android - 在哪里可以添加 FindViewById() 和 fragment 中的监听器？

Question

我创建了一个 Fragment 并将其命名为 Kabar 我可以看到 Button 和 TextView 出现了正如预期的那样。

这是我的 fragment :

public class Kabar extends Fragment   {
    private Button button;
    private TextView text;

    public Kabar() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v= inflater.inflate(R.layout.fragment_kabar , container, false);
        return v;
    }
}

这是我的 fragment_kabar 布局:

 <FrameLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.examplee.my.Kabar">

     <!-- TODO: Update blank fragment layout -->
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
         <TextView
             android:id="@+id/tt1"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="mohsen kabar" />

         <Button
             android:id="@+id/tt2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginTop="113dp"
             android:text="Button"
             android:layout_below="@+id/mohsenkabar"
             android:layout_alignParentRight="true"
             android:layout_alignParentEnd="true"
             android:layout_marginRight="93dp"
             android:layout_marginEnd="93dp" />
     </RelativeLayout>

我需要使用 Button 和 TextView。

我在哪里可以放置此代码？

text=(TextView) text.findViewById(R.id.tt1);
button=(Button) button.findViewById(R.id.tt2);
button.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        tt1.setText("kkk mmm bbb ddd");
    }
});

Answer 1

有两个选项 onCreateView 和 onViewCreated (首选)方法。

void onViewCreated (View view, Bundle savedInstanceState)

Called immediately after onCreateView(LayoutInflater, ViewGroup, Bundle) has returned, but before any saved state has been restored in to the view. This gives subclasses a chance to initialize themselves once they know their view hierarchy has been completely created. The fragment's view hierarchy is not however attached to its parent at this point.