android - how to use toolbar(humburger icon) as backstack navigation -

-

i have navigate fragment mainactivity , if have more 1 fragment in activity, need navigate 1 one using toolbar(humburger icon).

enter image description here

in fragment hosting toolbar, call activity backpress:

@override     public boolean onoptionsitemselected(menuitem item) {         switch (item.getitemid()) {             case android.r.id.home:                 getactivity().onbackpressed();                 break;         }          return true;     }

to change icon arrow, in fragment:

        actionbar actionbar = getactivity().getsupportactionbar();         if (actionbar != null) {             // loading arrow drawable.             final drawable uparrow = getresources().getdrawable(r.drawable.abc_ic_ab_back_mtrl_am_alpha); // should work             actionbar.sethomeasupindicator(uparrow);             actionbar.setdisplayhomeasupenabled(true);             actionbar.sethomebuttonenabled(true);         }

Comments

Post a Comment

Popular posts from this blog

Lists in Python -

-
i noticed can multiply list scalar behavior weird if multiply: [2,3,4] * 3 i get: [2,3,4,2,3,4,2,3,4 ] understand results it's for? there other weird operations that? the main purpose of operand initialisation. example, if want initialize list 20 equal numbers can using loop: arr=[] in range(20): arr.append(3) an alternative way using operator: arr = [3] * 20 more weird , normal list operation on lists can find here http://www.discoversdk.com/knowledge-base/using-lists-in-python
Read more

android - can not access to progress bar in an other activity -

-
i have objects in layout video view,text view , on comes this: <?xml version="1.0" encoding="utf-8"?> <android.support.v7.widget.cardview android:id="@+id/cardview_mypost" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginbottom="@dimen/activity_vertical_margin" app:cardcornerradius="@dimen/activity_vertical_margin" app:cardelevation="@dimen/activity_vertical_margin" xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@color/web_withe_color" android:animatelayoutchanges="@anim/anim_list" android:padding="8dp" > <!-- thu...
Read more

html - Not able to access next element of an array javascript -

-
i new js, trying access next element of array using onclick function no luck. var i, len; function quiz() { var quiz_questions = [ "who founder of facebook?", "who founder of google?" ]; len = quiz_questions.length; for(i = 0; < len; i++) { document.getelementbyid("demo").innerhtml = quiz_questions[i]; } } <button onclick="quiz();">click</button> <p id="demo"></p> can explain me did wrong here. your problem is, iterate through every question, every time click. remove loop , put i++ after setting question. maybe checking, if less array length before it, wouldnt bad idea. var i, len; = 0; function quiz() { var quiz_questions = [ "who founder of facebook?", "who founder of google?" ]; len = quiz_questions.length; document.gete...
Read more