Develop Reference

Custom ListViews,ArrayLists,ArrayAdapters

I'm trying to build an Attendance Manager app for students and am using a custom ListView to display subject names and minimum attendance when tapped on.
These are the Issues I'm facing::
1) I want my first list item to be an "Add a subject item" and on tapping on that it goes to AddSubjectActivity and stores everything via SharedPreferences.
2)Once the submit button is pressed in the AddSubjectActivity i want the next list item to say "Tap to add a subject" and so on.
3) Basically ,suppose the ListView has 5 items, tapping on each item takes me to the AddSubject Activity, but information corresponding to the respective list Item being tapped is displayed in it.
This is my Code:
Class CustomAdapter
public class CustomAdapter extends BaseAdapter{
String [] result;
Context context;
int [] imageId;
private static LayoutInflater inflater=null;
public CustomAdapter(SecondActivity mainActivity, String[] prgmNameList, int[] prgmImages) {
// TODO Auto-generated constructor stub
result=prgmNameList;
context=mainActivity;
imageId=prgmImages;
inflater = ( LayoutInflater )context.
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return result.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public class Holder
{
TextView tv;
ImageView img;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
Holder holder=new Holder();
SecondActivity second=new SecondActivity();
View rowView;
rowView = inflater.inflate(R.layout.program_list, null);
holder.tv=(TextView) rowView.findViewById(R.id.textView);
holder.img=(ImageView) rowView.findViewById(R.id.statsImageView);
holder.tv.setText(result[position]);
holder.img.setImageResource(imageId[position]);
rowView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
Toast.makeText(context, "You Clicked "+result[position], Toast.LENGTH_LONG).show();
context.startActivity(new Intent(context, AddSubject.class));
}
});
return rowView;
}
}
SecondActivity: The Activity that contains the ListView
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Bundle bundle=getIntent().getExtras();
String fullNameFinal = bundle.getString("fullName");
String courseFinal = bundle.getString("course");
int avgAttendanceFinal= bundle.getInt("avgAttendance");
boolean logInStatusFinal = bundle.getBoolean("logInStatus");
nameTextView=(TextView)findViewById(R.id.nameTextView);
courseTextView=(TextView)findViewById(R.id.courseTextView);
nameTextView.setText(fullNameFinal);
courseTextView.setText(courseFinal);
overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
ListView lv;
Context context;
ArrayList prgmName;
int [] prgmImages={R.drawable.listblockgold,R.drawable.listblockindigo,R.drawable.listblocklime,R.drawable.listblockorange,R.drawable.listblockpink,R.drawable.listblockred,R.drawable.listblocksilver,R.drawable.listblocktan,R.drawable.listblockteal};
String [] prgmNameList={"Maths","P.Comm.","IOT","Operating Systems","Web Programming","DSP","PHP","Jquery","JavaScript"};
context=this;
lv=(ListView) findViewById(R.id.testListView);
lv.setAdapter(new CustomAdapter(this, prgmNameList,prgmImages));
`AddSubject Activity`
public class AddSubject extends AppCompatActivity {
//Buttons
Button missedMinus;
Button missedPlus;
//ButtonsEnd
//TextViews
TextView safeBunksNumber;
TextView missedLectures;
TextView totalLecturesTextView ;
TextView percentageTextView;
//TextViewsEnd
EditText missedLecturesTextView;
ProgressBar progressBar;
static String s= Integer.toString(10);
public void missedMinusClick(View view)
{
totalLecturesTextView=(TextView)findViewById(R.id.totalLecturesTextView);
int totalLectures= Integer.parseInt(totalLecturesTextView.getText().toString());
missedLecturesTextView=(EditText)findViewById(R.id.missedLecturesTextView);
int missedLectures= Integer.parseInt(missedLecturesTextView.getText().toString());
missedLecturesTextView.setText(Integer.toString(missedLectures-1));
safeBunksNumber=(TextView)findViewById(R.id.safeBunksNumber);
int safeBunksNumber;
}
public void missedPlusClick(View view2)
{
missedLecturesTextView=(EditText)findViewById(R.id.missedLecturesTextView);
int missedLectures= Integer.parseInt(missedLecturesTextView.getText().toString());
missedLecturesTextView.setText(Integer.toString(missedLectures+1));
}
public void submitOnClick1(View view3)
{
EditText subName = (EditText)findViewById(R.id.subName);
EditText totalLecturesTextView = (EditText)findViewById(R.id.totalLecturesTextView);
EditText missedLecturesTextView =(EditText)findViewById(R.id.missedLecturesTextView);
String subjectName = subName.getText().toString();
int totalLectures = Integer.parseInt(totalLecturesTextView.getText().toString());
int missedLectures = Integer.parseInt(missedLecturesTextView.getText().toString());
SharedPreferences sharedPreferences = this.getSharedPreferences("com.example.yashrandive.attendancemanager", Context.MODE_PRIVATE);
sharedPreferences.edit().putString("subName",subjectName);
sharedPreferences.edit().putInt("totalLectures",totalLectures);
sharedPreferences.edit().putInt("missedLectures",missedLectures);
}
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_subject);
}
}

How to update values in database using an update image button in custom list adapter?

This is my custom list adapter. I want to update the values in table using the update ImageButton in the list. On clicking it, the old values should be shown in a new activity and then the edited value must be stored in the database. However, I am unable to pass an intent inside the onClick() method.
Please suggest me a solution
public class CustomListAdapter extends BaseAdapter implements ListAdapter
{
private ArrayList<String> list = new ArrayList<String>();
private Context context;
OnItemSelectedListener onItemSelectedListener;
public int pos;
String pass,pass2,edit,epass;
public CustomListAdapter(List list, Context context) {
this.list = (ArrayList<String>) list;
this.context = context;
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int pos) {
//pass2 = list.toString();
return list.get(pos);
}
//#Override
//public Long getItemId(int pos) {
//
// //just return 0 if your list items do not have an Id variable.
//}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.layout_custom_list, null);
}
//Handle TextView and display string from your list
final TextView listItemText = (TextView)view.findViewById(R.id.list_item_string);
listItemText.setText(list.get(position));
//Handle buttons and add onClickListeners
ImageButton deleteBtn = (ImageButton)view.findViewById(R.id.delete_btn);
ImageButton editBtn = (ImageButton)view.findViewById(R.id.edit_btn);
//Button addBtn = (Button)view.findViewById(R.id.add_btn);
deleteBtn.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
//do something
list.remove(position);
pass = listItemText.getText().toString();
notifyDataSetChanged();
pass2 = pass.substring(0,pass.indexOf(' '));
System.out.println(pass2);
Moneydb.delete(pass2);
}
});
editBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v2) {
// TODO Auto-generated method stub
edit=listItemText.getText().toString();
epass = listItemText.getText().toString();
edit = epass.substring(0,epass.indexOf(' '));
Moneydb.edit(edit);
}
});
return view;
}
protected Context getContext() {
// TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
//return list.get(position).getId();
return 0;
}
public void clear() {
//CustomListAdapter collection = null;
// TODO Auto-generated method stub
list.clear();
notifyDataSetChanged();
}

I suggest you to assign and ContextMenu to your list view with two MenuItem, Edit and Delete and write associated code outside of adapter
or you can start Activity by :
Intent new_intent = new Intent(v.getRootView().getContext(),edit_activity.class);
new_intent.putExtra("Key","Value");
v.getRootView().getContext().startActivity(new_intent);
i think the first method is best ;)

How to Show Dialog while user do Tap on List Item Row

whenever user do tap on list item row i am trying to show dialog, but getting nothing whenever i do click on list item row, why?
Here I just want to update value of total by accepting new qty from user in dialog via show that value in place of quantity in a List row ....
CartActivity.java:
public class CartActivity extends Activity {
ListView mLstView1;
CartAdapter mViewCartAdpt;
final private static int DIALOG_QUANTITY = 1;
EditText update_quantity ;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cart);
mLstView1 = (ListView) findViewById(R.id.listView1);
mViewCartAdpt = new CartAdapter(CartActivity.this);
mLstView1.setAdapter(mViewCartAdpt);
mLstView1.setOnItemClickListener(new OnItemClickListener() {
#SuppressWarnings("deprecation")
public void onItemClick(AdapterView<?> parent, View v,
final int position, long id)
{
showDialog(DIALOG_QUANTITY);
}
});
}
protected Dialog onCreateDialog(int id) {
AlertDialog dialogDetails = null;
switch (id) {
case DIALOG_QUANTITY:
LayoutInflater inflater = LayoutInflater.from(this);
View dialogview = inflater.inflate(R.layout.dialog_layout, null);
AlertDialog.Builder dialogbuilder = new AlertDialog.Builder(this);
dialogbuilder.setTitle("Image Information");
dialogbuilder.setView(dialogview);
dialogDetails = dialogbuilder.create();
break;
}
return dialogDetails;
}
protected void onPrepareDialog(int id, Dialog dialog) {
switch (id) {
case DIALOG_QUANTITY:
final AlertDialog alertDialog = (AlertDialog) dialog;
Button updateQuantityButton = (Button) alertDialog
.findViewById(R.id.btn_login);
Button cancelbutton = (Button) alertDialog
.findViewById(R.id.btn_cancel);
update_quantity = (EditText) alertDialog
.findViewById(R.id.edit_new_qty);
updateQuantityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
cancelbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDialog.dismiss();
}
});
break;
}
}
// Called when the activity begins interacting with the user
#Override
protected void onResume(){
super.onResume();
mViewCartAdpt.notifyDataSetChanged();
}
}
CartAdapter.java:
public class CartAdapter extends BaseAdapter {
public static final String LOG_TAG = "CartAdapter";
public static final String KEY_TITLE = "title";
public static final String KEY_COST = "cost";
public static final String KEY_QTY = "qty";
public static final String KEY_TOTAL = "total";
Activity activity;
LayoutInflater inflater;
ImageButton mImgBtnDelete;
ListView listView;
private double itemamount = 0;
private int itemquantity = 0;
public CartAdapter(Activity a) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
// TODO Auto-generated method stub
return Constants.sItem_Detail.size();
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.listrow_cart, null); // listrow_cart
vi.setClickable(true);
vi.setFocusable(true);
vi.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
}
});
final TextView title = (TextView) vi.findViewById(R.id.title);
final TextView qty = (TextView) vi.findViewById(R.id.qty);
final TextView cost = (TextView) vi.findViewById(R.id.cost);
final TextView total = (TextView) vi.findViewById(R.id.total);
HashMap<String, String> item = new HashMap<String, String>();
item = Constants.sItem_Detail.get(position);
// Setting all values in listview
title.setText(item.get(com.example.sample.ItemsActivity.KEY_TITLE));
cost.setText(item.get(com.example.sample.ItemsActivity.KEY_COST));
qty.setText("1");
itemquantity = Integer.parseInt(qty.getText().toString());
itemamount = Double.parseDouble(cost.getText().toString());
total.setText(new DecimalFormat("##.#").format(itemamount*itemquantity));
return vi;
}
}

Take your Dialog inside your activity, where you have to do code for listiview click, inside click show your dialog,
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
//show dialog.
}
});
I can see, your dialog having two buttons and one editbox, and whatever values is to be input in editbox, you updating your list value with editbox value.
Grab editbox value and update your list array, which you are setting on adapter to fill your listview.
updateQuantityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// here you have to fetch editbox value and update your arraylist and then notify your adapter.
}
});

I believe this is because onCreateDialog() and onPrepareDialog() should be overriden in an activity, not in the adapter.
Since you declared activity to be of type Activity, calling activity.showDialog() won't have any effect.
What you have to do, is to move those methods in the activity you want the dialogs to be displayed, then pass to the CardAdapter and instance of your activity and use it in the adapter.
new CardAdapter(MyActivity.this);
//...
public class CardAdapter .... {
public MyActivity activity;
//.......
activity.showDialog
}
Though, I would suggest to use DialogFragment instead.

you can use this way when click on item of the list view then open the dialog box and whatever changes or update in list then use setNotifyDataChanged() before set the adapter on list view
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
yourActivty.this.showDialog(DIALOG_QUANTITY);
}
});

is it possible to have two TextView in a listView item?

i would like to create a listView, but i want in every listitem to have 2 different textViews and a button..is that possible?
i m using a row xml file for my list items..
public class main extends Activity {
private ListView lv1;
private String lv_arr[]={"a","b","c","d"};
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.list);
lv1.setAdapter(new ArrayAdapter<String>(this,R.layout.row , lv_arr));
lv1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch( position )
{
case 0: Intent newActivity = new Intent(chania.this, cafe.class);
break;
//...........
}
}
});
}
}

Yes, just wrap them in a Layout, for example LinearLayout.
Here is an example - look for Row Layout.

Create your own custom Adapter which extends Base Adapter.
Try the code below(I have used 7 textview,wrapped in a customized layout xml file):
public class Received_invitationAdapter extends BaseAdapter{
Context ctx_invitation;
public Received_invitationAdapter(Context ctx_invitation)
{
super();
this.ctx_invitation = ctx_invitation;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return PartyName.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return PartyName[position];
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View v = null;
try
{
String inflater = Context.LAYOUT_INFLATER_SERVICE;
LayoutInflater li = (LayoutInflater)ctx_invitation.getSystemService(inflater);
v = li.inflate(R.layout.receivedinvitations, null);
TextView tv_partyname = (TextView)v.findViewById(R.id.tv_receivedinvitation_PartyTitle);
TextView tv_partydate = (TextView)v.findViewById(R.id.tv_receivedinvitation_date);
TextView tv_partytime = (TextView)v.findViewById(R.id.tv_receivedinvitation_time);
TextView tv_partylocation = (TextView)v.findViewById(R.id.tv_receivedinvitation_PartyLocation);
TextView img_chkbox = (TextView)v.findViewById(R.id.img_chkbox_receivedinvitation);
TextView img_inv_accepted = (TextView)v.findViewById(R.id.img_accept_receivedinvitation);
TextView img_inv_rejected = (TextView)v.findViewById(R.id.img_reject_receivedinvitation);
tv_partyname.setText(PartyName[position]);
tv_partydate.setText(PartyDate[position]);
tv_partytime.setText(PartyTime[position]);
tv_partylocation.setText(PartyLocation[position]);
System.out.println(""+img_chkbox.getVisibility());
}
catch(Exception e)
{
e.printStackTrace();
}
return v;
}
The receivedinvitations.xml file contains the 7 textview defined in the getview method.

getting data from edittext placed in listview

I created a list with textview & edittext using holder... it looks like
Textview Edittext
---------------------------------
Textview Edittext
---------------------------------
Textview Edittext
---------------------------------
but I cant get the data from each every Edittext...
can any one assist me.. how to achieve it... assist with sample code...

I had a similar problem, i did as follows;
View view = listview.getChildAt(position);
EditText text = (EditText)view.findViewById(R.id.myEditBox);
String contents = text.getText().toString();
Hope it helps!
// Fredrik

for (int i = 0; i < telefoneListView.getAdapter().getCount(); i++) {
View viewTelefone = telefoneListView.getChildAt(i);
EditText tipoEditText = (EditText) viewTelefone.findViewById(R.id.telefone_form_tipo);
EditText telefoneEditText = (EditText) viewTelefone.findViewById(R.id.telefone_form_telefone);
Log.d(TAG, tipoEditText.getText().toString() + ":" + telefoneEditText.getText().toString());
}
To navigate into all itens and get EditText on each.

Hi try the following code u will reach your requirement,
public class TestListView extends Activity {
ListView listView,listView2;
String[] titles = {"List 1 title1","List 1 title2","List 1 title3","List 1 title4","List 1 title5","List 1 title6","List 1 title7","List 1 title8","List 1 title9"};
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = new ListView(this);
listView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
listView.setAdapter(new CustomListAdapetr(this, titles));
((LinearLayout)findViewById(R.id.mailLayout)).addView(listView);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
CustomView customView= (CustomView) arg0.getChildAt(arg2);
TextView textView = (TextView) customView.getChildAt(0);
Log.v("", ""+textView.getText());
}
});
}
public class CustomListAdapetr extends BaseAdapter{
private Context mContext;
private String[] list;
public CustomListAdapetr(Context context, String[] titles) {
mContext = context;
list = titles;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return list.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list[position];
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
CustomView cv;
if (convertView == null) {
cv = new CustomView(mContext,""+list[position]);
}
else {
cv = (CustomView) convertView;
cv.setTitle(list[position]);
}
return cv;
}
}
private class CustomView extends LinearLayout {
public CustomView(Context context, String itemName) {
super(context);
this.setOrientation(HORIZONTAL);
// Here we build the child views in code. They could also have
// been specified in an XML file.
mTitle = new TextView(context);
mTitle.setText(itemName);
mTitle.setTextSize(25);
addView(mTitle, new LinearLayout.LayoutParams(200, LayoutParams.WRAP_CONTENT));
}
/** * Convenience method to set the title of a SpeechView */
public void setTitle(String title) {
mTitle.setText(title);
}
/** * Convenience method to set the dialogue of a SpeechView */
private TextView mTitle;
}
}

Through
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
}
});
method we can get the click on item position .by using that position we get the appropriate edittext value