Develop Reference

Rendering EditText of SortableTableView

I'am using SortableTableView to show sqlite table in android application. I want to add edit-button that are outside tables. How to enable editing mode for SortableTableView when edit-button is pressed?
I tried the code like this but it does not work.
/* EditDataAdapter.java */
// THIS IS NOT WORKED ???
public void setRenderEditable() {
int row = 0;
LinearLayout rowView = new LinearLayout(_tableView.getContext());
for (int col = 0; col < _tableView.getColumnModel().getColumnCount(); col++) {
View cellView = getLongPressCellView(row, col, rowView);
int cellWidth = _tableView.getColumnModel().getColumnWidth(col, _tableView.getWidth());
LinearLayout.LayoutParams cellLayoutParams = new LinearLayout.LayoutParams(cellWidth, LinearLayout.LayoutParams.WRAP_CONTENT);
cellView.setLayoutParams(cellLayoutParams);
_tableView.addView(cellView);
_tableView.invalidate();
}
}
/* EditFragment.java */
// Calling EditDataAdapter
ServerSortableTableView tableView = (ServerSortableTableView) rootView.findViewById(R.id.server_table);
if (tableView != null) {
EditDataAdapter editDataAdapter = new EditDataAdapter(getContext(), ServerDataFactory.readServerList(), tableView);
tableView.setDataAdapter(editDataAdapter);
}
Button editButton = (Button) rootView.findViewById(R.id.edit_button);
if (editButton != null) {
editButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (editButton.getText().toString().equals("edit")) {
editDataAdapter.setRenderEditable(); // This is not worked
editButton.setText("save");
} else {
editButton.setText("edit");
}
}
});
}

I found a solution to my problem. I will share here, it may be useful to others.
public void setRenderEditable() {
_tableView.setMinimumWidth(900);
_tableView.removeViewAt(1);
int row = 0;
LinearLayout rowView = new LinearLayout(_tableView.getContext());
for (int col = 0; col < _tableView.getColumnModel().getColumnCount(); col++) {
View cellView = getLongPressCellView(row, col, rowView);
int cellWidth = _tableView.getColumnModel().getColumnWidth(col, _tableView.getWidth());
LinearLayout.LayoutParams cellLayoutParams = new LinearLayout.LayoutParams(cellWidth, LinearLayout.LayoutParams.WRAP_CONTENT);
cellView.setLayoutParams(cellLayoutParams);
rowView.addView(cellView);
}
_tableView.addView(rowView, 1);
}

Android: Save the activity state after a screen rotation

we are working on project in order to create an application to help autits to communicate.
In fact, after moving the ImageViews, all of them are getting back in place after my tablet's rotation.
We tried a lot of things and we finally have made this code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.repas);
area1 = (LinearLayout) findViewById(R.id.area1);
area2 = (LinearLayout) findViewById(R.id.area2);
TypedArray arrayResources = getResources().obtainTypedArray(
R.array.resicon);
if( savedInstanceState != null ) {
int count_item = savedInstanceState.getInt("number_of_item");
int tab_item[] = new int[count_item];
for (int i = 0; i < count_item; i++) {
tab_item[i]=savedInstanceState.getInt("Sauvegarde_repas" +i);
}
for (int i = 0; i < arrayResources.length(); i++) {
ImageView imageView = new ImageView(this);
imageView.setImageDrawable(arrayResources.getDrawable(i));
imageView.setOnTouchListener(myOnTouchListener);
imageView.setId(i);
if (check(tab_item,i)){
area1.addView(imageView);
}
else{
area2.addView(imageView);
}
}
}
else {
for (int i = 0; i < arrayResources.length(); i++) {
ImageView imageView = new ImageView(this);
imageView.setImageDrawable(arrayResources.getDrawable(i));
imageView.setOnTouchListener(myOnTouchListener);
imageView.setId(i);
area2.addView(imageView);
}
arrayResources.recycle();
}
area1.setOnDragListener(myOnDragListener);
area2.setOnDragListener(myOnDragListener);
}
#Override
public void onSaveInstanceState(Bundle outState)
{
int count = area1.getChildCount();
View v = null;
outState.putInt("number_of_item", count);
for(int i=0; i<count; i++) {
v = area1.getChildAt(i);
outState.putInt("Sauvegarde_repas" + i, v.getId());
}
super.onSaveInstanceState(outState);
}
Here are my interrogations:
When I set an id, it's just "i", a very simple number. It doesn't seem very unique like a string "R.id.String_here" (even if I know that is converted in Integer), so how can I be sure to do a unique ID?
Do I have to save, one by one, the child of my layout? It's not possible to save the whole layout?
Do you have any advice to improve my code? (Because it looks dirty, isn't it ?)
Thank you very much for your help !

check all or uncheck all dynamically created checkboxes in android

1.here all my code.
2.for create dynamic checkbox for check or uncheck all checkboxes
{ final String[][] itemContainer = new String[30][7];
TableLayout tblItemDetail;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_item_code_release);
tblItemDetail = (TableLayout)findViewById(R.id.tblItemDetail);
try {
sqlItem = "";
sqlItem = "SELECT * from itm_mst";
rs = objDbConnect.getResultSet(sqlItem);
if (rs.next()) {
int i1 = 1;
do {
itemContainer[itemCount][0]=Integer.toString(i1++);
itemContainer[itemCount][6]="N"; //checkbox value
itemCount++;
} while (rs.next());
tblItemDetail.removeAllViews();
if (itemCount > 0) {
CheckBox tvchkall = new CheckBox(ItemCodeRelease.this); //header row checkbox for ckeck or uncheck all checkbox
tvchkall.setGravity(Gravity.CENTER);
tvchkall.setPadding(20, 0, 20, 0);
tvchkall.setText("Y");
headerRow1.addView(tvchkall);
tvchkall.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(buttonView.isChecked())
{
for(int a = 0 ; a < itemContainer.length ; a++)
{
for(int b = 0 ; b < itemContainer[a].length ; b++)
{
CheckBox chkb = (CheckBox)tblItemDetail.findViewById(a);
if ( chkb == null )
continue;
chkb.setChecked(true);
Log.i("Checkbox serrch","checked "+chkb.getText()+"ID +chkb.getId());
if(a == chkb.getId())
{
itemContainer[a][6] = "Y";
}
else
{
Log.i("Checkbox serrch","unchecked"+chkb.getText()+"ID "+chkb.getId());
itemContainer[a][6] = "N";
}}}}
});
tblItemDetail.addView(headerRow1);
int alternateRow1 = 0;
for (i = 0; i < itemCount; i++) {
TableRow bodyRow1 = new TableRow(ItemCodeRelease.this);
if (alternateRow1 % 2 == 0) {
bodyRow1.setBackgroundResource(R.color.statusalternateRow);
}
else {
bodyRow1.setBackgroundResource(R.color.statusRow);
}
final CheckBox cb1 = new CheckBox(ItemCodeRelease.this); //body row of checkbox
cb1.setId(i);
cb1.setGravity(Gravity.CENTER);
cb1.setPadding(20, 0, 20, 0);
bodyRow1.addView(cb1);
cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
for(int a = 0 ; a < itemContainer.length ; a++)
{
for(int b = 0 ; b < itemContainer[a].length ; b++)
{
if(buttonView.isChecked())
{
Log.i("Checkbox serrch","checked "+buttonView.getText()+"ID "+buttonView.getId());
if(a == buttonView.getId())
{
itemContainer[a][6] = "Y";
continue;
}}
else
{
itemContainer[a][6] = "N";
}}}}
});
bodyRow1.addView(tvBodySRNo1);
tblItemDetail.addView(bodyRow1);
alternateRow1++;
}}}
} catch (Exception e) { e.printStackTrace(); }}

Update [26-01-2016] : You can follow this to Check/UnCheck Dynamically created CheckBoxes.
Inside onCreate(Bundle bundle) { ... } add this :
Few Notes :
You need to give the Base Layout an ID if you use:
setContentView(R.layout.new_layout);
That is, when you set ContentView using layout xml.
You may need to create dummy ids in ids.xml in values folder for usability.
Please keep in mind that you can apply a similar logic for Layout created dynamically instead of using layout xml.
Please keep in mind that you can use similar logic for other Compound Buttons instead of CheckBox.
//Get Base Layout
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.base_layout);
//Create new CheckBox
CheckBox mainCheckBox = new CheckBox(this);
//Create a new ids.xml in values folder and add dummy id there. Than use that dummy id for dynamically created views
mainCheckBox.setId(R.id.main_cb);
//Give a name to it
mainCheckBox.setText(R.string.mainCB);
//Add it to Base layout
linearLayout.addView(mainCheckBox, 0);
//Create other CheckBoxes...
CheckBox[] checkBoxes = new CheckBox[5];
for (int i = 0; i < 5; i++) {
checkBoxes[i] = new CheckBox(this);
checkBoxes[i].setText(String.format(Locale.getDefault(), "Child CheckBox %d", i + 1));
checkBoxes[i].setId(i+101);
linearLayout.addView(checkBoxes[i], i+1);
}
//Creating each checkbox individually:
CheckBox checkBox = new CheckBox(this);
checkBox.setText("Child CheckBox 6");
//Either add an integer value
checkBox.setId(106);
/*
* Or else use a dummy id
* checkBox.setId(R.id.child_cb);
*/
linearLayout.addView(checkBox, 6);
//Set listener to main CheckBox
mainCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//Create an array of integer type to store all ids of child CBs
int[] ids = new int[] { 101, 102, 103, 104, 105, 106 };
/*
* You can also do
* int[] ids = new int[] { 101, 102, 103, 104, 105, R.id.child_cb };
*/
if(isChecked) {
Toast.makeText(getBaseContext(), "Checked", Toast.LENGTH_SHORT).show();
checkChildCBs(ids);
} else {
Toast.makeText(getBaseContext(), "Unchecked", Toast.LENGTH_SHORT).show();
unCheckChildCBs(ids);
}
}
});
Method to check all CheckBoxes
private void checkChildCBs(int[] ids) {
//Create CheckBox array of same size as that of ids
CheckBox[] checkBoxes = new CheckBox[ids.length];
//Run loop to check them
for (int i = 0; i < ids.length; i++) {
checkBoxes[i] = (CheckBox) findViewById(ids[i]);
checkBoxes[i].setChecked(true);
}
}
Method to unCheck all CheckBoxes
private void unCheckChildCBs(int[] ids) {
//Create CheckBox array of same size as that of ids
CheckBox[] checkBoxes = new CheckBox[ids.length];
//Run loop to unCheck them
for (int i = 0; i < ids.length; i++) {
checkBoxes[i] = (CheckBox) findViewById(ids[i]);
checkBoxes[i].setChecked(false);
}
}
/res/values/ids.xml :
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item type="id" name="main_cb" />
<item type="id" name="child_cb" />
</resources>
Update : You can follow the below code to enable/disable Dynamically created CheckBoxPreferences.
Create a new file named preferences.xml in /res/xml/ directory :
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen
xmlns:android="http://schemas.android.com/apk/res/android"
android:key="pref_screen">
</PreferenceScreen>
Than in your PreferenceActivity in onCreate() :
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add preference xml file from /res/xml/
addPreferencesFromResource(R.xml.preferences);
}
Now we will create CheckBoxPreference dynamically :
// Get PreferenceScreen using the key as stated in preferences.xml
PreferenceScreen prefScreen = (PreferenceScreen) findPreference("pref_screen");
// Now create a CheckBoxPreference array. The size of the array will be the number of required CheckBoxPreferences.
CheckBoxPreference[] cbPrefs = new CheckBoxPreference[5]; // You can set any number you want. This will allow you to create 5 CheckBoxPreferences.
// Run loop to create CheckBoxPreferences and add them to the PreferenceScreen.
for (int i = 0; i < cbPrefs.length; i++) {
cbPrefs[i] = new CheckBoxPreference(getActivity());
cbPrefs[i].setTitle("Dynamically created multiple Pref " + (i+1));
cbPrefs[i].setKey("multiple_dynamic_pref_key_" + (i+1));
prefScreen.addPreference(cbPrefs[i]); // Adds the newly created CheckBoxPreference to the PreferenceScreen
}
/*
IF you want, you can also create new CheckBoxPreference individually like this :
cbPrefs[0] = new CheckBoxPreference(getActivity());
cbPrefs[0].setTitle("My Preference");
cbPrefs[0].setKey("my_pref_key");
prefScreen.addPreference(cbPrefs[0]);
cbPrefs[1] = new CheckBoxPreference(getActivity());
cbPrefs[1].setTitle("Some Name");
cbPrefs[1].setKey("some_pref_key");
prefScreen.addPreference(cbPrefs[1]);
and so on and so forth...
*/
// Now create and add a Preference to the PreferenceScreen
Preference preference = new Preference(getActivity());
preference.setTitle("Preference");
prefScreen.addPreference(preference);
// Now set onPreferenceClickListener to newly created preference.
preference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference preference) {
String[] prefKeys = new String[] {"multiple_dynamic_pref_key_1", "multiple_dynamic_pref_key_2",
"multiple_dynamic_pref_key_3", "multiple_dynamic_pref_key_4",
"multiple_dynamic_pref_key_5"};
changePrefsState(prefKeys, cbPrefs);
return false;
}
});
Finally your onCreate() will look like this :
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Add preference xml file from /res/xml/
addPreferencesFromResource(R.xml.preferences);
// Get PreferenceScreen using the key as stated in preferences.xml
PreferenceScreen prefScreen = (PreferenceScreen) findPreference("pref_screen");
// Now create a CheckBoxPreference array. The size of the array will be the number of required CheckBoxPreferences.
CheckBoxPreference[] cbPrefs = new CheckBoxPreference[5]; // You can set any number you want. This will allow you to create 5 CheckBoxPreferences.
// Run loop to create CheckBoxPreferences and add them to the PreferenceScreen.
for (int i = 0; i < cbPrefs.length; i++) {
cbPrefs[i] = new CheckBoxPreference(getActivity());
cbPrefs[i].setTitle("Dynamically created multiple Pref " + (i+1));
cbPrefs[i].setKey("multiple_dynamic_pref_key_" + (i+1));
prefScreen.addPreference(cbPrefs[i]); // Adds the newly created CheckBoxPreference to the PreferenceScreen
}
// Now create and add a Preference to the PreferenceScreen
Preference preference = new Preference(getActivity());
preference.setTitle("Preference");
PreferenceScreen.addPreference(preference);
// Now set onPreferenceClickListener to newly created preference.
preference.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference preference) {
String[] prefKeys = new String[] {"multiple_dynamic_pref_key_1", "multiple_dynamic_pref_key_2",
"multiple_dynamic_pref_key_3", "multiple_dynamic_pref_key_4",
"multiple_dynamic_pref_key_5"};
changePrefsState(prefKeys, cbPrefs);
return false;
}
});
}
// This function is called when you click on preference to check/uncheck CheckBoxPrefs.
private void changePrefsState(String[] prefKeys, CheckBoxPreference[] checkBoxPreferences) {
try {
for (int i = 0; i < prefKeys.length; i++) {
checkBoxPreferences[i] = (CheckBoxPreference) findPreference(prefKeys[i]);
// Check if CheckBozPreference is Checked. If yes than unCheck it else Check it
if (checkBoxPreferences[i].isChecked())
checkBoxPreferences[i].setChecked(false);
else
checkBoxPreferences[i].setChecked(true);
}
} catch(Exception e) {
Toast.makeText(getActivity().getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
Old :
private void someFunction() {
String[] prefKeys = new String[] {"pref_key_1", "pref_key_2", "pref_key_3", "pref_key_4", "pref_key_5"};
CheckBoxPreference[] cbPrefs = new CheckBoxPreference[prefKeys.length];
changePrefsState(prefKeys, cbPrefs);
}
private void changePrefsState(String[] prefKeys, CheckBoxPreference[] checkBoxPreferences) {
try {
for (int i = 0; i < prefKeys.length; i++) {
checkBoxPreferences[i] = (CheckBoxPreference) findPreference(prefKeys[i]);
// Check if CheckBozPreference is Checked. If yes than unCheck it else Check it
if (checkBoxPreferences[i].isChecked())
checkBoxPreferences[i].setChecked(false);
else
checkBoxPreferences[i].setChecked(true);
}
} catch(Exception e) {
Toast.makeText(getActivity().getBaseContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
The above example works for both Dynamically created preferences and XML defined preferences.
You just need to pass the keys and pref type.
You can make different changePrefsState(arg1, arg2) { ... } for different Preference types.

main checkbox for check all checkbox.
CheckBox tvchkall = new CheckBox(ItemCodeRelease.this);
tvchkall.setId(101);
tvchkall.setOnClickListener(getOnClickDoSomething(tvchkall));
listner that check all checkbox which is dynamicall creater.
View.OnClickListener getOnClickDoSomething(final CheckBox chk) {
return new View.OnClickListener() {
public void onClick(View v) {
if (chk.getId() == 101) {
if (chk.isChecked()) {
for (int a = 1; a < tblItemDetail.getChildCount(); a++) {
itemContainer[a][6] = "Y";
CheckBox cb1 = (CheckBox) ((TableRow) tblItemDetail.getChildAt(a)).getChildAt(1);
cb1.setChecked(true);
}
} else {
for (int a = 1; a < tblItemDetail.getChildCount(); a++) {
itemContainer[a][6] = "N";
CheckBox cb11 = (CheckBox) ((TableRow) tblItemDetail.getChildAt(a)).getChildAt(1);
}
}
} else {
if (chk.isChecked()) {
for (int a = 0; a < itemContainer.length; a++) {
for (int b = 0; b < itemContainer[a].length; b++) {
if (a == chk.getId()) {
itemContainer[a][6] = "Y";
}
}
}
} else {
for (int a = 0; a < itemContainer.length; a++) {
for (int b = 0; b < itemContainer[a].length; b++) {
if (a == chk.getId()) {
itemContainer[a][6] = "N";
}
}
}
}
}
}
};
}

State of dynamic radio buttons changing on scrolling in a listview Android [duplicate]

This question already has an answer here:
Dynamically generated Radio button changes its position while scrolling
(1 answer)
Closed 7 years ago.
We are working on a project where there is a custom listview with a radio group in each list item . The radio buttons in it are generated dynamically.The issue is that on scrolling the state of the selected radio buttons becomes deselected.The following is the code which we have tried:
The adapter getView() method:
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
option_list = question_list_array.get(position).option_list;
number_of_options = option_list.size();
v_single=convertView;
if (v_single == null)
{
v_single = inflater.inflate(R.layout.single_choice_layout, null);
sh = new SingleHolder();
sh.single_question_name = (TextView) v_single.findViewById(R.id.single_question_name);
sh.single_radiogroup = (RadioGroup) v_single.findViewById(R.id.single_radiogroup);
v_single.setTag(sh);
}
else
{
sh = (SingleHolder) v_single.getTag();
}
sh.single_radiogroup.clearCheck();
sh.single_radiogroup.removeAllViews();
sh.single_question_name.setText(question_list_array.get(position).getQuestion_name());
for (int j = 0; j < number_of_options; j++)
{
RadioButton rb = new RadioButton(context);
rb.setId(Integer.parseInt(option_list.get(j).getOption_id()));
rb.setText(option_list.get(j).getOption_name());
sh.single_radiogroup.addView(rb);
}
sh.single_radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
for (int n = 0; n < group.getChildCount(); n++)
{
RadioButton rb = (RadioButton) group.getChildAt(n);
if (Integer.parseInt(option_list.get(n).getOption_id())== checkedId)
{
k++;
String result = rb.getText().toString();
sr=new SingleResult();
sr.setAns(result);
sr.setQuestion_id(question_list_array.get(k).getQuestion_id());
single_result.add(sr);
Toast.makeText(context, result, Toast.LENGTH_SHORT).show();
return;
}
}
}
});
v_final=v_single;
return v_final;
}
private class SingleHolder
{
TextView single_question_name;
RadioGroup single_radiogroup;
}
EDIT:
this is the single_choice_layout.xml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/single_question_name"
/>
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/single_radiogroup"
android:orientation="vertical"
>
</RadioGroup>
</LinearLayout>

try this code
public View getView(final int position, View convertView, ViewGroup parent) {
//give the corrct class name
QuestionObj rowObject = question_list_array.get(position);
option_list = question_list_array.get(position).option_list;
number_of_options = option_list.size();
v_single = convertView;
SingleHolder sh;
if (v_single == null) {
v_single = inflater.inflate(R.layout.single_choice_layout, null);
sh = new SingleHolder();
sh.single_question_name = (TextView) v_single.findViewById(R.id.single_question_name);
sh.single_radiogroup = (RadioGroup) v_single.findViewById(R.id.single_radiogroup);
v_single.setTag(sh);
} else {
sh = (SingleHolder) v_single.getTag();
}
sh.single_question_name.setText(rowObject.getQuestion_name());
sh.single_radiogroup.clearCheck();
sh.single_radiogroup.removeAllViews();
for (int j = 0; j < number_of_options; j++) {
RadioButton rb = new RadioButton(context);
rb.setId(Integer.parseInt(option_list.get(j).getOption_id()));
rb.setText(option_list.get(j).getOption_name());
sh.single_radiogroup.addView(rb);
}
if (rowObject.getSelectedId() != 0) {
RadioButton radioButton = (RadioButton) sh.single_radiogroup.findViewById(rowObject.getSelectedId());
if (radioButton != null)
radioButton.setChecked(true);
}
sh.single_radiogroup.setTag(rowObject);
sh.single_radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
QuestionObj rowObject = (QuestionObj) group.getTag();
rowObject.setSelectedId(checkedId);
RadioButton radioButton = (RadioButton) group.findViewById(checkedId);
rowObject.setAnswer(radioButton.getText());
}
});
v_final = v_single;
return v_final;
}
private class SingleHolder {
TextView single_question_name;
RadioGroup single_radiogroup;
}
class QuestionObj {
private int selectedId;
public int getSelectedId() {
return selectedId;
}
public void setSelectedId(int selectedId) {
this.selectedId = selectedId;
}
//put this is in those
//other fieldds like questionname, question id,
}

If i am understanding your code correctly. You need to implement this method as well.
check(int id)
Sets the selection to the radio button whose identifier is passed in parameter.

selected check boxes count and passing it to another activity

i have 4 check boxes in 1st activity and i wanna store only those user selected check boxes and have to show in another activity my question is how can i count the user selected checkboxes. please help with me logic
int x = 0;
public void onCheckboxClicked(View view) {
checked = ((CheckBox) view).isChecked();
if (((CheckBox) view).isChecked() == true) {
int i = 0;
while (i != 4) {
x = i + 1;
i++;
}
}
}
On Submit Button
if(x!=0) {
show alert();
and passing check boxes selected count
}

You can run a loop and find the number of CheckBox views and then accordingly get the count of checked CheckBoxes
Ex:
main = (LinearLayout) findViewById(R.id.main);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
count = 0;
int childcount = main.getChildCount();
for (int i=0; i < childcount; i++){
View view = main.getChildAt(i);
if (view instanceof CheckBox) {
if(((CheckBox) view).isChecked())
count++;
}
}
text.setText("count: " + count);
}
});

First put checkboxes in an array:
ArrayList<CheckBox> checkList = new ArrayList<CheckBox>();
you can do it with:
for(int i=0 ; i<4; i++)
{
checkList.add(YOURCHECKBOX) ;
}
than you can check which CB are checked (implement where you want it to save only those which are checked..) with:
for(int i=0 ; i<checkList.size(); i++)
{
if(checkList.get(i).isChecked() == true)
{
YOURCODE
}
}