Question

我有一个带有子LinearLayout的ScrollView。我通过单独的View方法以编程方式将TextViews和NumberPickers添加到LinearLayout。但是，单击包含ScrollView的选项卡时，不会显示动态对象。

这是我的代码：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

  View rootview = inflater.inflate(R.layout.activity_settings_tab, container, false);
  super.onCreate(savedInstanceState);
  myDb = new DatabaseHelper(getContext());

  rootview.findViewById(R.id.scroll_config);
  viewFunds();
  return rootview;
}

这是我提到的单独方法，它动态地将对象添加到LinearLayout：

public View viewFunds(View rootview) {

  ScrollView scrollView = new ScrollView(getActivity());
  scrollView.findViewById(R.id.scroll_config);
  LinearLayout linearLayout = new LinearLayout(getActivity());
  linearLayout.findViewById(R.id.ll_config);
  //final View linearLayout = getActivity().findViewById(R.id.ll_config);
  linearLayout.removeAllViews(); //clear layout first - LINE WITH ISSUE
  linearLayout.setGravity(Gravity.CENTER);

  LinearLayout.LayoutParams lp2 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
  LinearLayout.LayoutParams lp3 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

  //create dynamic objects inside scrollview and dynamic linear layout - horizontal
  for (int i = 0; i < res2.getCount(); i++) {
    LinearLayout llh = new LinearLayout(getActivity());
    llh.setOrientation(LinearLayout.HORIZONTAL);
    LinearLayout.LayoutParams lp_llh = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    llh.setLayoutParams(lp_llh);

    linearLayout.addView(llh);

    NumberPicker numberPicker = new NumberPicker(getActivity());
    numberPicker.setMinValue(0);
    numberPicker.setMaxValue(100);
    LinearLayout.LayoutParams lp_np = new LinearLayout.LayoutParams(70, LinearLayout.LayoutParams.WRAP_CONTENT);
    numberPicker.setLayoutParams(lp_np);
    numberPicker.setGravity(Gravity.CENTER_HORIZONTAL);

    //showMessage("value",res2.getString(3));
    numberPicker.setValue(Integer.parseInt(res2.getString(2))); //
    TextView textView = new TextView(getActivity());
    textView.setText( /*textArray[i] + " " +*/ res2.getString(1));


    llh.addView(textView);
    linearLayout.addView(numberPicker);

  }
  return scrollView;
}

我在这里做错了什么？

Answer 1

你正在使用片段你必须找到片段根视图的参考视图你的下面的语句什么都不做我会建议你通过android基本组件

 rootview.findViewById(R.id.scroll_config);

解决问题做以下

public View viewFunds(View rootview) {

  ScrollView scrollView = (ScrollView)rootview.findViewById(R.id.scroll_config);//considering scroll_config is scroll view in xml
  LinearLayout linearLayout =(LinearLayout)rootview.findViewById(R.id.ll_config);//considering ll_config is LinearLayout  in xml

  linearLayout.removeAllViews(); //clear layout first - LINE WITH ISSUE
  linearLayout.setGravity(Gravity.CENTER);

  LinearLayout.LayoutParams lp2 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
  LinearLayout.LayoutParams lp3 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);

  //create dynamic objects inside scrollview and dynamic linear layout - horizontal
  for (int i = 0; i < res2.getCount(); i++) {
    LinearLayout llh = new LinearLayout(getActivity());
    llh.setOrientation(LinearLayout.HORIZONTAL);
    LinearLayout.LayoutParams lp_llh = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
    llh.setLayoutParams(lp_llh);

    linearLayout.addView(llh);

    NumberPicker numberPicker = new NumberPicker(getActivity());
    numberPicker.setMinValue(0);
    numberPicker.setMaxValue(100);
    LinearLayout.LayoutParams lp_np = new LinearLayout.LayoutParams(70, LinearLayout.LayoutParams.WRAP_CONTENT);
    numberPicker.setLayoutParams(lp_np);
    numberPicker.setGravity(Gravity.CENTER_HORIZONTAL);

    //showMessage("value",res2.getString(3));
    numberPicker.setValue(Integer.parseInt(res2.getString(2))); //
    TextView textView = new TextView(getActivity());
    textView.setText( /*textArray[i] + " " +*/ res2.getString(1));


    llh.addView(textView);
    linearLayout.addView(numberPicker);///chek in which layou you want to add numberPicker

  }
}

并在oncreateview

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

  View rootview = inflater.inflate(R.layout.activity_settings_tab, container, false);
  super.onCreate(savedInstanceState);
  myDb = new DatabaseHelper(getContext());

  viewFunds(rootview);
  return rootview;
}

还要经过Android培训https://developer.android.com/training/index.html

动态视图未显示在片段中：android

1 个答案: