[postlink]
https://the-best-way-of-life-is-islam.blogspot.com/2015/07/can-i-add-protected-void-onresume-to.html
[/postlink]
In AppCompatActivity , I can add the code protected void onResume() to launch some function when UI is shown or restored.
Now I created a Tabbed Activity, I add the code protected void onResume() to PlaceholderFragmentOld class , and I hope the system do someting when the UI cleanup_delete_fragment_old is shown, but the system crash and return the following error.
android.support.v4.app.SuperNotCalledException: Fragment PlaceholderFragmentOld{40e55078 #0 id=0x7f0f0070 android:switcher:2131689584:0} did not call through to super.onResume()
PlaceholderFragmentOld.java
public class PlaceholderFragmentOld extends Fragment {
private AdView adView;
private SMSRange mSmsRange;
private View mView;
private Context mContext;
private Spinner spinnerRanger;
private CheckBox chIsWriteLog;
public PlaceholderFragmentOld() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.cleanup_delete_fragment_old, container, false);
mView=rootView;
mContext=rootView.getContext();
return rootView;
}
@Override
protected void onResume() {
DoSometing();
}
}
CleanupDelete.java
public class CleanupDelete extends ActionBarActivity implements ActionBar.TabListener {
SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cleanup_delete);
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
Fragment fragment;
switch(position){
case 0:
fragment = new PlaceholderFragmentOld();
break;
case 1:
fragment = new PlaceholderFragmentReduce();
break;
case 2:
fragment = new PlaceholderFragmentTrim();
break;
case 3:
fragment = new PlaceholderFragmentPerson();
break;
default:
throw new IllegalArgumentException("Invalid section number");
}
return fragment;
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.Tab_Old);
case 1:
return getString(R.string.Tab_Reduce);
case 2:
return getString(R.string.Tab_Trim);
case 3:
return getString(R.string.Tab_Person);
}
return null;
}
}
}
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