我需要让用户在首选项中选择城市，有很多城市所以我用这个项目在列表中搜索，它工作得很好，但我需要在首选项 xml 中实现它，而不是在常规布局中。
这是我以前所拥有的，[主 Activity 类，在常规布局中工作正常]：
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/**
* Getting array of String to Bind in Spinner
*/
final List<String> list = Arrays.asList(getResources().getStringArray(R.array.sports_array));
/**
* Search MultiSelection Spinner (With Search/Filter Functionality)
*
* Using MultiSpinnerSearch class
*/
MultiSpinnerSearch searchSpinner = (MultiSpinnerSearch) findViewById(R.id.searchMultiSpinner);
final List<KeyPairBoolData> listArray = new ArrayList<KeyPairBoolData>();
for(int i=0; i<list.size(); i++) {
KeyPairBoolData h = new KeyPairBoolData();
h.setId(i+1);
h.setName(list.get(i));
h.setSelected(false);
listArray.add(h);
}
/***
* -1 is no by default selection
* 0 to length will select corresponding values
*/
searchSpinner.setItems(listArray, "Multi Selection With Filter", -1, new MultiSpinnerSearchListener() {
@Override
public void onItemsSelected(List<KeyPairBoolData> items) {
for(int i=0; i<items.size(); i++) {
if(items.get(i).isSelected()) {
Log.i("TAG", i + " : " + items.get(i).getName() + " : " + items.get(i).isSelected());
}
}
}
});
}
在我的布局中：
<com.androidbuts.multispinnerfilter.MultiSpinnerSearch
android:id="@+id/searchMultiSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_marginTop="20dp" >
</com.androidbuts.multispinnerfilter.MultiSpinnerSearch>
原来的课程是：
public class MultiSpinnerSearch extends Spinner implements OnCancelListener {
private List<KeyPairBoolData> items;
//private boolean[] selected;
private String defaultText;
private MultiSpinnerSearchListener listener;
MyAdapter adapter;
public MultiSpinnerSearch(Context context) {
super(context);
}
public MultiSpinnerSearch(Context arg0, AttributeSet arg1) {
super(arg0, arg1);
}
public MultiSpinnerSearch(Context arg0, AttributeSet arg1, int arg2) {
super(arg0, arg1, arg2);
}
@Override
public void onCancel(DialogInterface dialog) {
// refresh text on spinner
StringBuffer spinnerBuffer = new StringBuffer();
for (int i = 0; i < items.size(); i++) {
if (items.get(i).isSelected() == true) {
spinnerBuffer.append(items.get(i).getName());
spinnerBuffer.append(", ");
}
}
String spinnerText = "";
spinnerText = spinnerBuffer.toString();
if (spinnerText.length() > 2)
spinnerText = spinnerText.substring(0, spinnerText.length() - 2);
else
spinnerText = defaultText;
ArrayAdapter<String> adapterSpinner = new ArrayAdapter<String>(getContext(),
R.layout.textview_for_spinner,
new String[] { spinnerText });
setAdapter(adapterSpinner);
if(adapter != null)
adapter.notifyDataSetChanged();
listener.onItemsSelected(items);
}
@Override
public boolean performClick() {
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle(defaultText);
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE );
View view = inflater.inflate(R.layout.alert_dialog_listview_search, null);
builder.setView(view);
final ListView listView = (ListView) view.findViewById(R.id.alertSearchListView);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
listView.setFastScrollEnabled(false);
adapter = new MyAdapter(getContext(), items);
listView.setAdapter(adapter);
EditText editText = (EditText) view.findViewById(R.id.alertSearchEditText);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
adapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
//builder.setMultiChoiceItems(items.toArray(new CharSequence[items.size()]), selected, this);
builder.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// items = (ArrayList<KeyPairBoolData>) adapter.arrayList;
Log.i("TAG", " ITEMS : " + items.size() );
dialog.cancel();
}
});
builder.setOnCancelListener(this);
builder.show();
return true;
}
public void setItems(List<KeyPairBoolData> items, String allText, int position,
MultiSpinnerSearchListener listener) {
this.items = items;
this.defaultText = allText;
this.listener = listener;
ArrayAdapter<String> adapterSpinner = new ArrayAdapter<String>(getContext(),
R.layout.textview_for_spinner,
new String[] { defaultText });
setAdapter(adapterSpinner);
if(position != -1)
{
items.get(position).setSelected(true);
//listener.onItemsSelected(items);
onCancel(null);
}
}
public interface MultiSpinnerSearchListener {
public void onItemsSelected(List<KeyPairBoolData> items);
}
// // Adapter Class
public class MyAdapter extends BaseAdapter implements Filterable {
List<KeyPairBoolData> arrayList;
List<KeyPairBoolData> mOriginalValues; // Original Values
LayoutInflater inflater;
public MyAdapter(Context context, List<KeyPairBoolData> arrayList) {
this.arrayList = arrayList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
private class ViewHolder {
TextView textView;
CheckBox checkBox;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.alert_dialog_listview_search_subview, null);
holder.textView = (TextView) convertView.findViewById(R.id.alertTextView);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.alertCheckbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final KeyPairBoolData data = arrayList.get(position);
holder.textView.setText(data.getName());
holder.checkBox.setChecked(data.isSelected());
convertView.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
ViewHolder temp = (ViewHolder) v.getTag();
temp.checkBox.setChecked(!temp.checkBox.isChecked());
int len = arrayList.size();
for (int i = 0; i < len; i++)
{
if (i == position)
{
data.setSelected(!data.isSelected());
Log.i("TAG", "On Click Selected : " + data.getName() + " : " + data.isSelected());
break;
}
}
}
});
holder.checkBox.setTag(holder);
return convertView;
}
@SuppressLint("DefaultLocale")
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
arrayList = (List<KeyPairBoolData>) results.values; // has the filtered values
notifyDataSetChanged(); // notifies the data with new filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
List<KeyPairBoolData> FilteredArrList = new ArrayList<KeyPairBoolData>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<KeyPairBoolData>(arrayList); // saves the original data in mOriginalValues
}
/********
*
* If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
* else does the Filtering and returns FilteredArrList(Filtered)
*
********/
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
Log.i("TAG", "Filter : " + mOriginalValues.get(i).getName() + " -> " + mOriginalValues.get(i).isSelected());
String data = mOriginalValues.get(i).getName();
if (data.toLowerCase().contains(constraint.toString())) {
FilteredArrList.add(mOriginalValues.get(i));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}
}
这就是我想要做的，PreferencesSpinner 类（几乎和上面一样）：
public class PreferencesSpinner extends DialogPreference implements OnCancelListener {
private List<KeyPairBoolData> items;
public Spinner spinner;
//private boolean[] selected;
private String defaultText;
private PreferencesSpinnerListener listener;
MyAdapter adapter;
public PreferencesSpinner(Context context) {
super(context);
}
public PreferencesSpinner(Context arg0, AttributeSet arg1) {
super(arg0, arg1);
}
public PreferencesSpinner(Context arg0, AttributeSet arg1, int arg2) {
super(arg0, arg1, arg2);
}
@Override
public void onCancel(DialogInterface dialog) {
// refresh text on spinner
StringBuffer spinnerBuffer = new StringBuffer();
for (int i = 0; i < items.size(); i++) {
if (items.get(i).isSelected() == true) {
spinnerBuffer.append(items.get(i).getName());
spinnerBuffer.append(", ");
}
}
String spinnerText = "";
spinnerText = spinnerBuffer.toString();
if (spinnerText.length() > 2)
spinnerText = spinnerText.substring(0, spinnerText.length() - 2);
else
spinnerText = defaultText;
ArrayAdapter<String> adapterSpinner = new ArrayAdapter<String>(getContext(),
R.layout.textview_for_spinner,
new String[] { spinnerText });
spinner.setAdapter(adapterSpinner);
if(adapter != null)
adapter.notifyDataSetChanged();
listener.onItemsSelected(items);
}
public boolean performClick() {
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle(defaultText);
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE );
View view = inflater.inflate(R.layout.alert_dialog_listview_search, null);
builder.setView(view);
final ListView listView = (ListView) view.findViewById(R.id.alertSearchListView);
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
listView.setFastScrollEnabled(false);
adapter = new MyAdapter(getContext(), items);
listView.setAdapter(adapter);
EditText editText = (EditText) view.findViewById(R.id.alertSearchEditText);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
adapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
//builder.setMultiChoiceItems(items.toArray(new CharSequence[items.size()]), selected, this);
builder.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// items = (ArrayList<KeyPairBoolData>) adapter.arrayList;
Log.i("TAG", " ITEMS : " + items.size() );
dialog.cancel();
}
});
builder.setOnCancelListener(this);
builder.show();
return true;
}
public void setItems(List<KeyPairBoolData> items, String allText, int position,
PreferencesSpinnerListener listener) {
this.items = items;
this.defaultText = allText;
this.listener = listener;
ArrayAdapter<String> adapterSpinner = new ArrayAdapter<String>(getContext(),
R.layout.textview_for_spinner,
new String[] { defaultText });
spinner.setAdapter(adapterSpinner);
if(position != -1)
{
items.get(position).setSelected(true);
//listener.onItemsSelected(items);
onCancel(null);
}
}
public interface PreferencesSpinnerListener {
public void onItemsSelected(List<KeyPairBoolData> items);
}
// // Adapter Class
public class MyAdapter extends BaseAdapter implements Filterable {
List<KeyPairBoolData> arrayList;
List<KeyPairBoolData> mOriginalValues; // Original Values
LayoutInflater inflater;
public MyAdapter(Context context, List<KeyPairBoolData> arrayList) {
this.arrayList = arrayList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
private class ViewHolder {
TextView textView;
CheckBox checkBox;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.alert_dialog_listview_search_subview, null);
holder.textView = (TextView) convertView.findViewById(R.id.alertTextView);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.alertCheckbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final KeyPairBoolData data = arrayList.get(position);
holder.textView.setText(data.getName());
holder.checkBox.setChecked(data.isSelected());
convertView.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
ViewHolder temp = (ViewHolder) v.getTag();
temp.checkBox.setChecked(!temp.checkBox.isChecked());
int len = arrayList.size();
for (int i = 0; i < len; i++)
{
if (i == position)
{
data.setSelected(!data.isSelected());
Log.i("TAG", "On Click Selected : " + data.getName() + " : " + data.isSelected());
break;
}
}
}
});
holder.checkBox.setTag(holder);
return convertView;
}
@SuppressLint("DefaultLocale")
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
arrayList = (List<KeyPairBoolData>) results.values; // has the filtered values
notifyDataSetChanged(); // notifies the data with new filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
List<KeyPairBoolData> FilteredArrList = new ArrayList<KeyPairBoolData>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<KeyPairBoolData>(arrayList); // saves the original data in mOriginalValues
}
/********
*
* If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values
* else does the Filtering and returns FilteredArrList(Filtered)
*
********/
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
Log.i("TAG", "Filter : " + mOriginalValues.get(i).getName() + " -> " + mOriginalValues.get(i).isSelected());
String data = mOriginalValues.get(i).getName();
if (data.toLowerCase().contains(constraint.toString())) {
FilteredArrList.add(mOriginalValues.get(i));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}
}
使用 Preferences.xml：
<com.androidbuts.multispinnerfilter.PreferencesSpinner
android:key="spinner"
android:title="spinner Title"
android:summary="Summary"/>
当然还有 Preferences 类：
public class Preferences extends PreferenceActivity {
public PreferencesSpinner searchSpinner;
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
final List<String> list = Arrays.asList(getResources().getStringArray(R.array.sports_array));
final List<KeyPairBoolData> listArray = new ArrayList<KeyPairBoolData>();
for(int i=0; i<list.size(); i++) {
KeyPairBoolData h = new KeyPairBoolData();
h.setId(i+1);
h.setName(list.get(i));
h.setSelected(false);
listArray.add(h);
}
searchSpinner = (PreferencesSpinner) findPreference("spinner");
searchSpinner.setItems(listArray, "all text", -1, new PreferencesSpinner.PreferencesSpinnerListener() {
@Override
public void onItemsSelected(List<KeyPairBoolData> items) {
}
});
}
任何人都可以帮助我迁移到偏好活动吗？
谢谢！