(linux下是./gradlew，windows是gradlew)
gradlew :app:dependencies 查看所有依賴庫
gradlew -help 查看命令
gradlew tasks 查看task
gradlew -v 查看Gradle版本及其他信息
gradlew clean 刪除項目 xxx/app目錄下的build文件夾
gradlew build 檢查依賴並編譯打包 (生成的包在目錄 xxx/app/build/outputs/apk/下)
gradlew assembleDebug 編譯並打Debug包
gradlew assembleRelease 編譯並打Release的包
gradlew installRelease 打Release模式包並安裝
gradlew uninstallRelease 卸載Release模式包