Hi I have a question. Wondering how do I get certain values from the OnItemClick method. I can get position but seen as I have more then 1 textview in this position is it possible to get the first textview?
Heres my code
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
HashMap<String, String> map = new HashMap<String, String>();
for(int i=0; i<poi.length; i++){
map = new HashMap<String, String>();
map.put("first", poi[i][0]);
map.put("second",poi[i][1]);
mylist.add(map);
}
SimpleAdapter mSchedule = new SimpleAdapter(this, mylist, R.layout.row,
new String[] {"first", "second"}, new int[] {R.id.FIRST, R.id.SECOND});
list.setAdapter(mSchedule);
list.setTextFilterEnabled(true);
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
Log.i("owen", Integer.toString(position));
//my code to get "first" string on click
}
Thanks
If you know the resource identifier for the desired textview, you can take the view passed into the onitemClick() method and find that child:
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
TextView myText = (TextView) v.findViewById(R.id.my_textview);
Log.i("owen", myText.getText().toString());
}
The position relates to the row position in the AdapterView list.
Related
I'm new to Android. I want use a SimpleAdapter with a custom layout. Do I have store the original data and then use the id to access it? the view parameter should be something that I can use. But what is the proper way to do it?
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_section);
ListView listView = (ListView) findViewById(R.id.MyListView);
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
for(int i=0;i<30;i++)
{
HashMap<String, String> map = new HashMap<String, String>();
map.put("ItemTitle", "This is Title.....");
map.put("ItemText", "This is text.....");
mylist.add(map);
}
SimpleAdapter mSchedule = new SimpleAdapter(this,
mylist,
R.layout.list_delegate,
new String[] {"ItemTitle", "ItemText"},
new int[] {R.id.ItemTitle,R.id.ItemText});
listView.setAdapter(mSchedule);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Log.d(TAG, "clicked: " + view);
}
});
}
//simplified activity_section.xml
<LinearLayout
android:id="#+id/MyListItem">
<TextView
android:id="#+id/ItemTitle"/>
<TextView
android:id="#+id/ItemText"/>
</LinearLayout>
Use findViewById to access ItemTitle and ItemText from clicked row of ListView as:
String itemTitle = ((TextView)
view.findViewById(R.id.ItemTitle)).getText().toString();
Do same for accessing ItemText TextView value
I managed to show a list from sqllite, now I want that when the user click on the item, the item will be deleted. the problem is that the item's ID number from the sql is different from the listview's ID. so how can I delete the selected item?
I mean this id:
public void onItemClick(AdapterView parent, View view,int position, long id)
is different from the item's ID from the sqllite.
thank you for help
Cursor resultSet = db.rawQuery("Select * from list ORDER BY `ID` DESC",null);
resultSet.moveToFirst();
final ListView listview = (ListView) findViewById(R.id.listView1);
ArrayList<HashMap<String, String>> mylistData = new ArrayList<HashMap<String, String>>();
String[] columnames = new String[] {"C1", "C2", "C3"};
int[] columnsR = new int[] {R.id.column1, R.id.column2, R.id.column3};
int x=0;
while(resultSet.moveToNext()){
HashMap<String,String> map = new HashMap<String, String>();
String d_weight = resultSet.getString(resultSet.getColumnIndex("weight"));
String d_date = resultSet.getString(resultSet.getColumnIndex("date"));
String d_id = resultSet.getString(resultSet.getColumnIndex("ID"));
x=0;
map.put(columnames[x],d_weight);
x++;
map.put(columnames[x],d_date);
x++;
map.put(columnames[x],d_id);
mylistData.add(map);
}
SimpleAdapter arrayAdapter = new SimpleAdapter(this, mylistData, R.layout.row,columnames , columnsR);
listview.setAdapter(arrayAdapter);
listview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,int position, long id)
{
// how to delete? =[
}});
Would it not be easier to make an object that you fill with the data from your sql query for each entry? Then you just populate the listview with a list of these objects, which means that when one of the objects get clicked on the id will be stored inside the object. Then int position would have the same value as the position in your list of objects.
How does that sound?
I am using onItemClickListener() with a List. I want to pass name of the item clicked on, and an arbitrary number to next instance of the list. How can this be done?
Edit: here is the class:
public class ListViewA extends Activity{
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView lv= (ListView)findViewById(R.id.listview);
// create the grid item mapping
String[] from = new String[] {"col_1"};
int[] to = new int[] {R.id.item2};
// prepare the list of all records
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
for(int i = 0; i < 10; i++){
HashMap<String, String> map = new HashMap<String, String>();
map.put("col_1", "col_1_item_" + i);
fillMaps.add(map);
lv.setOnItemClickListener(onListClick);
}
// fill in the grid_item layout
SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.grid_item, from, to);
lv.setAdapter(adapter);
}
private AdapterView.OnItemClickListener onListClick=new AdapterView.OnItemClickListener(){
public void onItemClick(AdapterView<?> parent,View view, int position, long id)
{
Intent i=new Intent(ListViewA.this,ListViewA.class);
startActivity(i);
}
};
}
Following example shows you how to pass data onItemClick for particular position.
ListView lv = getListView();
// listening to single list item on click
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// selected item
HERE YOU GOT POSITION FOR PERTICULAR ITEM
// Launching new Activity on selecting single List Item
Intent i = new Intent(getApplicationContext(), SingleListItem.class);
// sending data to new activity
i.putExtra("position", fillMaps.get(position));
startActivity(i);
}
});
And yes you need to declare fillMaps as globally.
public class ListViewA extends Activity{
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);......
Intent i=new Intent(ListViewA.this,ListViewA.class);
i.putExtra("Key", fillMaps.get(position));
startActivity(i);
You can use above code in your onItemClickListner.
In this method the third agrument is position. So you have to use this eg. The Arraylist you are passing to your listView contains the data shown on listView. so use this kind of code
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
// TODO Auto-generated method stub
String data= mArrlist.get(position);
}
If you are using the arralist of String type otherwise If you are using arraylist of getter setter class then use
mArralist.get(potion).getName();
You should get item #paticular position
HashMap<String, String> item = adapterview.getAdapter().getItem(position);
check your condition according to requirement and by getting data from item and process further.
Intent i=new Intent(ListViewA.this,ListViewA.class);
i.putExtra("item", item);
startActivity(i);
For adding arbitrary number you can use the Random class of java as below
Random mRandom = new Random();
int random = mRandom.nextInt(mMoveToList.size());
random variable of int type return every time random value.
you can use getItem(int position) of SimpleAdapter
put your SimpleAdapter variable adapter as global
in your ClickListener call adapter.getItem(position)
I am having an issue with trying to retrieve the contents of the view that the the user has clicked within a ListView. My ListView is setup using a SimpleAdapter and is comprised of a "heading" and a "sub-title" for each of the items in the list. These are stored using a HashMap.
Within the activity also, is a spinner, when the user selects an item in the spinner, the ListView is updated. This is working fine and I just thought it necessary to mention what is happening within the activity as well.
What I am trying to do, is retrieve which item the user has selected so I can guide them to a new activity based on their selection (right now just trying to display the view contents with Toast). I want to retrieve the contents of what is stored under the "engExp" key for the item.
Here is my code:
// HASHMAP FOR LISTVIEW
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
for(int x = 0; x < expressionListForModule.getCount(); x++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put("engExp", expressionListForModule.getString(0));
map.put("japDef", expressionListForModule.getString(1));
fillMaps.add(map);
expressionListForModule.moveToNext();
}
// SETUP LISTVIEW
SimpleAdapter adapter2 = new SimpleAdapter(this, fillMaps, android.R.layout.simple_list_item_2, new String[] {"engExp","japDef"}, new int[] {android.R.id.text1, android.R.id.text2});
ListView lv = (ListView) findViewById(R.id.expressionList);
lv.setAdapter(adapter2);
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(), ((TextView) view).getText(), Toast.LENGTH_LONG).show();
}
});
Specifically, the item that is causing the application to crash is this:
((TextView) view).getText()
If you need to see any more of my code, please let me know.
Any help is appreciated, thanks in advance.
try
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView v = (TextView) view.findViewById(android.R.id.text1);
String contentForLink = v.getText().toString();
Toast.makeText(getApplicationContext(), contentForLink, Toast.LENGTH_LONG).show();
}
});
I'm writing a news-app and I'm having some trouble with displaying a custom list. All I want is that list items have 2 TextViews in them:
News-Title and
News-Description
These are contained in 2 static arrays: homeScreen.title[] and homeScreen.descriptionLong[].
Lower you have my code for the HashMap and the Adapter:
final static ArrayList> data = new ArrayList>();
static{
HashMap<String, String> row = new HashMap<String, String>();
for (int i = 0; i<HomeScreen.arrayLength; i++){
row.put("Title", HomeScreen.title[i]);
row.put("Description", HomeScreen.descriptionLong[i]);
data.add(row);
}
}
SimpleAdapter adapter = new SimpleAdapter(this,
data,
R.layout.mainmenu,
new String[] {"Title", "Description"},
new int[] { R.id.textView1, R.id.textView2});
setListAdapter(adapter);
}
public void onItemClick(SimpleAdapter arg0, View arg1, int position,
long id) {
selectedNews = position;
Toast.makeText(getApplicationContext(), "This is: " + selectedNews, Toast.LENGTH_LONG).show();
Intent intent = new Intent(MainMenu.this, ReadNews.class);
startActivity(intent);
}
The problem I'm having is that it only displays my 20'th (last) news information and also the default OnItemClick isn't working anymore. I'd appreciate your help...
You should put the row instantiation inside the for loop:
for (int i = 0; i<HomeScreen.arrayLength; i++){
HashMap<String, String> row = new HashMap<String, String>();
row.put("Title", HomeScreen.title[i]);
row.put("Description", HomeScreen.descriptionLong[i]);
data.add(row);
}
Update:
Your OnItemClickListener registration should look something like this:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// your code here
}
});