Android: GridLayout size and View.GONE behaviour

The solution would be to use RecyclerView along with GridLayoutManager. The key is to notify adapter about the changes to deleted items by using notifyItemRemoved. There is lots of room for customization in RecyclerViews, such as nice animations for disappearing items, rearrangement of remaining items on the screen, item decorations and etc. You can apply all these customization and additional logic around deletion of the items as needed for your particular problem.

Activity

public class MainActivity extends AppCompatActivity {
    RecyclerView recyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        List<String> dataSet = getSampleDataSet();
        recyclerView = (RecyclerView) findViewById(R.id.grid);
        recyclerView.setAdapter(new MyAdapter(dataSet));
        recyclerView.setLayoutManager(new GridLayoutManager(getApplicationContext(), 2));
    }

    private List<String> getSampleDataSet() {
        List strings = new ArrayList();
        strings.add("one");
        strings.add("two");
        strings.add("three");
        strings.add("four");
        strings.add("five");
        strings.add("six");

        return strings;
    }
}

Adapter

public class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
    List<String> dataSet;



    public MyAdapter(List<String> dataSet) {
        this.dataSet = dataSet;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        TextView tileView = (TextView) LayoutInflater.from(parent.getContext()).inflate(R.layout.grid_item, parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(tileView);

        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, final int position) {
        holder.view.setText(dataSet.get(position));

        holder.view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dataSet.remove(position);
                notifyItemRemoved(position); // this notifies the adapter about item being removed
            }
        });

    }

    @Override
    public int getItemCount() {
        return dataSet.size();
    }
}


class MyViewHolder extends RecyclerView.ViewHolder {
    TextView view;

    public MyViewHolder(TextView itemView) {
        super(itemView);
        view = itemView;
    }
}

Activity Layout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/grid"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

Grid Item

<?xml version="1.0" encoding="utf-8"?>
<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridItem"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:background="@color/colorPrimary"
    android:textColor="@android:color/white"
    android:gravity="center"
    android:text="Tile"/>

Results
Before:
Before

After click on 4. On an actual device, you will be able to see a nice framework animation for this action.

After

Solve same problem as:

package ua.vsgroup.widgets;

import android.content.Context;
import android.support.v7.widget.GridLayout;
import android.util.AttributeSet;
import android.view.View;

public class vsGridLayout extends GridLayout {

    View[] mChild = null;

    public vsGridLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public vsGridLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public vsGridLayout(Context context) {
        this(context, null);
    }

    private void arrangeElements() {

        mChild = new View[getChildCount()];
        for (int i = 0; i < getChildCount(); i++) {
            mChild[i] = getChildAt(i);
        }

        removeAllViews();
        for (int i = 0; i < mChild.length; i++) {
            if (mChild[i].getVisibility() != GONE)
                addView(mChild[i]);
        }
        for (int i = 0; i < mChild.length; i++) {
            if (mChild[i].getVisibility() == GONE)
                addView(mChild[i]);
        }

    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

        arrangeElements();
        super.onLayout(changed, left, top, right, bottom);

    }


}

If you don’t need turn the view visible again you can solve it removing the view from GridLayout.

private void hideView(View view) {
    GridLayout gridLayout = (GridLayout) view.getParent();
    for (int i = 0; i <  gridLayout.getChildCount(); i++) {
        if (view == gridLayout.getChildAt(i)) {
            gridLayout.removeViewAt(i);
            break;
        }
    }
}

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