andreikastsiuk

Custom Logcat Color

• ASSERT -> #A800FF
• DEBUG -> #3D9D2A
• ERROR -> #D80D15
• INFO -> #003CC8
• VERBOSE -> #BBBBBB

andreikastsiuk

public class PositionUtils {
    public static float calculateHaversineDistance(double lat1, double lon1, double lat2, double lon2) {
        final double p = 0.017453292519943295;      // Math.PI / 180
        final double earthRad2 = 12742000f;         // 2 * R; R = 6371 km
        final double lat1p = lat1 * p;
        final double lat2p = lat2 * p;
        double a = 0.5 - Math.cos(lat2p - lat1p) / 2 +
                Math.cos(lat1p) * Math.cos(lat2p) *
                        (1 - Math.cos((lon2 - lon1) * p)) / 2;
        return (float) (earthRad2 * Math.asin(Math.sqrt(a)));

andreikastsiuk

private boolean checkPlayServices() {
        GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
        int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
        if (resultCode != ConnectionResult.SUCCESS) {
            if (apiAvailability.isUserResolvableError(resultCode)) {
                apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
                        .show();
            } else {
                Log.i(TAG, "This device is not supported.");
                finish();

andreikastsiuk

private static Integer[] bubble(Integer[] integers) {
		for (int curr = 0; curr < integers.length; ++curr) {
			for (int other = curr + 1; other < integers.length; ++other) {
				if (integers[curr] > integers[other]) {
					int tmp = integers[curr];
					integers[curr] = integers[other];
					integers[other] = tmp;
				}
			}
		}

andreikastsiuk

    private static volatile DoubleCheckedLockingSingleton sInstance;

    public static DoubleCheckedLockingSingleton getInstance() {
        if (sInstance == null) {
            synchronized (DoubleCheckedLockingSingleton.class) {
                if (sInstance == null) {
                    sInstance = new DoubleCheckedLockingSingleton();
                }
            }
        }

andreikastsiuk

import org.reactivestreams.Publisher;

import io.reactivex.Flowable;
import io.reactivex.FlowableTransformer;
import io.reactivex.Observable;
import io.reactivex.ObservableSource;
import io.reactivex.ObservableTransformer;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;

andreikastsiuk

public void openEmailAppsChooser() {
        Intent intent = new Intent(Intent.ACTION_SENDTO);
        intent.setData(Uri.parse("mailto:"));
        Intent chooser = Intent.createChooser(intent, "test1");
        if(intent.resolveActivity(getPackageManager()) != null) {
            startActivity(chooser);
        }
}

andreikastsiuk

Notification notification = new NotificationCompat.Builder(this);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    notification.setSmallIcon(R.drawable.icon_transperent);
    notification.setColor(getResources().getColor(R.color.notification_color));
} else { 
    notification.setSmallIcon(R.drawable.icon);
} 

andreikastsiuk

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
  ((ViewGroup) findViewById(R.id.llRoot)).getLayoutTransition()
          .enableTransitionType(LayoutTransition.CHANGING);
}

andreikastsiuk

class ArchLifecycleApp : Application(), LifecycleObserver {
    
    override fun onCreate() {
        super.onCreate()
        ProcessLifecycleOwner.get().lifecycle.addObserver(this)
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
    fun onAppBackgrounded() {
        Log.d("TAG", "App in background")