Develop Reference

Android studiogradle project sync failed

hi guys i am a newbie in Android Studio and i have a problem with my gradle project it brings up this message;
Could not get unknown property '' for DefaultExternalModuleDependency{group='com.android.support', name='animated-vector-drawable', version='25.2.0', configuration='default'} of type org.gradle.api.internal.artifacts.dependencies.DefaultExternalModuleDependency.Kindly Assist.
code for app level gradle build
android {
compileSdkVersion 26
buildToolsVersion "26.0.0"
defaultConfig {
applicationId "com.example.sarah_njeri.theroscaapp"
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 'com.android.support:animated-vector-drawable:25.2.0'''
compile 'com.android.support-compact:25.3.1'
compile 'com.google.android.gms:play-services:10.0.1'
compile 'com.google.firebase:firebase-database:10.0.1'
compile 'com.android.support:support-vector-drawable:26.3.1'
}
apply plugin: 'com.google.gms.google-services'

compile 'com.android.support:animated-vector-drawable:25.2.0'''
you have added two extra ' there just delete it
compile 'com.android.support:animated-vector-drawable:25.2.0'

Unable to add Gradle Dependency

I am trying to add this dependency to gradle, but I am receiving the below errors about other dependencies which I have not added in the first Place.
Errors :
Dependency I am trying to add is com.wdullaer:materialdatetimepicker:3.1.3
build.gradle file
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.pf.datetimepicker"
minSdkVersion 21
targetSdkVersion 24
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'])
compile 'com.android.support:appcompat-v7:+'
compile 'com.wdullaer:materialdatetimepicker:3.1.3'
}

which I have not added in the first Place.
Sure you did...
Look at the source of the library you got. https://github.com/wdullaer/MaterialDateTimePicker/blob/master/library/build.gradle
compile 'com.android.support:support-v4:25.2.0'
compile 'com.android.support:support-v13:25.2.0'
compile 'com.android.support:design:25.2.0'
First, you need compileSdkVersion 25 for those to even work, then you need to allow Android Studio to "Install Repository and Sync Project" or do it yourself by updating the SDK Manager.

Change your compile and targetsdk to 25

Change your compileSdkVersion, buildToolsVersion andtargetSdkVersion
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.pf.datetimepicker"
minSdkVersion 21
targetSdkVersion 25
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'])
compile 'com.android.support:appcompat-v7:+'
compile 'com.wdullaer:materialdatetimepicker:3.1.3'
}

You have not installed the newest version of android support libraries. Just open SDK manager and install them. See the image

applying a new library dependancy in android studio project structure

I have a problem with applying a new library dependancy in Project struction.
on the lesson to learn how to use google map,
Project Structure -> Module -> app -> dependancy -> library dependancy
I faced
a NoClassDefFoundError : Could not initialize classcom.android.tools.idea.structure.gradle.MavenDependencyLookupDialog
Any suggestion or feedback will be appreciated
Thank you.
my build.gradle is like this
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "org.googlemap.googlemapdemo"
minSdkVersion 15
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-v7:23.0.1'}

Android Studio telling me it cannot resolve symbols?

Android Studio was telling me it couldn't resolve some symbols in my code. After research, it was apparent that my project was API level 23, which wasnt compatible with some of the code. I decided to change it to API level 21.
Below is the previous code in my build.gradle file
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.scriptdesigninc.test_app"
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'])
compile 'com.android.support:appcompat-v7:23.0.1'
}
I was told that I have to change it to the following,
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
applicationId "com.scriptdesigninc.test_app"
minSdkVersion 14
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-v7:22.2.0'
}
After I changed it, it told me I am missing the API package and that I have to download it, which I did. Then I clicked "retry" and it said it was unable to sync gradle project.
Please help, thank you in advance.

dependencies {
compile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
}
Add the above dependency in your build.gradle file.
This is happening because Android M does not supports the Apache HTTP API

Not able to communicate between two modules in an Android project?

My project have two modules:
App
Facebook-lib
Here are my gradle files:
setting.gradle
include ':app', ':facebook-lib'
Module App gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.app.test"
minSdkVersion 18
targetSdkVersion 22
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-v7:22.1.1'
compile project (':facebook-lib')
}
Module Facebook-lib gradle
apply plugin: 'com.android.library'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
minSdkVersion 18
targetSdkVersion 22
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-v7:22.1.1'
compile 'com.facebook.android:facebook-android-sdk:4.0.0'
}
Whenver I am trying to access Facebook-lib class in App module. It works but I can't do vice versa.
I get com.app.testpackage doesn't exist or cannot find symbol class.
What I am doing wrong here?

You can't achieve it.
Your Module App has a dependency with the Module Facebook library. It means that you can use the classes inside the library in your main module.
Your Facebook library doesn't have a dependency with your module. It means that you can't use the classes in main module.
Also you can't create a circular dependency.