Question part: 1
I have created an activity which contains product id and product name as list items. Each row contains an edittext which can be used to enter quantity for a particular product. The rows also contain a checkbox to select the particular product.
This is how the list looks like:
When I click on the list items, I can get the id and name of the particular list item, but I also want to get the quantity entered by the user for the list item.
This is the activity responsible for generating the listview:
public class PollStationActivity extends Activity {
// Hashmap for ListView
ArrayList<HashMap<String, String>> PSList = new ArrayList<HashMap<String, String>>();
String status_code_from_prev;
List<HashMap<String, String>> fillMaps=null;
String alert_message;
String quantity_message;
//quantity edittext
EditText quantity_edit;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_poll_station);
//quantity edittext
quantity_edit = (EditText)findViewById(R.id.qty_editText);
//database insertion
DatabaseHelper db = new DatabaseHelper(this);
ContentValues values = new ContentValues();
try {
db.createDataBase();
values.put("_id", "1");
values.put("name", "rose");
db.insert(values);
} catch (IOException e) {
e.printStackTrace();
}
db.close();
ArrayList<TestItem> PSList = new ArrayList<TestItem>();
try {
db.createDataBase();
PSList = db.getAllData();
} catch (IOException e) {
e.printStackTrace();
}
db.close();
fillMaps = new ArrayList<HashMap<String, String>>();
Iterator<TestItem> i = PSList.iterator();
while(i.hasNext())
{
HashMap<String, String> map = new HashMap<String, String>();
TestItem objPSItem = i.next();
map.put("name", objPSItem.NAME);
map.put("Id", objPSItem.ID);
//map.put("quantity", objPSItem.QUANTITY);
fillMaps.add(map);
}
Log.i("Size: ", ""+fillMaps.size());
//populating listview from database
ListView listView1 = (ListView) findViewById(R.id.poll_list_listView);
if (null != listView1 && null != PSList) {
listView1.setAdapter(new ListAdapter(PollStationActivity.this,
R.id.ListViewContainer, new String[fillMaps.size()]));
}
}
//class for the list and on click handler
class ListAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public ListAdapter(Context context, int textViewResourceId,
String[] objects) {
super(context, textViewResourceId, objects);
// TODO Auto-generated constructor stub
this.context = context;
this.values = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
// return super.getView(position, convertView, parent);
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView = inflater.inflate(R.layout.list_layout, parent,
false);
final HashMap<String, String> map = fillMaps.get(position);
TextView textView = (TextView) rowView
.findViewById(R.id.list_label_name);
textView.setText("("+map.get("Id")+") "+map.get("name"));
rowView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
rowView.setBackgroundResource(R.drawable.list_bg_pressed);
Handler handler = new Handler();
Runnable r = new Runnable() {
public void run() {
rowView.setBackgroundResource(R.drawable.list_bg);
}
};
handler.postDelayed(r, 200);
//alert box
AlertDialog.Builder alertDialog = new AlertDialog.Builder(PollStationActivity.this);
// Setting Dialog Title
alertDialog.setTitle("Please Note!");
// Setting Dialog Message
alertDialog.setMessage("Are you sure you want to select "+"("+map.get("Id")+") "+map.get("name")+"?");
// Setting Positive "Yes" Button
alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
// Write your code here to invoke YES event
// Intent intent = new Intent(RegisterFirstActivity.this, RegisterSecondActivity.class);
//
// intent.putExtra("AC_Code", map.get(TAG_CODE));
// RegisterFirstActivity.this.startActivity(intent);
}
});
// Setting Negative "NO" Button
alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to invoke NO event
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
});
return rowView;
}
}
public void makeAToast(String str) {
//yet to implement
Toast toast = Toast.makeText(this,str, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
}
This is the TestItem class:
public class TestItem {
public String ID;
public String NAME;
public String QUANTITY;
public boolean selected;
// Empty constructor
public TestItem(){
}
// constructor
public TestItem(String id, String name, String quantity){
this.ID = id;
this.NAME = name;
this.QUANTITY = quantity;
}
// constructor
public TestItem(String name, String quantity){
this.NAME = name;
this.QUANTITY = quantity;
}
// getting ID
public String getID(){
return this.ID;
}
// setting id
public void setID(String id){
this.ID = id;
}
// getting name
public String getName(){
return this.NAME;
}
// setting name
public void setName(String name){
this.NAME = name;
}
// getting phone number
public String getQuantity(){
return this.QUANTITY;
}
// setting quantity
public void setQuantity(String quantity){
this.QUANTITY = quantity;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}
This is the activity_poll_station.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/main_bg">
<RelativeLayout
android:id="@+id/ListViewContainer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/poll_label_textView"
android:layout_centerHorizontal="true"
android:layout_marginTop="28dp" >
<ListView
android:id="@+id/poll_list_listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" >
</ListView>
</RelativeLayout>
</RelativeLayout>
This is the list_layout.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/library_linear_layout"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_alignParentLeft="true"
android:background="@drawable/list_bg"
android:padding="5dp" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="44dp"
android:background="@null" >
<TextView
android:id="@+id/list_label_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:text="name"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textSize="17sp" />
<CheckBox
android:id="@+id/item_checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"/>
<EditText
android:id="@+id/qty_editText"
android:layout_width="75dp"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:ems="10"
android:maxLines="1"
android:inputType="number" >
</EditText>
</RelativeLayout>
</LinearLayout>
I want to how to extract text from the edittext which I have created for every list item. If I try to extract the text on
rowView.setOnClickListener(new View.OnClickListener()
like this:
// Setting Dialog Message
alertDialog.setMessage("Are you sure you want to select "+"("+map.get("Id")+") "+map.get("name")+"Quantity: "+quantity_edit.getText().toString()+"?");
The I am getting a null pointer exception getting generated due to the rowView.setOnClickListener(new View.OnClickListener()
What should I do? What should be the work around?
Thanks in advance!
//------------------------------------------------------------------------------//
Question part: 2
Now I want to do something like, I want to remove a particular row on clicking it. The row will only be deleted from the existing listview and a new list will be shown, how to do that?
Thanks once again!
