如何在Android的ActionBar中为向上按钮添加侦听器? [英] How to add a listener for the up button in ActionBar on Android?

问题描述

我以这种方式在Android活动的操作栏中添加了向上按钮:

I added the up button in the action bar of my android activity in this way:

活动:

getSupportActionBar().setDisplayHomeAsUpEnabled(true);

getSupportActionBar().setDisplayHomeAsUpEnabled(true);

清单:

android:parentActivityName =.MenuActivity">

android:parentActivityName=".MenuActivity">

工作正常，但现在我想在活动之间添加过渡效果. 此过渡效果很好:

It work fine but now i want to add a transition effect between activities. This transition work well:

Intent intent = new Intent(getApplicationContext()，MenuActivity.class); startActivity(intent); OverridePendingTransition(R.anim.slide_in_left，R.anim.slide_out_right);

Intent intent = new Intent(getApplicationContext(), MenuActivity.class); startActivity(intent); overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right);

但是我应该在哪里放置此过渡代码?我的操作栏中的后退按钮没有监听器.

感谢咨询专家

推荐答案

操作栏中的向上按钮被视为ID为android.R.id.home的菜单项，您可以在

The up button in the action bar is treated as a menu item with ID android.R.id.home, as you can read in the docs. There you can find that you can handle clicks on it using this code:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
        // Respond to the action bar's Up/Home button
        return false;
    }
    return super.onOptionsItemSelected(item);
}

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