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public class EventBus {

    private final Subject<Boolean, Boolean> eventBus = new SerializedSubject<>(PublishSubject.<Boolean>create());

    private EventBus() {
    }

    private static class SingleTonHelper {
        private static final EventBus INSTANCE = new EventBus();
    }

JosiasSena

// Rather than going one by one and unchecking each and every one, run this JS query from 
//the console on chrome or firefox that shows up after "inspecting the code" and then just 
// check the ones that you want after wards.

switches = document.getElementsByClassName("M0PRCSC-Rc-g M0PRCSC-Rc-h"); 

for(i = 0; i < switches.length; i++) {
    if (switches[i].getAttribute("aria-checked") == "false") {
        switches[i].click()
    }

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    /**
     * The calculation (value * scale + 0.5f) is a widely used to convert from dps to pixel units
     * based on density scale
     * see developer.android.com (Supporting Multiple Screen Sizes)
     */
    public static int convertDpToPixels(int dp, DisplayMetrics displayMetrics) {
        return Math.round(dp * ((displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT)));
    }

Note: to get the display metrics do: getContext().getResources().getDisplayMetrics();

JosiasSena

#!/usr/bin/env bash
for file in *; do mv "$file” "`echo $file | tr "[:upper:]" "[:lower:]"`"; done

JosiasSena

// without reflection
ClassName className = new ClassName();
className.unsubscribe();

// with reflection
Object className = ClassName.class.newInstance();
Method m = className.getClass().getDeclaredMethod("unsubscribe", new Class[0]);
m.invoke(className);

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/usr/libexec/java_home

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Generate KeyHash for Facebook SDK

1. First open a terminal (open a command prompt in windows).
2. Navigate in the terminal to the directory where your Android debug.keystore is stored.
3. Mostly it will located under “/Users/user_name/.android/” (In Windows will be C:\Documents and Settings\.android).
4. Once you are in the “.android” directory, run the following command.keytool -exportcert -alias androiddebugkey -keystore debug.keystore | openssl sha1 -binary | openssl base64


Note: “androiddebugkey” can be the username for the keystone file and “debug.keystore” can be the name of the keynote file 

1. When it prompts you for a password, type android and hit Enter

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final InputMethodManager inputMethodManager = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);

JosiasSena

    public static String getStringFromAssetFile(final Context context, final String filename) {
        final int MAX_BUFF = 1024 * 100;

        final InputStream is;
        final InputStreamReader isr;
        final BufferedReader br;
        String resultData = "";

        try {
            final AssetManager am = context.getAssets();

JosiasSena

    /**
     * Returns the current enabled/disabled status of the GPS provider.
     * <p/>
     * If the user has enabled GPS in the Settings menu, true
     * is returned otherwise false is returned
     */
    public static boolean isGpsEnabled(final Context context) {
        final LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
        return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
    }