android - FAB animation with viewpager/tabslider -

-

i'm trying find way achieve such effect https://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0b6okdz75tqqsvlhxngjcnteznfu/components-buttons-fab-behavior_04_xhdpi_009.webm

i'm using android.support.v4.view.viewpager

i appreciate hints ,

first, need have layout floating action button anchored viewpager:

<android.support.design.widget.coordinatorlayout     android:id="@+id/main_content"     android:layout_width="match_parent"     android:layout_height="match_parent">      <android.support.design.widget.appbarlayout         android:id="@+id/appbar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:theme="@style/themeoverlay.appcompat.dark.actionbar">          <android.support.v7.widget.toolbar             android:id="@+id/action_bar"             android:layout_width="match_parent"             android:layout_height="?attr/actionbarsize"             android:background="?attr/colorprimary"             app:layout_scrollflags="scroll|enteralways"             app:popuptheme="@style/themeoverlay.appcompat.light"/>          <android.support.design.widget.tablayout             android:id="@+id/tabs"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:background="@android:color/white"             app:tabgravity="center"             app:tabindicatorcolor="?attr/coloraccent"             app:tabmode="scrollable"             app:tabselectedtextcolor="?attr/coloraccent"             app:tabtextcolor="@android:color/black" />      </android.support.design.widget.appbarlayout>      <android.support.v4.view.viewpager         android:id="@+id/viewpager"         android:layout_width="match_parent"         android:layout_height="match_parent"         app:layout_behavior="@string/appbar_scrolling_view_behavior" />       <android.support.design.widget.floatingactionbutton             android:id="@+id/fab"             app:layout_anchor="@id/viewpager"             app:layout_anchorgravity="bottom|right|end"             android:layout_width="56dp"             android:layout_height="56dp"             android:src="@drawable/ic_add_white"             app:borderwidth="@dimen/fab_border_width"             app:fabsize="normal" />  </android.support.design.widget.coordinatorlayout>

now have fab anchored viewpager (note: i've tried on fragment tab in viewpager; not seem behave properly), add onpagechangelistener viewpager so:

 viewpager.addonpagechangelistener(new viewpager.onpagechangelistener() {         @override         public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {         }          @override         public void onpageselected(int position) {              switch (position) {                 case index_of_tab_with_fab:                     fab.show();                     break;                  default:                     fab.hide();                     break;             }         }          @override         public void onpagescrollstatechanged(int state) {          }     });

the animations "pop" , "shrink" upon switching tabs handled automatically new version of support library.


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile:
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo
Read more