问题
I have a xml layout which is having 2 to 3 multiple selection spinner. I have one submit button too.
Then my doubt is how can i get the selected values for each spinner . And the i have to save these values too . So how can i get the selected values. And how can i came to know which is spinner that the user selected , I am able to get the selected value on public void selectedStrings(List strings) but how i can differentiate which values are for my 1st spinner and for 2nd spinner and 3rd spinner. Do you have any idea..?
My code
public class DashBoardOne extends Fragment implements MultiSelectionSpinner.OnMultipleItemsSelectedListener{
MultiSelectionSpinner multiSelectionSpinnerIndustry,multiSelectionSpinnerLocation;
List<String> arrayIndustry,arrayLocation;
Button BtnSubmitAspiration;
public DashBoardOne() {
arrayIndustry = new ArrayList<String>();
}
public static DashBoardOne newInstance(String text) {
DashBoardOne dashBoardOne = null;
// some code
return dashBoardOne;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_dashboard, container, false);
multiSelectionSpinnerIndustry = (MultiSelectionSpinner) view.findViewById(R.id.SpinnerIndustry);
arrayIndustry=db.fillIndustrySpinner(); // gettting the list for first spinner from db
arrayLocation=db.fillLocationSpinner(); // gettting the list for 2nd spinner from db
multiSelectionSpinnerIndustry.setItems(arrayIndustry); //first spinner
multiSelectionSpinnerIndustry.setListener(this);
multiSelectionSpinnerLocation.setItems(arrayLocation); // 2nd spinner
multiSelectionSpinnerLocation.setListener(this);
BtnSubmitAspiration=(Button)view.findViewById(R.id.BtnSubmitAspiration);
BtnSubmitAspiration.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// here i have some code to save the data. How can i get the selected values for my each multiSelectionSpinner ?
}
});
}
@Override
public void selectedIndices(List<Integer> indices) {
}
@Override
public void selectedStrings(List<String> strings) {
Toast.makeText(getActivity().ge
tApplicationContext(),
strings.toString(), Toast.LENGTH_LONG).show(); // here i am able to get the selected strings,
//But i dont know how to diffrentiate the current value for which spinner
}
}
class MultiSelectionSpinner
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.util.AttributeSet;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
public class MultiSelectionSpinner extends Spinner implements
OnMultiChoiceClickListener {
public interface OnMultipleItemsSelectedListener{
void selectedIndices(List<Integer> indices);
void selectedStrings(List<String> strings);
}
private OnMultipleItemsSelectedListener listener;
String[] _items = null;
boolean[] mSelection = null;
boolean[] mSelectionAtStart = null;
String _itemsAtStart = null;
ArrayAdapter<String> simple_adapter;
public MultiSelectionSpinner(Context context) {
super(context);
simple_adapter = new ArrayAdapter<>(context,
android.R.layout.simple_spinner_item);
super.setAdapter(simple_adapter);
}
public MultiSelectionSpinner(Context context, AttributeSet attrs) {
super(context, attrs);
simple_adapter = new ArrayAdapter<>(context,
android.R.layout.simple_spinner_item);
super.setAdapter(simple_adapter);
}
public void setListener(OnMultipleItemsSelectedListener listener){
this.listener = listener;
}
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.setTitle("Please select!!!");
builder.setMultiChoiceItems(_items, mSelection, this);
_itemsAtStart = getSelectedItemsAsString();
builder.setPositiveButton("Submit", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
System.arraycopy(mSelection, 0, mSelectionAtStart, 0, mSelection.length);
listener.selectedIndices(getSelectedIndices());
listener.selectedStrings(getSelectedStrings());
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
simple_adapter.clear();
simple_adapter.add(_itemsAtStart);
System.arraycopy(mSelectionAtStart, 0, mSelection, 0, mSelectionAtStart.length);
}
});
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];
mSelectionAtStart = new boolean[_items.length];
simple_adapter.clear();
simple_adapter.add(_items[0]);
Arrays.fill(mSelection, false);
mSelection[0] = true;
mSelectionAtStart[0] = true;
}
public void setItems(List<String> items) {
_items = items.toArray(new String[items.size()]);
mSelection = new boolean[_items.length];
mSelectionAtStart = new boolean[_items.length];
simple_adapter.clear();
simple_adapter.add(_items[0]);
Arrays.fill(mSelection, false);
mSelection[0] = true;
}
public void setSelection(String[] selection) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
mSelectionAtStart[i] = false;
}
for (String cell : selection) {
for (int j = 0; j < _items.length; ++j) {
if (_items[j].equals(cell)) {
mSelection[j] = true;
mSelectionAtStart[j] = true;
}
}
}
simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
}
public void setSelection(List<String> selection) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
mSelectionAtStart[i] = false;
}
for (String sel : selection) {
for (int j = 0; j < _items.length; ++j) {
if (_items[j].equals(sel)) {
mSelection[j] = true;
mSelectionAtStart[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;
mSelectionAtStart[i] = false;
}
if (index >= 0 && index < mSelection.length) {
mSelection[index] = true;
mSelectionAtStart[index] = true;
} else {
throw new IllegalArgumentException("Index " + index
+ " is out of bounds.");
}
simple_adapter.clear();
simple_adapter.add(buildSelectedItemString());
}
public void setSelection(int[] selectedIndices) {
for (int i = 0; i < mSelection.length; i++) {
mSelection[i] = false;
mSelectionAtStart[i] = false;
}
for (int index : selectedIndices) {
if (index >= 0 && index < mSelection.length) {
mSelection[index] = true;
mSelectionAtStart[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<>();
for (int i = 0; i < _items.length; ++i) {
if (mSelection[i]) {
selection.add(_items[i]);
}
}
return selection;
}
public List<Integer> getSelectedIndices() {
List<Integer> selection = new LinkedList<>();
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();
}
}
回答1:
You can get selected item for each spinner when button is clicked.Like this
spinner.getSelectedItem().toString();
回答2:
You could set a setOnItemSelectedListener for each spinner and handle items choices on respective arraylists.
Just like that:
Spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
Good luck.
来源：https://stackoverflow.com/questions/41740574/android-a-layout-contains-multiple-multiselectionspinner