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Android, Firebase: Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be smaller than version 16

My app/build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "26.0.1"
defaultConfig {
applicationId "com.example.firebase"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:26.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.google.firebase:firebase-auth:11.0.4'
compile 'com.firebaseui:firebase-ui-auth:2.3.0'
compile "com.android.support:design:26.1.0"
compile "com.android.support:customtabs:26.1.0"
compile "com.android.support:cardview-v7:26.1.0"
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'
But when I try to build my Android project I get error:
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be smaller than version 16 declared in library [com.firebaseui:firebase-ui-auth:2.3.0]
I can't change minSdkVersion because this is the client's requirement - run Android application on min. ver = 15

I can't change minSdkVersion because this is the client's requirement - run Adnroid application on min. ver = 15
You can't do it since you are using some dependencies with minSdk = 16 (in your case the firebase-ui has a minSdk=16).
You can choose an older version of the dependencies but you will have always problems in the future since you will not able to update them.
As you can check in the official dashboard, today with minSdk=16 you will cover over the 99% of the devices.
In any case, if it is a strong requirement of the customer you can create multiple APKs for Different API Levels.
It means that you can create different flavors in your build.gradle with a different level of api and different dependencies. In this way you will be able to support device with api 15 and also the new versions of the libraries used.
productFlavors {
// priority than the second, and so on.
minApi15 {
minSdkVersion '15'
...
}
minApi16 {
minSdkVersion '16'
}
}
dependencies {
minApi15Compile xxxxx
minApi16Compile xxxxx
}

To solve this problem, you need to downgrade the version of your com.firebaseui:firebase-ui-auth:2.3.0.
2.3.0 is the latest version. According to FirebaseUI-Android you need to use an earlier version which allow you to use minSdkVersion 15.
Hope it helps.

I got this error while loading Android studio

Error:Execution failed for task ':app:processDebugManifest'.
Manifest merger failed : uses-sdk:minSdkVersion 9 cannot be smaller than version 14 declared in library [com.android.support:design:26.0.0-alpha1] /home/dinesh/.android/build-cache/5b4541f0362f0c186bfecf0c7160b9688c35a715/output/AndroidManifest.xml
Suggestion: use tools:overrideLibrary="android.support.design" to force usage

It is self explanatory. The library which you are using in your app has min sdk version set to 14.
But in your app you have set it to 9.
Now you need to increase it to minimum 14.

in app/build.gradle, minSdkVersion should not be smaller than 14

Set your project to use SDK version 25.0.0. Ensure it is downloaded first in Android SDK settings found under Tools > Android > SDK Manager. Search for SDK Settings and look under SDK Tools. Ensure Show Package Details is checked.
Then change your app/build.gradle to have 25.0.0 used in place of what put there by default if you used the wizard to create your app. e.g.
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.0"
defaultConfig {
applicationId "com.example.adam.myapplication5"
minSdkVersion 9
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.0.0'
compile 'com.android.support:design:25.0.0'
compile 'com.android.support:support-vector-drawable:25.0.0'
testCompile 'junit:junit:4.12'
}
You can change the Sdk version, the buildToolsVersion and targetSdkVersion via the File > Project Structure > Properties and Flavors tabs. But I found the need to set the compile directives manually via editing the build.gradle file directly.

Failed to resolve: com.android.support:appcompat-v7:21.0.1

I recently changed my mindSdkVersion to 17 and targetSdkVersion to 21, and got lots of errors. I fixed some of them, but I can't fix this one:
Error:(28, 13) Failed to resolve: com.android.support:appcompat-v7:21.0.1
I'm using Android Studio on Mac and I have Android Support repositories.
My build.gradle file:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "24.0.3"
defaultConfig {
applicationId "com.swit.sedamaker"
minSdkVersion 17
targetSdkVersion 21
versionCode 2
versionName "1.01"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
compile 'com.android.support:appcompat-v7:21.0.1'
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
testCompile 'junit:junit:4.12'
}

The error occur because 21.0.1 for support libraries doesn't exist.
dependencies{
//it requires compileSdkVersion 21
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.android.support:appcompat-v7:21.0.2'
compile 'com.android.support:appcompat-v7:21.0.0'
}

You're better to match the API version for compileSdkVersion, buildToolsVersion, targetSdkVersion. Try to use the latest SDK
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.3"
defaultConfig {
...
minSdkVersion 17
targetSdkVersion 24
...
}
...
}
dependencies {
compile 'com.android.support:appcompat-v7:24.2.0'
...
}
Of course you can set targetSdkVersion to 21 if you want. targetSdkVersion is used to inform the system that you have test the app against the target version like the documentation said.
android:targetSdkVersion
An integer designating the API Level that the
application targets. If not set, the default value equals that given
to minSdkVersion. This attribute informs the system that you have
tested against the target version and the system should not enable any
compatibility behaviors to maintain your app's forward-compatibility
with the target version. The application is still able to run on older
versions (down to minSdkVersion).
Read more at What is the difference between compileSdkVersion and targetSdkVersion? forcompileSdkVersion and targetSdkVersion.

Try Replace with:
implementation 'com.android.support:appcompat-v7:23.3.0'

How to support GCM service for minimum version 8 in Android

How to support Android minimum SDK version 8 for Google play GCM service [com.google.android.gms:play-services-base:8.4.0]. In my application I have set minimum SDK version 8 and targeting version 23 and need Google GCM service to my app, so that I have added corresponding dependencies to the app.
This is gradle file:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "com.mg"
minSdkVersion 8
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'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.google.android.gms:play-services-gcm:8.4.0'
compile files('libs/achartengine-1.0.0.jar')
compile files('libs/android-async-http-1.4.4.jar')
compile files('libs/httpmime-4.1.jar')
compile project(':sliderlibrary')
}
Got the following error:
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 8 cannot be smaller than version 9 declared in library [com.google.android.gms:play-services-gcm:8.4.0] /home/node/mg_android_studio/MeterGenius/app/build/intermediates/exploded-aar/com.google.android.gms/play-services-gcm/8.4.0/AndroidManifest.xml
Suggestion: use tools:overrideLibrary="com.google.android.gms.gcm" to force usage
How to get support for minimum version 8?. Please help me.

Follow the suggestion in the error message and add the following to your Manifest:
<uses-sdk tools:overrideLibrary="com.google.android.gms.gcm"/>
Be prepared however that GCM might not work as expected on SDK 8.

Gradle build error."minsdkversion 14 cannot be different than version l declared in library"?

Hi everyone I am new to android developing.I download the latest version of android studio 1.3.2 yesterday.But when I start a new project for testing, gradle give me an error.
My gradle is
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.example.niyamat.testing3"
minSdkVersion 15
targetSdkVersion 21
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-v7:21.+'
}
The error is
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be different than version L declared in library [com.android.support:appcompat-v7:21.0.0-rc1] C:\Users\Niyamat\Documents\Testing3\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0-rc1\AndroidManifest.xml
I know there are some question about the same error but I didn't find any good solution.
So please someone help me?

Whats your Logcat Throws
Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be different than version L declared in library [com.android.support:appcompat-v7:21.0.0-rc1]
What should you Do
Remove minSdkVersion version from Manifest .You already declare it in your build.gradle .
Use this compileSdkVersion 21
buildToolsVersion '21.1.2' instead yours.
Compile compile 'com.android.support:appcompat-v7:21.0.1'
First of all remove this line from your Manifest .
<uses-sdk android:minSdkVersion="15" android:targetSdkVersion="22" />
Finally
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.example.niyamat.testing3"
minSdkVersion 15
targetSdkVersion 21
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-v7:21.0.1'
}

It is your issue.
uses-sdk:minSdkVersion 15 cannot be different than version L declared in library [com.android.support:appcompat-v7:21.0.0-rc1]
It is quite strange that you have in your sdk folder the preview version of appcompat 21.
This version was published with the lollipop preview (api-L) and had the minSdk = L. It is the reason of your issue (because you have minSdkVersion 15)
You should not have this folder in your sdk. Check with the SDK Manager if it is updated.
Then you can modify your build.gradle removing the +.
Support libraries v21
compile 'com.android.support:appcompat-v7:21.0.0'
compile 'com.android.support:appcompat-v7:21.0.2'
compile 'com.android.support:appcompat-v7:21.0.3'
Support libraries v22 (require compileSdkVersion 22)
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.android.support:appcompat-v7:22.1.0'
compile 'com.android.support:appcompat-v7:22.1.1'
compile 'com.android.support:appcompat-v7:22.2.0'
compile 'com.android.support:appcompat-v7:22.2.1'
Support libraries v23 (require compileSdkVersion 23)
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.android.support:appcompat-v7:23.0.1'

Seems you have a previous version of the app compat into your lib folder specific for android L.
Also you should set the version for compileSdkVersion, buildToolVersion, targetSdkVersion and the appcompat-v7 to be the same.
In your case, the buildToolVersion should be "21.1.2".

Basically, this is the reason why android studio complains / suggests NOT using .+ in your compiles.
compile 'com.android.support:appcompat-v7:21.+'
It forces compile with absolute last version of appcompat 21 which is com.android.support:appcompat-v7:21.0.0-rc1 (as you can see from error you got). That version does not allow minSdkVersion 15 - it's made for Lollipop. Change your compile appcompat to version number that does allow minSdkVersion 15 to solve the issue.