findViewById returns 片段 class 中为空

Question

片断class中的findViewById()returnsnull。 ImageButton 的 Toast 显示了 Switch 的对象，即 mySwitch returns null...请帮忙....

public MyAdapter(Context context, List<ListItems> values) {

    super(context, R.layout.list_item, values);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    View v = convertView;
    LayoutInflater inflater = LayoutInflater.from(getContext());

    if( v == null){
        v = inflater.inflate(R.layout.list_item, parent, false);
    }

    ListItems currLoc = LocationList.get(position);

    TextView theTextView = (TextView) v.findViewById(R.id.list_item_textview);
    theTextView.setText(currLoc.getLocation());

    TextView theTextView2 = (TextView) v.findViewById(R.id.list_item_textviewP);
    theTextView2.setText(currLoc.getProfile());

    ImageView theImageView = (ImageView) v.findViewById(R.id.imageview1);
    Toast.makeText(getActivity(), "image view="+theImageView, Toast.LENGTH_SHORT).show();
    theImageView.setImageResource(R.drawable.bullet);


    Switch mySwitch=(Switch) v.findViewById(R.id.onoff);
    Toast.makeText(getActivity(), ""+mySwitch, Toast.LENGTH_SHORT).show();


    return v;
}

Answer 1

我明白了.... 我在 onGetView 中定义了 findViewById 我必须在 OnCreateView 上声明它对不起.....

findViewById returns 片段 class 中为空

findViewById returns null in fragment class

android

android-fragments

findviewbyid