ionic cordova build android
すると、
FAILURE: Build failed with an exception. * Where: Script '/Users/shinriyo/development/ionic_apps/passer/platforms/android/CordovaLib/cordova.gradle' line: 68 * What went wrong: A problem occurred evaluating project ':CordovaLib'. > No installed build tools found. Install the Android build tools version 19.1.0 or higher. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. * Get more help at https://help.gradle.org BUILD FAILED in 1s (node:78109) UnhandledPromiseRejectionWarning: Error: /Users/shinriyo/development/ionic_apps/passer/platforms/android/gradlew: Command failed with exit code 1 Error output: FAILURE: Build failed with an exception. * Where: Script '/Users/shinriyo/development/ionic_apps/passer/platforms/android/CordovaLib/cordova.gradle' line: 68 * What went wrong: A problem occurred evaluating project ':CordovaLib'. > No installed build tools found. Install the Android build tools version 19.1.0 or higher.
sdkmanager tools --verbose
やってみる。