I am trying to separate different columns of data that appear in my listview. The code for the adapter is as follows:
public class SQLiteDemo extends ListActivity {
private SQLiteDatabase database;
private CursorAdapter dataSource;
private static final String fields[] = { "firstname", "lastname", "resourceid", BaseColumns._ID };
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
DatabaseHelper helper = new DatabaseHelper(this);
database = helper.getWritableDatabase();
Cursor data = database.query("cards", fields, null, null, null, null,
null);
dataSource = new SimpleCursorAdapter(this, R.layout.second, data, fields,
new int[] { R.id.firstname, R.id.secondname, R.id.name });
ListView view = getListView();
view.setHeaderDividersEnabled(true);
view.addHeaderView(getLayoutInflater().inflate(R.layout.second, null));
setListAdapter(dataSource);
I defined the listview in my layout file (do I need to do this for the inflater view?)
I have tried adding the dividers as follows....
<ListView android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="visible"
android:divider = "#android:color/transparent"
android:dividerHeight ="10.sp" />
There does not seem to be any difference after adding the divider items; what am I doing wrong?
To be clear, I am a complete android noob, not looking for a complete answer (although they can be useful sometimes) just a nudge in the right direction would be more than enough. Thanks guys!
EDIT WITH R.layout.second
<?xml version="1.0" encoding="utf-8" ?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:id="#+id/rowLayout"
android:orientation="horizontal"
android:layout_width="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_alignParentTop = "true"
android:layout_alignParentLeft="true"
android:layout_height="wrap_content"
android:id="#+id/firstname"
android:text="FirstName"/>
<TextView android:layout_width="wrap_content"
android:layout_toRightOf = "#+id/firstname"
android:layout_height="wrap_content"
android:id="#+id/secondname"
android:text="SecondName"
/>
<TextView android:layout_width="wrap_content"
android:layout_toRightOf = "#id/secondname"
android:layout_height="wrap_content"
android:id="#+id/name"
android:text="ResourceID"
/>
<ListView android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="visible"
android:dividerHeight ="10.sp" />
</RelativeLayout>
I have removed the divider transparency now that I know what it does.
You have a misunderstanding. You are using the same Layout (R.layout.second) for two different things.
You need one Layout for the whole screen that contains a ListView (i.e. R.layout.second).
setContentView(R.layout.second)
And then you use an other Layout (i.e. mycell.xml) to define the looks of a sigle row in that ListView.
new SimpleCursorAdapter(this, R.layout.mycell, data, fields, new int[] { R.id.firstname, R.id.secondname, R.id.name });
The divider is drawn horizontally for each row in your database. You made it invisible.
If you want to have dividers between firstname,lastname , etc (for each column) you have to edit the Layout you are using for the rows (R.layout.mycell).
Related
have problem with 'listView'. I searched everywhere but the problem does not arise none. Let me explain:
I have classic 'listview' in my 'layout':
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:id="#+id/roza"
android:tileMode="repeat">
<ListView
android:id="#android:id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#80ffffff"
android:alpha="200">
</ListView>
<TextView
android:id="#android:id/empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/no_todos" />
</LinearLayout>
And i create custom list_row xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="#+id/list_name"
android:layout_alignParentTop="true"
android:textSize="25dp"
android:layout_alignParentStart="true"
android:layout_alignEnd="#+id/list_rune" />
------------bla bla bla -----------------
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:layout_alignTop="#+id/list_date_update"
android:layout_toLeftOf="#+id/list_rune"
android:layout_toStartOf="#+id/list_rune"
android:id="#+id/textTester" />
</RelativeLayout>
My main class -
public class MainActivity extends ListActivity implements AdapterView.OnItemLongClickListener, SharedPreferences.OnSharedPreferenceChangeListener {
private NordBase dbHelper;
private Cursor cursor;
int rage = list_row; // my custom row
-------------------on create----------------
setContentView(R.layout.activity_main);
this.getListView().setDividerHeight(2);
dbHelper = new NordBase(this);
fillData();
------------------fillData-----------------
cursor = dbHelper.getAll();
startManagingCursor(cursor);
String[] from = new String[] { NordBase.NORD_NAME, NordBase.NORD_DESCRIPTION,
NordBase.NORD_PUNKTS, NordBase.NORD_PUNKTS_CROSS,
NordBase.NORD_DATE_CREATE, NordBase.NORD_DATE_UPDATE, NordBase.NORD_RUNE,
NordBase.NORD_IMPORTANT, NordBase.NORD_SUM };
int[] to = new int[] { R.id.list_name, R.id.list_description, R.id.list_punkts,
R.id.list_punkts_cross, R.id.list_date_create, R.id.list_date_update,
R.id.list_rune, R.id.list_important, R.id.list_sum, };
notes = new SimpleCursorAdapter(this,
rage, cursor, from, to);
setListAdapter(notes);
getListView().setOnItemLongClickListener(this);
Alas, I can not get to the items inside list_row, to bind them for comparison operators. for exp: if price == 0, then textview.setvisible = false...
I try LayoutInflater, but he make view element difrent from those in listview.
I try adapter binder class - but i think its no good for that.
Mostly i have an error - can't do that for the "null element"... that case - looks like all i ever do - my program can't findViewById elements in the list_row.
There is one point of contact
int[] to = new int[] { R.id.list_name, R.id.list_description, R.id.list_punkts,
R.id.list_punkts_cross, R.id.list_date_create, R.id.list_date_update,
R.id.list_rune, R.id.list_important, R.id.list_sum, };
notes = new SimpleCursorAdapter(this,
rage, cursor, from, to);
So help me Obi-Van Kenobi, and sorry for my dummy ENG, and i'm not sure that i past cod in right way)))
First of all your layout is not having the views which you have mention in the adapter like
R.id.list_description, R.id.list_punkts,
R.id.list_punkts_cross, R.id.list_date_create, R.id.list_date_update,
R.id.list_rune, R.id.list_important, R.id.list_sum
put this thing in the layout list_row xml
if you mean by ------------bla bla bla -----------------
this views than ok
also simpleCursorAdapter will not solve your purpose as you want to hide and show the views based on the data in respective views
so my first suggestion Change your layout to linearLayout or tableLayout or other layout as you feel and then do this in Your CustomAdapter class
like
class MyAdapter extends BaseAdapter
{
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//here you infalteYour layout and and do your logical thing
//you can take your data out from cursor and store in the arrayList<YourModelClass> type and have better control
}
}
otherwise in relative layout just fill the data don't hide it so it may work but if you do hiding of some views chances are high it will not solve your problem
and typo mistake is there i hope so like
int[] to = new int[] { R.id.list_name, R.id.list_description, R.id.list_punkts,
R.id.list_punkts_cross, R.id.list_date_create, R.id.list_date_update,
R.id.list_rune, R.id.list_important, R.id.list_sum, };
//here no item but still u have written "," after R.id.list_sum this like "R.id.list_sum, "
notes = new SimpleCursorAdapter(this,
rage, cursor, from, to);
I am using listview to display three textviews(values for these text views where come from database) and one checkbox. I would like to store the checkbox state when ever the user clicks the checkbox and display it when they came back. But, i am new to android development and i haven't got any idea how to do it. I have tried adding checkbox to the list view, but the onitemclick is disabled.Below are the code,
This is the cursor to retrieve values from database and list in listview,
Cursor yearcursor = db.paymentall(this);
String[] yearfrom = new String[]
{ PaymentAppDataBase.REQUESTEDDATE,PaymentAppDataBase.PAYMENTNAME,PaymentAppDataBase.AMOUNT };
int[] yearto = new int[] { R.id.Date,R.id.Name,R.id.Amount };
SimpleCursorAdapter yearadapter =
new SimpleCursorAdapter(this, R.layout.listview, yearcursor, yearfrom, yearto);
setListAdapter(yearadapter);
amount.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Cursor cursor = (Cursor) parent.getItemAtPosition(position);
String toaddressreview = cursor.getString(4);
String subjectreview = cursor.getString(5);
String emailbodyreview = cursor.getString(6);
Intent todayreview = new Intent(ReviewPayment.this,ReviewandResend.class);
todayreview.putExtra("toadd", toaddressreview);
todayreview.putExtra("subjectreveiew", subjectreview);
todayreview.putExtra("emailbody", emailbodyreview);
startActivity(todayreview);
}
});
Mt xml file:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:paddingTop="4dip"
android:paddingBottom="6dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:id="#+id/Date"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:textSize="14sp"/>
<TextView android:id="#+id/Name"
android:layout_width="120dip"
android:layout_height="wrap_content"
android:layout_weight="2"
android:scrollbarAlwaysDrawHorizontalTrack="true"
android:layout_toRightOf="#+id/Date"/>
<TextView android:id="#+id/Amount"
android:layout_width="50dip"
android:layout_height="20dip"
android:scrollbarAlwaysDrawHorizontalTrack="true"
android:layout_weight="2"
android:layout_toRightOf="#+id/Name"/>
<CheckBox
android:id="#+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="50dip"
android:layout_alignBottom="#+id/Amount"
android:layout_alignParentRight="true"
android:layout_toRightOf="#+id/Amount" />
</RelativeLayout>
It would be great if i get the answer for two questions,
1. How to save the state of the checkbox?
2. How to enable onitemclicklistener while using checkbox?
Thanks in advance
There is no easy way but to keep an array of boolean equal to the number of your list items and store the state. You need to make this a member variable of the custom adapter that you derive from your SimpleCursorAdapter.
Again, it needs to be part of your custom adapter. In your getView() function of the adapter, you need to implement the onCheckedChangeListener() [don't recall the exact name right now] for the checkbox and in your main Activity where you have the listview, set the onItemClickListener() to the listview.
If this doesn't make sense, just go through a bit in stackoverflow. This question has been dealt with numerous times.
It's my first Andoid app. I can't implement a multiple choise in my ListView(i want a checkbox in every row in my listview).
I'm using the notepadv3 tutorial.
Can someone help me, i'm a newbie in java.
private void fillData() {
ListView lView = (ListView) findViewById(android.R.id.list);
// Get all of the notes from the database and create the item list
//lView = (ListView) findViewById(R.id.liste);
Cursor c = mDbHelper.fetchAllNotes();
startManagingCursor(c);
String[] from = new String[] { NotesDbAdapter.KEY_TITLE };
int[] to = new int[] { R.id.text1 };
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter notes =
new SimpleCursorAdapter(this, R.layout.notes_row, c, from, to);
setListAdapter(notes);
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ListView
android:id="#+id/android:list"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<CheckBox android:text=""
android:id="#+id/list_checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="false"
/>
<TextView android:id="#id/android:empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/no_notes"/>
You need to include the checkbox in the xml layout R.layout.notes_row. If you post your xml code we might be able to help you more.
This thread in SO shows you how to display a CheckBox and TextView in each row of ListView and how to bind them to the database:
Android: Binding data from a database to a CheckBox in a ListView?
You might want to have a look.
I've now spent a full day on trying to get a custom row to load. There seem to be plenty of examples here on StackOverflow and other places on how to bind a checkbox to a row of data within an Android listview, but they all seem to be incomplete.
Here's what I have (row.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="40dip"
android:orientation="horizontal" android:background="#drawable/row_bk"
android:layout_gravity="center_vertical">
<TextView android:id="#+id/ItemID"
android:layout_weight="0" android:visibility="gone"
android:layout_width="0dp" android:gravity="center"
android:layout_height="wrap_content" />
<TextView android:id="#+id/Title"
android:layout_width="0dp" android:textColor="#666"
android:layout_weight="1" android:layout_height="40dip"
android:padding="5dp" android:gravity="center_vertical"
android:textSize="17dip" />
<CheckBox android:id="#+id/chkCheck" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:focusable="false" android:focusableInTouchMode="false" android:clickable="true"></CheckBox>
</LinearLayout>
In code, I have a SimpleCursorAdapter, populating the ListView.
Cursor oLoop = db
.rawQuery(
"select _id, title, is_checked from tbl",null);
startManagingCursor(oLoop);
String[] from = new String[] { "_id", "title", "is_checked" };
int[] to = new int[] { R.id.ItemID, R.id.Title, R.id.chkCheck };
SimpleCursorAdapter oList =
new SimpleCursorAdapter (this, R.layout.task_item_row, oLoop, from,
to);
setListAdapter(oList);
Past this, I'm not really sure what to do. If someone could point me at a good example, that would be great. The goal is to actually be able to toggle the checkboxes.
Thanks in advance!
Alex
Alex,
The next step is to implement ViewBinder.setViewValue()
It would look something like this:
getViewAdapter().setViewBinder(
new ViewBinder(){
public boolean setViewAdapter(View view, Cursor cursor, int columnIndex){
<JavaType> object = cursor.get<JavaType>(columnIndex);
boolean isHandled = false;
if(view.getId() == R.id.checkBox){
CheckBox cb = (CheckBox) view;
cb.setChecked(isObjectChecked(object));
// object depends on your underlying data type
// in the data base, use the debugger to find the actually implemented type.
isHandled = true;
}
return isHandled;
}
}
);
This can be a very powerful method with conditionally visible views and loading Uri's from the network, etc.
I am using a LinearLayout to display some Text and image. I have the images at drawable/ and i am implimenting this with ListActivity with some onListItemClick functionality. now i wants to change the image for the rows which are processed by onclick functionality to show the status as processed. can some one help me in this issue to change the image at runtime.
the following is my implimentation.
public class ListWithImage extends ListActivity {
/** Called when the activity is first created. */
private SimpleCursorAdapter myAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// raj setContentView(R.layout.main);
Cursor cursor = getContentResolver().query(People.CONTENT_URI, null, null, null, null);
startManagingCursor(cursor);
String[] columns = new String[] {People.NAME, People.NUMBER};
int[] names = new int[] {R.id.contact_name, R.id.contact_number};
myAdapter = new SimpleCursorAdapter(this, R.layout.main, cursor, columns, names);
setListAdapter(myAdapter);
}
#Override
protected void onListItemClick(ListView listView, View view, int position, long id) {
super.onListItemClick(listView, view, position, id);
Intent intent = new Intent(Intent.ACTION_CALL);
Cursor cursor = (Cursor) myAdapter.getItem(position);
long phoneId = cursor.getLong(cursor.getColumnIndex(People.PRIMARY_PHONE_ID));
intent.setData(ContentUris.withAppendedId(Phones.CONTENT_URI, phoneId));
startActivity(intent);
}
}
and main.xml is :
<LinearLayout
android:layout_height="wrap_content" android:orientation="vertical" android:layout_width="250px">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Name: " />
<TextView android:id="#+id/contact_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Phone: " />
<TextView android:id="#+id/contact_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
I thought to add the field to DB. but i was unable to know how to change the image with code. can any one provide me an example for drawing image with code and change it based on a condition at runtime.
I've done the same thing in my application (however I didn't use a cursoradapter but a custom adapter, however the logic should be the same).
What I needed to get this working was to include a field in the db which specifies wheater or not the field is processed (or some field deciding which image to show). Then you need to bind your images address to that field. I don't know if you can do this with the simplecursoradapter, or if you need to implement your own though.
Then, when a user clicks an item you just set that item as processed in the db, and you tell your adapter that it has been updated.