A variety of mobile devices and applications have spread the usability of blockchain solutions to over 5.27 billion unique mobile phone users. The rising of Bitcoin price up to USD 50,000 in March 2021 has made many blockchain mobile wallets and smart contracts DApps popular for current and future investment of cryptocurrency and digital-asset managements. To understand the trend, this chapter will present the design and implementation of mobile blockchain DApps using Android Studio together with Ethereum smart contract as the digital-asset management tool. Java Android and Ethereum Web3-Java APIs will be demonstrated as a practical deployment of the mobile DApps. The logic and decision-making of the mobile DApps will be demonstrated and coded as a smart contract. The source codes of the mobile DApps and smart-contract were published in Github as open-source codes for those who are interested to build and run the project.
翻译：2021年3月,Bitcoin价格上升至50,000美元,使得许多块链移动钱包和智能合同Dapps成为当前和今后对加密货币和数字资产管理投资的流行对象。为了了解这一趋势,本章将介绍使用Android Studio和Etheum智能合同作为数字资产管理工具的流动链Dapps的设计和实施。Java Android和Etheyum Web3-Java APis将被展示为移动Dapps的实际部署。移动Dapps的逻辑和决策将作为智能合同加以展示和编码。移动Dapps和智能合同的源代码在Githubb出版,作为有兴趣建造和管理该项目的人的开源代码。
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