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Question

I want to set Horizontal RecyclerView with 4 items in it. Items should appear in center of the screen. Each item has a fixed height and width. I want to place all items in center and make my RecyclerView match_parent. What I achieved is using wrap_content to RecyclerView. But if give match_parent to recyclerView all items appear from left not in center. But I want all items in center of the screen with match_parent recylcerView.

Here is what I am doing:

<android.support.v7.widget.RecyclerView
                android:id="@+id/recyclerDragDrop"
                android:layout_width="wrap_content"
                android:layout_height="100dp"
                android:layout_gravity="bottom|center_horizontal">

Item:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/llContainer"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="bottom"
    android:gravity="bottom"
    android:visibility="visible">

    <ImageView
        android:id="@+id/imgContainer"
        android:layout_width="56dp"
        android:layout_height="90dp"
        android:layout_gravity="bottom"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:scaleType="fitXY"
        android:src="@drawable/tube_delete"
        android:visibility="visible" />
</LinearLayout>

Java:

final ContainerItemAdapter mAdapter = new ContainerItemAdapter(MainActivity.this, containers, this, mLayoutManager);
        ItemTouchHelper.Callback callback =
                new EditItemTouchHelperCallback(mAdapter);
        mItemTouchHelper = new ItemTouchHelper(callback);
        mItemTouchHelper.attachToRecyclerView(mRecyclerContainer);
        mAdapter.setOnItemClickListener(new ContainerItemAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(View view, int position) {
                showToastLay(position);
            }
        });
        mRecyclerContainer.setAdapter(mAdapter);

With above code all my items appear in middle of the screen because my recyclerview is in center and has a wrap_content property.

But why I need my RecyclerView match_parent?

I am using RecyclerView's Drag and Drop functionality by using ItemTouchHelper classes. Now, whenever I drag any item to end of recyclerview that item start disappering from screen or we can say item doesn't drag untill the screen width. I want my items to drag until screen width or it should stop dragging whenever item reaches recyclerview's width. If I give match parent to my recyclerview then drag works fine but it shows all items from left of the screen not in center and I want all my items to show in center of the screen.

Please let me know if there is any solution available.

Thanks!

As I am using drag and drop

Answer 1

Try the column item fill the width of the column while centering everything inside:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:layout_width="match_parent"
          android:layout_height="180dp"
          android:orientation="vertical"
          android:padding="4dp">

<ImageView
    android:id="@+id/movie_column_photo"
    android:layout_width="80dp"
    android:layout_height="120dp"
    android:layout_gravity="center_horizontal"/>

<TextView
    android:id="@+id/movie_column_title"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"/>
</LinearLayout>

it helps you