Develop Reference

Android: Spinner and ListView with the same ArrayList

I'm trying to implement a selection activity for a given list of items. Each item is checkable, so I have an item with a TextView and a CheckBox. I implemented a ListView for displaying all the options and a Spinner for showing only the "Top Ten" choices, as a subset of the same list. For now I'm showing all the items in both ListView and Spinner.
I want for the items in the ListView to update when the user selects an item in the Spinner (Note: The reverse path works fine, as the Spinner grabs the updated ArrayList each time it dropsdown).
I tried to implement setOnItemSelectedListener for my Spinner, and to call notifyOnDataSetChanged() for my ListViewAdapter inside the Listener. But the Listener is only called on collapse and I get a weird (maybe unrelated) warning message.
The onItemSelectedListener for the Spinner only runs when the Spinner gets collapsed. But notifyOnDataSetChanged() seems to ignore the checked status of the items as a change. How can I make the first option run everytime I check an item and have the change get properly received by the ListAdapter?
Here's the Activity.java code:
public class TriageReasonActivity extends BaseActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_triage_reason);
final String[] select_qualification = {
"Select Qualification", "10th / Below", "12th", "Diploma", "UG",
"PG", "Phd"};
Spinner spinner = (Spinner) findViewById(R.id.top_reasons_spinner);
ListView symptoms_list = (ListView) findViewById(R.id.view_list_symptoms);
ArrayList<Symptoms> listVOs = new ArrayList<>();
for (int i = 0; i < select_qualification.length; i++) {
Symptoms reason = new Symptoms();
reason.setTitle(select_qualification[i]);
reason.setSelected(false);
listVOs.add(reason);
}
SymptomsListAdapter mListAdapter = new SymptomsListAdapter(this, 0,
listVOs);
SymptomsSpinnerAdapter mSpinnerAdapter = new SymptomsSpinnerAdapter(this, 0,
listVOs);
symptoms_list.setAdapter(mListAdapter);
spinner.setAdapter(mSpinnerAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
Log.i("Item selected", "but not cahnged");
symptoms_list.invalidateViews();
mListAdapter.notifyDataSetInvalidated();
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
Log.i("Not item selected", "but actually it did");
}
});
}
The SpinnerCustom Adapter code:
public class SymptomsSpinnerAdapter extends ArrayAdapter<Symptoms>{
private Context mContext;
private ArrayList<Symptoms> listState;
private SymptomsSpinnerAdapter myAdapter;
private boolean isFromView = false;
/*#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
//mNotifyOnChange = true;
}*/
public SymptomsSpinnerAdapter(Context context, int resource, List<Symptoms> objects) {
super(context, resource, objects);
this.mContext = context;
this.listState = (ArrayList<Symptoms>) objects;
this.myAdapter = this;
}
#Override
public View getDropDownView(int position, View convertView,
ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.item_reasons, null);
holder = new ViewHolder();
holder.mTextView = (TextView) convertView.findViewById(R.id.text);
holder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTextView.setText(listState.get(position).getTitle());
// To check weather checked event fire from getview() or user input
isFromView = true;
holder.mCheckBox.setChecked(listState.get(position).isSelected());
isFromView = false;
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag();
if (!isFromView) {
listState.get(position).setSelected(isChecked);
}
}
});
return convertView;
}
#Override
public int getCount() {
return listState.size();
}
#Override
public Symptoms getItem(int position) {
if( position < 1 ) {
return null;
}
else {
return listState.get(position-1);
}
}
#Override
public long getItemId(int position) {
return 0;
}
private class ViewHolder {
private TextView mTextView;
private CheckBox mCheckBox;
}
}
Here's the (almost identical) ListAdapter:
public class SymptomsListAdapter extends BaseAdapter implements ListAdapter {
private Context mContext;
private ArrayList<Symptoms> listState;
private boolean isFromView = false;
public SymptomsListAdapter(Context context, int resource, List<Symptoms> objects) {
this.mContext = context;
this.listState = (ArrayList<Symptoms>) objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.item_reasons, null);
holder = new SymptomsListAdapter.ViewHolder();
holder.mTextView = (TextView) convertView.findViewById(R.id.text);
holder.mCheckBox = (CheckBox) convertView.findViewById(R.id.checkbox);
convertView.setTag(holder);
} else {
holder = (SymptomsListAdapter.ViewHolder) convertView.getTag();
}
holder.mTextView.setText(listState.get(position).getTitle());
// To check weather checked event fire from getview() or user input
isFromView = true;
holder.mCheckBox.setChecked(listState.get(position).isSelected());
isFromView = false;
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag();
if (!isFromView) {
listState.get(position).setSelected(isChecked);
}
}
});
return convertView;
}
#Override
public int getCount() {
return listState.size();
}
#Override
public Symptoms getItem(int position) {
if( position < 1 ) {
return null;
}
else {
return listState.get(position-1);
}
}
#Override
public long getItemId(int position) {
return 0;
}
private class ViewHolder {
public TextView mTextView;
public CheckBox mCheckBox;
}
}
And here's the warning I'm getting:
W/art: Before Android 4.1, method int android.support.v7.widget.DropDownListView.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
EDIT: Adding the layouts and the model class in case they may cause an issue:
Activity Layout:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="demo.hb.activity.visit.TriageReasonActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textFontWeight="6dp"
android:textSize="30sp"
android:layout_margin="20dp"
android:textAlignment="center"
android:textColor="#000000"
android:text="What is the reason for your visit?" />
<Spinner
android:id="#+id/top_reasons_spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:drawable/btn_dropdown"
android:spinnerMode="dropdown"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="end">
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/view_list_symptoms"
android:layout_above="#+id/next_btn"
android:layout_alignParentTop="true"/>
</RelativeLayout>
</LinearLayout>
</FrameLayout>
Item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:text="text"
android:textAlignment="gravity" />
<CheckBox
android:id="#+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true" />
</RelativeLayout>
Model Class:
public class Symptoms {
private String title;
private boolean selected;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}

The reason that nothing is changing is because you haven't implemented the method to handle the data set changes. You need to handle how the data is reloaded in your adapter:
public class SymptomsListAdapter extends BaseAdapter implements ListAdapter {
...
public void refreshData(ArrayList<Symptoms> objects){
this.listState = (ArrayList<Symptoms>) objects;
notifyDataSetChanged();
}
...
}
This link does a great job of explaining how the notifyDataSetInvalidated() works (or in your case, why it's not working).

get switch id from a listview that contains list of image label and switch

hi i have a listview that shows a list of installed applications on the device it contains icons and titles and a SwitchCompact i need to get the id of the SwitchCompact of each selected row to execute the code needed
<ImageView
android:id="#+id/app_icon"
android:layout_width="50dp"
android:layout_height="70dp"
android:gravity="center"
android:layout_marginTop="2dp"
android:layout_marginLeft="25dp"
android:contentDescription="#null"
android:scaleType="center"/>
<TextView
android:id="#+id/list_app_name"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_alignTop="#+id/app_icon"
android:layout_marginTop="8dp"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:layout_weight="85.6"
android:gravity="left"
android:paddingRight="10dp"
android:text="test1"
android:textColor="#color/colorPrimary"
android:textSize="20dp"
android:textStyle="bold" />
<android.support.v7.widget.SwitchCompat
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
android:layout_marginTop="10dp"
android:padding="15dp"
android:thumb="#drawable/swithc_thumb"
app:track="#drawable/switch_track"
android:id="#+id/Swtch"/>
i ve tried the usual way to setOnCheckedChangeListener but it returns null the default id of the switchcompact is not working for me in this case.
here is my adapter class
public class AppAdapter extends BaseAdapter {
private LayoutInflater layoutInflater;
private List<AppList> appInList;
public AppAdapter(Context context, List<AppList> customizedListView) {
layoutInflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
appInList = customizedListView;
}
#Override
public int getCount() {
return appInList.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder listViewHolder;
if(convertView == null){
listViewHolder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.app_item_layout, parent, false);
listViewHolder.appNameText = (TextView)convertView.findViewById(R.id.list_app_name);
listViewHolder.appIcon = (ImageView)convertView.findViewById(R.id.app_icon);
convertView.setTag(listViewHolder);
}
else{
listViewHolder = (ViewHolder)convertView.getTag();
}
listViewHolder.appNameText.setText(appInList.get(position).getName());
listViewHolder.appIcon.setImageDrawable(appInList.get(position).getIcon());
return convertView;
}
}
static class ViewHolder{
TextView appNameText;
ImageView appIcon;
}
public class AppList {
private String name;
Drawable icon;
public AppList(String name, Drawable icon) {
this.name = name;
this.icon = icon;
}
public String getName() {
return name;
}
public Drawable getIcon() {
return icon;
}
}

I just added switchCompat to your viewHolder so you can use your switchCompat
public class AppAdapter extends BaseAdapter {
private LayoutInflater layoutInflater;
private List<AppList> appInList;
public AppAdapter(Context context, List<AppList> customizedListView) {
layoutInflater =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
appInList = customizedListView;
}
#Override
public int getCount() {
return appInList.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder listViewHolder;
if(convertView == null){
listViewHolder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.app_item_layout, parent, false);
listViewHolder.appNameText = (TextView)convertView.findViewById(R.id.list_app_name);
listViewHolder.appIcon = (ImageView)convertView.findViewById(R.id.app_icon);
listViewHolder.appSwitch = (SwitchCompat) convertView.findViewById(R.id.Swtch); //added switchCompat here.
convertView.setTag(listViewHolder);
}
else{
listViewHolder = (ViewHolder)convertView.getTag();
}
listViewHolder.appNameText.setText(appInList.get(position).getName());
listViewHolder.appIcon.setImageDrawable(appInList.get(position).getIcon());
/* you can now use your appSwitch here.
listViewHolder.appSwitch
*/
return convertView;
}
}
static class ViewHolder {
TextView appNameText;
ImageView appIcon;
SwitchCompat appSwitch; // added switch compat to your viewHolder.
}

How do I add a custom onClicklistener for my spinner with checkboxes

I've been trying to implement a multi-select spinner on my own. So the problem is I'm able to select the checkboxes but when I close and open the spinner again, the selected checkboxes get deselected. So I thought I would implement my own itemclick listener to the spinner and use the positions to check the checkboxes. Now, my spinner is not dropping down.
Here's the code for the main activity.
public class MyProfileActivity extends Activity implements
View.OnClickListener, SpinnerMultiSelectAdapter.OnListItemClickListener{
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
lang_spinner_profile = findViewById(R.id.lang_spinner_profile);
ArrayList<String> options = new ArrayList<>();
options.add("English");
options.add("Japanese");
options.add("Chinese");
options.add("Korean");
lang_spinner_profile.setSelection(0);
final String[] languages = {
"Select Language", "English","Chinese","Japanese","Korean"};
for (int j = 0; j < languages.length; j++) {
StateVO stateVO= new StateVO();
stateVO.setTitle(languages[j]);
stateVO.setSelected(false);
listVOs.add(stateVO);
}
Log.d("Called","Called");
myAdapter = new SpinnerMultiSelectAdapter(MyProfileActivity.this, 0,
listVOs, this);
lang_spinner_profile.setAdapter(myAdapter);
}
#Override
public void onListItemClick(int position) {
Toast.makeText(this, "Clicked at: "+position, Toast.LENGTH_SHORT).show();
}
}
This is my custom pojo class for the spinner.
public class StateVO {
private String title;
private boolean selected;
private String selectedItem;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}
This is the spinner custom layout.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="text"
android:textAlignment="gravity" />
<CheckBox
android:id="#+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true" />
</RelativeLayout>
And finally, this is my custom adapter.
public class SpinnerMultiSelectAdapter extends ArrayAdapter<StateVO> {
private Context mContext;
static private ArrayList<StateVO> listState;
private SpinnerMultiSelectAdapter myAdapter;
private boolean isFromView = false;
List<String> selected = new ArrayList<>();
static int i=0;
List<Integer> checked= new ArrayList<>();
View itemView;
int getPosition;
private OnListItemClickListener onListItemClickListener;
public SpinnerMultiSelectAdapter(Context context, int resource, List<StateVO> objects, OnListItemClickListener onListItemClickListener) {
super(context, resource, objects);
this.mContext = context;
this.listState = (ArrayList<StateVO>) objects;
this.myAdapter = this;
this.onListItemClickListener = onListItemClickListener;
}
#Override
public View getDropDownView(int position, View convertView,
ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.spinner_item, null);
itemView = convertView;
holder = new ViewHolder();
holder.mTextView = (TextView) convertView
.findViewById(R.id.text);
holder.mCheckBox = (CheckBox) convertView
.findViewById(R.id.checkbox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mTextView.setText(listState.get(position).getTitle());
// To check weather checked event fire from getview() or user input
isFromView = true;
holder.mCheckBox.setChecked(listState.get(position).isSelected());
isFromView = false;
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
selected.clear();
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
getPosition = (Integer) buttonView.getTag();
holder.mCheckBox.setSelected(true);
//notifyDataSetChanged();
}
});
return convertView;
}
private class ViewHolder implements View.OnClickListener {
private TextView mTextView;
private CheckBox mCheckBox;
public ViewHolder(){
itemView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
onListItemClickListener.onListItemClick(getPosition);
}
}
public interface OnListItemClickListener {
public void onListItemClick(int position);
}
}
Any help is appreciated. Thank you.

Your adapter has few mistakes here is how it should be;
public class SpinnerMultiSelectAdapter extends ArrayAdapter<StateVO> {
private Context mContext;
private ArrayList<StateVO> listState;
private boolean isFromView = false;
List<String> selected = new ArrayList<>();
List<Integer> checked = new ArrayList<>();
private OnListItemClickListener onListItemClickListener;
public SpinnerMultiSelectAdapter(Context context, int resource, List<StateVO> objects, OnListItemClickListener onListItemClickListener) {
super(context, resource, objects);
this.mContext = context;
this.listState = (ArrayList<StateVO>) objects;
this.onListItemClickListener = onListItemClickListener;
}
#Override
public View getDropDownView(int position, View convertView,
ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(mContext);
convertView = layoutInflator.inflate(R.layout.spinner_item, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final String str = listState.get(position).getTitle();
holder.mTextView.setText(str);
if ((position == 0)) {
holder.mCheckBox.setVisibility(View.INVISIBLE);
} else {
holder.mCheckBox.setVisibility(View.VISIBLE);
}
holder.mCheckBox.setTag(position);
holder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
listState.get(position).setSelected(isChecked);
}
});
return convertView;
}
private class ViewHolder implements View.OnClickListener {
private TextView mTextView;
private CheckBox mCheckBox;
public ViewHolder(View convertView) {
mTextView = (TextView) convertView
.findViewById(R.id.text);
mCheckBox = (CheckBox) convertView
.findViewById(R.id.checkbox);
convertView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
/*onListItemClickListener.onListItemClick(getPosition);*/
}
}
public interface OnListItemClickListener {
public void onListItemClick(int position);
}
}

Android custom ArrayAdapter with custom object

I am new for Android development.
I was trying to implement a custom ArrayAdapter to accept custom object in Android Studio.
I have referenced the source code from some tutorial, but my screen output was improper that the custom object only fill in the TextView which link with the textViewResourceId of ArrayAdapter , but not the custom object's properties fill in all EditText in the layout appropriately.
I tried to remove textViewResourceId parameter in the constructor of ArrayAdapter to fix the problem, but Android Studio returned error - You must supply a resource ID for a TextView
I want the properties of custom object fill in all EditText and no error message be returned, can anyone give me a hint?
Here is my layout:
row_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/row_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"/>
<EditText
android:id="#+id/row_no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_margin="1dp"
android:layout_gravity="center_horizontal"
android:background="#color/colorWhite"/>
<EditText
android:id="#+id/row_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_margin="1dp"
android:layout_gravity="center_horizontal"
android:background="#color/colorWhite"/>
</LinearLayout>
Here is my custom object:
Row.java
public class Row
{
public int RowNo;
public String RowText;
public Row(int no, String text)
{
this.RowNo = no;
this.RowText = text;
}
}
Here is my custom ArrayAdapter:
RowAdapter.java
public class RowAdapter extends ArrayAdapter<Row> {
private final Activity _context;
private final ArrayList<Row> rows;
static class ViewHolder
{
EditText RowNo;
EditText RowText;
}
public RowAdapter(Activity context, ArrayList<Row> rows)
{
super(context,R.layout.row_layout, R.id.row_id ,rows);
this._context = context;
this.rows = rows;
}
public View GetView(int position, View convertView, ViewGroup parent){
ViewHolder holder = null;
if(convertView == null)
{
LayoutInflater inflater = _context.getLayoutInflater();
convertView = inflater.inflate(R.layout.row_layout,parent,false);
holder = new ViewHolder();
holder.RowNo = (EditText)convertView.findViewById(R.id.row_no);
holder.RowText = (EditText)convertView.findViewById(R.id.row_text);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.RowNo.setText(rows.get(position).RowNo);
holder.RowText.setText(rows.get(position).RowText);
return convertView;
}
}
Here is my Activity class:
RowActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.row_list_page);
listView = (ListView)findViewById(R.id.list_view);
ArrayList<Row> rows = new ArrayList<Row>();
rows.add(new Row(1,"Test"));
rows.add(new Row(2,"Test"));
rows.add(new Row(3"Test"));
RowAdapter adapter = new RowAdapter(this,rows);
listView.setAdapter(adapter);
}

Here is working adapter code
public class RowAdapter extends ArrayAdapter<Row> {
private final Activity _context;
private final ArrayList<Row> rows;
public class ViewHolder
{
EditText RowNo;
EditText RowText;
}
public RowAdapter(Activity context, ArrayList<Row> rows)
{
super(context,R.layout.row_layout, R.id.row_id ,rows);
this._context = context;
this.rows = rows;
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
ViewHolder holder = null;
if(convertView == null)
{
LayoutInflater inflater = _context.getLayoutInflater();
convertView = inflater.inflate(R.layout.row_layout,parent,false);
holder = new ViewHolder();
holder.RowNo = (EditText)convertView.findViewById(R.id.row_no);
holder.RowText = (EditText)convertView.findViewById(R.id.row_text);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.RowNo.setText(""+rows.get(position).RowNo);
holder.RowText.setText(rows.get(position).RowText);
return convertView;
}
}
Your getting exception at holder.RowNo.setText(rows.get(position).RowNo);
so replace it with
holder.RowNo.setText(""+rows.get(position).RowNo);

Change with below code:-
RowAdapter.java
public class RowAdapter extends BaseAdapter {
private final Context _context;
private final ArrayList<Row> rows;
public RowAdapter(Context context, ArrayList<Row> rows)
{
this._context = context;
this.rows = rows;
}
#Override
public int getCount() {
return rows.size();
}
#Override
public Object getItem(int position) {
return rows;
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent){
LayoutInflater inflater = (LayoutInflater) _context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView=inflater.inflate(R.layout.row_layout, null,true);
EditText RowNo = (EditText) rowView.findViewById(R.id.row_no);
EditText RowText = (EditText) rowView.findViewById(R.id.row_text);
RowNo.setText(rows.get(position).RowNo);
RowText.setText(rows.get(position).RowText);
return rowView;
}
}

public View getView (int position, View convertView, ViewGroup parent)
This method is called to get view object.
In your code there is GetView, not getView

change your
public View GetView(int position, View convertView, ViewGroup parent)
with
#Override
public View getView(int position, View convertView, ViewGroup parent)
and
holder.RowNo.setText(rows.get(position).RowNo);
with
holder.RowNo.setText(""+rows.get(position).RowNo);

Using OnItemClickListener on CheckBoxes in ListView with Adapter

I have a row which is represented by an image, some text and a CheckBoxes. Whenever I'm trying to use the OnItemClickListener for the rows, the event won't fire up when clicking the CheckBoxes.
I also tried checkbox.onCheckedChangedListener but it gives me Null Pointer at findViewByID. I checked, the ID I am looking for is alright, no typos in there.
I'd like to make usage of this OnItemClickListener so later on I can play with the checkboxes. Any ideas?
Code:
ADAPTER:
public class FilterAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<String> mFilters;
private ArrayList<Integer> mPictures;
private Typeface Bebas, DroidSans;
public FilterAdapter(Context context, ArrayList<String> filters, ArrayList<Integer> pictures) {
this.mContext = context;
this.mFilters = filters;
this.mPictures = pictures;
}
#Override
public int getCount() {
return mFilters.size();
}
#Override
public Object getItem(int position) {
return mFilters.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
mContext.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.category_filter_item, null);
}
DroidSans = Typeface.createFromAsset(mContext.getAssets(), "fonts/DroidSans.ttf");
ImageView filter_img = (ImageView) convertView.findViewById(R.id.category_picture);
TextView filter_category = (TextView) convertView.findViewById(R.id.filter_category);
CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.check_box);
filter_category.setTypeface(DroidSans);
filter_category.setText(mFilters.get(position));
filter_img.setBackgroundResource(mPictures.get(position));
return convertView;
}
}
Class where using the Adapter:
public class CheckinFilters extends Fragment {
private ListView mListView;
private FilterAdapter filterAdapter;
private ArrayList<String> l = new ArrayList<String>();
private ArrayList<Integer> drawables = new ArrayList<Integer>();
private Typeface Bebas;
private ArrayList<Integer> checkboxes = new ArrayList<Integer>();
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor editor;
public CheckinFilters() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_checkin_filters, container, false);
l.add("Chill");
l.add("Eat");
l.add("Explore");
l.add("Move");
l.add("Party");
l.add("Whatever");
drawables.add(R.drawable.category_chill);
drawables.add(R.drawable.category_eat);
drawables.add(R.drawable.category_explore);
drawables.add(R.drawable.category_move);
drawables.add(R.drawable.category_party);
drawables.add(R.drawable.category_whatever);
mListView = (ListView) view.findViewById(R.id.filter_list);
filterAdapter = new FilterAdapter(view.getContext(), l, drawables);
mListView.setAdapter(filterAdapter);
sharedPreferences = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
Bebas = Typeface.createFromAsset(view.getContext().getAssets(), "fonts/BebasNeue.otf");
TextView mainHeader = (TextView) view.findViewById(R.id.filters_text);
mainHeader.setTypeface(Bebas);
SearchView filter_categories = (SearchView) view.findViewById(R.id.filter_categories);
int searchImgID = getResources().getIdentifier("android:id/search_button", null, null);
ImageView searchViewHint = (ImageView) filter_categories.findViewById(searchImgID);
searchViewHint.setImageResource(R.drawable.ab_icon_search);
int searchPlateID = filter_categories.getContext().getResources().getIdentifier("android:id/search_plate", null, null);
View searchPlateView = filter_categories.findViewById(searchPlateID);
if (searchPlateView != null) {
searchPlateView.setBackgroundResource(R.drawable.search_location_shape);
}
int searchViewID = filter_categories.getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
TextView textView = (TextView) filter_categories.findViewById(searchViewID);
textView.setTextColor(Color.GRAY);
CheckBox checkBox = (CheckBox) view.findViewById(R.id.check_box);
return view;
}
private void save() {
sharedPreferences = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
editor.putInt("first", checkboxes.size());
for (int i = 0; i < checkboxes.size(); i++) {
editor.remove("Status_" + i);
editor.putInt("Status_" + i, checkboxes.get(i));
}
editor.commit();
}
private void load() {
sharedPreferences = getActivity().getPreferences(Context.MODE_PRIVATE);
int size = sharedPreferences.getInt("first", 0);
for (int i = 0; i < size; i++) {
checkboxes.add(sharedPreferences.getInt("Status_" + i, 0));
}
}
#Override
public void onPause() {
super.onPause();
save();
}
#Override
public void onResume() {
super.onResume();
load();
}
}
Layout I'm inflating for Adapter:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ECF0F1">
<ImageView
android:id="#+id/category_picture"
android:layout_width="70dp"
android:layout_height="60dp"
android:background="#drawable/sm_profile"/>
<TextView
android:id="#+id/filter_category"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/category_picture"
android:padding="10dp"
android:text="Party"
android:textColor="#color/enloop_dark_gray"
android:textSize="18dp"/>
<CheckBox
android:id="#+id/check_box"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:padding="10dp"/>
</RelativeLayout>
</RelativeLayout>

Instead of using OnItemClickListener in CheckinFilters.java, you should add that code in getView() method of FilterAdapter. You are actually adding checkbox for every row but the id for all checkbox is same, so you can't apply customized code for every checkbox.
To be able to make use of all checkboxes you can put checkbox code in getView() method because it also contains an argument called position. So you can just get the position and apply OnItemClickListener to every single checkbox. That way it will work.
public class FilterAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<String> mFilters;
private ArrayList<Integer> mPictures;
private Typeface Bebas, DroidSans;
public FilterAdapter(Context context, ArrayList<String> filters, ArrayList<Integer> pictures) {
this.mContext = context;
this.mFilters = filters;
this.mPictures = pictures;
}
#Override
public int getCount() {
return mFilters.size();
}
#Override
public Object getItem(int position) {
return mFilters.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
mContext.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.category_filter_item, null);
}
DroidSans = Typeface.createFromAsset(mContext.getAssets(), "fonts/DroidSans.ttf");
ImageView filter_img = (ImageView) convertView.findViewById(R.id.category_picture);
TextView filter_category = (TextView) convertView.findViewById(R.id.filter_category);
CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.check_box);
filter_category.setTypeface(DroidSans);
filter_category.setText(mFilters.get(position));
filter_img.setBackgroundResource(mPictures.get(position));
if(position == 0) {
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked)
else {
}
}
});
}
//Similarly add OnClickListener to other checkboxes.
return convertView;
}
}