truedem

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

public static void staticMethod() {
    Context context = ApplicationBase.getContext();
}

truedem

package pk.minitodo.base;

/**
 * Created by PK on 11.10.2015.
 */
import android.content.Context;
import android.content.res.Resources;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;

truedem

// check if Realm db exist
RealmConfiguration config = getConfig();
if (new File(config.getPath()).exists()) {
  // exists
} else {
  // don't exists
}

// check if Realm is closed
if(realm.isClosed()) {

truedem

public class MainActivity extends BaseActivity implements FragmentManager.OnBackStackChangedListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
	getSupportFragmentManager().addOnBackStackChangedListener(this);

truedem

public static boolean isNetworkAvailable() {  

    // ConnectivityManager connectivityManager = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);

    ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}

truedem

DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();    
float dpHeight = displayMetrics.heightPixels / displayMetrics.density;
float dpWidth = displayMetrics.widthPixels / displayMetrics.density;

// variant, API 17+
Display display = context.getWindowManager().getDefaultDisplay();
DisplayMetrics realMetrics = new DisplayMetrics();
display.getRealMetrics(realMetrics);
float realWidth = realMetrics.widthPixels / realMetrics.density;
float realHeight = realMetrics.heightPixels / realMetrics.density;

truedem

// packageName = "com.example.yourapp"
public Boolean isAppRunning(String packageName) {
        ActivityManager activityManager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE); // this = context
        List<RunningAppProcessInfo> procInfos = activityManager.getRunningAppProcesses();
        for(int i = 0; i < procInfos.size(); i++) {
                if(procInfos.get(i).processName.equals(packageName)) {
                        // Toast.makeText(getApplicationContext(), "App " + packageName + " is running", Toast.LENGTH_LONG).show();
                        return true;
                }
        }

truedem

try {
  SSLContext.getInstance("TLSv1.2");
  ProviderInstaller.installIfNeeded(this);
} catch (GooglePlayServicesRepairableException e) {
  // Thrown when Google Play Services is not installed, up-to-date, or enabled
  // Show dialog to allow users to install, update, or otherwise enable Google Play services.
  GooglePlayServicesUtil.getErrorDialog(e.getConnectionStatusCode(), (Activity) context, 0);
} catch (GooglePlayServicesNotAvailableException e) {
  Log.e("SecurityException", "Google Play Services not available.");
} catch (Exception e) {

truedem

content.postDelayed(new Runnable() {
  @Override
  public void run() {
    if ((Build.VERSION.SDK_INT >= 17 && LWQSettingsActivity.this.isDestroyed()) || LWQSettingsActivity.this.isFinishing()) {
      return;
    }
    requestNewInterstitial();
  }
}, 1000);

truedem

// https://github.com/ReactiveX/RxJava/issues/1323#issuecomment-45149897
// thank you, akarnokd !

public class ThrottleNotFirst {
  public static void main(String[] args) throws Exception {
      for (int firstWait = 0; firstWait < 2; firstWait++) {
          PublishSubject<String> source = PublishSubject.create();

          PublishSubject<Observable<String>> immediates = PublishSubject.create();