PaNaVTEC

import android.widget.AbsListView;
import android.widget.ListView;

/**
 * Makes a listview to have a pull down, this is a wrapper.
 * Is not a good idea to override a ListView because there
 * are a lot of libraries and we dont know when we need one.
 */
public class PulldownListViewHelper {

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public class CustomGenerateViewId {
    private static final AtomicInteger nextGeneratedId = new AtomicInteger(1);
    public static int customGenerateViewId() {
        for (; ; ) {
            final int result = nextGeneratedId.get();
            // aapt-generated IDs have the high byte nonzero; clamp to the range under that.
            int newValue = result + 1;
            if (newValue > 0x00FFFFFF) {
                newValue = 1; // Roll over to 1, not 0.
            }

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public class OutlineTextView extends TextView {
    private static final int DEFAULT_OUTLINE_COLOR = 0xFF000000;
    private static final int DEFAULT_OUTLINE_SIZE = 7;
    private static final boolean DEFAULT_OUTLINE_STATE = true;

    private int outlineColor;
    private int outlineSize;
    private boolean outlineState;

    public OutlineTextView(Context context) {

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public class ObservableScrollView extends ScrollView {
    private static final int DEFAULT_THRESHOLD_DP = 4;
 
    private ScrollDirectionListener scrollDirectionListener;
    private int scrollThreshold;
 
    public ObservableScrollView(Context context) {
        this(context, null);
    }
 

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public class SafeStringUtils {
    public static boolean safeEquals(Object o1, Object o2) {
        return o1 != null && o1.equals(o2);
    }

    public static boolean safeEqualsIgnoreCase(String s1, String s2) {
        return s1 != null && s1.equalsIgnoreCase(s2);
    }

    public static boolean safeIsEmpty(String s) {

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int totalItems=10;

horizontalScrollView = (HorizontalScrollViewSelector) findViewById(R.id.horizontalScrollView);
horizontalScrollView.setListener(new HorizontalScrollViewSelector.OnScrollChangedListener() {
    @Override
    public void onScrollChanged(int totalX, int x) {
      items = x * totalItems / maxX);
    }
});

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public abstract class BaseActivity extends AppCompatActivity {
    private Toolbar toolbar;

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

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        if (toolbar != null) {

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public class RightAlignedHorizontalScrollView extends HorizontalScrollView {
    private static final boolean DEFAULT_GRAVITY_RIGHT = true;
    private static final boolean DEFAULT_AUTOSCROLL = true;

    private boolean autoScroll;
    private boolean gravityRight;

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

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public class PreferencesObjectHelper<T> {
  private static final String TAG = "PreferencesObjectHelper";

  private final SharedPreferences preferences;
  private final SharedPreferences.Editor editor;

  @SuppressLint("CommitPrefEdits")
  public PreferencesObjectHelper(Context context, String fileName) {
    preferences = context.getSharedPreferences(fileName, Context.MODE_PRIVATE);
    editor = preferences.edit();

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@IntDef({
    FIND_STREAK_LESS_THAN_ZERO, FIND_STREAK_LESS_EQUAL_TO_ZERO, FIND_STREAK_LESS_GREATER_ZERO
}) @Retention(RetentionPolicy.SOURCE) public @interface FIND_STREAK_OPERATOR {
}

public static final int FIND_STREAK_LESS_THAN_ZERO = 0;
public static final int FIND_STREAK_LESS_EQUAL_TO_ZERO = 1;
public static final int FIND_STREAK_LESS_GREATER_ZERO = 2;

public int findLongestStreak(float[] values, @FIND_STREAK_OPERATOR int operator) {