Android collapsing toolbar fragment

LuisBurgos / ActivityHelper.java

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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 «

xmlns : tools = » http://schemas.android.com/tools «

android : id = » @+id/information_coordinator_layout «

android : layout_width = » match_parent «

android : layout_height = » match_parent «

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/AppTheme.AppBarOverlay » >

android .support.design.widget.CollapsingToolbarLayout

android : id = » @+id/collapsingToolbarLayout «

android : layout_width = » match_parent «

android : layout_height = » 280dp «

app : contentScrim = » ?attr/colorPrimary «

app : expandedTitleMarginStart = » 48dp «

app : expandedTitleMarginEnd = » 64dp «

app : layout_scrollFlags = » scroll|snap » >

FrameLayout

android : id = » @+id/mapContainer «

android : layout_width = » match_parent «

android : layout_height = » match_parent «

app : layout_collapseMode = » parallax »/>

android .support.design.widget.CollapsingToolbarLayout>

android .support.v7.widget.Toolbar

android : id = » @+id/toolbar «

android : layout_width = » match_parent «

android : layout_height = » wrap_content «

android : minHeight = » 56dp «

android : background = » ?colorPrimary «

android : layout_marginTop = » -56dp «

app : popupTheme = » @style/AppTheme.PopupOverlay «

app : layout_scrollFlags = » scroll|enterAlways|snap »/>

include

android : layout_width = » match_parent «

android : layout_height = » wrap_content «

android : layout_marginTop = » -112dp «

layout = » @layout/activity_model_information_header »/>

android .support.design.widget.TabLayout

android : id = » @+id/sliding_tabs «

android : layout_width = » match_parent «

android : layout_height = » ?attr/actionBarSize «

app : tabIndicatorHeight = » 4dp «

app : tabMode = » fixed »/>

android .support.design.widget.AppBarLayout>

DeactivatableViewPager

android : id = » @+id/viewpager «

android : layout_width = » match_parent «

android : layout_height = » match_parent «

android : background = » @android:color/white «

app : layout_behavior = » @string/appbar_scrolling_view_behavior »/>

android .support.design.widget.CoordinatorLayout>

xml version = » 1.0 » encoding = » utf-8 » ?>

LinearLayout

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 = » wrap_content «

android : orientation = » vertical «

android : gravity = » center «

app : layout_scrollFlags = » scroll|enterAlways|snap » >

LinearLayout

android : layout_width = » match_parent «

android : layout_height = » 112dp «

android : padding = » 6dp «

android : gravity = » center » >

TextView

android : id = » @+id/circleView «

android : layout_width = » 100dp «

android : layout_height = » 100dp «

android : text = » @string/name «

android : background = » @drawable/background_circle «

android : textSize = » 18sp «

android : gravity = » center «

android : textStyle = » bold «

android : textColor = » @color/white »/>

LinearLayout >

TextView

android : id = » @+id/nameTextView «

android : layout_width = » match_parent «

android : layout_height = » 28dp «

android : gravity = » center «

android : text = » @string/name «

android : textAppearance = » @style/TextAppearance.AppCompat.Widget.ActionBar.Title »/>

TextView

android : id = » @+id/descriptionTextView «

android : gravity = » center «

android : layout_width = » match_parent «

android : layout_height = » 28dp «

android : text = » @string/unique_identifier «

android : textAppearance = » @style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle »/>

LinearLayout >

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/**

* Helper class which provides methods to being, redirect, start and finish activities.

public class ActivityHelper <

/**

* The < @code fragment >is added to the container view with id < @code frameId >. The operation is

* performed by the < @code fragmentManager >.

public static void addFragmentToActivity (

@NonNull FragmentManager fragmentManager ,

@NonNull Fragment fragment ,

int frameId

) <

checkNotNull(fragmentManager);

checkNotNull(fragment);

FragmentTransaction transaction = fragmentManager . beginTransaction();

transaction . add(frameId, fragment);

transaction . commit();

public class ActivityModelInformation extends InformationActivity <

private HeaderViewHolder headerInformationHolder;

private TabLayout tabLayout;

private DeactivatableViewPager viewPager;

private MapViewFragment mapFragment;

@Override

protected void onCreate ( Bundle savedInstanceState ) <

super . onCreate(savedInstanceState);

setContentView( R . layout . activity_model_information);

super . baseSetup();

setupViewPager();

setupMapFragment();

@Override

protected void onResume () <

super . onResume();

// CALL PRESENTER TO FETCH DATA

@Override

protected void initViews () <

super . initViews();

viewPager = ( DeactivatableViewPager ) findViewById( R . id . viewpager);

tabLayout = ( TabLayout ) findViewById( R . id . sliding_tabs);

headerInformationHolder = new HeaderViewHolder (findViewById( android . R . id . content));

// INITIALIZE PRESENTER.

@Override

protected void setInformationData () <

Bundle bundle = getIntent() . getExtras();

// SET CLASS VARIABLES from BUNDLE

updateUIHeader();

/**

* This method is NOT used by this class.

* @param isCollapsed state of toolbar.

@Override

protected void onToolbarCollapsed ( boolean isCollapsed ) <

// IMPORTANT! Do nothing

/**

* Retrieves a custom activity title for display on toolbar.

* @return activity title.

@Override

public String getActivityTitle () <

return » Custom Activity Title » ;

/**

* Updates the flowmeter header information.

private void updateUIHeader () <

// UPDATE VALUES ON HEADER VIEW HOLDER

/**

* Setup the view pager that shows information about the parameters.

private void setupViewPager () <

// INITIALIZE THE ADAPTER

viewPager . addOnPageChangeListener( new ViewPager . OnPageChangeListener () <

public void onPageScrollStateChanged ( int state ) <>

public void onPageScrolled ( int position , float positionOffset , int positionOffsetPixels ) <>

public void onPageSelected ( int position ) <

boolean pagingEnable = true ;

/* if(position == MyAdapter.PAGE_NEED_IT_TO_MATCH) <

pagingEnable = false;

> */

viewPager . setPagingEnabled(pagingEnable);

>);

viewPager . setAdapter(sectionsPagerAdapter);

tabLayout . setupWithViewPager(viewPager);

/**

* This method setups a < @link MapViewFragment>to show the flowmeter location.

* This method also validates if Google Play Services are available on the current device.

* If there is no Google Play Services API available the map is not displayed on UI.

private void setupFlowmeterMapFragment () <

final int status = GoogleApiAvailability . getInstance() . isGooglePlayServicesAvailable( this );

if (status != ConnectionResult . SUCCESS ) <

FrameLayout mapContainer = ( FrameLayout ) findViewById( R . id . mapContainer);

mapContainer . setVisibility( View . GONE );

> else <

mapFragment = ( MapViewFragment ) getSupportFragmentManager()

.findFragmentById( R . id . mapContainer);

if (mapFragment == null ) <

mapFragment = MapViewFragment . newInstance( /* Parameters if you need */ );

ActivityHelper . addFragmentToActivity(

getSupportFragmentManager(), mapFragment, R . id . mapContainer);

xml version = » 1.0 » encoding = » utf-8 » ?>

shape

xmlns : android = » http://schemas.android.com/apk/res/android «

android : shape = » oval » >

solid android : color = » @color/white »/>

size

android : height = » 100dp «

android : width = » 100dp »/>

padding

android : bottom = » 15dp «

android : top = » 15dp «

android : left = » 15dp «

android : right = » 15dp »/>

shape >

/**

* Allows to deactivate the paging on a < @link ViewPager>component.

public class DeactivatableViewPager extends ViewPager <

private boolean isPagingEnabled = true ;

public DeactivatableViewPager ( Context context ) <

super (context);

public DeactivatableViewPager ( Context context , AttributeSet attrs ) <

super (context, attrs);

@Override

public boolean onTouchEvent ( MotionEvent event ) <

return this . isPagingEnabled && super . onTouchEvent(event);

@Override

public boolean onInterceptTouchEvent ( MotionEvent event ) <

return this . isPagingEnabled && super . onInterceptTouchEvent(event);

public void setPagingEnabled ( boolean b ) <

this . isPagingEnabled = b;

xml version = » 1.0 » encoding = » utf-8 » ?>

RelativeLayout

xmlns : android = » http://schemas.android.com/apk/res/android «

xmlns : map = » http://schemas.android.com/tools «

android : id = » @+id/supportMapContainer «

android : layout_width = » match_parent «

android : layout_height = » match_parent » >

FrameLayout

android : id = » @+id/map «

android : name = » com.google.android.gms.maps.SupportMapFragment «

android : layout_width = » match_parent «

android : layout_height = » match_parent «

map : cameraZoom = » 13 «

map : mapType = » normal «

map : liteMode = » true »/>

LinearLayout

android : id = » @+id/mapButtons «

android : orientation = » horizontal «

android : layout_width = » wrap_content «

android : layout_height = » wrap_content «

android : layout_alignParentTop = » true «

android : layout_alignParentRight = » true «

android : layout_alignParentEnd = » true «

android : layout_marginRight = » 15dip «

android : layout_marginEnd = » 15dip «

android : layout_marginTop = » 15dip » >

ImageButton

android : id = » @+id/location «

android : src = » @drawable/ic_crosshair_gps «

style = » @style/MapControlButton »/>

ImageButton

android : id = » @+id/zoom_in «

android : layout_marginLeft = » 5dip «

android : layout_marginStart = » 5dip «

android : src = » @drawable/ic_plus «

style = » @style/MapControlButton »/>

ImageButton

android : id = » @+id/zoom_out «

android : src = » @drawable/ic_minus «

android : layout_marginLeft = » 5dip «

android : layout_marginStart = » 5dip «

style = » @style/MapControlButton »/>

LinearLayout >

RelativeLayout >

/**

* Created by luisburgos on 8/18/16.

public class HeaderViewHolder extends RecyclerView . ViewHolder <

public View cirlceView;

public TextView nameTextView;

public TextView descriptionTextView;

public HeaderViewHolder ( View itemView ) <

super (itemView);

cirlceView = itemView . findViewById( R . id . cirlceView);

nameTextView = ( TextView ) itemView . findViewById( R . id . nameTextView);

descriptionTextView = ( TextView ) itemView . findViewById( R . id . descriptionTextView);

/**

* Base UI View to show a basic information about a domain model.

* This class has basic components like < @link CoordinatorLayout>and

* < @link AppBarLayout>.

* Created by luisburgos on 8/31/16.

public abstract class InformationActivity extends AppCompatActivity <

protected CoordinatorLayout coordinatorLayout;

protected AppBarLayout appBarLayout;

protected CollapsingToolbarLayout collapsingToolbarLayout;

protected Toolbar toolbar;

/**

* This method has sequential cohesion in order to achieve a

* correct configuration for the activity. This method NEEDS to be called from

* concrete implementations.

* This method depends on < @link InformationActivity#initViews()>,

* < @link InformationActivity#setInformationData()>, < @link InformationActivity#setupToolbar()>,

protected void baseSetup () <

this . initViews();

this . setInformationData();

this . setupToolbar();

this . setupAppBar();

/**

* BINDS xml components to class variables.

protected void initViews () <

coordinatorLayout = ( CoordinatorLayout ) findViewById( R . id . information_coordinator_layout);

collapsingToolbarLayout = ( CollapsingToolbarLayout ) findViewById( R . id . collapsingToolbarLayout);

toolbar = ( Toolbar ) findViewById( R . id . toolbar);

appBarLayout = ( AppBarLayout ) findViewById( R . id . appbar);

/**

* Displays home back button and enables back pressed behavior.

protected void setupToolbar () <

setSupportActionBar(toolbar);

if (getSupportActionBar() != null ) <

getSupportActionBar() . setDisplayHomeAsUpEnabled( true );

getSupportActionBar() . setDisplayShowTitleEnabled( false );

toolbar . setNavigationOnClickListener( new View . OnClickListener () <

@Override

public void onClick ( View v ) <

onBackPressed();

>);

/**

* Sets a < @link AppBarLayout.OnOffsetChangedListener>to the AppBar and notifies when

* offset change and is less than 25.

protected void setupAppBar () <

appBarLayout . addOnOffsetChangedListener( new AppBarLayout . OnOffsetChangedListener () <

boolean isShow = false ;

int scrollRange = — 1 ;

@Override

public void onOffsetChanged ( AppBarLayout appBarLayout , int verticalOffset ) <

if (scrollRange == — 1 ) <

scrollRange = appBarLayout . getTotalScrollRange();

if (scrollRange + verticalOffset 25 ) <

onToolbarCollapsed( true );

isShow = true ;

> else if (isShow) <

onToolbarCollapsed( false );

isShow = false ;

>);

/**

* Shows a < @link Snackbar>with the message to show.

* @param message text to show.

protected void showMessage ( String message ) <

if (coordinatorLayout == null ) <

return ;

Snackbar . make(coordinatorLayout, message, Snackbar . LENGTH_LONG ) . show();

/**

* This method is NOT used by this class.

* @param isCollapsed state of toolbar.

protected abstract void onToolbarCollapsed ( boolean isCollapsed );

/**

* Retrieves a custom activity title for display on toolbar.

* @return activity title.

protected abstract String getActivityTitle ();

/**

* This method is needed to retrieve information a set the current activity information.

* It could be necessary to implement a extra method to update the UI.

protected abstract void setInformationData ();

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