How to retrieve path to ADB in build.gradle

问题

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?

回答1:

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()

回答2:

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'
    }
}

回答3:

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

回答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

回答5:

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: