techyourchance

public abstract class BaseBusyObservable<LISTENER_CLASS> extends BaseObservable<LISTENER_CLASS> {

    private final AtomicBoolean mIsBusy = new AtomicBoolean(false);

    public final boolean isBusy() {
        return mIsBusy.get();
    }

    /**
     * Atomically assert not busy and become busy

techyourchance

public abstract class BaseObservable<LISTENER_CLASS> {

    private final Object MONITOR = new Object();

    private final Set<LISTENER_CLASS> mListeners = new HashSet<>();

    public void registerListener(LISTENER_CLASS listener) {
        synchronized (MONITOR) {
            boolean hadNoListeners = mListeners.size() == 0;
            mListeners.add(listener);

techyourchance

public enum MyPermission {
    // declare runtime permissions specific to your app here (don't keep unused ones)
    READ_PHONE_STATE(Manifest.permission.READ_PHONE_STATE),
    FINE_LOCATION(Manifest.permission.ACCESS_FINE_LOCATION);

    public static MyPermission fromAndroidPermission(String androidPermission) {
        for (MyPermission permission : MyPermission.values()) {
            if (permission.getAndroidPermission().equals(androidPermission)) {
                return permission;
            }

techyourchance

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.regex.*;
import java.util.Arrays;
import java.util.Collection;