Android GridLayout with dynamic number of columns per row

You can use FlexboxLayoutManager

Add the following dependency to your build.gradle file:

implementation 'com.google.android:flexbox:1.0.0'

SAMPLE CODE

LAYOUT.XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <android.support.v7.widget.RecyclerView
      android:id="@+id/recyclerView"
      android:layout_width="match_parent"
      android:layout_height="250dp" />



</LinearLayout>

ACTIVTY CODE

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;

import com.google.android.flexbox.FlexDirection;
import com.google.android.flexbox.FlexboxLayoutManager;
import com.google.android.flexbox.JustifyContent;

import java.util.ArrayList;


public class MainActivity extends AppCompatActivity {

    RecyclerView recyclerView;
    ArrayList<String> arrayList = new ArrayList<>();
    DataAdapter adapter;

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

        recyclerView = findViewById(R.id.recyclerView);
        initArray();
        FlexboxLayoutManager layoutManager = new FlexboxLayoutManager(this);
        layoutManager.setFlexDirection(FlexDirection.COLUMN);
        layoutManager.setJustifyContent(JustifyContent.FLEX_END);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new DataAdapter(this, arrayList);
        recyclerView.setAdapter(adapter);

    }

    private void initArray() {

        arrayList.add("ioreeoe");
        arrayList.add("fghfgh");
        arrayList.add("ftyjyjhghgh");
        arrayList.add("jfgewrg");
        arrayList.add("rwrewr");
        arrayList.add("ghyjtyfghh");
        arrayList.add("gfhfgh");
        arrayList.add("gfhfht");
        arrayList.add("retretret");
        arrayList.add("retret");
        arrayList.add("ioreeoe");
        arrayList.add("fghfgh");
        arrayList.add("ftyjyjhghgh");
        arrayList.add("jfgewrg");
        arrayList.add("rwrewr");
        arrayList.add("ghyjtyfghh");
        arrayList.add("gfhfgh");
        arrayList.add("gfhfht");
        arrayList.add("retretret");
        arrayList.add("retret");
        arrayList.add("ioreeoe");
        arrayList.add("fghfgh");
        arrayList.add("ftyjyjhghgh");
        arrayList.add("jfgewrg");
        arrayList.add("rwrewr");
        arrayList.add("ghyjtyfghh");
        arrayList.add("gfhfgh");
        arrayList.add("gfhfht");
        arrayList.add("retretret");
        arrayList.add("retret");
    }

}

Adapter code

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by nilesh on 3/4/18.
 */

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {

    Context context;
    ArrayList<String> arrayList = new ArrayList<>();

    public DataAdapter(Context context, ArrayList<String> arrayList) {
        this.context = context;
        this.arrayList = arrayList;
    }

    @Override
    public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.custom_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(DataAdapter.ViewHolder holder, int position) {

        holder.title.setText(arrayList.get(position));
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView title;

        public ViewHolder(View itemView) {
            super(itemView);
            title = itemView.findViewById(R.id.nilu);
        }
    }
}

custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/nilu"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:background="@drawable/test"
        android:padding="10dp"
        android:textColor="#050505" />
</LinearLayout>

@drawable/test

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle"  >
            <corners android:radius="30dp"/>
            <solid android:color="#d10e0e"/>
            <stroke android:width="1dip" android:color="#070fe9" />
        </shape>
    </item>
</selector>

RESULT

![enter image description here

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