how to get started with android app development code example

Example 1: swift get app version and build

import Foundation

extension Bundle {

    var shortVersion: String {
        if let result = infoDictionary?["CFBundleShortVersionString"] as? String {
            return result
        } else {
            assert(false)
            return ""
        }
    }

    var buildVersion: String {
        if let result = infoDictionary?["CFBundleVersion"] as? String {
            return result
        } else {
            assert(false)
            return ""
        }
    }

    var fullVersion: String {
        return "\(shortVersion)(\(buildVersion))"
    }
}

// Usage:

someLabel.text = Bundle.main.versionNumber

Example 2: how to get app package and app activity in android

adb shell dumpsys window windows | grep -E 'mCurrentFocus'