Develop Reference

Error:Failed to resolve: Crosswalk

I'm trying to make a SDK using Crosswalk. So first I started to make a sample app using
compile 'org.xwalk:xwalk_core_library:23.53.589.4'. And it works. Then I tried to make a SDK using this. But it didn't work as I expected.
gradle file
apply plugin: 'com.android.library'
repositories {
maven {
url 'https://download.01.org/crosswalk/releases/crosswalk/android/maven2'
}
}
android {
compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
minSdkVersion 16
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-v7:26.0.0-alpha1'
compile 'org.xwalk:xwalk_core_library:23.53.589.4'
testCompile 'junit:junit:4.12'
}
Here is the screenshot of error message

execution failed for tasks: multiple dex files define for appcompat version

android {
compileSdkVersion 27
buildToolsVersion "27.0.3"
defaultConfig {
applicationId "com.example.ceinfo.firebaseproject"
minSdkVersion 15
targetSdkVersion 19
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-v7:27.0.0'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'
When I want to execute espresso test run, it shows me an error of multiple dex files define, I have set my appcompat version to 27.0.0, please suggest me solution to this error.

Using of prebuilt .so file without other files

Actually i have a pre-built .so file. but i have no header files and and c files. can i use it in android studio for execution and what will be the changes have to be made in the build gradle of app? please help me..
my build gradle is as follows:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion "26.0.0"
defaultConfig {
applicationId "com.acsiatech.microfuzzy.samplejniinterface"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags ""
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
}
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'
testCompile 'junit:junit:4.12'
}

Imported a library to an old project and got error in Android Studio

I imported a ui-library to an old project in android studio. Everything goes fine until I add compile project(':Android Library' to build.gradle of my app module. Here is the setting in build.gradle of app and library respectively.
App
android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
defaultConfig {
applicationId "com.chimaera.AppName"
minSdkVersion 18
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'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:support-core-ui:25.3.1'
compile 'com.android.support:design:25.3.1'
compile project(':MaterialDesign')
testCompile 'junit:junit:4.12'
Library module
android {
compileSdkVersion 22
buildToolsVersion '25.0.0'
defaultConfig {
minSdkVersion 16
targetSdkVersion 22
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dependencies {
compile 'com.nineoldandroids:library:2.4.+'
compile 'com.android.support:support-v4:22.+'
compile fileTree(dir: 'libs', include: '*.jar')
(I forgot to paste the error.) Here is the error tips.
enter image description here
enter image description here
It jumped to a value.xml seems unrelated to this error.
I set minifyEnabled to false for release but keep debug setting blank. Do I need to set debug as well. Is there anything wrong with version settings to cause imported error?

Failed to resolve javax

I created a new Application and I am getting these errors
This is my app level
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
defaultConfig {
applicationId "com.vfirst.genie"
minSdkVersion 15
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'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:24.2.1'
testCompile 'junit:junit:4.12'
}

Download the latest version of Android Support Repository, Android Support Library and Google Repository from your SDK Manager.
I think it should solve the issue.