Android Eclipse to Android Studio -

i'm moving app minsdk 8 targetsdk 19 built in eclipse minsdk 14 targetsdk 22 built in android studio, since announcement of withdrawal of eclipse support.

rather allowing android studio perform conversion, wanted create new project , manually port code over.

i'm stuck.

i have main activity extends appcompatactivity , uses navigation drawer , toolbar, works fine. fragment loads ok too, until try reference toolbar.

my main activity code is:

public class mainactivity extends appcompatactivity implements blanktestfragment.onfragmentinteractionlistener { private toolbar toolbar;   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      toolbar = (toolbar) findviewbyid(r.id.tool_bar);     setsupportactionbar(toolbar);     ...     ... 

my loaded fragment code is:

public class blanktestfragment extends fragment { ... private toolbar toolbar; ... public static blanktestfragment newinstance(string param1, string param2) {     blanktestfragment fragment = new blanktestfragment();     bundle args = new bundle();     args.putstring(arg_param1, param1);     args.putstring(arg_param2, param2);     fragment.setarguments(args);     return fragment; }  public blanktestfragment() {     // required empty public constructor }  public final static string tag = blanktestfragment.class.getsimplename();  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     if (getarguments() != null) {         mparam1 = getarguments().getstring(arg_param1);         mparam2 = getarguments().getstring(arg_param2);     }     toolbar = ((appcompatactivity)getactivity()).getsupportactionbar();  } 

the last line reports:

incompatible types: required: android.support.v7.widget.toolbar found: android.support.v7.app.actionbar 

so, what's going wrong? actionbar reference coming from?

solution

in mainactivity added:

public static toolbar gettoolbar(){     return toolbar; } 

in test fragment, in onattach, added:

toolbar = mainactivity.gettoolbar(); toolbar.settitle("hello"); 

solution 2

it turns out small error in test fragment prevented original implementation working.

in mainactivity had set toolbar supportactionbar. when tried

toolbar = ((appcompatactivity)getactivity()).getsupportactionbar(); 

in fragment, had set toolbar be

private toolbar toolbar; 

but wasn't toolbar, changed to

private actionbar toolbar; 

and worked fine.

where actionbar reference coming from?

the return value of getsupportactionbar() instance of android.support.v7.app.actionbar, indicated in the javadocs. cannot assign toolbar field, toolbar not inherit actionbar.

under covers, setsupportactionbar() takes toolbar , wraps in object. not see easy way toolbar back. so, try work actionbar wrapper getsupportactionbar() returns.