RecyclerView inside NestedScrollView scrolling issue

RecyclerView inside NestedScrollView scrolling issue - android

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.

Related

Collapsible Toolbar - Make Fragment Footer Always Visible in Android

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) {
}
});

How to add an ImageView with the title in collapsingtoolbarlayout in Android

I am using CoordinatorLayout to get this effect
Here is the layout code.
<?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:id="#+id/coordinatorRootLayout"
android:background="#android:color/background_light"
android:fitsSystemWindows="true"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/android_appbar_layout"
android:layout_width="match_parent"
android:layout_height="220dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarLayoutAndroidExample"
android:layout_width="match_parent"
android:background="#fff"
app:collapsedTitleGravity="left"
app:expandedTitleTextAppearance="#color/card_outline"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:expandedTitleGravity="center_horizontal"
app:contentScrim="?attr/colorPrimary"
app:statusBarScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="32dp"
app:expandedTitleMarginEnd="48dp">
<ImageView
android:id="#+id/parallax_header_imageview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"
android:src="#drawable/orange_triangle"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.8"/>
<ImageView
app:expandedTitleGravity="center_horizontal"
android:id="#+id/someImage"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/circle"
android:layout_gravity="center_horizontal"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="-1"
/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_android"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="none"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="#+id/nested_scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="#+id/linear_layout_android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="15dp"
android:background="#color/off_white"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:orientation="vertical">
<GridView
android:id="#+id/gridview_parallax_header"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
and here is what i am getting as output
How can use icon with the title text.
and in Java
mRootLayout = (CoordinatorLayout) findViewById(R.id.coordinatorRootLayout);
mCollapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsingToolbarLayoutAndroidExample);
mCollapsingToolbarLayout.setExpandedTitleColor(getResources().getColor(R.color.black));
mCollapsingToolbarLayout.setTitle("My App Title");

You can follow this link...
https://github.com/saulmm/CoordinatorBehaviorExample
MainActivity.java
import android.os.Bundle;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity
implements AppBarLayout.OnOffsetChangedListener {
private static final float PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR = 0.9f;
private static final float PERCENTAGE_TO_HIDE_TITLE_DETAILS = 0.3f;
private static final int ALPHA_ANIMATIONS_DURATION = 200;
private boolean mIsTheTitleVisible = false;
private boolean mIsTheTitleContainerVisible = true;
private LinearLayout mTitleContainer;
private TextView mTitle;
private AppBarLayout mAppBarLayout;
private Toolbar mToolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bindActivity();
mAppBarLayout.addOnOffsetChangedListener(this);
mToolbar.inflateMenu(R.menu.menu_main);
startAlphaAnimation(mTitle, 0, View.INVISIBLE);
}
private void bindActivity() {
mToolbar = (Toolbar) findViewById(R.id.main_toolbar);
mTitle = (TextView) findViewById(R.id.main_textview_title);
mTitleContainer = (LinearLayout) findViewById(R.id.main_linearlayout_title);
mAppBarLayout = (AppBarLayout) findViewById(R.id.main_appbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public void onOffsetChanged(AppBarLayout appBarLayout, int offset) {
int maxScroll = appBarLayout.getTotalScrollRange();
float percentage = (float) Math.abs(offset) / (float) maxScroll;
handleAlphaOnTitle(percentage);
handleToolbarTitleVisibility(percentage);
}
private void handleToolbarTitleVisibility(float percentage) {
if (percentage >= PERCENTAGE_TO_SHOW_TITLE_AT_TOOLBAR) {
if(!mIsTheTitleVisible) {
startAlphaAnimation(mTitle, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
mIsTheTitleVisible = true;
}
} else {
if (mIsTheTitleVisible) {
startAlphaAnimation(mTitle, ALPHA_ANIMATIONS_DURATION, View.INVISIBLE);
mIsTheTitleVisible = false;
}
}
}
private void handleAlphaOnTitle(float percentage) {
if (percentage >= PERCENTAGE_TO_HIDE_TITLE_DETAILS) {
if(mIsTheTitleContainerVisible) {
startAlphaAnimation(mTitleContainer, ALPHA_ANIMATIONS_DURATION, View.INVISIBLE);
mIsTheTitleContainerVisible = false;
}
} else {
if (!mIsTheTitleContainerVisible) {
startAlphaAnimation(mTitleContainer, ALPHA_ANIMATIONS_DURATION, View.VISIBLE);
mIsTheTitleContainerVisible = true;
}
}
}
public static void startAlphaAnimation (View v, long duration, int visibility) {
AlphaAnimation alphaAnimation = (visibility == View.VISIBLE)
? new AlphaAnimation(0f, 1f)
: new AlphaAnimation(1f, 0f);
alphaAnimation.setDuration(duration);
alphaAnimation.setFillAfter(true);
v.startAnimation(alphaAnimation);
}
}
activity_main.xml
<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:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="RtlHardcoded"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/main.appbar"
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/main.collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="#+id/main.imageview.placeholder"
android:layout_width="match_parent"
android:layout_height="300dp"
android:scaleType="centerCrop"
android:src="#drawable/quila2"
android:tint="#11000000"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.9"
/>
<FrameLayout
android:id="#+id/main.framelayout.title"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="bottom|center_horizontal"
android:background="#color/primary"
android:orientation="vertical"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.3"
>
<LinearLayout
android:id="#+id/main.linearlayout.title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="bottom|center"
android:text="#string/quila_name"
android:textColor="#android:color/white"
android:textSize="30sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="4dp"
android:text="#string/quila_tagline"
android:textColor="#android:color/white"
/>
</LinearLayout>
</FrameLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
app:behavior_overlapTop="30dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
>
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
app:cardElevation="8dp"
app:contentPadding="16dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lineSpacingExtra="8dp"
android:text="#string/lorem"
android:textSize="18sp"
/>
</android.support.v7.widget.CardView>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.Toolbar
android:id="#+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/primary"
app:layout_anchor="#id/main.framelayout.title"
app:theme="#style/ThemeOverlay.AppCompat.Dark"
app:title=""
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<Space
android:layout_width="#dimen/image_final_width"
android:layout_height="#dimen/image_final_width"
/>
<TextView
android:id="#+id/main.textview.title"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:gravity="center_vertical"
android:text="#string/quila_name2"
android:textColor="#android:color/white"
android:textSize="20sp"
/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="#dimen/image_width"
android:layout_height="#dimen/image_width"
android:layout_gravity="center_horizontal"
android:src="#drawable/quila"
app:border_color="#android:color/white"
app:border_width="2dp"
app:finalHeight="#dimen/image_final_width"
app:finalYPosition="2dp"
app:layout_behavior="saulmm.myapplication.AvatarImageBehavior"
app:startHeight="2dp"
app:startToolbarPosition="2dp"
app:startXPosition="2dp"
/>
</android.support.design.widget.CoordinatorLayout>

use
<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:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="RtlHardcoded"
>
<android.support.design.widget.AppBarLayout
android:id="#+id/main.appbar"
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/main.collapsing"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
>
<ImageView
android:id="#+id/main.imageview.placeholder"
android:layout_width="match_parent"
android:layout_height="300dp"
android:scaleType="centerCrop"
android:src="#drawable/quila2"
android:tint="#11000000"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.9"
/>
<FrameLayout
android:id="#+id/main.framelayout.title"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_gravity="bottom|center_horizontal"
android:background="#color/primary"
android:orientation="vertical"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="0.3"
>
<LinearLayout
android:id="#+id/main.linearlayout.title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="vertical"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="bottom|center"
android:text="#string/quila_name"
android:textColor="#android:color/white"
android:textSize="30sp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="4dp"
android:text="#string/quila_tagline"
android:textColor="#android:color/white"
/>
</LinearLayout>
</FrameLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="none"
app:behavior_overlapTop="30dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
>
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
app:cardElevation="8dp"
app:contentPadding="16dp"
>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lineSpacingExtra="8dp"
android:text="#string/lorem"
android:textSize="18sp"
/>
</android.support.v7.widget.CardView>
</android.support.v4.widget.NestedScrollView>
<android.support.v7.widget.Toolbar
android:id="#+id/main.toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/primary"
app:layout_anchor="#id/main.framelayout.title"
app:theme="#style/ThemeOverlay.AppCompat.Dark"
app:title=""
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<Space
android:layout_width="#dimen/image_final_width"
android:layout_height="#dimen/image_final_width"
/>
<TextView
android:id="#+id/main.textview.title"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="8dp"
android:gravity="center_vertical"
android:text="#string/quila_name2"
android:textColor="#android:color/white"
android:textSize="20sp"
/>
</LinearLayout>
</android.support.v7.widget.Toolbar>
<de.hdodenhof.circleimageview.CircleImageView
android:layout_width="#dimen/image_width"
android:layout_height="#dimen/image_width"
android:layout_gravity="center_horizontal"
android:src="#drawable/quila"
app:border_color="#android:color/white"
app:border_width="2dp"
app:finalHeight="#dimen/image_final_width"
app:finalYPosition="2dp"
app:layout_behavior="saulmm.myapplication.AvatarImageBehavior"
app:startHeight="2dp"
app:startToolbarPosition="2dp"
app:startXPosition="2dp"
/>
</android.support.design.widget.CoordinatorLayout>
for more info: https://github.com/saulmm/CoordinatorBehaviorExample

Using a coordinatorlayout to collapse a full screen imageview and replace it with viewpager with headers

I started playing around with coordinatoralyout and I'm trying to achieve the behavior on the attached image, I want a background image to be on full screen size and upon a scroll I want some textviews to dissapear and some to stick as parts of a viewpager (rather then a toolbarlayout) any guidance on how can I achieve this?

You can use layout_behavior to handle the strings which you want to be disappear upon scroll. Customise your view behaviour using CoordinatorLayout.Behavior
ViewBehavior.java
public class ViewBehavior extends CoordinatorLayout.Behavior<RelativeLayout> {
private Context mContext;
public ViewBehavior(Context context, AttributeSet attrs) {
mContext = context;
}
#Override
public boolean layoutDependsOn(CoordinatorLayout parent, RelativeLayout child, View dependency) {
return dependency instanceof AppBarLayout;
}
#Override
public boolean onDependentViewChanged(CoordinatorLayout parent, RelativeLayout child, View dependency) {
child.measure(View.MeasureSpec.makeMeasureSpec(parent.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(parent.getHeight(), View.MeasureSpec.AT_MOST));
int maxScroll = ((AppBarLayout) dependency).getTotalScrollRange();
float percentage = Math.abs(dependency.getY()) / (float) maxScroll;
float childPosition = dependency.getHeight()
+ dependency.getY()
- child.getMeasuredHeight()
- (getToolbarHeight() - child.getMeasuredHeight()) * percentage / 2;
CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) child.getLayoutParams();
child.setLayoutParams(lp);
child.setY(childPosition);
return true;
}
public int getToolbarHeight() {
int result = 0;
TypedValue tv = new TypedValue();
if (mContext.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) {
result = TypedValue.complexToDimensionPixelSize(tv.data, mContext.getResources().getDisplayMetrics());
}
return result;
}
}
In layout xml, set your custom view behaviour as a app:layout_behavior in the view you want to handle.
activity_main.xml
<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/coordinator_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
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:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="#+id/llViewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.astuetz.PagerSlidingTabStrip
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="48dp"
android:textColor="#color/red"
app:pstsShouldExpand="true"
app:pstsTextAllCaps="true" />
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/white" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="com.stacktest.ViewBehavior">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginBottom="20dp"
android:layout_marginLeft="36dp"
android:layout_marginTop="20dp"
android:text="Text-1" />
<TextView
android:id="#+id/txt2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginBottom="20dp"
android:layout_marginRight="36dp"
android:layout_marginTop="20dp"
android:text="Text-2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#id/txt2"
android:layout_marginBottom="20dp"
android:layout_marginLeft="36dp"
android:paddingRight="20dp"
android:text="Text-3" />
<TextView
android:id="#+id/txt4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#id/txt2"
android:layout_marginBottom="20dp"
android:layout_marginRight="36dp"
android:text="Text-4" />
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
Finally, use the layout and create ViewPager and Tabs in your Activity class.
MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
((CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar)).setTitle(" ");
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
PagerSlidingTabStrip tabsStrip = (PagerSlidingTabStrip) findViewById(R.id.tabs);
tabsStrip.setViewPager(viewPager);
}
public class MyPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 2;
private String tabTitles[] = new String[] { "Tab1", "Tab2" };
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public Fragment getItem(int position) {
return TestFragment.newInstance(position + 1);
}
#Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
}
}
Add following extra dependency in build.gradle along with appcompat and support library.
com.android.support:design:23.2.1
com.astuetz:pagerslidingtabstrip:1.0.1 (for ViewPager tabs)

As I am not sure if you want a particular or a general solution, I am going to give you my solution for your particular question. The key is to work with scrollFlags and collapseMode. If you really want to hide the tabs when the appBar is expanded, you can play with visibility.
<?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="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="wrap_content"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways|snap">
<RelativeLayout
android:layout_marginTop="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="375dp"
android:src="#drawable/ic_launcher"/>
<LinearLayout
android:layout_marginBottom="30dp"
android:layout_below="#+id/image"
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<TextView
android:layout_marginLeft="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="textView1"/>
<TextView
android:layout_marginLeft="140dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="textView2"/>
</LinearLayout>
</RelativeLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/mToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin"/>
</android.support.design.widget.CollapsingToolbarLayout>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<TextView
android:layout_marginLeft="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="textView3"/>
<TextView
android:layout_marginLeft="140dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="textView4"/>
</LinearLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="?attr/colorPrimary"
app:tabMode="scrollable"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/tab_viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />

How to handle scroll in NestedScrollView

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

How to expand AppBarLayout when scrolling down reaches at top of the RecyclerView

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);
}
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

RecyclerView inside NestedScrollView scrolling issue - android

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);

Related

Collapsible Toolbar - Make Fragment Footer Always Visible in Android

How to add an ImageView with the title in collapsingtoolbarlayout in Android

Using a coordinatorlayout to collapse a full screen imageview and replace it with viewpager with headers

How to handle scroll in NestedScrollView

How to expand AppBarLayout when scrolling down reaches at top of the RecyclerView

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