I created a ViewGroup that extends RelativeLayout and adds support for rounded corners which you can find here: https://gist.github.com/jerrellmardis/9240278. This ViewGroup is used to display each cell in the grid. When the container initially displays all cells have nice rounded corners but as you scroll back and forth the some of the corners on the cells get clipped. Here's a couple screenshots to illustrate what I'm talking about.

Expected: https://dl.dropboxusercontent.com/u/93908706/Screenshot_2014-02-28-17-26-36.png

Actual: https://dl.dropboxusercontent.com/u/93908706/Screenshot_2014-02-28-17-26-55.png

The views that are affected seem a bit random. Here's my layout as well.

public class QuiltLayout extends FreeFlowLayoutBase implements FreeFlowLayout {

    private Context mContext;
    private HashMap<Object, FreeFlowItem> mProxies;
    private int mLargeItemSide;
    private int mRegularItemSide;

    public QuiltLayout(Context context) {
        mContext = context;
        mProxies = new HashMap<Object, FreeFlowItem>();
    }

    @Override
    public void setDimensions(int measuredWidth, int measuredHeight) {
        super.setDimensions(measuredWidth, measuredHeight);
        mRegularItemSide = mContext.getResources().getDimensionPixelSize(R.dimen.patch_width_1);
        mLargeItemSide = mContext.getResources().getDimensionPixelSize(R.dimen.patch_width_2);
    }

    @Override
    public void prepareLayout() {
        mProxies.clear();

        Section section = itemsAdapter.getSection(0);

        final float regularHeightHRatio = .4f;
        final float largeHeightHRatio = .6f;
        int h1 = Math.round(height * regularHeightHRatio);
        int h2 = Math.round(height * largeHeightHRatio);
        int xOffset = 0;

        for (int i = 0; i < section.getDataCount(); i++) {
            FreeFlowItem freeFlowItem = new FreeFlowItem();
            freeFlowItem.isHeader = false;
            freeFlowItem.itemIndex = i;
            freeFlowItem.itemSection = 0;
            freeFlowItem.data = section.getDataAtIndex(i);

            Rect r = new Rect();

            switch (i % 18) {
                case 0:
                    r.left = 0;
                    r.top = 0;
                    r.right = mLargeItemSide;
                    r.bottom = height;
                    break;
                case 1:
                    r.left = 2 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h1;
                    break;
                case 2:
                    r.left = 2 * mRegularItemSide;
                    r.top = h1;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
                case 3:
                    r.left = 3 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mLargeItemSide;
                    r.bottom = h2;
                    break;
                case 4:
                    r.left = 3 * mRegularItemSide;
                    r.top = h2;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
                case 5:
                    r.left = 4 * mRegularItemSide;
                    r.top = h2;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
                case 6:
                    r.left = 5 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h1;
                    break;
                case 7:
                    r.left = 5 * mRegularItemSide;
                    r.top = h1;
                    r.right = r.left + mLargeItemSide;
                    r.bottom = height;
                    break;
                case 8:
                    r.left = 6 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h1;
                    break;
                case 9:
                    r.left = 7 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mLargeItemSide;
                    r.bottom = height;
                    break;
                case 10:
                    r.left = 9 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h2;
                    break;
                case 11:
                    r.left = 9 * mRegularItemSide;
                    r.top = h2;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
                case 12:
                    r.left = 10 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h1;
                    break;
                case 13:
                    r.left = 10 * mRegularItemSide;
                    r.top = h1;
                    r.right = r.left + mLargeItemSide;
                    r.bottom = height;
                    break;
                case 14:
                    r.left = 11 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = h1;
                    break;
                case 15:
                    r.left = 12 * mRegularItemSide;
                    r.top = 0;
                    r.right = r.left + mLargeItemSide;
                    r.bottom = h2;
                    break;
                case 16:
                    r.left = 12 * mRegularItemSide;
                    r.top = h2;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
                case 17:
                    r.left = 13 * mRegularItemSide;
                    r.top = h2;
                    r.right = r.left + mRegularItemSide;
                    r.bottom = height;
                    break;
            }

            r.offset(xOffset, 0);
            freeFlowItem.frame = r;
            mProxies.put(section.getDataAtIndex(i), freeFlowItem);

            if (i % 18 == 17) xOffset += 14 * mRegularItemSide;
        }
    }

    @Override
    public HashMap<Object, FreeFlowItem> getItemProxies(int viewPortLeft, int viewPortTop) {
        Rect viewport = new Rect(viewPortLeft, viewPortTop, viewPortLeft + width, viewPortTop + height);
        HashMap<Object, FreeFlowItem> ret = new HashMap<Object, FreeFlowItem>();

        for (Map.Entry<Object, FreeFlowItem> entry : mProxies.entrySet()) {
            FreeFlowItem p = entry.getValue();
            if (Rect.intersects(p.frame, viewport)) {
                ret.put(entry.getKey(), p);
            }
        }

        return ret;

    }

    @Override
    public FreeFlowItem getFreeFlowItemForItem(Object item) {
        return mProxies.get(item);
    }

    @Override
    public int getContentWidth() {
        if (itemsAdapter == null)
            return 0;

        int sectionIndex = itemsAdapter.getNumberOfSections() - 1;
        Section s = itemsAdapter.getSection(sectionIndex);

        if (s.getDataCount() == 0)
            return 0;

        Object lastFrameData = s.getDataAtIndex(s.getDataCount() - 1);
        FreeFlowItem fd = mProxies.get(lastFrameData);

        return fd.frame.left + fd.frame.width();
    }

    @Override
    public int getContentHeight() {
        return height;
    }

    @Override
    public FreeFlowItem getItemAt(float x, float y) {
        return ViewUtils.getItemAt(mProxies, (int) x, (int) y);
    }

    @Override
    public boolean verticalScrollEnabled() {
        return false;
    }

    @Override
    public boolean horizontalScrollEnabled() {
        return true;
    }

    @Override
    public void setLayoutParams(FreeFlowLayoutParams params){ }
}

We encounted crash on calculation of edge effects. Divide by zero on below line.

mLeftEdge.onPull(viewPortX / (-overflingDistance));

http://crashes.to/s/1f8091cd688

N-03E, device sold in Japan with "Disney Mobile on docomo" brand, seems to return 0 for connfiguration.getScaledOverflingDistance() This can be done with customizing this constant of ViewConfiguration: http://tools.oesf.biz/android-4.0.4_r1.0/xref/frameworks/base/core/java/android/view/ViewConfiguration.java#224 .

Possible fix was on https://github.com/Comcast/FreeFlow/commit/003e8fc486f567b42881bec5770c2384c73d3924#diff-e7d010dace6714a20e845b07ba789fa6R1027 , but it was removed on https://github.com/Comcast/FreeFlow/commit/60c56fe0e9f644f979d84ebcdd190a042658257c#diff-c38b0300174165db5f03f319b3a71847L1122 .

Thanks!

Setting horizontalScrollEnabled() to false and setting the appropriate content width in getContentWidth() does not produce the desired effects when extending FreeFlowLayoutBase.

I have implemented OnItemClickListener for the FreeFlowContainer, and I have added few items into the container, both scroll container and clicking on the item working good, but the issue is when I drag down from the first item the click event fired, also when I drag up the last item, the click event fired.

Hi, I am using freeflowcontainer with VLayout, each item having an Image and caption under that, the height of the caption textview vary based on the amount of text populated into that, So I want to extend the height of each freeflowitem based on caption height, please help, thanks

I've added the gradle wrapper and other necessary config files. It's been tested with both Android Studio and Eclipse and working well. (I just sent my signed CLA email :smile: )

There is no offscreen buffer at the moment. A concrete example of where this can be seen is when an imageview that contains a network image moves off screen by just a little bit, it has to reload the image every time it comes back on screen.

I think we should add this functionality to the container class, possibly as a pixel count buffer, or row/column count buffer. The problem with row/column count is that that only makes sense for rectangular layouts (something that is not a requirement).

I am trying to implement the library but I got my head stuck on this issue can you please point me out what I am doing wrong ?

That's the debug info

03-07 11:29:00.979    1755-1755/com.project.app E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.project.app, PID: 1755
    java.lang.NullPointerException
            at com.comcast.freeflow.core.FreeFlowContainer.getViewChanges(FreeFlowContainer.java:615)
            at com.comcast.freeflow.core.FreeFlowContainer.moveViewport(FreeFlowContainer.java:1064)
            at com.comcast.freeflow.core.FreeFlowContainer.moveViewportBy(FreeFlowContainer.java:1004)
            at com.comcast.freeflow.core.FreeFlowContainer.onTouchEvent(FreeFlowContainer.java:848)
            at android.view.View.dispatchTouchEvent(View.java:7706)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2210)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1945)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2216)
            at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1959)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2068)
            at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1515)
            at android.app.Activity.dispatchTouchEvent(Activity.java:2458)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2016)
            at android.view.View.dispatchPointerEvent(View.java:7886)
            at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3954)
            at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3833)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3449)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3418)
            at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3525)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3426)
            at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3582)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3449)
            at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3418)
            at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3426)
            at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3399)
            at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5602)
            at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5582)
            at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5553)
            at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5682)
            at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
            at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
            at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
            at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:5655)
            at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:5701)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
            at android.view.Choreographer.doCallbacks(Choreographer.java:574)
            at android.view.Choreographer.doFrame(Choreographer.java:542)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispat

Here is my Fragment

package com.project.app.fragments;

import android.app.Activity;
import android.content.Context;
import android.graphics.Point;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.comcast.freeflow.core.AbsLayoutContainer;
import com.comcast.freeflow.core.FreeFlowContainer;
import com.comcast.freeflow.core.FreeFlowItem;
import com.comcast.freeflow.core.Section;
import com.comcast.freeflow.core.SectionedAdapter;
import com.comcast.freeflow.layouts.FreeFlowLayout;
import com.comcast.freeflow.layouts.VGridLayout;
import com.comcast.freeflow.layouts.VLayout;
import com.koushikdutta.urlimageviewhelper.UrlImageViewHelper;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.JsonHttpResponseHandler;
import com.loopj.android.http.RequestParams;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

import de.keyboardsurfer.android.widget.crouton.Configuration;
import de.keyboardsurfer.android.widget.crouton.Crouton;
import de.keyboardsurfer.android.widget.crouton.Style;
import com.project.app.R;
import com.project.app.models.Event;
import com.project.app.models.Photo;
import com.project.app.models.User;
import com.project.app.models.Venue;
import com.project.app.ui.ArtbookLayout;
import com.project.app.utils.Fields;

public class VenueGalleryFragment extends Fragment {
    Activity venueActivity;
    FreeFlowContainer ffContainer;
    ArtbookLayout custom;
    FreeFlowLayout[] layouts;
    VenuePhotosListAdapter adapter;
    Venue venue;
    AsyncHttpClient client;
    RequestParams photosParams;
    User currentUser;
    List<Photo> photos = new ArrayList<Photo>();

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_venue_gallery, container, false);
        venue = (Venue) venueActivity.getIntent().getExtras().getSerializable("venue");

        ffContainer = (FreeFlowContainer) rootView.findViewById(R.id.ffcGallery);
        Display display = venueActivity.getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);

        custom = new ArtbookLayout();
        layouts = new FreeFlowLayout[]{custom};

        // Get the images
        client = new AsyncHttpClient();
        client.setTimeout(Fields.DEFAULT_TIMEOUT);
        currentUser = User.currentUser();
        photosParams = new RequestParams();

        adapter = new VenuePhotosListAdapter(venueActivity);
        ffContainer.setLayout(layouts[0]);
        ffContainer.setAdapter(adapter);

        client.get(Fields.GRAPH_VENUES_URL + "/" + venue.venueId + "/photos", photosParams, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(int statusCode, JSONObject response) {
                venueActivity.setProgressBarIndeterminateVisibility(Boolean.FALSE);
                try {
                    JSONArray photosArray = response.getJSONArray("photos");
                    for (int i = 0; i < photosArray.length(); i++) {
                        JSONObject photo = photosArray.getJSONObject(i);
                        photos.add(Photo.fromJson(photo));
                    }

                } catch (JSONException e) {
                    e.printStackTrace();
                }
                adapter.update(photos);
                ffContainer.dataInvalidated();
                ffContainer.setOnItemClickListener(new AbsLayoutContainer.OnItemClickListener() {
                    @Override
                    public void onItemClick(AbsLayoutContainer parent, FreeFlowItem proxy) {

                    }
                });

                ffContainer.addScrollListener( new FreeFlowContainer.OnScrollListener() {

                    @Override
                    public void onScroll(FreeFlowContainer container) {
                    }
                });
            }
        });

        return rootView;
    }

    protected class VenuePhotosListAdapter implements SectionedAdapter {

        private Context context;
        private Section section;

        public VenuePhotosListAdapter(Context context) {
            this.context = context;
            section = new Section();
            section.setSectionTitle("Pics");
        }

        public void update(List<Photo> photos){

            for(Photo o : photos){
                section.getData().add(o);
            }
        }
        @Override
        public long getItemId(int section, int position) {
            return section * 1000 + position;
        }

        @Override
        public View getItemView(int sectionIndex, int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(context).inflate(R.layout.list_item_pic_view, parent, false);
            }
            ImageView img = (ImageView) convertView.findViewById(R.id.pic);
            Photo p = (Photo) (section.getData().get(position));
            UrlImageViewHelper.setUrlDrawable(img, p.imageUrl, getResources().getDrawable(R.drawable.logo));
            return convertView;
        }

        @Override
        public View getHeaderViewForSection(int section, View convertView,
                                            ViewGroup parent) {
            return null;
        }

        @Override
        public int getNumberOfSections() {
            if(section.getData().size() == 0) return 0;
            return 1;
        }

        @Override
        public Section getSection(int index) {
            return section;
        }

        @Override
        public Class[] getViewTypes() {
            return new Class[] { LinearLayout.class };
        }

        @Override
        public Class getViewType(FreeFlowItem proxy) {
            return LinearLayout.class;
        }

        @Override
        public boolean shouldDisplaySectionHeaders() {
            return false;
        }

    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        venueActivity = activity;
    }

}

The setAlpha() operation is optimized in certain circumstances by the framework which helps during scrolling. This should be removed since the container cannot assume that the setAlpha() call will be optimized by the framework for the given view.

• With a Container with a VLayout and vertical scroll position already set to 0, pull down.
• A small gap appears on top
• Without lifting your finger, change the scroll direction to horizontal.
• Lift up the finger
• Bug: The gap remains (List doesn't bounce back)

Steps:

• set a new layout
• call data invalidated in next line
• shouldRecalculateScrollWhenComputingLayout will be set to false even though it should recalculate the viewport because of layout change

Hi! I have noticed that if i set a clicklistener on a element inside the view the scroll is blocked. Is possibile to propagate the touch to the flowcontainer????

Hi,

I imported FreeFlow using jitpack and everything on building is okay but while I'm trying to debug my app UNEXPECTED TOP-LEVEL EXCEPTION will be thrown.

Information:Gradle tasks [:app:assembleDebug]
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAfollestadMaterialDialogs0781Library UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72221Library UP-TO-DATE
:app:prepareComAndroidSupportDesign2221Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72221Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42221Library UP-TO-DATE
:app:prepareComDaimajiaSliderLibrary115Library UP-TO-DATE
:app:prepareComGithubComcastFreeFlowV06Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesBase750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesLocation750Library UP-TO-DATE
:app:prepareComGoogleAndroidGmsPlayServicesMaps750Library UP-TO-DATE
:app:prepareComOrhanobutHawk118Library UP-TO-DATE
:app:prepareComSoundcloudAndroidAndroidCrop100Library UP-TO-DATE
:app:prepareDeHdodenhofCircleimageview130Library UP-TO-DATE
:app:prepareIoReactivexRxandroid101Library UP-TO-DATE
:app:prepareMeGujunAndroidTaggroupLibrary14Library UP-TO-DATE
:app:preparePlCharmasAndroidAndroidReactiveLocation07Library UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources UP-TO-DATE
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJava UP-TO-DATE
:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources UP-TO-DATE
:app:preDexDebug UP-TO-DATE
:app:dexDebug
UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompatIcs;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:596)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:554)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:535)
    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:189)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:454)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:303)
    at com.android.dx.command.dexer.Main.run(Main.java:246)
    at com.android.dx.command.dexer.Main.main(Main.java:215)
    at com.android.dx.command.Main.main(Main.java:106)
Error:Execution failed for task ':app:dexDebug'.
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_80\bin\java.exe'' finished with non-zero exit value 2
Information:BUILD FAILED
Information:Total time: 8.212 secs
Information:1 error
Information:0 warnings
Information:See complete output in console

My current dependencies are

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')

    compile 'com.android.support:support-v4:22.2.1'
    compile 'com.android.support:design:22.2.1'
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.loopj.android:android-async-http:1.4.8'
    compile 'com.soundcloud.android:android-crop:1.0.0@aar'
    compile 'pl.charmas.android:android-reactive-location:0.7@aar'
    compile 'com.google.android.gms:play-services-location:7.5.0'
    compile 'io.reactivex:rxandroid:1.0.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.nineoldandroids:library:2.4.0'
    compile 'com.daimajia.slider:library:1.1.5@aar'
    compile 'com.orhanobut:hawk:1.18'
    compile 'com.mobsandgeeks:android-saripaar:2.0.2'
    compile 'de.hdodenhof:circleimageview:1.3.0'
    compile 'com.afollestad:material-dialogs:0.7.8.1'
    compile 'me.gujun.android.taggroup:library:1.4@aar'
    /*compile 'uk.co.ribot:easyadapter:1.5.0@aar'*/
    compile ('com.github.Comcast:FreeFlow:v-0.6'){
        exclude group: "com.android.support", module: "support-v4"
    }
}

I tried to exclude com.android.support library from the library but not worked. How can I fix this?

I found memory is growing and GC is running when FreeFlow is shown even if I didn't touch to the device. Allocation tracking says FreeFlow is computing layout constantly.

It was because FreeFlowContainer is placed in RelativeLayout and layout_above is used. (I placed LinearLayout with fixed height of 76dp, which contains Buttons, on the bottom of fragment.) For workaround I applied below diff to my xml file.

    <FreeFlowContainer
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:layout_alignParentTop="true"
-        android:layout_above="@id/footerButton"
+        android:layout_alignParentBottom="true"
+        android:layout_marginBottom="76dp"

This issue also causes bug that sometimes onItemSelected() is not called.

https://github.com/Comcast/FreeFlow/blob/96ebb0cc959ba0bfe5d8a8118aa9345550ff58c9/FreeFlow/src/com/comcast/freeflow/animations/DefaultLayoutAnimator.java#L108

FreeFlowContainer#notifyDataSetChanged() calls requestLayout() and redraw with backed adapter (computeLayout() and mLayout.prepareLayout()) in onMeasure().

• https://github.com/Comcast/FreeFlow/blob/96ebb0cc959ba0bfe5d8a8118aa9345550ff58c9/FreeFlow/src/com/comcast/freeflow/core/FreeFlowContainer.java#L276
• https://github.com/Comcast/FreeFlow/blob/96ebb0cc959ba0bfe5d8a8118aa9345550ff58c9/FreeFlow/src/com/comcast/freeflow/core/FreeFlowContainer.java#L255

But when requestLayout() is called while scrolling, onTouchEvent() is called before onMeasure() and it causes crash by IndexOutOfBoundsException in adapter implementation.

Note that ListView effectively avoids this problem by call layoutChildren() before applying scroll to view.

1. Set mDataChanged = true in notifyDataSetChanged(). https://github.com/android/platform_frameworks_base/blob/android-5.1.1_r4/core/java/android/widget/AdapterView.java#L809
2. Check mDataChanged and call layoutChildren() inTouchMove(). https://github.com/android/platform_frameworks_base/blob/android-5.1.1_r4/core/java/android/widget/AbsListView.java#L3763
3. Then redraw views with new data from mAdapter. https://github.com/android/platform_frameworks_base/blob/android-5.1.1_r4/core/java/android/widget/ListView.java#L1561