How to retrieve path to ADB in build.gradle

Question

I trying to start application via gradle task.

task runDebug(dependsOn: ['installDebug', 'run']) {
}

task run(type: Exec) {
commandLine 'adb', 'shell', 'am', 'start', '-n', 'com.example.myexample/.ui.SplashScreenActivity'
}

But this code don't work and i get error:
a problem occurred starting process 'command 'adb''

However, when i specify the path to adb explicitly, application is started.

task run(type: Exec) {
    commandLine 'D:\\android\\android-studio\\sdk\\platform-tools\\adb', 'shell', 'am', 'start', '-n', 'com.example.myexample/.ui.SplashScreenActivity'
}

So how can i get a variable which contains the path and transfer it to commandLine?

Answer 1

The problem was solved.
The variable must contain

def adb = "$System.env.ANDROID_HOME/platform-tools/adb"

And complete task looks like

task run(type: Exec) {
    def adb = "$System.env.ANDROID_HOME/platform-tools/adb"
    commandLine "$adb", 'shell', 'am', 'start', '-n', 'com.example.myexample/.ui.SplashScreenActivity'
}

UPD
Another way without using ANDROID_HOME

task run(type: Exec) {
    def rootDir = project.rootDir
    def localProperties = new File(rootDir, "local.properties")
    if (localProperties.exists()) {
        Properties properties = new Properties()
        localProperties.withInputStream { 
            instr -> properties.load(instr)
        }
        def sdkDir = properties.getProperty('sdk.dir')
        def adb = "$sdkDir/platform-tools/adb"
        commandLine "$adb", 'shell', 'am', 'start', '-n', 'com.example.myexample/.ui.SplashScreenActivity'
    }
}

Answer 2

def androidPlugin = project.plugins.findPlugin("android")
def adb = androidPlugin.sdkHandler.sdkInfo?.adb

Answer 3

My default solution for this issue is to add adb to your path variable so you can use the adb command from every path.
You can set it e.g. from the console like this:

set path=%path%;x:\path\to\adb

Alternative you can set it via the UI. See also this explanation on java.com.

Answer 4

In Windows you can just register an application path for adb.exe with the following .reg file:

REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\adb.exe]
@="D:\\android\\android-studio\\sdk\\platform-tools\\adb.exe"
"Path"="D:\\android\\android-studio\\sdk\\platform-tools"

and just keep your original commandline

Answer 5

You should use the logic that the Android Gradle plugin already has for finding the SDK and adb locations to ensure your script is using the same ones.

# Android Gradle >= 1.1.0
File sdk = android.getSdkDirectory()
File adb = android.getAdbExe()

# Android Gradle < 1.1.0
File sdk = android.plugin.getSdkFolder()
File adb = android.plugin.extension.getAdbExe()

Answer 6

we can get if from android extension.

android.adbExe