社交链接未添加到片段中

Question

我试图在我的应用程序中添加片段社交媒体链接。当我开始添加img_vk时，findViewById选择了红色。在空项目中ImageView工作正常

public class Fragment5 extends Fragment {
ImageView img_instagram,img_vk;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
img_vk = findViewById(R.id.img_vk);
img_vk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
gotoUrl("https://vk.com/1234");
}
});
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment5,container,false);
return rootView;
}
private void gotoUrl(String s) {
Uri uri = Uri.parse(s);
startActivity(new Intent(Intent.ACTION_VIEW,uri));
}
}

Answer 1

所以你应该首先膨胀fragment的视图，然后尝试在其中找到你的视图。

public class Fragment5 extends Fragment {
ImageView img_instagram,img_vk;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup)inflater.inflate(R.layout.fragment5,container,false);
img_vk = rootView.findViewById(R.id.img_vk);
img_vk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
gotoUrl("https://vk.com/1234");
}
});

return rootView;
}
private void gotoUrl(String s) {
Uri uri = Uri.parse(s);
startActivity(new Intent(Intent.ACTION_VIEW,uri));
}
}