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refactor: MainActivity: move mPager and mTabs to local

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* while we are at it, move FragmentStateAdaptor to local too.
This commit is contained in:
Peter Cai 2021-03-13 16:27:05 +08:00
parent ff91bf42ef
commit 830ddd40b8
1 changed files with 21 additions and 31 deletions
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52
app/src/main/java/net/typeblog/shelter/ui/MainActivity.java
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@ -64,10 +64,6 @@ public class MainActivity extends AppCompatActivity {
private IShelterService mServiceMain = null;
private IShelterService mServiceWork = null;
// Views
private ViewPager2 mPager = null;
private TabLayout mTabs = null;
// Show all applications or not
// default to false
boolean mShowAll = false;
@ -207,17 +203,34 @@ public class MainActivity extends AppCompatActivity {
private void buildView() {
// Finally we can build the view
// Find all the views
mPager = findViewById(R.id.main_pager);
mTabs = findViewById(R.id.main_tablayout);
ViewPager2 pager = findViewById(R.id.main_pager);
TabLayout tabs = findViewById(R.id.main_tablayout);
// Initialize the ViewPager and the tab
// All the remaining work will be done in the fragments
mPager.setAdapter(new AppListFragmentStateAdapter());
pager.setAdapter(new FragmentStateAdapter(this) {
@NonNull
@Override
public Fragment createFragment(int position) {
if (position == 0) {
return AppListFragment.newInstance(mServiceMain, false);
} else if (position == 1) {
return AppListFragment.newInstance(mServiceWork, true);
} else {
return null;
}
}
@Override
public int getItemCount() {
return 2;
}
});
String[] pageTitles = new String[]{
getString(R.string.fragment_profile_main),
getString(R.string.fragment_profile_work)
};
new TabLayoutMediator(mTabs, mPager, (tab, position) ->
new TabLayoutMediator(tabs, pager, (tab, position) ->
tab.setText(pageTitles[position])).attach();
}
@ -515,27 +528,4 @@ public class MainActivity extends AppCompatActivity {
super.onActivityResult(requestCode, resultCode, data);
}
}
private class AppListFragmentStateAdapter extends FragmentStateAdapter {
AppListFragmentStateAdapter() {
super(MainActivity.this);
}
@NonNull
@Override
public Fragment createFragment(int position) {
if (position == 0) {
return AppListFragment.newInstance(mServiceMain, false);
} else if (position == 1) {
return AppListFragment.newInstance(mServiceWork, true);
} else {
return null;
}
}
@Override
public int getItemCount() {
return 2;
}
}
}