return getString(R.string.browseCategoriesTab).toUpperCase(l);
case 4:
return getString(R.string.localDealsTab).toUpperCase(l);
}
return null;
}
@Override
public int getCount() {
// Show 5 total pages.
return 5;
}
}
MainActivity class
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;
public class MainActivity extends FragmentActivity {
// Fragment PagerAdapter keeps every loaded fragment in memory.
// If too memory intensive, switch to FragmentStatePagerAdapter.
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager; // ViewPager that will host section contents.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Creates the adapter that will return a fragment for each of the primary sections.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), null);
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
getString(int)
only works for Classes that have access to a Context
- Fragments
, Activities
, etc.
Given that this an Adapter
class, it won't have direct access to a Context
, so you should probably pass one in with the constructor.
private Context mContext = null;
public SectionsPagerAdapter(FragmentManager fm, Context context) {
super(fm);
mContext = context;
}
and then use the member field to access getString(int)
return mContext.getString(R.string.myFriendsTab).toUpperCase(1);