AsymmetricGridView

An Android custom ListView that implements multiple columns and variable sized elements.

Please note that this is currently in a preview state. This basically means that the API is not fixed and you should expect changes between releases.

Sample application:

Try out the sample application on Google Play

Screenshots:

screenshot 1 screenshot 2 screenshot 3 screenshot 4

Usage

Version 2.0.0 includes a major breaking change to the AsymmetricGridViewAdapter. You now provide your own adapter to the AsymmetricGridViewAdapter constructor instead of extending it.

In your build.gradle file:

dependencies {
    implementation 'com.felipecsl.asymmetricgridview:library:2.0.1'
}

In your layout xml:

<com.felipecsl.asymmetricgridview.library.widget.AsymmetricGridView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

In your activity class:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    listView = (AsymmetricGridView) findViewById(R.id.listView);

    // Choose your own preferred column width
    listView.setRequestedColumnWidth(Utils.dpToPx(this, 120));
    final List<AsymmetricItem> items = new ArrayList<>();

    // initialize your items array
    adapter = new ListAdapter(this, listView, items);
    AsymmetricGridViewAdapter asymmetricAdapter =
        new AsymmetricGridViewAdapter<>(this, listView, adapter);
    listView.setAdapter(asymmetricAdapter);
}

Whenever your adapter changes (add or remove items), the grid will automatically reflect those changes by subscribing to your adapter changes.

Toggle to enable/disable reordering of elements to better fill the grid

// Setting to true will move items up and down to better use the space
// Defaults to false.
listView.setAllowReordering(true);

listView.isAllowReordering(); // true

Snapshots of the development version are available in Sonatype's snapshots repository.

Works with Android 2.3.x and above.

Caveats

Currently only has good support for items with rowSpan = 2 and columnSpan = 2. In the near future it will support different layout configurations.
It will work best if you don't have too many items with different sizes. Ideally less than 20% of your items are of special sizes, otherwise the library may not find the best way to accommodate all the items without leaving a lot of empty space behind.
Row layout is too complex, with many nested LinearLayouts. Move to a more flat layout with a custom ViewGroup possibly.

Contributing