Tech – Page 3 – Igor Khrupin

Android Development

ProgressArcView implementation for Android

Would you like the same progress View? Here is source code for simple viewsion without customisation from XML. package com.hrupin.samples.roundanimation; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.os.Bundle; import android.os.Parcelable; import android.util.AttributeSet; import android.view.View; /** * Created by Igor Khrupin www.hrupin.com on 03-05-2017. */ Read more…

By Igor Khrupin, 8 years13 May, 2017 ago

Android Development

Android & Continuous Integration & HockeyApp

Hey! Here is the case. We need build Android application, test it using Continuous Integration. After that we need upload APK to HockeyApp. The first part is well known. So, how to upload APK to HockeyApp using command line? I’ll refer you to HockeyApp API. To make any interaction with Read more…

By Igor Khrupin, 8 years29 April, 2017 ago

Android Development

Calendar DayView for Android

I had to create logic which should arrange events properly on DayView timeline. I’ve researched many solutions in the internet and here is solution which can be easy implemented in Android. I’ve implemented this task visually like Google Calendar. Like this. Please have a look my solution. To draw the Read more…

By Igor Khrupin, 8 years29 April, 2017 ago

Android Development

Example usage of GeofencingApi in Android

GeofencingApi is great feature for making notifications when user enter to specific place on map and also exit from specific place. I’ve updated official GeofencingApi tutorial to make it more visual. Here application which able register geofence just after map click. Use it for register your place and test how Read more…

By Igor Khrupin, 8 years13 March, 2017 ago

Android Development

How to keep background activities in Xiaomi Redmi Note 3 with MIUI 8.1.3.0

If you see this post then you probably have problem with running Android Service or other background activity in Xiaomi Redmi Note 3 phone. MIUI ROM usually kill background activity after 5-10 minutes user inactivity. So, how to make applications with location based or other services works with MIUI. For Read more…

By Igor Khrupin, 8 years11 March, 2017 ago

Android Development

How to Dynamically or Programmatically Add Menu Items for an Android Activity

Sometimes you don’t need huge menu. And int is’t super important create XML file for it. You can just create your menu from code. It is very simple. You need override ` public boolean onPrepareOptionsMenu(Menu menu) ` method. Let’s see the example below: @Override public boolean onPrepareOptionsMenu(Menu menu) { menu.clear(); Read more…

By Igor Khrupin, 8 years4 March, 2017 ago

Android Development

Launch Battery Historian 2.1 on Mac

Android have great tool for tracking battery drain. It is Battery Historian. Here is simple steps how to get it on your Mac: Install Docker Run the next commands in Terminal docker pull gcr.io/android-battery-historian:2.1 docker — run -p 9999:9999 gcr.io/android-battery-historian:2.1 –port 9999 Open your http://localhost:9999 You will have Battery Historian ready Read more…

By Igor Khrupin, 8 years6 December, 2016 ago

Android Development

How to prevent screen capturing in Android

Prevent screen capturing is way for saving your content. Android SDK have special flag for it. https://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#FLAG_SECURE Just declare it in your Activity like this: @Override protected void onCreate(Bundle savedInstanceState) { getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ….. } And user will see next message when try make screenshot:

By Igor Khrupin, 8 years25 November, 2016 ago

Algorithms

QuickSort (qsort) Algorithm

Overview The quicksort algorithm was discovered by Tony Hoare in 1959. This algorithm is considered one of the fastest sorting algorithms and shows the best results in most cases. Here is the algorithm visualization. Below I will describe how it works. The algorithm works on the “divide and conquer” principle. Read more…

By Igor Khrupin, 8 years20 November, 2016 ago

Algorithms

Insertion Sort Algorithm

Insertion Sort appeared a long time ago. Intuitively, we use it to sort the cards in hand during card games. This is the easiest way to illustrate how this algorithm works. How the algorithm works Each element of the input sequence is scanned one at a time and compared with Read more…

By Igor Khrupin, 8 years20 November, 2016 ago