Android Gradle cannot find symbol class Gson

Question

So i added gson-2.2.4.jar to the libs dir (I\'m using android studio). My project couldn\'t find the gson stuff so I added it as a library dependency to my module in the \"P

Answer 1

In my case, I just added this line:

dependencies {

    compile 'com.google.code.gson:gson:2.7'
}

on my app build.gradle file.

By now 2.7 is last current available version according to: https://mvnrepository.com/artifact/com.google.code.gson/gson

Please check this repository to be sure you are using last available version.

Answer 2

I've faced with same issue.

To solve it be sure that you specify maven central for android plugin

repositories {
    mavenCentral()
}

And it should be added twice if you are defining build script

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.5+'
    } 
}


repositories {
    mavenCentral() 
}


apply plugin: 'android' dependencies {    
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.android.support:support-v4:13.0.0'   
    compile project(':libraries:volley') 
}

Answer 3

Create a folder name libs and add or edit build.gradle (works for any jar lib in folder)

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
}

Answer 4

I faced the same issue. I just added a single line as shown below in my build.gradle dependencies (without adding any jar in project structure) and it worked for me.

dependencies {
    compile 'com.google.code.gson:gson:2.2.+'
    compile 'com.android.support:support-v4:13.0.+'
    compile 'com.android.support:appcompat-v7:18.0.+'
}

Along with above, I found few more things which are required for this to work.

1. Make sure you have android:targetSdkVersion="18" in AndroidManifest.xml file.

   <uses-sdk
       android:minSdkVersion="10"
       android:targetSdkVersion="18" />
   

2. Make sure you have targetSdkVersion 18 in build.gradle file.

   defaultConfig {
       minSdkVersion 10
       targetSdkVersion 18
   }
   

3. Make sure you are connected to internet; so that jars will be downloaded from online central maven repository.