Questions tagged [android-api-levels]

Each Android version is assigned a unique integer identifier, called the API Level.

As the Android platform evolves and new Android versions are released, each Android version is assigned a unique integer identifier, called the API Level. Because users install apps on older as well as the most recent versions of Android, real-world Android apps must be designed to work with multiple Android API levels.

Each release of Android goes by multiple names:

  • The Android version, such as Android 4.4
  • The API level, such as "API Level 19"
  • A dessert name, such as "KitKat"

Each Android device supports exactly one API level – this API level is guaranteed to be unique per Android platform version. The API level exactly identifies the version of the libraries that your app can call into; it identifies the combination of manifest elements, permissions, etc. that you code against as a developer. Android's system of API levels helps Android determine whether an application is compatible with an Android system image prior to installing the application on a device. When an application is built, it contains the following API level information:

  • The target API level of Android that the app is built to run on.
  • The minimum API level of Android that is required to run the app.

These settings are used to ensure that the functionality needed to run the app correctly is available on the Android device at installation time. If not, the app is blocked from running on that device. For example, if the API level of an Android device is lower than the minimum API level that you specify for your app, the Android device will prevent the user from installing your app.

Source: https://developer.xamarin.com/guides/android/application_fundamentals/understanding_android_api_levels/

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Sending datas to any wifi device(Smart switch) from a mobile phone through wifi

I am trying to build an application that controls the smart switch wifi device. As far now i have created an app that lists the nearby wifi networks (it even displays the wifi signal of the smart switch device) and connects to them. I need to know…
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Android app doesn't work on Android api level above 20

Release build of an app is perfectly working on Android 4.0.3 and 4.4.2 which api levels are 15 and 19. But when I try to run it on android 5.0.1 and above it shows a grey screen only even without an appbar. I am using Google Maps, Microsoft Azure…
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SDK Manager doesn't show older APIs

I have installed android studio and android 5.0.1 (API 21) is installed I am unable to see older APIs. Please check the image below for reference. Please guide me suggestion how to install API 19 when its not shown in SDK Manager. SDK Manager after…
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Can app targeted Android 3.1 carry the old WebView whatever Android version is installed?

From Android 4.4 the WebView is changed, and from Android 7.0 it is Chrome engine and not the WebView. I see that my app is broken with newest Android versions because it uses many features of old WebView, it's targeted Android 3.1 and needs…
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Android API's and Http Connection Functions

What android API's work with the HttpPost function and what android API's work with the HttpURLConnection function? I'm trying to create Java code for an android app that calls a PHP file to connect with a database, and I want to make sure that my…
jerbear
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Synchronizing "SensorEvent.timestamp" with "System.nanoTime()" or "SystemClock.elapsedRealtimeNanos()"

The problem: I need to synchronize some data set time-stamped using System.nanoTime() with another one time-stamped using SensorEvent.timestamp. Description: I am working on System Identification of a quadcopter. Data acquisition is done using…
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CheckPermissions Error for LocationManager in Android Studio

I had a good working app for GetGeoLocation for API level 23( Using checkSelfPermission). But, then i had to make it compatible with API level 21. So, checkSelfPermission didn't work as it was introduced in API Level 23. So, i changed the code to…
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How to make Android Apps designed for API 22 compatible with API21

I am new to android development and using Xamarin.Android so please keeps terminology simple and relevant if possible. Current question is, are apps developed for API 22 (android 5.1) compatible with API 21 (android 5.0) by nature - i.e. without…
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Does android.hardware.Camera still works on all API levels?

I am going to be making a camera application, really simple, just add some new interface to the camera app, so nothing fancy, and I was wondering if I could still use the old android.hardware.Camera api since it is simpler and easier to use.
mrOak
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XMLhttprequest from android to get response from ATG server

I am facing one problem with android accessing ATG sessionconfirmationNumber using rest API, I am using http urlconnection to achive the same, Code is working perfectly and I am getting output also, but the result in the Json response is rounded as…
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Vector Drawable vs Png apk splitting

Currently we are trying to split up our Android APK by API level so that less than or equal to 19 get's the PNG's and greater than 21 gets the new vector drawable XML's, since we are trying to reduce the footprint of our app. Currently, we are…
iHowell
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Adding buttons programmatically is not working in API level 23. I need the buttons to be dynamically generated. How do I add them?

The following is the code which adds a button dynamically to the LinearLayout: private void createAndAddButton() { LinearLayout top_row = (LinearLayout)findViewById(R.id.act1toprow); // Check if Linear Layout is already…
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Problems with intention of using Android API 10

I'm about to build a new app. I'm just making an alarm and I'm aiming to help old people mainly (I assume they don't follow technology as geeks and they can use old phones like 5-6 years old) and max user count not shiny new features. So I can…
ErTR
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How to deal with different API levels in code

I started with development with material design. My layouts and styles are separated in those for pre-lollipop devices and those for lollipop and higher. E.g i use
user4640843
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Android API level - gradle compiles - will it run?

I changed the API level in my android project for test purposes from 22 down to 7 in the build.gradle file. Gradle has no problems to build the project and it runs on my (Android 5.1 OS) withouth problems. Does the successfull build indicates the…
sampa
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