如何在导航抽屉活动的片段中使用具有多项选择的 Android Spinner

How to use Android Spinner with multiple choice in Fragment of Navigation drawer activity

如何创建允许选择多个项目的微调器，即带有复选框的微调器？同时我需要在导航抽屉活动的片段中使用这个多选微调器。

任何人都可以用合适的示例代码解决我的疑问。

提前谢谢你！！！

public class Doctor extends Fragment {
public Doctor() {
// Required empty public constructor
}

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@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
// Inflate the layout for this fragment
getActivity().setTitle("Doctor");
View v = inflater.inflate(R.layout.fragment_doctor, container, false);
String [] values =
{"All Town","Paris","Kodambakkam","Nungambakkam","T.Nagar","Egmore"};
Spinner spinner = (Spinner) v.findViewById(R.id.town);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner.setAdapter(adapter);

String [] values1 =
{"Select Doctor","Doctor1","Doctor2","Doctor3","Doctor4"};
Spinner spinner1 = (Spinner) v.findViewById(R.id.doctor);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values1);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner1.setAdapter(adapter1);

String [] values2 =
{"Worked With","Nagaraj","Muthuvel"};
Spinner spinner2 = (Spinner) v.findViewById(R.id.doctor);
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values2);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner2.setAdapter(adapter2);

return v;
}
public void onViewCreated(View view,@Nullable Bundle savedInstanceState){
super.onViewCreated(view, savedInstanceState);

}

我需要将 spinner2 更改为我们的多项选择微调器。我正在从 Fragment 扩展课程。所以不知道如何处理这个多选微调器

1

How do I create spinner which allows to choose multiple items, i.e spinner with check boxes?

尝试使用 multiselectionspinner。
https://stackoverflow.com/a/6022474/6616489

对于

multiple choice spinner inside the fragment of Navigation drawer

参考 https://stackoverflow.com/a/20017862/6616489

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public class Doctor extends Fragment{

MultiSelectionSpinner spinner2;
FragmentManager fm = getFragmentManager();
public Doctor() {
// Required empty public constructor
}

String [] values =
{"All Town","Paris","Kodambakkam","Nungambakkam","T.Nagar","Egmore"};
Spinner spinner = (Spinner) v.findViewById(R.id.town);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner.setAdapter(adapter);

String [] values1 =
{"Select Doctor","Doctor1","Doctor2","Doctor3","Doctor4"};
Spinner spinner1 = (Spinner) v.findViewById(R.id.se_doctor);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, values1);
adapter1.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner1.setAdapter(adapter1);

String [] values2 =
{"Worked With","Nagaraj","Muthuvel"};
// Multi spinner
spinner2 = (MultiSelectionSpinner)v.findViewById(R.id.work);
spinner2.setItems(values2);return v;
}}

上面的代码是多选微调器(注：微调器2)

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public class MultiSelectionSpinner extends Spinner implements
OnMultiChoiceClickListener {
String[] _items = null;
boolean[] mSelection = null;

ArrayAdapter<String> simple_adapter;

public MultiSelectionSpinner(Context context) {
super(context);

simple_adapter = new ArrayAdapter<String>(context,
android.R.layout.simple_spinner_item);
super.setAdapter(simple_adapter);
}

public MultiSelectionSpinner(Context context, AttributeSet attrs) {
super(context, attrs);

simple_adapter = new ArrayAdapter<String>(context,
android.R.layout.simple_spinner_item);
super.setAdapter(simple_adapter);
}

public void onClick(DialogInterface dialog, int which, boolean isChecked) {
if (mSelection != null && which < mSelection.length) {
mSelection[which] = isChecked;

simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
} else {
throw new IllegalArgumentException(
"Argument ‘which’ is out of bounds.");
}
}

@Override
public boolean performClick() {
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setMultiChoiceItems(_items, mSelection, this);
builder.show();
return true;
}

@Override
public void setAdapter(SpinnerAdapter adapter) {
throw new RuntimeException(
"setAdapter is not supported by MultiSelectSpinner.");
}

public void setItems(String[] items) {
_items = items;
mSelection = new boolean[_items.length];
simple_adapter.clear();
simple_adapter.add(_items[0]);
Arrays.fill(mSelection, false);
}

public void setItems(List<String> items) {
_items = items.toArray(new String[items.size()]);
mSelection = new boolean[_items.length];
simple_adapter.clear();
simple_adapter.add(_items[0]);
Arrays.fill(mSelection, false);
}

public void setSelection(String[] selection) {
for (String cell : selection) {
for (int j = 0; j < _items.length; ++j) {
if (_items[j].equals(cell)) {
mSelection[j] = true;
}
}
}
}

public void setSelection(List<String> selection) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
}
for (String sel : selection) {
for (int j = 0; j < _items.length; ++j) {
if (_items[j].equals(sel)) {
mSelection[j] = true;
}
}
}
simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
}

public void setSelection(int index) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
}
if (index >= 0 && index < mSelection.length) {
mSelection[index] = true;
} else {
throw new IllegalArgumentException("Index" + index
+" is out of bounds.");
}
simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
}

public void setSelection(int[] selectedIndicies) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
}
for (int index : selectedIndicies) {
if (index >= 0 && index < mSelection.length) {
mSelection[index] = true;
} else {
throw new IllegalArgumentException("Index" + index
+" is out of bounds.");
}
}
simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
}

public List<String> getSelectedStrings() {
List<String> selection = new LinkedList<String>();
for (int i = 0; i < _items.length; ++i) {
if (mSelection[i]) {
selection.add(_items[i]);
}
}
return selection;
}

public List<Integer> getSelectedIndicies() {
List<Integer> selection = new LinkedList<Integer>();
for (int i = 0; i < _items.length; ++i) {
if (mSelection[i]) {
selection.add(i);
}
}
return selection;
}

private String buildSelectedItemString() {
StringBuilder sb = new StringBuilder();
boolean foundOne = false;

for (int i = 0; i < _items.length; ++i) {
if (mSelection[i]) {
if (foundOne) {
sb.append(",");
}
foundOne = true;

sb.append(_items[i]);
}
}
return sb.toString();
}

public String getSelectedItemsAsString() {
StringBuilder sb = new StringBuilder();
boolean foundOne = false;

for (int i = 0; i < _items.length; ++i) {
if (mSelection[i]) {
if (foundOne) {
sb.append(",");
}
foundOne = true;
sb.append(_items[i]);
}
}
return sb.toString();
}}

以上代码用于创建从 spinner2 调用的多选微调器。

请检查代码。如果有任何疑问，请在此处发表评论，让我尝试消除您的疑问。

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/269037.html

如何在导航抽屉活动的片段中使用具有多项选择的 Android Spinner

How to use Android Spinner with multiple choice in Fragment of Navigation drawer activity

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