Develop Reference

Android Studio is changing my API level from 23 to 26

Thanks for stopping by. I have been working on an app at API 23. Now Android Studio is "upgrading" it to API 26. This is not what I want. I want to keep it at API 23. Everytime I make a new app its 26. Downgrading doesn't work; I get a bunch of errors.
Thanks

You can change it as you like.
1.Click on your project folder > app > build.gradle
An example of build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "25.0.3"
defaultConfig {
applicationId "com.stackoverflow.answer"
minSdkVersion 21
targetSdkVersion 26
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dependencies {
androidTestCompile 'junit:junit:4.12'
compile fileTree(dir: 'libs', include: ['*.jar'])
}
2.Open your Android Studio, and go to Menu.
File >Project Structure. In project Structure window, select app module in the list given on left side.
Select the Flavors tab and under this you will have an option for setting “Min Sdk Version” and for setting “Target Sdk Version”.
Select both the versions and Click OK.

Keep in mind that if you're uploading it to the play store, it's going to have to target 26, soon to be 27. That's probably why AS is trying to update your version.

What is Android N and why does it think I'm building with it? (Android Studio 2.1.2, Windows 7)

I started a new generic Android project and I'm getting an error in the Design View saying "Android N requires the IDE to be running with Java 1.8 or later".
But earlier Gradle complained: Error:(3, 22) compileSdkVersion android-23 requires compiling with JDK 7 so I installed JDK 7 - 1.7.0_79 and that fixed the Gradle problems. I don't really want to go to JDK 8.
So what is Android N ? My understanding is that it's the "next" or "latest" version of Android, but I don't need that for my work. I just need to support CalendarView and NestedScrollView. Where am I telling it that I need "Android N", and how do I change that?
My Build.Gradle says:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
applicationId "com.example.ags.mycalendarviewapp"
minSdkVersion 15
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:design:23.4.0'
compile 'com.android.support:support-v4:23.4.0'
}
...

So what is Android N ?
It is the next version of Android, API Level 24. The tasty treat is Nougat.
(no, really, that's the name)
Where am I telling it that I need "Android N", and how do I change that?
If you are getting that in the design view, that's the version of Android that is being used for the preview. It defaults to the latest version whose SDK bits you have installed.
To change it, switch it in the bugdroid drop-down on the right side of the design view toolbar:

Android studio compiledsdkversion 23 is not working

I have recently updated android studio which brought me many problems.
whenever I create a new android project the gradle scripts(Module:app) is displaying the below code
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.example.listproject"
minSdkVersion 17
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), `'proguard-rules.pro'`
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.+'
}
here the above compiledsdkversion 23 provides me
Error:Failed to find: com.android.support:appcompat-v7:23.+ Open
File:open.dependency.in.project.structure">Open in Project Structure
dialog
Because before upgrading I had compiledsdkversion as 21 and it does not provide any problem in gradle sync task.
But when I manually modified the compiledsdkversion to 21 it worked correctly.But every time when I create a new project it has been set to 23.Is there any way to make 21 as default or any corrections for compiledsdkversion 23 itself.
I have another doubt before upgradation my restful services projects worked correctly after this upgradation I am facing many problems.
Even HelloWorld application is not running.But if I manually change the compiledsdkversion to 21 everything is fine.Please provide me a solution for making the compiledsdkversion to 21 by default.

> compile 'com.android.support:appcompat-v7:23.+'
The "+" in "v7:23.+" means to take the newest "v7:23" version. If you have no internetconnection this fails.
either reestablish an internetconnection while building or replace the package with a fixed versionnumber that your system has locally cached when there was an internet conntection (i.e. com.android.support:appcompat-v7:23.0.1)

You are using the appcompat (and other support libraries) v23, please compile your project with API 23.
Change in your build.gradle the compileSdkVersion to 23

Android Studio: Can't install app on the Android device

SOLUTION
In build.gradle file, I set both minSdkVersion and targetSdkVersion to 19 (my Android device's API level).
Also, compileSdkVersion's value must be less than your device's level API.
Issue was:
I cannot install my app I developed in Android Studio, in my Android device (LG G3).
When I try to install my app, this window comes.
When I click OK, the log outputs this.
This was my build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "*AppID*"
minSdkVersion 15
targetSdkVersion 'L'
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
}
What I've tried to do:
1. Modify build.gradle to (Changed compileSdkVersion's value to 15):
apply plugin: 'com.android.application'
android {
compileSdkVersion 15
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "*AppID*"
minSdkVersion 15
targetSdkVersion 'L'
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
}
2. Clean the project: i.imgur.com/lbdeXGe.png.

Take a look at Failure [INSTALL_FAILED_OLDER_SDK] Android-L
Recently there was a post here regarding the L SDK's incompatibility with prior versions of Android. I've been digging in
AOSP repositories for quite a few hours now, and determined that the
tools behave this way because they are designed to treat preview
platforms differently. If you compile against a preview SDK
(android-L), the build tools will lock minSdkVersion and
targetSdkVersion to that same API level. This results in the produced
application being unable to be installed on devices running older
releases of Android, even if your application isn't doing anything
specific to L. To make matters worse, the new support libs (CardView,
RecyclerView, Palette, etc.) are also locked into the L API level,
even though--according to their repository names--they should work on
API level 7 just fine (and they do!).

The error means your device has an Android version that is less than your specified minSdkVersion. Set the minSdkVersion to the device's version. If that's not possible, there's really nothing you can do other than using a newer device.
Edit:
Now seeing userM1433372's answer ... That should be the actual issue. Thought you already tried a different SDK version, but you only changed compileSdkVersion to 15 without changing targetSdkVersion! I would suggest setting both targetSdkVersion and compileSdkVersion to 19 (which is the latest non-preview-version).

Failure [INSTALL_FAILED_OLDER_SDK] in Android Studio

So I know that many other people had this problem, but mine is a little different. I've tried running my app on an LG G2 with Android 4.4.4, and a Note 3 with Android 4.4.2, but neither worked. I have installed the API 18, 19, and 20 SDKs.
Failure [INSTALL_FAILED_OLDER_SDK]
build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-L'
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.ween.control"
minSdkVersion 8
targetSdkVersion 'L'
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:19.+'
}

You can't test an Android-L app on a device with lower API.
Take a look here.

You need to make sure your dependencies are configured targeting the same sdk (also make sure the sdk is supported for the dependency).
As of version .11, the gradle plugin now uses the new manifest merger tool by default which you can use to avoid conflicting configurations when merging manifests from your dependencies while building by specifying <uses-sdk tools:node="replace" /> in your AndroidManifest.xml file.
http://tools.android.com/tech-docs/new-build-system/user-guide/manifest-merger
credit goes to Eddie Ringle

I was having a similar issue but my device sdk was 19 and it was looking for it to be 20. I changed the sdk from the file > Project Structure > SDK to 19 also I noticed when I was running it had the wear value selected in the top toolbar so I switched that to mobile and Voila.