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You can use this class to realize a simple sectioned RecyclerView.Adapter without changing your code.

The RecyclerView should use a LinearLayoutManager. You can use this code also with the TwoWayView with the ListLayoutManager (https://github.com/lucasr/twoway-view)

This is a porting of the class SimpleSectionedListAdapter provided by Google

Example:

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public class IntroActivity extends ActionBarActivity {

    private ViewPager mViewPager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.intro_layout);

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="np.gov.mof.budget">
  
    <!-- for internet -->
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  
    <!-- sd card read/write -->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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private void takeScreenshot() {
    Date now = new Date();
    android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

    try {
        // image naming and path  to include sd card  appending name you choose for file
        String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

        // create bitmap screen capture
        View v1 = getWindow().getDecorView().getRootView();//inside acitivity

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public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {
  RadioGroup group1, group2, group3, group4;

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //referenced from http://www.tutorialforandroid.com/2009/11/select-radiobutton-from-multiple.html
       

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public class ImageSlider {
    private String name;

    //optional @DrawableRes
    @DrawableRes
    private int resId;

    public ImageSlider(String name, int resId) {
        this.name = name;
        this.resId = resId;

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interface AutoUpdatableAdapter {
    fun <T> RecyclerView.Adapter<*>.autoNotify(old: List<T>, new: List<T>, compare: (T, T) -> Boolean) {
        val diff = DiffUtil.calculateDiff(object : DiffUtil.Callback() {

            override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
                return compare(old[oldItemPosition], new[newItemPosition])
            }

            override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
                return old[oldItemPosition] == new[newItemPosition]

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import android.graphics.Rect;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

public class EqualSpacingItemDecoration extends RecyclerView.ItemDecoration {
  private final int spacing;
  private int displayMode;

  public static final int HORIZONTAL = 0;

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{"valid":true,"message":"Login Successful","user_id":"1"}

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public class Utils {
  
  public static String getZplCode(Bitmap bitmap, Boolean addHeaderFooter) {
        ZPLConverter zp = new ZPLConverter();
        zp.setCompressHex(true);
        zp.setBlacknessLimitPercentage(50);
        Bitmap grayBitmap = toGrayScale(bitmap);
        return zp.convertFromImage(grayBitmap, addHeaderFooter);
    }