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September 29, 2024 07:36
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| package com.xxx.xxx; | |
| import android.app.AlertDialog; | |
| import android.content.Context; | |
| import android.content.DialogInterface; | |
| import android.util.AttributeSet; | |
| import android.widget.ArrayAdapter; | |
| import android.widget.Spinner; | |
| import java.util.Arrays; | |
| import java.util.List; | |
| public class MultiSpinner extends Spinner implements DialogInterface.OnMultiChoiceClickListener, DialogInterface.OnCancelListener { | |
| private List<String> items; | |
| private boolean[] selected; | |
| private String defaultText; | |
| private MultiSpinnerListener listener; | |
| public MultiSpinner(Context context) { | |
| super(context); | |
| } | |
| public MultiSpinner(Context arg0, AttributeSet arg1) { | |
| super(arg0, arg1); | |
| } | |
| public MultiSpinner(Context arg0, AttributeSet arg1, int arg2) { | |
| super(arg0, arg1, arg2); | |
| } | |
| @Override | |
| public void onClick(DialogInterface dialog, int which, boolean isChecked) { | |
| selected[which] = isChecked; | |
| } | |
| @Override | |
| public void onCancel(DialogInterface dialog) { | |
| // refresh text on spinner | |
| StringBuilder spinnerBuffer = new StringBuilder(); | |
| boolean someSelected = false; | |
| for (int i = 0; i < items.size(); i++) { | |
| if (selected[i]) { | |
| spinnerBuffer.append(items.get(i)); | |
| spinnerBuffer.append(", "); | |
| someSelected = true; | |
| } | |
| } | |
| String spinnerText; | |
| if (someSelected) { | |
| spinnerText = spinnerBuffer.toString(); | |
| if (spinnerText.length() > 2) {spinnerText = spinnerText.substring(0, spinnerText.length() - 2);} | |
| } else { | |
| spinnerText = defaultText; | |
| } | |
| ArrayAdapter<String> adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_spinner_item, new String[]{spinnerText}); | |
| setAdapter(adapter); | |
| listener.onItemsSelected(selected); | |
| } | |
| @Override | |
| public boolean performClick() { | |
| AlertDialog.Builder builder = new AlertDialog.Builder(getContext()); | |
| builder.setMultiChoiceItems(items.toArray(new CharSequence[0]), selected, this); | |
| builder.setPositiveButton(android.R.string.ok, (dialog, which) -> dialog.cancel()); | |
| builder.setOnCancelListener(this); | |
| builder.show(); | |
| return true; | |
| } | |
| public void setItems(List<String> items, String allText, MultiSpinnerListener listener) { | |
| this.items = items; | |
| this.defaultText = allText; | |
| this.listener = listener; | |
| // all [not] selected by default | |
| selected = new boolean[items.size()]; | |
| Arrays.fill(selected, false); | |
| // all text on the spinner | |
| ArrayAdapter<String> adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_spinner_item, new String[]{allText}); | |
| setAdapter(adapter); | |
| } | |
| public interface MultiSpinnerListener { | |
| public void onItemsSelected(boolean[] selected); | |
| } | |
| } |
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