How to look android

How to detect Android application open and close: Background and Foreground events.

Dec 17, 2017 · 4 min read

This question seems to come up a lot. Especially if you are just starting out with Android developme n t. It’s simply because there is nothing obvious built into the Android SDK enabling developers to hook into application lifecycle events. Activities and Fragments have all the callbacks under the sun to detect lifecycle change, but there is nothing for the whole application. So how do you detect when a user backgrounds and foregrounds your app. This is an example of how your could detect Application lifecycle events. Feel free to adjust and enhance it to suit your needs, but this idea should be enough to work for most applications with one caveat, it will only work for Android API level 14+(IceCreamSandwich 🍦🥪).

Detecting App Lifecycle Evnts

Backgrounding

ComponentCallbacks2 — Looking at the documentation is not 100% clear on how you would use this. However, take a closer look and you will noticed the onTrimMemory method passes in a flag. These flags are typically to do with the memory availability but the one we care about is TRIM_MEMORY_UI_HIDDEN. By checking if the UI is hidden we can potentially make an assumption that the app is now in the background. Not exactly obvious but it should work.

Foregrounding

ActivityLifecycleCallbacks — We can use this to detect foreground by overriding onActivityResumed and keeping track of the current application state (Foreground/Background).

Implementing a Foreground and Background Handler

First, lets create our interface that will be implemented by a custom Application class. Something as simple as this:

Next, we need a class that is going to implement the ActivityLifecycleCallbacks and ComponentCallbacks2 we discussed earlier. So lets create an AppLifecycleHandler and implement those interfaces and override the methods required. And lets take an instance of the LifecycleDelegate as a constructor parameter so we can call the functions we defined on the interface when we detect a foreground or background event.

We outlined earlier that we could use onTrimMemory and the TRIM_MEMORY_UI_HIDDEN flag to detect background events. So lets do that now.

Add this into the onTrimMemory method callback body

So now we have the background event covered lets handle the foreground event. To do this we are going to use the onActivityResumed. This method gets called every time any Activity in your app is resumed, so this could be called multiple times if you have multiple Activities. What we will do is use a flag to mark it as resumed so subsequent calls are ignored, and then reset the flag when the the app is backgrounded. Lets do that now.

So here we create a Boolean to flag the application is in the foreground. Now, when the application onActivityResumed method is called we check if it is currently in the foreground. If not, we set the appInForeground to true and call back to our lifecycle delegate ( onAppForegrounded()). We just need to make one simple tweak to our onTrimMemory method to make sure that sets appInForeground to false.

Now we are ready to use our AppLifecycleHandler class.

AppLifecycleHandler

Now all we need to do is have our custom Application class implement our LifecycleDelegate interface and register.

And there you go. You now have a way of listening to your app going into the background and foreground.

This is only supposed to be used as an idea to adapt from. The core concept using onTrimMemory and onActivityResumed with some app state should be enough for most applications, but take the concept, expand it and break things out it to fit your requirements. For the sake of brevity I won’t go into how we might do multiple listeners in this post, but with a few tweaks you should easily be able to add a list of handlers or use some kind of observer pattern to dispatch lifecycle events to any number of observers. If anyone would like me to expand on this and provide a multi listener solution let me know in the comments and I can set something up in the example project on GitHub.

Update: Using Android Architecture Components

Thanks to Yurii Hladyshev for the comment.

If you are using the Android Architecture Components library you can use the ProcessLifecycleOwner to set up a listener to the whole application process for onStart and onStop events. To do this, make your application class implement the LifecycleObserver interface and add some annotations for onStop and onStart to your foreground and background methods. Like so:

Источник

How to look android

Official Octavi Os v3.1 | Android 12 | First Look | New Ui | Redmi 5 Plus | Redmi Note 5 | VinceПодробнее

Police Sim 2022 By @Ovilex Soft | First Look Gameplay | Android & iOSПодробнее

Police Sim 2022 Detailed Review Android Gameplay HD (By Ovilex) [FIRST LOOK]Подробнее

Police Sim 2022 — Android Gameplay [First Look]Подробнее

Samsung Galaxy A73 First Look, Android 12, 108MP OIS Camera, 8GB RAM | Price & Release DateПодробнее

Police Sim 2022 Ovilex — First Look Ultra HD Android GameplayПодробнее

ARK LEGENDS — Early Access (Android) First Look GameplayПодробнее

Star Wars Hunters | Android gameplay | First look | ReviewПодробнее

Postknight 2 (Android) First Look GameplayПодробнее

How to Play PS2 Games on Android! — AetherSX2 GuideПодробнее

Sweet Crossing Snake.oi|android game play|first look leco.Подробнее

Figure Fantasy (Android | iOs) Gameplay | First LookПодробнее

The FORGOTTEN Battle Royale Game for Android. (Not PUBG)Подробнее

Nokia 6600 future mobile new look Android mobile wonderful design🥰Подробнее

UNDECEMBER First Look Android Beta Gameplay _ Download APK Link1Подробнее

MIUI 13 ANDROID 12 TOP 5 SPECIAL FEATURES — FIRST LOOK | MIUI 13 INDIA UPDATE 🇮🇳Подробнее

Best Android Smartwatches — Winter 2021!Подробнее

Human-like robot «wakes up» as UK company unveils android AmecaПодробнее

The Spirit Of Wolf (Android) First Look GameplayПодробнее

How to transfer WhatsApp from Android to iPhone (100% WORKS)Подробнее

Источник

Basics of Android layouts and views

What is a ViewGroup?

A viewgroup is a parent class of all the views. It holds all the children views (and viewgroups) within, as depicted by the structure above.

Types of ViewGroups

• Absolute Layout
• By using an Absolute Layout, you can specify the exact locations (x/y coordinates) of its children.
• They are less flexible and harder to maintain, rarely used nowadays.
• One needs to remember too many coordinate values for placing a view at a position, it would rather be much easier to remember a view with respect to which one needs to place a view on screen.

• It is usually used to block out an area on the screen and display only a single child on screen.
• If multiple children are used within it then all the children are placed on top of each other.
• Position of children can only be controlled by assigning gravity to them.
• Usually used to display single fragments on screen.

• Aligns the children views either horizontally or vertically.
• The attribute android:orientation specifies wheher to horizontally or vertically align children views.
• We usually use the attribute android:weight in the children views/viewgroups to decide what percentage of the available space they should occupy.
• An attribute android:weightSum defines the maximum weight sum, and is calculated as the sum of the layout_weight of all the children if not specified explicitly.

TRIVIA : What would happen if the weightSum is less than the sum of weights given to children explicitly?

• Relative Layout enables you to specify how child views are positioned relative to each other.
• The position of each view can be specified as relative to sibling elements or relative to the parent.

Some common attribute usages in relative layout:
Difference between android:layout_alignRight and android:layout_toRightOf : android:layout_alignRight is used to align a view’s rightmost edge to the rightmost edge of the specified view, whereas android:layout_toRightOf is used to place a view to the right of the specified view ie the left edge of a view is postioned to the right of the specified view.

Why to prefer android:layout_toEndOf instead of android:layout_toRightOf :
The views have LTR(left-to-right) orientation by default ie they start from left and end towards their righ, butthis orientation can be changed to RTL(right-to-left) where views start from right and end towards left. In suchcses,the views with the attribute android:layout_toEndOf will correctly align to the end w.r.t the view specifiedwhereas android:layout_toRightOf will still align it towards the right.

• Read more about Relative Layout here and here.

TRIVIA: Relative Layout measures a view twice, whereas Linear Layout measures only once (if weights are not used)!
Sources: Stack Overflow and Medium

• Instead of specifying the width and height of a child, we can provide a percentage of screen width or height to use.
• It is very useful in scaling layouts to various screen sizes.
• The PercentSupportLayout supports two pre-built layout — PercentRelativeLayout and PercentFrameLayout .
• Find an example for this here.
• ScrollView
• It is a subclass of FrameLayout, as the name says it is used when your contents do not fit the screen and tend to overflow.
• ScrollView can hold only one direct child. This means that you need to wrap all your views into a single viewgroup in order to use it within a ScrollView.
• ScrollView only supports vertical scrolling. Use HorizontalScrollView if you want to have horizontal scrolling.
• It is advised not to use ScrollView with ListView , GridView and Recycler View as they take care of their own vertical scrolling.

Источник

How To Make Android Look

How To Make Your ANDROID Phone Look BEAUTIFUL | Minimalism Android Setup

Android is the king of customization, and we will see why. Find out how to transform your same-old UI into something simple, clean and minimalistic. Follow .

How to Make Any Android Phone Look Like A Pixel 4 XL (Demo Done On Galaxy Note 10+)

Pixel phones are generally known to have the best software of any phone. They have very good software. The hardware is usually lacking so taking some of the .

Make your Samsung Galaxy look like Stock Android! (2021)

I haven’t made an update to this in a while, so I think it’s about time. This is how I make my Samsung Galaxy phone look like Stock Android and how you can too!

How to Make Your Android Phone Look Like an iPhone #Shorts

Thank you for watching! Tools Used: https://amzn.to/3r9gibN My Blue Mat: https://amzn.to/37vGW6V Heat Gun: https://amzn.to/2WqDi84 Check us out on .

How to Get Samsung One UI Look on any Android Device // Get GALAXY S10 Look!

In this video I’ve shown you How to make any android device look like Samsung One UI // S10 Look on any android device. #oneui #galaxys10 .

iOS 15 On Android | Change Your Device Look Like iOS 15 | Complete Setup

Launcher iOS 15 — https://play.google.com/store/apps/details?id=com.luutinhit.ioslauncher&hl=en iCallScreen .

How to Get Android 12 Look on Any Android device | Android 12 Homescreen Setup

How to Get Android 12 Look on Any Android device,Get Android 12 Look,Android 12 Look on Any Android,Android 12 Look,Android 12 Homescreen Setup .

Make Android look and function like Windows 10 Mobile (2019)

As you may or may not know, I really love the Metro UI that Windows Phones used. So today, I will be showing you how to make Android look and function like .

iOS 14 On Android | Change Your Device Look Like iOS 14 | Complete Setup

Phone 13 Launcher, OS 15 — https://play.google.com/store/apps/details?id=com.launcher.ios11.iphonex&hl=en Notch Phone X .

how to make your android phone look aesthetic | minimal aesthetic android phone | homescreen edition

HOW TO MAKE YOUR ANDROID PHONE LOOK AESTHETIC & MINIMAL BY JASLEI TAMAYO SUBSCRIBE bit.ly/jasleitamayo aesthetic editing .

How To Make Android Look Like Windows Phone | Square Home Launcher (Review)

This is a review of the Square Home Launcher which is a free launcher application from the Google Play Store. It closely emulates Windows Phone 10 for .

How to make your android phone look like a ios phone? (Lockscreen and homescreen)

change android to iOS 15 — how to make android look like ios 15

Hi friends, nice to meet y’all. —————————————————————————— Please subscribe to my channel and hit the bell .

How To Make Your Photos Look Better | Android or iPhone

In this video I show you how to edit and make your photos quickly look better using the free snapseed app on either Android or iPhone. This process is fast and .

How to make your android look like Google Pixel?

Hello there everybody, and welcome to this episode on how to take any android device that you may have and make it look like the Google Pixel. This video is a .

How To Make Android Look Like iOS 11! (No Root — Free — 2017) — Install iOS 11 On Any Android Phone!

I just updated this video for 2018 here! — https://goo.gl/dJgJw8 Business Inquiries — sharpeyereviewsofficial@gmail.com Thanks for watching!

INSANE ANDROID Customization Tutorial — Make Your Android Phone Look STUNNING (2020)!

ARSquad #androidcustomization #setup Background Music: Epidemic Sound: http://share.epidemicsound.com/lS2fj Social: Instagram: .

How to make your Android look like Samsung Galaxy S7?

Hello there everybody, and welcome to this episode on how to take any android device that you may have and make it look like the Samsung Galaxy S7.

Android Dimensions and Devices: How to make your app look the same on every device?

In this video I explain how to manage Android Dimensions. If you like this video please subscribe. If you are looking for a new android job, have you considered .

Make android look like iOS 10!

GEAR I USE IN MY VIDEOS!: https://goo.gl/GEQ6z1 iOS 10 on any Android! Click here to enter my free iPhone 7 giveaway: http://bit.ly/2dacxzG Snapchat: .

Make Your Android Phone Look Like Windows XP/7/8/10 Desktop | Easy Method (100% Working)

In this Video, I will show you How to Make Your Android Phone Look Like Windows 10/8/7/XP Desktop | Easy Method (100% Working) App Link: .

HOW TO MAKE ANDROID LOOK LIKE GALAXY S8 ROUNDED CORNERS / ROUND CORNERS ON ANY ANDROID PHONE

HOW TO MAKE ANDROID LOOK LIKE GALAXY S8 ROUNDED CORNERS / ROUND CORNERS ON ANY ANDROID PHONE .

How to Make Any Android Phone Look Like the Pixel 2

If you’re not going to buy a Pixel 2 but are still slightly feeling the sting of jealousy at how clean the software looks on the new devices sold by Google themselves .

How to Make Your Android Look Dope!

Nova Launcher Prime: https://goo.gl/LDfGq Zooper Widget Pro: https://goo.gl/7cO6t Ocea Widget: https://goo.gl/5Y3fev MIN Icon Pack: https://goo.gl/mQlDmX .

iOS 14 on Android : How To Make Android Look Like iOS 14

Hi guys! This video will show how to Make Android look like iOS 14. Here’s how to make your Android look like iOS 14. Step 1. Home Screen .

How To Make Phone Look Cooler | Android Customization | Android Customization 2020 | Expert D

How To Make Phone Look Cooler | Android Customization | Android Customization 2020 | Expert D How To Customize Your Android Phone Like A Pro .

Make Your Android Interface Look Like iOS 10

Looking to get a taste of iOS without investing in an iPhone? Here’s our guide on getting your Android smartphone UI to look and feel just like iOS 10. Download .

How to Make your Android Look Like iOS 2018 — No Root

Just Install the Applications and you are ready to go. ALL APPS LISTED BELOW!: Lockscreen — https://goo.gl/SWSJlI iLauncher — https://goo.gl/xeeYMZ iNoty .

Make Android Look Like iOS! (2016)

In This video I will Show You How To make Your Android Look like IOS . ========================================= All Downloads: iLauncher — 2.42$ .

👍 (2020 FREE) How to Make Android looks like iOS 13 (NO ROOT) ᴴᴰ

Thanx 4 watching Hope you appreciate my efforts,If you did DO give this video like & subscribe. please, like us on: .

Get Iphone 12 Looks on Any Android Device | Android ko banao SASTA IPHONE😂 | Install OS14 On Android

Get Iphone 12 Looks on Any Android Device | Android ko banao SASTA IPHONE | Install OS14 On Android Downloading .

How to make your BORING ANDROID look like a BLACKBERRY!

Hey everyone! In this video I show you, how you can transform your normal android phone in to a BlackBerry Android device! Link to cobalt: .

How to make android look and feel like iOS 9 (WORKING)

This is an easy way to make any android device look and feel like iOS 9. IOS 9 released in 8th of June and it came with lots of new features from it. Unfortunately .

How to Make the Huawei P20 Look Like Stock Android

There is no doubt, that the Huawei P20 and the Huawei P20 Pro have some of the best hardware out there. EMUI on the other hand, well, isn’t the most .

Make Android Look Like iOS! (2016)

This is it! Make Android Look Like iOS ver. 4.0! This video was in VERY high demand, so here it is finally! This is also my 100th! ALL APPS LISTED BELOW!

How to Make Any Android Device Look Like Stock Android (without Root)

http://theunlockr.com/2013/09/14/how-to-make-any-android-device-look-like-stock-android-without-root-video/ Head to our site above for the necessary files or to .

How to make Android look like iPhone X! (iOS 11) 📱

How to make Android look like iPhone! (iOS 11) Hey guys! Please subscribe :’3 Ever wanted iPhone with the superpowers of an android? You are in for a treat .

HOW TO: Make your Samsung Galaxy S9 look like Stock Android!

DOWNLOAD Rootless Launcher = https://goo.gl/r1GjV3 DOWNLOAD Pixel Live Wallpapers APK = https://goo.gl/TFNrRM.

How To Install Windows 10 On Android | Make Your Android Look Like Windows Phone 10 [ NO Root ] 🔥

Dosto is video mai aapko raha hu ki kese aap badi asaani se apne android phone k ek windows phone 10 ke jesa bana sakye hai umeed hai ki aapko ye video .

How to make your Android look and feel like an iPhone

This is my first video. If you like please subscribe my channel and share.

Стали ФУТБОЛИСТАМИ на 24 ЧАСА !

БОЙКА против КИНГ КОНГА — Битва ГИГАНТОВ

ХУЖЕ BATTLEFIELD ЕЩЕ НЕ БЫЛО.

РЯДНАЯ ШЕСТЕРКА из двигателей от ЖИГИ — Приварили 2 цилиндра

Экстремальные Прятки От Охраны В Супермаркете!

Амиран Сардаров х Расул Чабдаров | ЧТО БЫЛО ДАЛЬШЕ?

[CHOREOGRAPHY] Jin of BTS ‘슈퍼 참치’ Special Performance Video

Меня трогали в темноте | Amnesia Rebirth

ХАГГИ ВАГГИ ВЫЛЕЧИЛ БРАТА ОТ ЗОМБИ ВИРУСА Poppy Playtime в ГТА 5 МОДЫ! ОБЗОР МОДА в GTA 5 ВИДЕО

Непосредственно Пицца Серго без инстаграма нашел работу. Новая серия

Непосредственно Каха подарок

Экстремальное ОГРАБЛЕНИЕ MORGENSHTERN!**МИНИ ВЕРСИЯ**

Лазарєв: Ми РОЗПИЛИ всі свої літаки Ту-160, а частину продали Росії. НАШ 04.12.21

슈퍼 참치 by Jin

НУБ И ПРО ПАРКУРЯТ ПО КАКТУСАМ В МАЙНКРАФТ ! НУБИК ПРОХОДИТ ПАРКУР И ТРОЛЛИНГ ЛОВУШКА В MINECRAFT

Хотите хорошо провести время за просмотром видео? На нашем видео портале вы найдете видеоролики на любой вкус, смешные видео, видео о животных, видео трансляции и многое другое

Источник