AppCompatActivity与AppCompatDelegate [英] AppCompatActivity vs AppCompatDelegate

问题描述

最近，我发现什么是AppCompatDelegate，所以自然而然地出现了一个问题-它比使用AppCompatActivity差吗?或者它们之间有区别?它们是什么?

Recently I discovered what is AppCompatDelegate so a natural question arises - is it worse than using AppCompatActivity or do they have their differences and what are they?

推荐答案

如果您的活动类未扩展AppCompatActivity，但您仍要使用其某些功能，则可以使用AppCompatDelegate.

If your activity class is not extending AppCompatActivity but you still want to use some of its features then you can you AppCompatDelegate.

您可以在活动类中使用以下代码行创建Appcompatdelegate:

You can create Appcompatdelegate with following lines of code in your activity class:

private AppCompatDelegate getDelegate() {
    if (mDelegate == null) {
       mDelegate = AppCompatDelegate.create(this, null);
    }
    return mDelegate;
}

以下是示例，如果您想在活动中添加工具栏，但您的班级没有扩展AppCompatActivity.

Here is the example if you want to add Toolbar in your activity but your class is not extending AppCompatActivity.

https://medium.com/google-developer-experts/how-to-add-toolbar-to-an-activity-which-doesn-t-extend-appcompatactivity-a07c026717b3

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