处理高达导航的操作栏像后退导航。怎么样？ [英] Handle Up navigation from Action Bar like Back navigation. How?

问题描述

我怎么能处理最多的导航像后退导航？

How can I handle a Up navigation like a Back navigation?

是否有向上的导航像后退导航（ onBack pressed（））？

Is there a method for the Up navigation like for the Back navigation (onBackPressed())?

或者，我可以PROGRAMM的完成（）方法，当我preSS向上导航？

Or can I programm the finish() method, when I press the Up navigation?

推荐答案

假设由向上导航你的意思上的应用程序图标自来水，你需要重写 onOptionsItemSelected（）在你的活动，并处理它，像这样：

Assuming by 'up navigation' you mean a tap on the app icon, you need to override onOptionsItemSelected() in your activity and handle it like so:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // 'home' is the id for the icon click in the action bar (i.e. up/back).
    if (item.getItemId() == android.R.id.home) {
        // do your thing and return true
        return true;
    }

    return super.onOptionsItemSelected(item);
}

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