Android Rocket Launcher 
Gradle plugin that adds tasks to your android modules for installing and launching all variants.
How to use
Paste this code into your module's build.gradle
apply plugin: 'android-rocket-launcher' buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.cesarferreira:android-rocket-launcher:0.2.3'
}
}
Now, when you run ./gradlew tasks, you'll see something like this:
openDemoDebug - Installs and opens DebugDemo build openFreeDebug - Installs and opens DebugFree build openPaidDebug - Installs and opens DebugPaid build Alternative
Copy-pasting this gradle task on every project
// Running the APK on your Android Device android.applicationVariants.all {
variant ->
if (variant.install) {
tasks.create(name: "run${
variant.name.capitalize()
}
", type: Exec,
dependsOn: variant.install) {
group = 'Run'
description "Installs and Runs the APK for ${
variant.description
}
."
def getMainActivity = {
file ->
new XmlSlurper().parse(file).application.activity.find {
it.'intent-filter'.find {
filter ->
return filter.action.find {
it.'@android:name'.text() == 'android.intent.action.MAIN'
}
\
&& filter.category.find {
it.'@android:name'.text() == 'android.intent.category.LAUNCHER'
}
}
}
.'@android:name'
}
doFirst {
def activityClass =
getMainActivity(variant.outputs.processManifest.manifestOutputFile)
commandLine android.adbExe, 'shell', 'am', 'start', '-n',
"${
variant.applicationId
}
/${
activityClass
}
"
}
}
}
}
It's a no brainer