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
//here you can do it by
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
// Inflate the layout for this fragment
final View view = inflater.inflate(R.layout.fragment_apple, container,
false);
ist = view.findViewById(R.id.linearLink);
second = view.findViewById(R.id.linearPhone);
return view;
其他回答
使用getView()或实现onViewCreated方法的View参数。它返回片段的根视图(由onCreateView()方法返回的)。这样你就可以调用findViewById()。
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
ImageView imageView = (ImageView) getView().findViewById(R.id.foo);
// or (ImageView) view.findViewById(R.id.foo);
因为getView()只在onCreateView()之后工作，你不能在片段的onCreate()或onCreateView()方法中使用它。
同意在视图上调用findViewById()。
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;
}
最简单的方法就是用黄油刀 这样你就可以像下面描述的那样通过@OnClick()添加尽可能多的Onclciklisteners:
public class TestClass extends Fragment {
@BindView(R.id.my_image) ImageView imageView;
@OnClick(R.id.my_image)
public void my_image_click(){
yourMethod();
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.testclassfragment, container, false);
ButterKnife.bind(getActivity,view);
return view;
}
}
试试这个，对我有用
public class TestClass extends Fragment {
private ImageView imageView;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.testclassfragment, container, false);
findViews(view);
return view;
}
private void findViews(View view) {
imageView = (ImageView) view.findViewById(R.id.my_image);
}
}
还有一个方法叫做onViewCreated。
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
ImageView imageView = (ImageView) view.findViewById(R.id.imageview1);
}
