You can implement the method in your recyclerView onMeasure.
First, create the java class AutofitRecyclerView
public class AutofitRecyclerView extends RecyclerView {
//private GridLayoutManager manager;
private StaggeredGridLayoutManager manager;
private int columnWidth = -1;
public AutofitRecyclerView(Context context) {
super(context);
init(context, null);
}
public AutofitRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public AutofitRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
if (attrs != null) {
int[] attrsArray = {
android.R.attr.columnWidth
};
TypedArray array = context.obtainStyledAttributes(attrs, attrsArray);
columnWidth = array.getDimensionPixelSize(0, -1);
array.recycle();
}
manager = new StaggeredGridLayoutManager(1, GridLayoutManager.VERTICAL);
setLayoutManager(manager);
}
@Override
protected void onMeasure(int widthSpec, int heightSpec) {
super.onMeasure(widthSpec, heightSpec);
if (columnWidth > 0) {
int spanCount = Math.max(1, getMeasuredWidth() / columnWidth);
manager.setSpanCount(spanCount);
}
}}
In your xlm layout file activity_main.xml
<yourpackagename.AutofitRecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="@dimen/column_width"
android:clipToPadding="false"/>
Then set the variable to the width of each item in the file size of the values folder values/dimens.xml
<resources>
<dimen name="column_width">250dp</dimen>
</resources>
It can be for different screen resolutions values-xxhdpi/dimens.xml
<resources>
<dimen name="column_width">280dp</dimen>
</resources>
In your activity in the onCreate event place the following code
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
recyclerView.addItemDecoration(new MarginDecoration(this));
recyclerView.setHasFixedSize(true);
recyclerView.setAdapter(new NumberedAdapter(50));
}
