Define custom interface which is given callback from multiple item selection dialog.
public interface MultipleItemSelectListener {
public void onSelected(String value,String ids);
}
Custom Multiple item selection dialog method.
Parameters
Content : your activity content reference.
title : dialog title.
jsonArrayString : your jsonarray response as string.
MultipleItemSelectListener : custom on item selected listener.
public void getMultiSelectionDialog(final Context context,final String title, String jsonString, final String value, final MultipleItemSelectListener target) {
final ArrayList<String> values = new ArrayList<String>();
final ArrayList<String> ids = new ArrayList<String>();
final String BUSINESS_ID="id";
final String BUSINESS_NAME="name";
try {
JSONArray jsonArray = new JSONArray(jsonString);
int size = jsonArray.length();
for (int i = 0; i < size; i++) {
values.add(((JSONObject) jsonArray.get(i)).getString(BUSINESS_NAME).trim());
ids.add(((JSONObject) jsonArray.get(i)).getString(BUSINESS_ID).trim());
}
} catch (JSONException e) {
e.printStackTrace();
}
final boolean[] selections = new boolean[values.size()];
final StringBuilder newValue = new StringBuilder();
final StringBuilder newIds = new StringBuilder();
AlertDialog alert = null;
if (value.length() > 0) {
String[] oldValue = value.split(",");
int size = values.size();
for (int i = 0; i < size; i++) {
int len = oldValue.length;
for (int j = 0; j < len; j++) {
if (values.get(i).trim().equalsIgnoreCase(oldValue[j].trim())) {
selections[i] = true;
break;
}
}
}
}
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(title);
builder.setMultiChoiceItems(values.toArray(new CharSequence[values.size()]), selections, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
selections[which] = isChecked;
}
});
builder.setPositiveButton("Done", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
int size = selections.length;
for (int i = 0; i < size; i++) {
if (selections[i]) {
newValue.append(newValue.length() > 0 ? "," + values.get(i) : values.get(i));
newIds.append(newIds.length() > 0 ? "," + ids.get(i) : ids.get(i));
}
}
target.onSelected(newValue.toString(),newIds.toString());
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
int size = selections.length;
for (int i = 0; i < size; i++) {
if (selections[i]) {
newIds.append(newIds.length() > 0 ? "," + ids.get(i) : ids.get(i));
}
}
target.onSelected(value,newIds.toString());
}
});
alert = builder.create();
alert.show();
}
How to getMultiSelectionDialog :
class LoadBusiness extends AsyncTask<Void,Void,String> {
Context context;
public LoadBusiness(Context context){
this.context=context;
}
private ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(context);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(Void... params) {
ServiceHandler sh = new ServiceHandler();
String jsonStr = sh.makeServiceCall(BUSINESS_URL, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
return jsonStr;
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
pDialog.dismiss();
setTextViewWithMultipleSelectionDialog(context,result);
}
}
public void setTextViewWithMultipleSelectionDialog(final Context context,final String jsonArrayString){
splang.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getMultiSelectionDialog(context,"Countries",jsonArrayString,splang.getText().toString(),new MultipleItemSelectListener() {
@Override
public void onSelected(String value) {
splang.setText(value);
}
});
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
splang=(TextView)findViewById(R.id.txtvw);
new LoadBusiness(this).execute();
}