What I want to do is to handle the scroll NestedScrollView.
But when I "setOnScrollChangedListener" to it, and then I scroll the view, nothing happens, the method "setOnScrollChangedListener" even isn't be called...
Who could tell me why? And when will the method "setOnScrollChangedListener" be called?
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/MyAppbar"
android:layout_width="match_parent"
android:layout_height="256dp"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapse_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:background="#color/material_deep_teal_500"
android:fitsSystemWindows="true">
<ImageView
android:id="#+id/bgheader"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:fitsSystemWindows="true"
android:background="#drawable/example"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/scroll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="fill_vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingTop="24dp">
<android.support.v7.widget.CardView
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#color/error_color"
android:textSize="20sp"
android:text="This text is part of first Cardview\n\n"/>
</LinearLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#color/abc_search_url_text"
android:text="This text is part of second Cardview\n\n"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
In MainActivity, I want to listen to the scroll. I did like this:
public class MainActivity extends AppCompatActivity {
private NestedScrollView nestedScrollView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nestedScrollView = (NestedScrollView) findViewById(R.id.scroll);
nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
#Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
System.out.println("I am scrolling the view...");
}
});
}
}
I tried the same code without
app:layout_behavior="#string/appbar_scrolling_view_behavior"
in the NestedScrollView and it worked for me. Give it a try
Related
I'm trying to make toolbar button to stay at the bottom when collapsingToolbarLayout is expanded and moves up and get pinned when the collapsingToolbarLayout is collapsed. The way it behave now is always pinned on top. Here is what I have:
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/col"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
android:fitsSystemWindows="true">
<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"
app:elevation="4dp"
android:transitionName="#string/pic_transition_name"
app:layout_collapseMode="parallax">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/clpsToolbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapsedTitleTextAppearance="#style/CollapsedText"
app:contentScrim="#color/colorPrimary"
app:expandedTitleTextAppearance="#style/ExpandedText"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="#+id/iv_gallery"
android:layout_width="match_parent"
android:layout_height="320dp"
android:layout_gravity="center_horizontal"
app:layout_collapseMode="parallax"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="center"
app:layout_collapseMode="pin"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<Button
android:id="#+id/mmv_toggle_detail"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="right"
/>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
The toggle button always stays on top place, I want it to behave similar to WhatsApp edit button in group detail when it moves up and down as you expand the toolbar layout.
Solved it by taking the button out of the toolbar and putting it a child of the CollapsingToolbarLayout with margin bottom and collapsing mode as pin
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/col"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
android:fitsSystemWindows="true">
<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"
app:elevation="4dp"
android:transitionName="#string/pic_transition_name"
app:layout_collapseMode="parallax">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/clpsToolbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapsedTitleTextAppearance="#style/CollapsedText"
app:contentScrim="#color/colorPrimary"
app:expandedTitleTextAppearance="#style/ExpandedText"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="#+id/iv_gallery"
android:layout_width="match_parent"
android:layout_height="320dp"
android:layout_gravity="center_horizontal"
app:layout_collapseMode="parallax"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="center"
app:layout_collapseMode="pin"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
</android.support.v7.widget.Toolbar>
<Button
android:id="#+id/mmv_toggle_detail"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="right|bottom"
app:layout_collapseMode="pin"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
For complex behaviors you need to code this in behavior classes
Step # 1:
Create a Custom Behavior
public class BottomBarBehavior extends CoordinatorLayout.Behavior<LinearLayout> {
private int defaultDependencyTop = -1;
public BottomBarBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
public BottomBarBehavior() {
}
#Override
public boolean layoutDependsOn(CoordinatorLayout parent, LinearLayout child, View dependency) {
return dependency instanceof AppBarLayout;
}
#Override
public boolean onDependentViewChanged(CoordinatorLayout parent, LinearLayout child, View dependency) {
//do something with the layout. see commented
return true;
}
}
Step # 2
Assign the behavior to the toolbar.
Either via xml:
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="center"
**app:layout_behavior=".BottomBarBehavior"**
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<Button
android:id="#+id/mmv_toggle_detail"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="right"
/>
</android.support.v7.widget.Toolbar>
More info here: https://developer.android.com/reference/android/support/design/widget/CoordinatorLayout.Behavior.html
Try this, I hope it will help you ...
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/col"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimaryDark"
android:fitsSystemWindows="true">
<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"
app:elevation="4dp"
android:transitionName="#string/pic_transition_name"
app:layout_collapseMode="parallax">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/clpsToolbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapsedTitleTextAppearance="#style/CollapsedText"
app:contentScrim="#color/colorPrimary"
app:expandedTitleTextAppearance="#style/ExpandedText"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="#+id/iv_gallery"
android:layout_width="match_parent"
android:layout_height="320dp"
android:layout_gravity="center_horizontal"
app:layout_collapseMode="parallax"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="center"
app:layout_collapseMode="pin"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<Button
android:id="#+id/mmv_toggle_detail"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center|bottom"
app:layout_anchor="#id/appbar"
app:layout_anchorGravity="bottom|center" />
</android.support.design.widget.CoordinatorLayout>
in JavaClass you will add below code .
appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
#Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
if (Math.abs(verticalOffset) == appBarLayout.getTotalScrollRange()) {
// Collapsed
} else if (verticalOffset == 0) {
// Expanded
if (yourBtn.getVisibility()==View.VISIBLE) {
yourBtn.setVisibility(View.INVISIBLE);
}
} else {
// Somewhere in between
if (yourBtn.getVisibility()==View.VISIBLE) {
yourBtn.setVisibility(View.INVISIBLE);
}
}
}
});
I am struggling with this problem.
I have Activity with toolbars (2 and 1 TAB). But after creating Fragment with RecyclerView, this RecyclerView just ignores Toolbars and is all over screen (fullscreen / in front).
fragment_category.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:id="#+id/relativelayout_recycler"
android:layout_height="match_parent">
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="#dimen/spacing_small"
android:scrollbars="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
Part of activity_main.xml
<RelativeLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout
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">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="enterAlways">
<include layout="#layout/toolbar" />
</FrameLayout>
<View
android:id="#+id/toolbar_delimiter"
android:layout_width="match_parent"
android:layout_height="1px"
android:background="#color/view_background"
android:visibility="gone"
app:layout_scrollFlags="scroll|enterAlways|snap" />
<FrameLayout
android:id="#+id/frame_filters_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:visibility="gone"
app:layout_scrollFlags="scroll|enterAlways|snap">
<include layout="#layout/toolbar_filters" />
</FrameLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/tabs"
android:visibility="gone"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
<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"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="#dimen/spacing_large"
android:clickable="true"
android:src="#drawable/ic_no_item"
android:tint="#android:color/white" />
</RelativeLayout>
FragmentCategory.java
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_category, null);
context = getActivity();
// activate fragment menu
setHasOptionsMenu(true);
db = new DatabaseHandler(getActivity());
sharedPref = new SharedPref(getActivity());
resolveCategory();
lyt_not_found = view.findViewById(R.id.lyt_not_found);
recyclerView = (RecyclerView) view.findViewById(R.id.recycler);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), Tools.getGridSpanCount(getActivity())));
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView v, int state) {
super.onScrollStateChanged(v, state);
if(state == RecyclerView.SCROLL_STATE_DRAGGING || state == RecyclerView.SCROLL_STATE_SETTLING){
ActivityMain.animateFab(true);
} else {
ActivityMain.animateFab(false);
}
}
});
swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_refresh_layout);
swipeLayout.setOnRefreshListener(this);
swipeLayout.setColorSchemeResources(
R.color.colorAccent, R.color.colorAccentDark);
displayDataFromDatabase();
return view;
}
I know that I am just doing some stupid mistake, but I can´t just figure it out. Sorry for my poor english and skills. And thanks if you try to help me :)
You can change activity_main.xml to this.
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="enterAlways">
<include layout="#layout/toolbar"/>
</FrameLayout>
<View
android:id="#+id/toolbar_delimiter"
android:layout_width="match_parent"
android:layout_height="1px"
android:background="#color/view_background"
android:visibility="gone"
app:layout_scrollFlags="scroll|enterAlways|snap"/>
<FrameLayout
android:id="#+id/frame_filters_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:visibility="gone"
app:layout_scrollFlags="scroll|enterAlways|snap">
<include layout="#layout/toolbar_filters"/>
</FrameLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed"/>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/frame_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/tabs"
android:visibility="gone"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<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"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_gravity="end|bottom"
android:layout_margin="#dimen/spacing_large"
android:clickable="true"
android:src="#drawable/ic_no_item"
android:tint="#android:color/white"/>
</android.support.design.widget.CoordinatorLayout>
You can add ViewPager and FloatingActionButton to CoordinatorLayout.
And you can add some app:layout_behavior to it.
Iv seen many threads like that, but non of them helped me. When i use RecyclerView inside NestedScrollView im having scrolling issues - stuck. I know its because that is scroll inside scroll,
rv.setNestedScrollingEnabled(false); is not working for me.
on few thread there was information that NestedScrollView dont have to be used - but then toolbar is not collapsing.
My XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleGravity="bottom"
app:expandedTitleMarginStart="#dimen/activity_vertical_margin"
app:expandedTitleTextAppearance="#style/CollapsedAppBarTopic"
app:layout_collapseMode="parallax"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax">
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/activity_vertical_margin">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:alpha="0.5"
app:layout_collapseMode="parallax"
app:srcCompat="#drawable/logo_white" />
<TextView
android:id="#+id/yourVotes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginEnd="15dp"
android:layout_marginRight="15dp"
android:layout_toLeftOf="#+id/votesSum"
android:layout_toStartOf="#+id/votesSum"
android:text="#string/YourVotes"
android:textAlignment="viewStart" />
<TextView
android:id="#+id/votesSum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:text="1" />
</RelativeLayout>
</FrameLayout>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbarDetails"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<TableLayout
android:id="#+id/tableLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorBackground">
<TableRow>
<TextView
android:layout_weight="1"
android:elevation="1dp"
android:text="#string/VotesSum"
android:textAlignment="center" />
<TextView
android:layout_weight="1"
android:elevation="0dp"
android:text="#string/TodayVotes"
android:textAlignment="center" />
<TextView
android:layout_weight="1"
android:text="#string/TodayAdded"
android:textAlignment="center" />
</TableRow>
<TableRow>
<TextView
android:layout_weight="1"
android:text="1"
android:textAlignment="center" />
<TextView
android:id="#+id/textView3"
android:layout_weight="1"
android:text="2"
android:textAlignment="center" />
<TextView
android:layout_weight="1"
android:text="3"
android:textAlignment="center" />
</TableRow>
</TableLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/tracks_recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="60dp"
android:background="#color/colorBackground" />
<ProgressBar
android:id="#+id/progressBarDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center"
android:background="#android:color/transparent" />
</LinearLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#color/colorPrimary"
app:itemBackground="#color/colorPrimary"
app:itemIconTint="#drawable/bottom_nav_colors"
app:itemTextColor="#drawable/bottom_nav_colors"
app:menu="#menu/navigation" />
</android.support.design.widget.CoordinatorLayout>
So, please help me to make that work
public class PlaylistDetailActivityWithoutFragmet extends AppCompatActivity {
private TextView votesLeft;
private RecyclerView lvTracks;
private SinglePlaylistFragment_.OnFragmentInteractionListener mListener;
SinglTracksAdapter recyclerViewAdapter;
final ArrayList<PlaylistTracks> playlistsTracks = new ArrayList<PlaylistTracks>();
final ArrayList<PlaylistTracks> playlistsTracks2 = new ArrayList<PlaylistTracks>();
int lastId = 0;
private boolean loading = true;
ProgressBar progressBar;
Toolbar toolbarDetails;
CollapsingToolbarLayout collapsingToolbarLayout;
int firstVisibleItem, visibleItemCount, totalItemCount;
private int visibleThreshold = 2;
final LinearLayoutManager llm = new LinearLayoutManager(this);
int height;
NestedScrollView nestedScrollView;
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
// mTextMessage.setText(R.string.Playlist);
return true;
case R.id.navigation_dashboard:
// mTextMessage.setText(R.string.Statistics);
return true;
case R.id.navigation_notifications:
// mTextMessage.setText(R.string.Users);
return true;
}
return false;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_coordinator_layout);
toolbarDetails = (Toolbar) findViewById(R.id.toolbarDetails);
collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
setSupportActionBar(toolbarDetails);
collapsingToolbarLayout.setTitle(playlistName);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
toolbarDetails.setNavigationIcon(getResources().getDrawable(R.drawable.ic_arrow_back_black_24dp));
toolbarDetails.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mWebSocketClient.close();
onBackPressed();
}
});
llm.setOrientation(LinearLayoutManager.VERTICAL);
// nestedScrollView = (NestedScrollView) findViewById(R.id.nestedScroll);
lvTracks = (RecyclerView) findViewById(R.id.tracks_recycler_view);
lvTracks.setLayoutManager(llm);
lvTracks.setNestedScrollingEnabled(false);
// nestedScrollView.setSmoothScrollingEnabled(true);
progressBar = (ProgressBar) findViewById(R.id.progressBarDetails);
progressBar.setVisibility(View.GONE);
loading = true;
getTracks();
lvTracks.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
visibleItemCount = llm.getChildCount();
totalItemCount = llm.getItemCount();
firstVisibleItem = llm.findFirstVisibleItemPosition();
Log.i("dx", String.valueOf(dx));
Log.i("dy", String.valueOf(dy));
Log.i("visibleItemCount", String.valueOf(visibleItemCount));
Log.i("firstVisibleItem", String.valueOf(firstVisibleItem));
Log.i("totalItemCount", String.valueOf(totalItemCount));
if (!loading && (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
loading = true;
getMoreTracks(1, 2);
}
}
});
//
// nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
// #Override
// public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
// if (!loading && v.getChildAt(v.getChildCount() - 1) != null) {
// if ((scrollY >= (v.getChildAt(v.getChildCount() - 1).getMeasuredHeight() - v.getMeasuredHeight())) &&
// scrollY > oldScrollY) {
// progressBar.setVisibility(View.VISIBLE);
// loading = true;
//
// getMoreTracks(scrollX, scrollY);
//
//
// }
// }
// }
// });
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
#Override
public void onBackPressed() {
mWebSocketClient.close();
super.onBackPressed();
}
}
}
Updated XML
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleGravity="bottom"
app:expandedTitleMarginStart="#dimen/activity_vertical_margin"
app:expandedTitleTextAppearance="#style/CollapsedAppBarTopic"
app:layout_collapseMode="parallax"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax">
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/activity_vertical_margin">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:alpha="0.5"
app:layout_collapseMode="parallax"
app:srcCompat="#drawable/logo_white" />
<TextView
android:id="#+id/yourVotes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginEnd="15dp"
android:layout_marginRight="15dp"
android:layout_toLeftOf="#+id/votesSum"
android:layout_toStartOf="#+id/votesSum"
android:text="#string/YourVotes"
android:textAlignment="viewStart" />
<TextView
android:id="#+id/votesSum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginRight="#dimen/activity_horizontal_margin"
android:text="1" />
</RelativeLayout>
</FrameLayout>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbarDetails"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/tracks_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="60dp"
android:background="#color/colorBackground"
app:layout_behavior="#string/appbar_scrolling_view_behavior"/>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="#color/colorPrimary"
app:itemBackground="#color/colorPrimary"
app:itemIconTint="#drawable/bottom_nav_colors"
app:itemTextColor="#drawable/bottom_nav_colors"
app:menu="#menu/navigation" />
</android.support.design.widget.CoordinatorLayout>
All you have to do is use below line in your activity class:
ViewCompat.setNestedScrollingEnabled(recycler_view, false);
its compatible for lower versions also. and if you want to give compatible to API >21 only then use;
recycler_view.setNestedScrollingEnabled(false);
Since your final objective is to have the ToolBar diasappear/collapse when you scroll on the recyclerView, you should not use NestedScrollView, but CoordinatorLayout instead.
Have a look here.
Here is a quick example taken from the doc I provided on how to create a collapsing toolbar.
Firstly in your xml:
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"></android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
Make sure that in your Activity, in your onCreate() you set it the right way:
CollapsingToolbarLayout collapsingToolbar =
(CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbar.setTitle("Title");
Hope it helps.
I am making an app that has a ProfilePage with three fragments - About | Posts | Gallery, and I am using a collapsible toolbar with user's image. My second and third fragment will have a footer that should always be visible, but this is what I get:
When my image is expanded the footer disappears. What I want is for my two fragments to have these footers always visible and not depending on toolbar being collapsed or not. My gallery footer should be similar to post footer.
profile_layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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="256dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
contentScrim="?attr/colorPrimary"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/profile_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:contentDescription="#string/profile_photo"
app:layout_collapseMode="none"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin">
<ImageView
android:id="#+id/toolbarEdit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:contentDescription="#string/block"
android:paddingEnd="20dp"
android:paddingStart="5dp"
app:srcCompat="#drawable/ic_icon_edit" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.design.widget.TabLayout
android:id="#+id/myProfileTabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
app:tabContentStart="72dp"
app:tabGravity="fill"
app:tabMode="scrollable" />
<android.support.v4.view.ViewPager
android:id="#+id/myProfileViewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
posts_fragment.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/tile_bg"
android:orientation="vertical" >
<ListView
android:id="#+id/list_view_messages"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#null"
android:divider="#null"
android:transcriptMode="alwaysScroll"
android:stackFromBottom="true">
</ListView>
<LinearLayout
android:id="#+id/llMsgCompose"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#color/white"
android:orientation="horizontal"
android:weightSum="4" >
<EditText
android:id="#+id/inputMsg"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="3"
android:background="#color/bg_msg_input"
android:textColor="#color/text_msg_input"
android:paddingLeft="6dp"
android:paddingRight="6dp"/>
<Button
android:id="#+id/btnSend"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#color/ppdColorOrange"
android:textColor="#color/white"
android:text="#string/send" />
</LinearLayout>
My PostsFragment (not yet implemented):
public class MyProfilePostsFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.navdrawer_my_profile_fragment_posts, container, false);
return view;
}
}
I had the same requirement for my one of apps. I just did workaround.
Add your required layout in tab layout:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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="256dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
contentScrim="?attr/colorPrimary"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/profile_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:scaleType="centerCrop"
android:contentDescription="#string/profile_photo"
app:layout_collapseMode="none"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin">
<ImageView
android:id="#+id/toolbarEdit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end"
android:contentDescription="#string/block"
android:paddingEnd="20dp"
android:paddingStart="5dp"
app:srcCompat="#drawable/ic_icon_edit" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<android.support.design.widget.TabLayout
android:id="#+id/myProfileTabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
app:tabContentStart="72dp"
app:tabGravity="fill"
app:tabMode="scrollable" />
<android.support.v4.view.ViewPager
android:id="#+id/myProfileViewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
<-- Your required layout -->
<LinearLayout
android:id="#+id/tab123"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:gravity="bottom"
android:orientation="horizontal"
android:visibility="gone"
android:weightSum="4">
<EditText
android:id="#+id/inputMsg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:paddingLeft="6dp"
android:paddingRight="6dp" />
<Button
android:id="#+id/btnSend"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="send" />
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
Add following code in your Tab activity:
TabLayout tabLayout;
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);//add your viewpager to TabLayout
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
LinearLayout l=(LinearLayout) findViewById(R.id.tab123);
final EditText text=(EditText) findViewById(R.id.inputMsg);
Button send=(Button) findViewById(R.id.btnSend);
if (tab.getPosition() == 0) {
l.setVisibility(View.GONE);
System.out.println("About tab");
} else if (tab.getPosition() == 1) {
l.setVisibility(View.VISIBLE);
System.out.println("Posts tab");
send.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String msg = null;
msg = text.getText().toString(); //get input
// Perform your desired task.
}
});
} else if (tab.getPosition() == 2) {
l.setVisibility(View.VISIBLE);
System.out.println("Gallery tab");
send.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String msg = null;
msg = text.getText().toString(); //get input
//Perform your desired task.
}
});
}
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
I am working on one android app in which I am using CoordinatorLayout,AppBarLayout and CollapsingToolbarLayout to use the advance collapse bar functionality.
I am using recyclerview to show the number of items in the fragment. When I'm scrolling up recyclerview it smoothly collapse AppBarLayout but when I scroll down and reach at on the first item of the recyclerview it automatically stop scrolling without expanding `AppBarLayout'.
Then again I need to scroll down again to make AppBarLayout visible. So my requirement is that on scrolling down when I reach to top of recyclerview it must expand `AppBarLayout'.
How can we do this. Any idea ? Please see video of same https://www.dropbox.com/s/va5jk27ikytk5ax/app_collapsebar_issue.mp4?dl=0
Here is my layout of same :-
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/coordinator"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="220dp"
android:background="#drawable/offer_image"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<!-- <com.flaviofaria.kenburnsview.KenBurnsView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="220dp"
android:src="#drawable/offer_image" />-->
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<com.flaviofaria.kenburnsview.KenBurnsView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="220dp"
android:src="#drawable/offer_image" />
<FrameLayout
android:id="#+id/collapse_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#B3c85a00">
</FrameLayout>
<FrameLayout
android:id="#+id/centerCircle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center">
<ImageView
android:id="#+id/imageViewCenter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="#drawable/offer" />
</FrameLayout>
<include
android:id="#+id/toolbar"
layout="#layout/toolbar" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="15dp"
app:tabIndicatorColor="#FFFFFF"
app:tabMode="scrollable" />
<!--</FrameLayout>-->
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<!--<FrameLayout-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="match_parent"-->
<!-- -->
<!--android:visibility="visible">-->
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
style="#style/floating_action_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:src="#drawable/ic_share_white_24dp"
android:visibility="gone"
app:backgroundTint="#FF9800"
app:elevation="6dp"
app:pressedTranslationZ="12dp" />
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left|bottom|fill_vertical"
android:layout_marginTop="0dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"></android.support.v4.view.ViewPager>
<!--</FrameLayout>-->
<!--<include layout="#layout/content_scrolling" />-->
</android.support.design.widget.CoordinatorLayout>
<RelativeLayout
android:id="#+id/bannerView"
android:layout_width="match_parent"
android:layout_height="58dp"
android:layout_gravity="bottom|center"
android:background="#drawable/curved_white_with_blue_border"
android:visibility="gone">
<TextView
android:id="#+id/bannerText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerInParent="true"
android:layout_centerVertical="true"
android:gravity="center"
android:padding="3dp"
android:text="Banner"
android:visibility="gone" />
<ImageView
android:id="#+id/bannerImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:padding="3dp"
android:scaleType="fitXY"
android:visibility="gone" />
<ImageView
android:id="#+id/bannerClose"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_centerVertical="true"
android:src="#drawable/cross_icon" />
</RelativeLayout>
<LinearLayout
android:id="#+id/socialTabs"
android:layout_width="match_parent"
android:layout_height="46dp"
android:layout_gravity="bottom|center"
android:layout_marginBottom="5dp"
android:background="#color/White"
android:orientation="horizontal"
android:visibility="gone">
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:src="#drawable/follow" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="#color/White">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="46dp"
android:layout_gravity="center"
android:gravity="center"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:weightSum="3">
<ImageView
android:id="#+id/facebookImageView"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="1"
android:src="#drawable/fb_follow" />
<ImageView
android:id="#+id/googlePlusImageView"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:adjustViewBounds="true"
android:src="#drawable/google_follow" />
<ImageView
android:id="#+id/twitterImageView"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="1"
android:adjustViewBounds="true"
android:src="#drawable/twitter_follow" />
</LinearLayout>
</FrameLayout>
</LinearLayout>
</FrameLayout>
<ExpandableListView
android:id="#+id/left_drawer"
android:layout_width="265dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#fff"
android:choiceMode="singleChoice"
android:divider="#null"
android:dividerHeight="0dp"
android:drawSelectorOnTop="true"
android:groupIndicator="#null"
android:scrollbars="#null" />
</android.support.v4.widget.DrawerLayout>
I've just put together a sample app that seems to demonstrate the behaviour you're after. The AppBar will automatically expand whenever the RecyclerView beneath it is scrolled to the top, rather than stopping and waiting for another swipe to open the AppBar.
The most relevant components reside in a custom RecyclerView class. I've added a few explanatory comments:
public class ScrollFeedbackRecyclerView extends RecyclerView {
private WeakReference<Callbacks> mCallbacks;
public ScrollFeedbackRecyclerView(Context context) {
super(context);
attachCallbacks(context);
}
public ScrollFeedbackRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
attachCallbacks(context);
}
/*If the first completely visible item in the RecyclerView is at
index 0, then we're at the top of the list, so we want the AppBar to expand
**if the AppBar is also collapsed** (otherwise the AppBar will constantly
attempt to expand).
*/
#Override
public void onScrolled(int dx, int dy) {
if(((LinearLayoutManager)getLayoutManager()).findFirstCompletelyVisibleItemPosition() == 0) {
Log.e(getClass().getSimpleName(), "index 0 visible");
if(mCallbacks.get().isAppBarCollapsed()) {
mCallbacks.get().setExpanded(true);
}
}
super.onScrolled(dx, dy);
}
/* the findFirstCompletelyVisibleItem() method is only available with
LinearLayoutManager and its subclasses, so test for it when setting the
LayoutManager
*/
#Override
public void setLayoutManager(LayoutManager layout) {
if(!(layout instanceof LinearLayoutManager)) {
throw new IllegalArgumentException(layout.toString() + " must be of type LinearLayoutManager");
}
super.setLayoutManager(layout);
}
private void attachCallbacks(Context context) {
try {
mCallbacks = new WeakReference<>((Callbacks)context);
} catch (ClassCastException e) {
throw new ClassCastException(context.toString() + " must implement " +
"ScrollFeedbackRecyclerView.Callbacks");
}
}
/* Necessary to interact with the AppBarLayout in the hosting Activity
*/
interface Callbacks {
boolean isAppBarCollapsed();
void setExpanded(boolean expanded);
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity implements ScrollFeedbackRecyclerView.Callbacks{
private AppBarLayout mAppBarLayout;
private Toolbar mToolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ScrollFeedbackRecyclerView mRecyclerView = (ScrollFeedbackRecyclerView) findViewById(R.id.rv_container);
RecyclerViewAdapter mAdapter = new RecyclerViewAdapter();
mRecyclerView.setAdapter(mAdapter);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mAppBarLayout = (AppBarLayout) findViewById(R.id.app_bar);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
}
/* When collapsed, calling getY() on the AppBar will return a negative number.
Adding this number to getHeight() will return the same value as the toolbar's
height if the AppBar is fully collapsed.
*/
#Override
public boolean isAppBarCollapsed() {
final int appBarVisibleHeight = (int) (mAppBarLayout.getY() + mAppBarLayout.getHeight());
final int toolbarHeight = mToolbar.getHeight();
return (appBarVisibleHeight == toolbarHeight);
}
#Override
public void setExpanded(boolean expanded) {
mAppBarLayout.setExpanded(expanded, true);
}
}