如何从一个片段传递到另一个片段 [英] How to pass from one fragment to another

问题描述

在我的应用程序中，我有一些带有碎片的导航抽屉。当我在抽屉中选择代码时：

  FragmentTransaction ft = fm.beginTransaction（）; 
 ft.replace（R.id.container，f，tag）; 
 ft.commit（）; 
  

在MainActivity中。

我想在屏幕的底部放置一个TabLayout，我有这样的麻烦：

1. 有可能从一个片段替换到另一个片段？我可以在哪里放置 fragmentTransaction ？


2. 如果我想调用第三个片段（例如， ）我可以为该标签使用相同的功能吗？

感谢您的回答

  //导航时项目由用户选择
 @Override 
 public void onDrawerItemSelected（View view，int position）{
 displayView（position）; 
} 
 
 public void displayView（int position）{
 String title = getString（R.string.app_name）; 
 switch（position）{
 case 0：
 fragment = new UserProjectListFragment（）; 
休息; 
情况1：
 fragment = new ContactUsFragment（）; 
休息; 
案例2：
 fragment = new HelpFragment（）; 
休息; 
案例3：
 //等等
 
 break; 
 
默认值：
 break; 
 
 if（fragment！= null）{
 FragmentManager fragmentManager = getSupportFragmentManager（）; 
 FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction（）; 
 fragmentTransaction.replace（R.id.container_body，fragment）.addToBackStack（fragBack）; 
 fragmentTransaction.commit（）; 
 //设置工具栏标题
 getSupportActionBar（）。setTitle（title）; 
 
 
 $ / code $ / pre 
 
 / p对于你的问题是否可以取代一个片段到另一个？我可以在哪里放置fragmentTransaction？ 
 yes 
是这样的
 片段videoFragment = new VideoPlayerFragment（）; 
 FragmentTransaction transaction = getChildFragmentManager（）。beginTransaction（）; 
 transaction.add（R.id.video_fragment，videoFragment）.commit（）; 
  
 
In my app I have navigation drawer with some fragments. When I choose in the drawer I do this code:
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.container, f, tag);
ft.commit();
in the MainActivity.

Now in one fragment I want to put a TabLayout in the bottom of the screen and I have this troubles:

is it possible to replace from one fragment to another? Where could I put fragmentTransaction?
if I want to call a third fragment (for example a Send button in one of this tab fragments) I could use the same functions for the tab?
Thank you for the answers
解决方案
You can do like this...
//when navigation item is selected by user
    @Override
    public void onDrawerItemSelected(View view, int position) {
        displayView(position);
    }

    public void displayView(int position) {
        String title = getString(R.string.app_name);
        switch (position) {
            case 0:
                fragment = new UserProjectListFragment();                    
                break;
            case 1:
                fragment = new ContactUsFragment();
                break;
            case 2:
                fragment = new HelpFragment();
                break;
            case 3:
                //and so on

                break;

            default:
                break;
        }
        if (fragment != null) {
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.container_body, fragment).addToBackStack("fragBack");
            fragmentTransaction.commit();
            // set the toolbar title
            getSupportActionBar().setTitle(title);
        }
    }
/and for your question is it possible to replace from one fragment to another? Where could I put fragmentTransaction?
yes
do like this
Fragment videoFragment = new VideoPlayerFragment();
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.add(R.id.video_fragment, videoFragment).commit();


                        
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