Could not find tools.jar React Native Android In windows 10

Question

guys . i just try to install react native in my laptop. i've followed all setup instruction but i stiil get those error .

* What went wrong: Execution failed for task ':app:compileDebugJavaWithJavac'. > Could not find tools.jar 

i used genymotion with os version 5.1.0, i've setup environment variable for android_home. Any idea what i miss here ?

Answer 1

Setting the missing "JAVA_HOME" system environment variable worked for me.

• Press WIN+Pause on keyboard.
• Click advanced system settings.
• Click "Environment variables".
• Click "New" under "System variables".
• Type "JAVA_HOME" in the Variable name field.
• Type the path to the JDK in the Value field. For me the correct path with short filename was "C:\PROGRA~1\Java\jdk1.8.0_66". Your path will vary depending on the installed version.
• Click OK, and OK in previous window too.
• Restart any command prompts or restart the computer.
• react-native run-android worked fine after that.

Answer 2

Setting up appropriate JDK (not JRE. JRE does not have tools.jar) version (E.g. JDK 1.7x) path as the JAVA_HOME would resolve this issue.

Please check your computer's environment variables and set JAVA_HOME if it has not already been setup.