Want to do an Android picture app, get the picture on the server the best way to do that?

APP request database server → database return JSON data →app parse JSON data → show picture
Is this the principle? Or does the APP directly query the image URL in the database? I heard that JSON was fast ... What the hell is the relationship ... The mind is a bit chaotic, also invites the big God to instruct twos. (What's the way to get a picture URL if you do this picture app?) ）

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APP request database server → database return JSON data →app parse JSON data → show picture
Is this the principle? Or does the APP directly query the image URL in the database? I heard that JSON was fast ... What the hell is the relationship ... The mind is a bit chaotic, also invites the big God to instruct twos. (What's the way to get a picture URL if you do this picture app?) ）

1.JSON is a data format, no quick and unpleasant concept
2. Recommended Steps

安卓客户端需要请求服务端服务端可以读取数据库,然后把数据包装成 json 格式响应给安卓客户端客户端解析 json, 显示里面的图片 url

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