android – 在Activity中获取Fragment实例

I have added Fragment to Activity like

getSupportFragmentManager().beginTransaction()
                    .add(R.id.container,new MyFragment).commit();

其中container是FrameLayout的id

 <FrameLayout
            android:id="@+id/container"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

现在我怎样才能在Activity like this中获得Fragment的实例

从Fragment B获得结果后,我必须调用Fragment A的方法.

我在Fragment B中创建了一个接口,并在Activity.Now中实现了它.我必须将结果传递给Fragment A.我无法获得Fragment A的实例.

One thing i don’t wanna do is to create a private instance of Fragment A in Activity and call it’s method.

解决方法:

试试这个

getSupportFragmentManager().beginTransaction()
                .add(R.id.container,new MyFragment(),"MyFragment").commit();

获取片段

MyFragment frag = ((MyFragment) getSupportFragmentManager().findFragmentByTag("MyFragment"));

标签：android,interface,android-fragments,android-framelayout,fragmentmanager
来源： https://codeday.me/bug/20190713/1449213.html