安装java 8后出现问题

Question

Android Studio had a popup telling updates was available after i run the SDK manager and started the Android Studio again I got another popoup that toke me to Androids website where it told me that I should upgrade to Java JDK 8 and JRE 8 after I did i got over 235 errors when try to run the debug. I uninstalled version 8 and reinstalled 7u80 JDK and JRE now I'm down to 34 errors. When I type java -version I get 1.8.073 here are all 35 errors.

    Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
Error:  at java.lang.ClassLoader.defineClass1(Native Method)
Error:  at java.lang.ClassLoader.defineClass1(Native Method)
Error:  at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
Error:  at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
Error:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
Error:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
Error:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
Error:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
Error:  at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
Error:  at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
Error:  at java.security.AccessController.doPrivileged(Native Method)
Error:  at java.security.AccessController.doPrivileged(Native Method)
Error:  at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
Error:  at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
Error:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
Error:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
Error:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Error:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Error:Exception in thread "main" 
Error:Exception in thread "main" 
Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_80\bin\java.exe'' finished with non-zero exit value 1

Here is the Gradel.build

android {
    compileSdkVersion 23
    buildToolsVersion '24.0.0 rc1'
    defaultConfig {
        applicationId "com.kim.printer"
        minSdkVersion 21
        targetSdkVersion 23
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
    productFlavors {
    }
}

dependencies {
    compile 'com.google.android.gms:play-services-gcm:8.4.0'
    compile 'com.google.code.gson:gson:2.4'
    compile "com.android.support:support-v4:23.1.0"
    compile "com.android.support:support-v13:23.1.0"
    compile "com.android.support:cardview-v7:23.1.0"
    compile 'com.android.support:appcompat-v7:23.0.0'
    compile files('libs/StarIOPort3.1.jar')
    compile files('libs/StarIO_Extension.jar')
}

Thanks for any help I have been working on this for 6 hours and I can get it to compile.

Answer 1

问题出在buildToolsVersion '24 .0.0 rc1'之后，将其更改为'23 .0.2'我不再出错。

Answer 2

This problem occurs when you update to Android Studio to 2.0.

To solve this problem:

• Open build.gradle file
• Change buildToolsVersion "24.0.0 rc1" to buildToolsVersion "23.0.2"

Happy coding.

Answer 3

This problem is related with your SDK, not with your JDK. You can check your version information from

Help > About > Show Details

You will get something like

Xamarin.Android Version: 6.0.2.1 (Starter Edition) Android SDK: X:\\Android\\android-sdk

Supported Android versions:

4.0.3 (API level 15)

4.4 (API level 19)

6.0 (API level 23)

SDK Tools Version: 24.4.1

SDK Platform Tools Version: 23.0.1

SDK Build Tools Version: 24 rc2

Java SDK: X:\\Program Files (x86)\\Java\\jdk1.7.0_71

java version "1.7.0_71"

Java(TM) SE Runtime Environment (build 1.7.0_71-b14)

Java HotSpot(TM) Client VM (build 24.71-b01, mixed mode, sharing)

If you are using preview tools for building ,then you will get similar errors all over.

What to do now?

Tools -> SDK manager

1. Select all items in preview channels including Android SDK build tools with rev 24rc2 or 24rc4 (latest)

2. Click on Delete 'n' packages

How to turn off preview channel

1. In SDK manager, select

   Tools > options

2. Uncheck Enable preview tools

And what

Back to your code Clean all and rebuild

Answer 4

Using Android SDK Manager, I removed my last update of Android SDK Build-Tools v.25 remaining with the previous one: v.23.0.3....

...now it's working as it should do!!!