android - 任务 ':app:compileDebugJavaWithJavac' 执行失败

Question

New to Android Studio + Gradle.

I'm trying to run my app from the command line using:

gradlew installDebug

The app gets installed on my device only when I execute that command when Studio just got opened and do that initial syncing/building thing.

Whenever I modified my code, and try to run that command again, the build fails and shows this error:

Execution failed for task ':app:compileDebugJavaWithJavac'
> Could not find tools.jar

How do I solve this problem? Thanks in advance.

Answer 1

Setting the JAVA_HOME variable to C:\\Program Files\\Java\\jdkX.XX worked for me.

It was previously set to the JRE directory for some reason.

Answer 2

Are you on Linux? What does echo $JAVA_HOME outputs?

I had a similar issue when running react-native run-android . After setting $JAVA_HOME (which hadn't existed) to a JDK folder, the problem was solved. In my case, I added the following line to the end of .bashrc file:

export JAVA_HOME="path/to/a/folder/with/JDK/jdk1.8.0_60"

and restarted the terminal.

Answer 3

我从项目根目录中删除了.gradle文件并重建了应用程序，然后一切正常。

Answer 4

For anyone facing this issue after updating to AndroidStudio-2.0

I previously had AndroidStudio-1.3 and jdk-1.7.X_XX. When I updated to AndroidStudio-2.0, things worked fine until I rebooted the computer. After reboot, I encountered this error and none of the above answers worked for me. Here's what I did:

1. Copied the project into a new folder
2. Upgraded my jdk version from 1.7.X_XX to 1.8.X_XX

3. Changed the JDK's path in the project structure to the new path:

   C:\\Program Files\\Java\\jdk1.8.X_XX

4. Gradle sync

And things worked.

Answer 5

ALL above answers are correct. I just wanna mention that if you are using MAC, and the full path of JDK path should be

"/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home"

Do not miss /Contents/Home

Answer 6

The previous answers did not work for me. This is what worked: (Ubuntu, but should work for others as well)

1. Go to your project folder: /.../projectlocation

2. Then to android folder: /.../projectlocation/android

3. Find gradle.properties file and add this line anywhere in the file: org.gradle.java.home=/usr/local/jdk1.8.0_91

Notice that there are no quotes and the right side of the example is my JDK folder.

Answer 7

我遇到了同样的问题。我正在寻找几个小时的堆栈溢出并尝试了他们所说的所有方式，但无法解决问题。然后我发现问题出在我的项目文件夹名称中 。我只是重命名文件夹名称一切都很好。

Answer 8

export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/"

i'am using zshrc i added up line. after that carefully echo $JAVA_HOME in terminal You should see /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home after that build will be done.

Answer 9

Execution Failed for task :app:compileDebugJavaWithJavac in Android Studio

-> after 7 hours i found SOLUTION of this issue in my project level "build.gradle" file.

-> Simple to Remove only 2 things from your "build.gradle" file.

        buildscript { 
          maven { url 'https://jitpack.io' }
        }
        
        allprojects{
            mavenCentral{ url "http://jcenter.bintray.com/" }
            maven { url "https://jitpack.io" }
        }

-> and update the version of gradle just like.

        dependencies {
                classpath 'com.android.tools.build:gradle:4.2.2'
        }
        

-> done.