[英]How to implement Back button functionality
I have 3 different activity namely, category,sub_category and list of items. 我有3个不同的活动,即category,sub_category和item列表。 In sub_category i created back button using intent Activity.
在sub_category中,我使用intent Activity创建了后退按钮。 Back button in list_of items should be focus to sub_category.
list_of项目中的后退按钮应该聚焦到sub_category。 i dont know how to do this.. pls guide me..
我不知道该怎么做..请指导我..
from category activity call 来自类别活动电话
Intent it=new Intent(category.this,sub_category.class)
startActivityForResult(it);
similarly 同样
Intent it=new Intent(sub_category.this,list_item.class)
startActivityForResult(it);
and in onClickListener of back button simply finish your activity like 并且在后退按钮的onClickListener中完成你的活动就好了
list_item.this.finish();
for going back to previous screen u can call finish() in your current activity. 要返回上一个屏幕,您可以在当前活动中调用finish()。 It will remove the current activity from activity Stack and take you to the previous one.
它将从活动堆栈中删除当前活动并转到上一个活动。
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