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
非常简单的方法:
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View fragmentView = inflater.inflate(R.layout.testclassfragment, container, false);
ImageView imageView = (ImageView)fragmentView.findViewById(R.id.my_image);
return fragmentView;
}
其他回答
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;
}
}
EditText name = (EditText) getView().findViewById(R.id.editText1);
EditText add = (EditText) getView().findViewById(R.id.editText2);
非常简单的方法:
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View fragmentView = inflater.inflate(R.layout.testclassfragment, container, false);
ImageView imageView = (ImageView)fragmentView.findViewById(R.id.my_image);
return fragmentView;
}
首先获取片段视图，然后从这个视图获取ImageView。
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.testclassfragment, container, false);
ImageView imageView = (ImageView) view.findViewById(R.id.my_image);
return view;
}
你也可以在onActivityCreated方法中做。
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
就像他们在这里做的:http://developer.android.com/reference/android/app/Fragment.html(在API级别28中已弃用)
getView().findViewById(R.id.foo);
and
getActivity().findViewById(R.id.foo);
是有可能的。
