The Problem is in
methods: onTabSelected
, onTabUnSelected
and variables: cPlusPlusFragment
and javaFrag
(You did not Declared/Created them anywhere)
*Solution*
// The following variables are at Class level (data members)
String cPlusPlusFragment = "C++";
String javaFrag = "Java"
// Pass them in the method createTab accordingly
createTab(mActionBar, cPlusPlusFragment);
createTab(mActionBar, javaFrag);
// Modify you onTabSelected and onTabUnselected methods as follows:
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if (cPlusPlusFrag.equals(tab.getText().toString)) {
if (cPlusPlusFragment == null) {
cPlusPlusFragment = new CPlusPlusFragment();
// No need to Create custom FragmentTransaction, use
// one that is passed in the argument
ft.add(android.R.id.content, cPlusPlusFragment);
} else {
ft.attach(cPlusPlusFragment);
}
} else if (javaFrag.equals(tab.getText().toString)) {
if (javaFragment == null) {
javaFragment = new JavaFragment();
ft.add(android.R.id.content, javaFragment);
} else {
ft.attach(javaFragment);
}
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
Toast.makeText(this, tab.getText() + " Un-Selected", Toast.LENGTH_LONG)
.show();
if (cPlusPlusFrag.equals(tab.getText().toString)) {
ft.detach(cPlusPlusFragment);
} else if (javaFrag.equals(tab.getText().toString)) {
ft.detach(javaFragment);
}
}
I am 100 % sure that this will solve your problem :)