我试图在一个片段中创建一个ImageView,它将引用我在XML中为片段创建的ImageView元素。但是,findViewById方法仅在扩展Activity类时有效。我是否也可以在Fragment中使用它?

public class TestClass extends Fragment {
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ImageView imageView = (ImageView)findViewById(R.id.my_image);
        return inflater.inflate(R.layout.testclassfragment, container, false);
    }
}

findViewById方法有一个错误,说明该方法未定义。


当前回答

getView()将给出根视图

View v = getView().findViewByID(R.id.x); 

其他回答

你必须放大视图

public class TestClass extends Fragment {

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.testclassfragment, container, false);
    ImageView imageView = (ImageView)v.findViewById(R.id.my_image);
    return v
}}
EditText name = (EditText) getView().findViewById(R.id.editText1);
EditText add = (EditText) getView().findViewById(R.id.editText2);  

我喜欢一切都有条理。你可以这样做。

第一个初始化视图

private ImageView imageView;

然后覆盖OnViewCreated

@Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        findViews(view);
    }

然后添加一个void方法来查找视图

private void findViews(View v) {
    imageView = v.findViewById(R.id.img);
}

根据API级别11的文档

参考,在Back Stack http://developer.android.com/reference/android/app/Fragment.html

短代码

/**
 * The Fragment's UI is just a simple text view showing its
 * instance number.
 */
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.hello_world, container, false);
    View tv = v.findViewById(R.id.text);
    ((TextView)tv).setText("Fragment #" + mNum);
    tv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.gallery_thumb));
    return v;
}

试试这个:

View v = inflater.inflate(R.layout.testclassfragment, container, false);
ImageView img = (ImageView) v.findViewById(R.id.my_image);

return v;