Android GigaTech

Keeping your app up-to-date on your users’ devices enables them to try new features, as well as benefit from performance improvements and bug fixes. Although some users enable background updates when their device is connected to an unmetered connection, other users may need to be reminded to update. In-app updates is a Play Core library feature that introduces a new request flow to prompt active users to update your app. Add this in dependencies{ implementation ' com.google.android.play:core: 1.6 . 4 ' } In-app updates work only with devices running Android 5.0 (API level 21) or higher, and requires you to use Play Core library 1.5.0 or higher. After meeting these requirements, your app can support the following UX for in-app updates: Flexible Immediate   Flexible A user experience that provides background download and installation with graceful state monitoring. This UX is appropriate when it’s acceptable for the user to use the app while downloading t...

Connecting raspberry with the firebase using the python. I will code here how to upload the images or some data to firesebase using python. Sample code to upload images and data to firebase is there in github : https://github.com/yuvaraj119/IOT-Firebase-Python  First install pyrebase from https://pypi.org/project/Pyrebase/ Now we are good to go with code. import pyrebase import uuid from uuid import getnode as get_mac import getpass import datetime import os config = { "apiKey":"", #get api key from firebase "authDomain":"", #firebase app auth url "databaseURL": "", #add yout db url from firebase where your data is gonna store "storageBucket": "" #storage bucket url from firebase storage } firebase = pyrebase.initialize_app(config) db = firebase.database() storage = firebase.storage() is_session=False #creating unique name for session and device uid_str = uuid.uuid5(uuid.NAM...

A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch the thumb and drag left or right to set the current progress level or use the arrow keys. Placing focusable widgets to the left or right of a SeekBar is discouraged. SeekBar support only int values for progress: void setMax(int max) Set the upper range of the progress bar max. void setMin(int min) Set the lower range of the progress bar to min. void setProgress(int progress) Sets the current progress to the specified value. int getMax() Return the upper limit of this progress bar's range. int getMin() Return the lower limit of this progress bar's range. int getProgress() Get the progress bar's current level of progress. In some scenario we would need floating point seekbar progress, which is not supported by default in android. Here the floating seekbar which supports floating point value: You can download the full sample and library from https://github.com/yuvaraj119/Cus...

I was searching for good image burner for writing SD card for Raspberry Pi this was first time i am gonna use Raspberry Pi and i don't wanna it to go in wrong way. I searched for tool which is easier and smarter which is the Etcher i come to know about this. https://etcher.io/ I liked the look of Etcher’s clean and simple interface which is platform independent works on any platform. Its simple 3 step interface:  STEP 1: You browse to the image file from your system. Select a drive SD card or USB drive.  Now lets hit the Flash button to start the burning image on SD card or USB drive. STEP 2:    Now wait for few minutes to burn the image on SD card or USB drive. Once its done it will start validating whether its burned correctly. STEP 3: Once the process has finished you have the option to burn the same image again or to choose a different image.   When selecting image files you can select IMG and ISO files as expected b...

Returns and Jumps Kotlin has three structural jump expressions: return . By default returns from the nearest enclosing function or anonymous function . break . Terminates the nearest enclosing loop. continue . Proceeds to the next step of the nearest enclosing loop. All of these expressions can be used as part of larger expressions: val s = person.name ?: return The type of these expressions is the Nothing type . Break and Continue Labels Any expression in Kotlin may be marked with a label . Labels have the form of an identifier followed by the @ sign, for example: abc@ , fooBar@ are valid labels (see the grammar ). To label an expression, we just put a label in front of it loop@ for (i in 1..100) { // ... } Now, we can qualify a break or a continue with a label: loop@ for (i in 1..100) { for (j in 1..100) { if (...) break@loop } } A break qualified with a label jumps to the execution point right after the loop marked with that label. A contin...

Control Flow If Expression In Kotlin, if is an expression, i.e. it returns a value. Therefore there is no ternary operator (condition ? then : else), because ordinary if works fine in this role. // Traditional usage var max = a if (a < b) max = b // With else var max: Int if (a > b) { max = a } else { max = b } // As expression val max = if (a > b) a else b if branches can be blocks, and the last expression is the value of a block: val max = if (a > b) { print("Choose a") a } else { print("Choose b") b } If you're using if as an expression rather than a statement (for example, returning its value or assigning it to a variable), the expression is required to have an else branch. When Expression when replaces the switch operator of C-like languages. In the simplest form it looks like this when (x) { 1 -> print("x == 1") 2 -> print("x == 2") else -> { // Note the...

Basic Types In Kotlin, everything is an object in the sense that we can call member functions and properties on any variable. Some types are built-in, because their implementation is optimized, but to the user they look like ordinary classes. In this section we describe most of these types: numbers, characters, booleans and arrays. Numbers Kotlin handles numbers in a way close to Java, but not exactly the same. For example, there are no implicit widening conversions for numbers, and literals are slightly different in some cases. Kotlin provides the following built-in types representing numbers (this is close to Java): Type Bit width Double 64 Float 32 Long 64 Int 32 Short 16 Byte 8 Note that characters are not numbers in Kotlin. Literal Constants There are the following kinds of literal constants for integral values: Decimals: 123 Longs are tagged by a capital L : 123L Hexadecimals: 0x0F Binaries: 0b00001011 NOTE: Octal literals a...

ExifInterface is a class for reading and writing Exif tags in a JPEG file or a RAW image file. Supported formats are: JPEG, DNG, CR2, NEF, NRW, ARW, RW2, ORF, PEF, SRW and RAF. Attribute mutation is supported for JPEG image files. In clear way we can say: Exif is a specification for supporting metadata in a file, mostly used for JPEG, TIFF, and other image formats. The TAG_-prefixed constants on ExifInterface identify common tags, though not every image will have every tag. Tags that are popular among developers include TAG_ORIENTATION (indicating the orientation of the camera when the image was captured) and the TAG_GPS_-prefixed family (for geotagging). With the release of the 25.1.0 Support Library, there's a new entry in the family: the ExifInterface Support Library. With significant improvements introduced in Android 7.1 to the framework's ExifInterface , it only made sense to make those available to all API 9+ devices via the Support Library's ExifInterf...

Android O introduces some improvements to help provide user control over the use of identifiers. These improvements include: limiting the use of device-scoped identifiers that are not resettable updating the Android O Wi-Fi stack in conjunction with changes to the Wi-Fi chipset firmware used by Pixel, Pixel XL and Nexus 5x phones to randomize MAC addresses in probe requests updating the way that applications request account information and providing more user-facing control Device identifier changes Here are some of the device identifier changes for Android O: Android ID In O, Android ID (Settings.Secure.ANDROID_ID or SSAID) has a different value for each app and each user on the device. Developers requiring a device-scoped identifier, should instead use a resettable identifier, such as Advertising ID , giving users more control. Advertising ID also provides a user-facing setting to limit ad tracking . Additionally in Android O: The ANDROID_ID value won...

Currently google has release the Flexbox which can be used for building flexible layouts using FlexboxLayout, it can be interpreted as an advanced LinearLayout because both layouts align their child views sequentially. For more detail on this flexbox-layout But here we are gonna work on Flexbox with RecyclerView. Flexbox with a large number of items in a scrollable container! Let's first see what are the Supported attributes / features comparison Due to some characteristics of the RecyclerView, some Flexbox attributes are not available/not implemented to the FlexboxLayoutManager. Here is a quick overview of the attributes/features comparison between the two containers. Attribute / Feature FlexboxLayout                FlexboxLayoutManager (RecyclerView) flexDirection flexWrap (except wrap_reverse ) justifyContent alignItems alignContent - layout_order - layout_fle...

How to compress the image without loosing the quality. You can compress the image just like whatsapp like quality. File externalFile = new File(Environment. getExternalStorageDirectory () , " ProfilePic /helloimg.jpg" ) ; Uri externaluri = Uri. parse (externalFile.getPath()) ; compressImage(externaluri.toString() , "helloimg" ) ; // Method to compress Image Compress image public String compressImage (String imageUri , String imagenameName) { String filePath = getRealPathFromURI(imageUri) ; String fileName = imagenameName ; Bitmap scaledBitmap = null; BitmapFactory.Options options = new BitmapFactory.Options() ; //by setting this field as true, the actual bitmap pixels are not loaded in the memory. Just the bounds are loaded. If //you try the use the bitmap here, you will get null. options. inJustDecodeBounds = true; Bitmap bmp = BitmapFactory. decodeFile (filePath...