错误：条目中的空值：streamOutputFolder = null或错误：条目中的空值：streamOutputFolder = null

Question

I am unable to run my app in emulator because of this Error :

Error:null value in entry: streamOutputFolder=null

or

gradle - Error:null value in entry: incrementalFolder=null

Answer 1

When you are unable to run your app on your emulator or phone

go to the .gradle folder delete it then rebuild your projects then click on run button

if that doesnt work delete .gradle folder open the build.gradle file which content something like this

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.0.1'


    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

//change the classpath to

classpath 'com.android.tools.build:gradle:3.0.0'

but if your classpath initially is 2.3.1 change it to 2.3.0

Answer 2

Empty all "build" folders in your project
Copy all your project files and folders
Create a new folder and past it there
Open android Studio and import project
Wait Android Studio to download all dependecies.

And i found another solution here: LINK

• Removing the .gradle directory in the root project directory will fix the problem.

Hope this helps you.