我的活动中有很多文字观点。 例如，如果我单击颜色文本视图。将出现一个对话框，其中包含从mColourArray填充的颜色列表。然后我应该能够选择颜色并在mColourArraySelected中返回结果。 mAlphabetArray和mAlphabetArraySelected也是如此。
下面的问题是当我尝试在案例陈述中指定mColourArraySelected时它是空的，因为在onClick事件中没有返回MultiDialog中的resultList。
它不会让我改变onClick返回List所以我该如何实现回调？
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.textViewColour:
mColourArraySelected = MultiDialog(mColourArray);
break;
case R.id.textViewAlphabet:
mAlphabetArraySelected = MultiDialog(mAlphabetArray);
break;
break;
}
}
public List<String> MultiDialog(final List<String> list ) {
resultList.clear();
final String[] array = new String [list.size()] ;
for (int i=0; i<list.size(); i++) {
array[i]=list.get(i);
}
final ArrayList mSelectedItems = new ArrayList(); // Where we track the selected items
AlertDialog.Builder builder = new AlertDialog.Builder(SearchActivity.this);
// Set the dialog title
builder.setTitle("multi select")
// Specify the list array, the items to be selected by default (null for none),
// and the listener through which to receive callbacks when items are selected
.setMultiChoiceItems(array, null,
new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which,
boolean isChecked) {
if (isChecked) {
// If the user checked the item, add it to the selected items
mSelectedItems.add(which);
} else if (mSelectedItems.contains(which)) {
// Else, if the item is already in the array, remove it
mSelectedItems.remove(Integer.valueOf(which));
}
}
})
// Set the action buttons
.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// User clicked OK, so save the mSelectedItems results somewhere
// or return them to the component that opened the dialog
for (int i=0; i<mSelectedItems.size(); i++) {
int pos = (int) mSelectedItems.get(i);
resultList.add(list.get(pos));
}
}
})
.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
}
});
AlertDialog dialog = builder.create();
dialog.show();
return resultList;
}