ShimmerRecyclerView

ShimmerRecyclerView is an custom RecyclerView library based on Facebook's Shimmer effect for Android library and inspired from Sharish's ShimmerRecyclerView.

There is reason behind creating a separate library for ShimmerRecyclerView, most of libraries doesn't not support runtime switching of LayoutManager or shimmer layout resources. Secondly the other similar library is build upon Supercharge's ShimmerLayout which is I feel very less active in terms of release. So I came up with an alternative.

Demo

Change layout manager in runtime LinearLayoutManager to GridLayoutManager and Shimmer will adopt accordingly. Setup mShimmerRecyclerView.setItemViewType(ShimmerAdapter.ItemViewType) to change view type of Shimmer adapter.

Switching Layouts	Multiple Type Demo	Grid Demo

Download

To include ShimmerRecyclerView in your project, add the following to your dependencies:

app/build.gradle

dependencies {
   implementation 'com.facebook.shimmer:shimmer:0.5.0'
   implementation 'com.todkars:shimmer-recyclerview:0.4.1'
}

Usage

The following snippet shows how you can use Shimmer RecyclerView in your project.

Layout

<com.todkars.shimmer.ShimmerRecyclerView
    android:id="@+id/shimmer_recycler_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    app:shimmer_recycler_layout="@layout/list_item_shimmer_layout"
    app:shimmer_recycler_item_count="10" />

Activity

public class MainActivity extends Activity {
    
    private ShimmerRecyclerView mShimmerRecyclerView;
    
    //... other variables
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        mShimmerRecyclerView = findViewById(R.id.shimmer_recycler_view);
        
        mShimmerRecyclerView.setLayoutManager(new LinearLayoutManager(this),
            R.layout.list_item_shimmer_layout);
        
        mShimmerRecyclerView.setAdapter(adapter);
        
        // This is optional, use if no attributes are mentioned in layout xml resource.
        // WARNING: Setting Shimmer programmatically will obsolete all shimmer attributes.
        /* mShimmerRecyclerView.setShimmer(mShimmer); */
        
        /* Shimmer layout view type depending on List / Gird */
        mShimmerRecyclerView.setItemViewType((type, position) -> {
            switch (type) {
                case ShimmerRecyclerView.LAYOUT_GRID:
                    return position % 2 == 0
                            ? R.layout.list_item_shimmer_grid
                            : R.layout.list_item_shimmer_grid_alternate;

                default:
                case ShimmerRecyclerView.LAYOUT_LIST:
                    return position == 0 || position % 2 == 0
                            ? R.layout.list_item_shimmer
                            : R.layout.list_item_shimmer_alternate;
            }
        });
        
        mShimmerRecyclerView.showShimmer();     // to start showing shimmer
        
        // To stimulate long running work using android.os.Handler
        mHandler.postDelayed((Runnable) () -> {
            mShimmerRecyclerView.hideShimmer(); // to hide shimmer
        }, 3000);
    }
}

Attributes

Most of the attributes used for ShimmerRecyclerView are same as Facebook's ShimmerFrameLayout below is detail table:

Name	Attribute	Description
Shimmer Layout	shimmer_recycler_layout	Layout reference used for as shimmer base.
Shimmer Item Count	shimmer_recycler_item_count	Number of shimmers to be shown in list, default is 9.
Clip to Children	shimmer_recycler_clip_to_children	Whether to clip the shimmering effect to the children, or to opaquely draw the shimmer on top of the children. Use this if your overall layout contains transparency.
Colored	shimmer_recycler_colored	Whether you want the shimmer to affect just the alpha or draw colors on-top of the children.
Base Color	shimmer_recycler_base_color	If colored is specified, the base color of the content.
Highlight Color	shimmer_recycler_highlight_color	If colored is specified, the shimmer's highlight color.
Base Alpha	shimmer_recycler_base_alpha	If colored is not specified, the alpha used to render the base view i.e. the unhighlighted view over which the highlight is drawn.
Highlight Alpha	shimmer_recycler_highlight_alpha	If colored is not specified, the alpha of the shimmer highlight.
Auto Start	shimmer_recycler_auto_start	Whether to automatically start the animation when the view is shown, or not.
Duration	shimmer_recycler_duration	Time it takes for the highlight to move from one end of the layout to the other.
Repeat Count	shimmer_recycler_repeat_count	Number of times of the current animation will repeat.
Repeat Delay	shimmer_recycler_repeat_delay	Delay after which the current animation will repeat.
Repeat Mode	shimmer_recycler_repeat_mode	What the animation should do after reaching the end, either restart from the beginning or reverse back towards it.
Direction	shimmer_recycler_direction	The travel direction of the shimmer highlight: left to right, top to bottom, right to left or bottom to top.
Dropoff	shimmer_recycler_dropoff	Controls the size of the fading edge of the highlight.
Intensity	shimmer_recycler_intensity	Controls the brightness of the highlight at the center
Shape	shimmer_recycler_shape	Shape of the highlight mask, either with a linear or a circular gradient.
Tilt	shimmer_recycler_tilt	Angle at which the highlight is tilted, measured in degrees.
Fixed Width or Height	shimmer_recycler_fixed_width or shimmer_recycler_fixed_height	Fixed sized highlight mask, if set, overrides the relative size value.
Width or Height Ratio	shimmer_recycler_width_ratio or shimmer_recycler_height_ratio	Size of the highlight mask, relative to the layout it is applied to.

LICENSE

    ShimmerRecyclerView a custom RecyclerView library
    Copyright (C) 2019  Omkar Todkar <omtodkar@gmail.com>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see https://www.gnu.org/licenses/gpl.txt

Facebook Shimmer is published under BSD License