Develop Reference

How to reset spinner list when fragment resume?

I have two spinner in my application which populating list from sqlite and it is working fine. When I select State in first spinner then second spinner list populate depend on first spinner. Now what I want that when I select item in both spinner and then I press back and again launch the activity then the list of second spinner still there. I want to clear list of second spinner when I press back button and Populate list in second spinner when user select value in first spinner.
public void fillStateData() {
try {
ArrayList<String> state_array = new ArrayList<String>();
state_array.add("Select State");
Cursor cursor_State = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nCtgId = 6", null);
if (cursor_State.moveToFirst()) {
do {
//assing values
String stateID = cursor_State.getString(0);
String stateName = cursor_State.getString(1);
stateData = stateName;
state_array.add(stateData);
} while (cursor_State.moveToNext());
}
ArrayAdapter my_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, state_array);
spnState.setAdapter(my_Adapter);
cursor_State.close();
spnState.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
state = spnState.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + state + "'", null);
if (cursor.moveToFirst()) {
stateCodeId = cursor.getString(0);
}
cursor.close();
fillDistrictData(stateCodeId);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
public void fillDistrictData(String stateCodeId) {
try {
district_array = new ArrayList<String>();
district_array.clear();
district_array.add("Select District");
Cursor cursor_District = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nParentSerialNo = '" + stateCodeId + "'", null);
if (cursor_District.moveToFirst()) {
do {
//assing values
String districtID = cursor_District.getString(0);
String districtName = cursor_District.getString(1);
districtData = districtName;
district_array.add(districtData);
} while (cursor_District.moveToNext());
}
district_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, district_array);
spnDistrict.setAdapter(district_Adapter);
cursor_District.close();
spnDistrict.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
district = spnDistrict.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + district + "'", null);
if (cursor.moveToFirst()) {
do {
//assing values
districtCodeId = cursor.getString(0);
} while (cursor.moveToNext());
}
cursor.close();
fillTalukaData(districtCodeId);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
}

add this method to activity.Hope this will work .
#Override
public void onBackPressed() {
spnDistrict.getAdapter().clear();
spnDistrict.getAdapter().notifyDataSetChanged();
finish();
}

Try using
adapter.clear();
spinner.setAdapter(new ArrayAdapter<String>(YourActivity.this,android.R.layout.simple_dropdown_item_1line,adapter));

Use Onresume for clear the array list you want
#Override
public void onResume() {
Log.e("DEBUG", "onResume of LoginFragment");
state_array.clear();
district_array.clear();
super.onResume();
}
or in onCreate view After Inttilizing array clean both arrayList.

Second spinner not loading based on previous spinner from sqlite

I am populating two spinner from sqlite. Now what I want that when my Activity is created then all state populate in spnState. But when I select any state from spinner then I want to bind District from sqlite in spnDistrict. I am getting problem when I select state after that list of district not showing in district spinner it is only showing "select district". How can I achieve that.
public void SpinnerValue(){
/*-----------------------Fill State start here----------------------------*/
try {
ArrayList<String> state_array = new ArrayList<String>();
state_array.add("Select State");
Cursor cursor_State = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nCtgId = 6", null);
if (cursor_State.moveToFirst()) {
do {
//assing values
String stateID = cursor_State.getString(0);
String stateName = cursor_State.getString(1);
stateData = stateName;
state_array.add(stateData);
} while (cursor_State.moveToNext());
}
ArrayAdapter my_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, state_array);
spnState.setAdapter(my_Adapter);
cursor_State.close();
spnState.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
state = spnState.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + state + "'", null);
if (cursor.moveToFirst()) {
do {
//assing values
stateCodeId = cursor.getString(0);
} while (cursor.moveToNext());
}
cursor.close();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
/*-----------------------Fill District start here----------------------------*/
try {
ArrayList<String> district_array = new ArrayList<String>();
district_array.add("Select District");
Cursor cursor_District = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nParentSerialNo = '"+stateCodeId+"'", null);
if (cursor_District.moveToFirst()) {
do {
//assing values
String districtID = cursor_District.getString(0);
String districtName = cursor_District.getString(1);
districtData = districtName;
district_array.add(districtData);
} while (cursor_District.moveToNext());
}
ArrayAdapter district_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, district_array);
spnDistrict.setAdapter(district_Adapter);
cursor_District.close();
spnDistrict.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
district = spnDistrict.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + district + "'", null);
if (cursor.moveToFirst()) {
do {
//assing values
districtCodeId = cursor.getString(0);
} while (cursor.moveToNext());
}
cursor.close();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
}

I have checked your code and you are setting all values in one simple method, therefore it will not take stateId to fetch districts, So just apply below two method and call first in onCreate method to resolve your issue,
Call Below method in onCreate() method
// In onCreate() method call below method
fillStateData();
public void fillStateData()
{
try {
ArrayList<String> state_array = new ArrayList<String>();
state_array.add("Select State");
Cursor cursor_State = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nCtgId = 6", null);
if (cursor_State.moveToFirst())
{
do {
//assing values
String stateID = cursor_State.getString(0);
String stateName = cursor_State.getString(1);
stateData = stateName;
state_array.add(stateData);
} while (cursor_State.moveToNext());
}
ArrayAdapter my_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, state_array);
spnState.setAdapter(my_Adapter);
cursor_State.close();
spnState.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
state = spnState.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + state + "'", null);
if (cursor.moveToFirst()) {
stateCodeId = cursor.getString(0);
}
cursor.close();
fillDistrictData(stateCodeId);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
public void fillDistrictData(String stateCodeId)
{
try {
ArrayList<String> district_array = new ArrayList<String>();
district_array.add("Select District");
Cursor cursor_District = db.rawQuery("SELECT nSerialNo as _id,cCodeName FROM CodeMaster where nParentSerialNo = '"+stateCodeId+"'", null);
if (cursor_District.moveToFirst()) {
do {
//assing values
String districtID = cursor_District.getString(0);
String districtName = cursor_District.getString(1);
districtData = districtName;
district_array.add(districtData);
} while (cursor_District.moveToNext());
}
ArrayAdapter district_Adapter = new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, district_array);
spnDistrict.setAdapter(district_Adapter);
cursor_District.close();
spnDistrict.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
district = spnDistrict.getSelectedItem().toString();
Cursor cursor = db.rawQuery("SELECT nSerialNo FROM CodeMaster where cCodeName = '" + district + "'", null);
if (cursor.moveToFirst()) {
do {
//assing values
districtCodeId = cursor.getString(0);
} while (cursor.moveToNext());
}
cursor.close();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
} catch (Exception e) {
e.printStackTrace();
}
}

transfer checked items in list-view to another list-view on button click in android

I have a listview with data using customAdapter.class now what i want is that to transfer checked items in listview to secondActivity on button click...
btest.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SparseBooleanArray checked = listView.getCheckedItemPositions();
ArrayList<Model> mylist = new ArrayList<Model>();
for (int i = 0; i < checked.size(); i++) {
int position = checked.keyAt(i);
if (checked.valueAt(i))
// listView = new ArrayList<Model>();
mylist.add(String.valueOf(adapter.getItem(position)));
}
String[] output = new String[mylist.size()];
for (int i = 0; i < mylist.size(); i++) {
output[i] = (mylist.get(i));
}
Intent intent = new Intent(getApplicationContext(), ResultActivity.class);
Bundle b = new Bundle();
b.putStringArray("selectedItems", output);
// b.putStringArrayList("SelectedItems: ",list);
// b.putString("selectedItems", String.valueOf(output));
intent.putExtras(b);
startActivity(intent);*/
}
});
and this is the second activity where i am getting that data in another listview
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result);
Bundle b = getIntent().getExtras();
String[] result = b.getStringArray("selectedItems");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, result);
lv.setAdapter(adapter);
}

The method you followed to send custom list to another activity will not work. In order to transfer your custom list between activities you need to create Parcelable List and send it through intent.
Android Intents does not support custom list.
Custom list can be passed in two ways, Serialization and Parcelable.
But Parcelable is more Efficient and Simple to implement.
Refer this link to send custom list between activities through Parcelable
This link will give you much better idea to implement Parcelable.
Updated Code: Change your Model Code like below.
public class Model implements Parcelable{
private String name;
private int selected;
public Model(String name){
this.name = name;
selected = 0;
}
public String getName(){
return name;
}
public int isSelected(){
return selected;
}
public void setSelected(boolean selected){
this.selected = selected;
}
#Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
/**
* Storing the Student data to Parcel object
**/
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
dest.writeInt(selected);
}
private Model (Parcel in){
this.name = in.readString();
this.selected = in.readInt();
}
public static final Parcelable.Creator<Model> CREATOR = new Parcelable.Creator<Model>() {
#Override
public Student createFromParcel(Parcel source) {
return new Student(source);
}
#Override
public Model[] newArray(int size) {
return new Model[size];
}
};
}
Then in the MainActivity do this..
Intent next = new Intent(MainActivity , ResultActivity.class);
next.putParcelableArrayListExtra("model_data", (ArrayList<? extends Parcelable>) selectedItems);
startActivity(next);
In the ResultActivity do this.
ArrayList<Model> his = getIntent().getParcelableArrayListExtra("model_data");
Try the above code..
Good Luck..!!

i solve by saving checked items from listview to sqlite on button click. another button to open new activity and call selected items sqlite this way...
oncheckchange add and remove items in an arraylist and call this in onbutton click like this way...
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder view = null;
Support support = (Support) this.getItem(position);
if (convertView == null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.view_items, null);
view = new ViewHolder();
view.tvInfo = (TextView) convertView.findViewById(R.id.tvInfo);
view.cb = (CheckBox) convertView.findViewById(R.id.cb);
convertView.setTag(view);
view.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
CheckBox cb = (CheckBox) buttonView;
Support support = (Support) cb.getTag();
support.setSelected(cb.isChecked());
if (isChecked){
selList.add(support.status);
selID.add(support.id);
selType.add(support.type);
// Toast.makeText(CustomAdapter.this, "Clicked on Checkbox: " + cb.getText() + " is " + cb.isChecked(), Toast.LENGTH_LONG).show();
}else {
selList.remove(support.status);
selID.remove(support.id);
selType.remove(support.type);
}
}
});
}else{
view = (ViewHolder) convertView.getTag();
view.cb = view.getCb();
view.tvInfo = view.getTvInfo();
}
view.cb.setTag(support);
support = list.get(position);
String id = support.getId();
String status = support.getStatus();
String type = support.getType();
view.cb.setChecked(support.isSelected());
// view.tvInfo.setText(id + "," + status + "," + type);
view.tvInfo.setText(status);
return convertView;
}
this is button coding to add to db
btest.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
handler.addSelected(adapter.selList, adapter.selID, adapter.selType);
and this is how to insert to sqlite..
public void addSelected(ArrayList<String> selList, ArrayList<String> selID, ArrayList<String> selType) {
int size = selID.size();
SQLiteDatabase db = getWritableDatabase();
try{
for (int i = 0; i < size ; i++){
ContentValues cv = new ContentValues();
// cv.put(KEY_ID, selID.get(i).toString());
cv.put(KEY_ID, selID.get(i));
cv.put(KEY_STATUS, selList.get(i));
cv.put(KEY_TYPE, selType.get(i));
Log.d("Added ",""+ cv);
db.insertOrThrow(TABLE_SELECTED, null, cv);
}
db.close();
}catch (Exception e){
Log.e("Problem", e + " ");
}
}
and get back from db like this
public ArrayList<String> getSelected() {
SQLiteDatabase db = this.getReadableDatabase();
ArrayList<String> result = null;
try{
result = new ArrayList<String>();
// String query = "SELECT * FROM " + TABLE_SELECTED;
String query = "SELECT " + KEY_ID + " FROM " + TABLE_SELECTED;
Cursor c = db.rawQuery(query, null);
if (!c.isLast()){
if (c.moveToFirst()){
do{
String sel_name = c.getString(c.getColumnIndex("_id"));
result.add(sel_name);
Log.d("Added ", sel_name);
}while (c.moveToNext());
}
}
c.close();
db.close();
}catch (Exception e){
Log.e("Nothing is to show", e + " ");
}
return result;
}

Need to get the Id of a selected item in a spinner from sqlite

im a newbie to android and i have this problem here hope you guys can help me with this :)
anyways, i want to get the id of a selected item in the spinner from sqlite database so that i can save it to another table later on.
here's my code:
in my DB.java :
public List<String> getSemesterList() {
List<String> List = new ArrayList<String>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_SEMESTER;
Cursor c = ourDatabase.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (c.moveToFirst()) {
do {
List.add((c.getString(1)));
} while (c.moveToNext());
}
return List;
}
public String getSemesterId() {
String[] columns = new String[] { KEY_SEMESTER_ID, KEY_SEMESTER };
Cursor c = ourDatabase.query(TABLE_SEMESTER, columns, null, null, null, null, null, null);
int id = c.getColumnIndex(KEY_SEMESTER_ID);
String semId = "";
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
semId = semId + c.getInt(id) + " "
+ "\n";
}
return semId ;
}
and in my createSYAttended.class
// TODO Auto-generated method stub
DB entry = new DB(this);
entry.open();
final List<String> all = entry.getSemesterList();
if(all.size()>0) // check if list contains items.
{
sqlSem = (Spinner) findViewById(R.id.sprSemester);
arrayAdapter = new ArrayAdapter<String>(CreateSyAttended.this,android.R.layout.simple_spinner_dropdown_item, all);
arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sqlSem.setAdapter(arrayAdapter);
entry.close();
sqlSem.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
});
} }

use a mapping for the index of your List<String> all = entry.getSemesterList(); to the spinner item
so when you get below callback
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
you can then use the position you get in the callback to map to the item in the semesterList all

populating spinner based on the previous spinner selection in android

Am not familiar with android development,and i came across a situation to cascade a dropdown based on the first spinner selection.i.e.,consider for an example in 1st spinner all states data are loaded from web service using db helper class while selecting the state name in the 1st spinner i need to populate the 2nd spinner based on the 1st spinner selected item's id(stateid not that spinner's selected item id) from db which means i need to select the stateid from the selected state and want to filter the districts based on the states.
State table creation:
CREATE TABLE States( StateID INTEGER , StateName VARCHAR) District table creation: CREATE TABLE Branches(_ID INTEGER PRIMAY KEY,DistrictName VARCHAR,StateID INTEGER)
In this I have used to load data for states by using arraylist and on spinner1.setOnItemSelectedListener function loaded the district values but the values are loading as per the position of the items in the states spinner instead of that i need to filter based on the stateid in the branch table.
This is the code for getting all states:
public ArrayList<HashMap<String, String>> getStatesData() {
ArrayList aList = new ArrayList();
try {
Log.e("getStatesData", "Started");
String selectQuery = "SELECT * FROM States";
SQLiteDatabase database = this.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
HashMap<String, String> map = new HashMap<String, String>();
map.put("StateID",
cursor.getString(cursor.getColumnIndex("StateID")));
map.put("StateName", cursor.getString(cursor
.getColumnIndex("StateName")));
aList.add(map);
} while (cursor.moveToNext());
}
cursor.close();
return aList;
} catch (Exception e) {
e.printStackTrace();
Log.e("getStatesData", "Ended");
return aList;
}
}
spinner1.setonitemselectedlistner event:
spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapt, View v,
int pos, long id) {
// TODO Auto-generated method stub
long spinstate=spinner_state.getSelectedItemId();
branch_values=sDBController.getStateselectidData(spinstate);
branch_name_ary.clear();
for (int i = 0; i < branch_values.size(); i++) {
String name=branch_values.get(i).get("DistrictName");
String id=branch_values.get(i).get("StateID");
branch_name_ary.add(name);
Log.e("branchesbystates", branch_name_ary.toString());
}
ArrayAdapter<String> spinnerArrayAdapter1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, branch_name_ary);
spinnerArrayAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner_district.setAdapter(spinnerArrayAdapter1);
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
Please suggest some solution to get the districts based on the stateid which may help to get an idea solve the issue.
Thanks in advance.

if i were you, i would create a State like so
public class State {
private String id;
private String name;
public State(String id, String name) {
this.id = id;
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Override
public String toString() {
return name;
}
}
and the getStatesDate method would be like this:
public List<State> getStatesData()
{
List<State> states = new LinkedList<State>();
try {
Log.e("getStatesData", "Started");
String selectQuery = "SELECT * FROM States";
SQLiteDatabase database = this.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
HashMap<String, String> map = new HashMap<String, String>();
String stateId = cursor.getString(cursor.getColumnIndex("StateID"));
String stateName = cursor.getString(cursor.getColumnIndex("StateName"));
states.add(new State(stateId, stateName));
} while (cursor.moveToNext());
}
cursor.close();
} catch (Exception e) {
e.printStackTrace();
Log.e("getStatesData", "Ended");
}
return states;
}
and the spinner1 onClicklistener will also be like this:
spinner1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
State state = (State) spinner1.getSelectedItem();
String stateId = state.getId();
String stateName = state.getName();
//you are very assured that the id matches the name selected and you can proceed from there
}
});
I hope it helps. Cheers

Best option is yo use "switch case" like this:
int spinner = 0;
String bereichlink ="";
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
int spinnerId = getView(position, v, parent).getId();
searchstring = sstr.getText().toString();
switch (parent.getId()) {
case R.id.REditText:
if (position > 0) {
spinner = position;
Link = links[position];
spinner2 = (Spinner) findViewById(R.id.sp_bereich);
adapter2 = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_item, Constants.bereich[position - 1]);
spinner2.setAdapter(adapter2);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
new FetchFeedTask().execute((Void) null);
spinner2.setSelection(0);
}
break;
case R.id.sp_bereich:
if (position >= 0) {
bereichlink = Constants.bereich[spinner-1][position];
new FetchFeedTask().execute((Void) null);
}
bereichlink = "";
break;
}
if ((spinner > 0) && (position > 0)) {
...
}
with "Links" and "Bereich" as const enum typs arrays