Using viewholder to optimize the writing method of custom adapter in Android (required)

I've written a lot about adapter recently, and I'm getting familiar with it slowly.

Using viewholder is mainly to optimize performance and reduce unnecessary repetitive operations. (WxD taught me.)

Don't analyze the details, just the previous code:

Markeritem is a custom class, which contains fields such as name, description and createtime, and has corresponding get and set methods.

Viewholder is an internal class that contains controls in a single project layout.

The layout of a single item, i.e. r.layout.item_ marker_ The item is as follows:

The official API demos also has this example:

List14 in package com.example.android.apis.view:

Layout:

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