Android:在 ViewPagerAdapter 中如何获取 getBaseContext() [英] Android: In ViewPagerAdapter how to get getBaseContext()

问题描述

public class ViewPagerAdapter extends PagerAdapter
Toast.makeText(getBaseContext(), paramString, Toast.LENGTH_SHORT).show();

我想在 toast 消息中使用来自getBaseContext() 值的值.

I want to use the value fromgetBaseContext() value in the toast message.

推荐答案

您可能正在从活动或片段创建适配器对象.如果您要从活动创建 Adapter 对象，请执行以下操作:

You are probably creating the adapter object from an activity or a fragment. If you are creating the Adapter object from an activity then do the following:

Adapter adapter = new Adapter(getBaseContext());

如果来自片段:

Adapter adapter = new Adapter(getActivity().getBaseContext());

.

public class Adapter extends PagerAdapter {
    Context mContext;

    public Adapter(Context context) {
        mContext = context;
    }

}

然后在 Adapter 类中，您可以使用 mContext 来 Toast 或其他任何东西.:)

Then in the Adapter class you can use the mContext to Toast or whatever. :)

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