public class

SimpleCursorAdapter

extends ResourceCursorAdapter
java.lang.Object
   ↳ android.widget.BaseAdapter
     ↳ android.widget.CursorAdapter
       ↳ android.widget.ResourceCursorAdapter
         ↳ android.widget.SimpleCursorAdapter

Class Overview

An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file. You can specify which columns you want, which views you want to display the columns, and the XML file that defines the appearance of these views. Binding occurs in two phases. First, if a SimpleCursorAdapter.ViewBinder is available, setViewValue(android.view.View, android.database.Cursor, int) is invoked. If the returned value is true, binding has occured. If the returned value is false and the view to bind is a TextView, setViewText(TextView, String) is invoked. If the returned value is false and the view to bind is an ImageView, setViewImage(ImageView, String) is invoked. If no appropriate binding can be found, an IllegalStateException is thrown. If this adapter is used with filtering, for instance in an AutoCompleteTextView, you can use the SimpleCursorAdapter.CursorToStringConverter and the FilterQueryProvider interfaces to get control over the filtering process. You can refer to convertToString(android.database.Cursor) and runQueryOnBackgroundThread(CharSequence) for more information.

Summary

Nested Classes
public class SimpleCursorAdapter.CursorToStringConverter This class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String. 
public class SimpleCursorAdapter.ViewBinder This class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views. 
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Inherited Constants
From interface android.widget.Adapter
Public Constructors
SimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to)
Constructor.
Public Methods
void bindView(View view, Context context, Cursor cursor)
Binds all of the field names passed into the "to" parameter of the constructor with their corresponding cursor columns as specified in the "from" parameter.
void changeCursor(Cursor c)
Change the underlying cursor to a new cursor.
void changeCursorAndColumns(Cursor c, String[] from, int[] to)
Change the cursor and change the column-to-view mappings at the same time.
CharSequence convertToString(Cursor cursor)
Returns a CharSequence representation of the specified Cursor as defined by the current CursorToStringConverter.
SimpleCursorAdapter.CursorToStringConverter getCursorToStringConverter()
Returns the converter used to convert the filtering Cursor into a String.
int getStringConversionColumn()
Return the index of the column used to get a String representation of the Cursor.
SimpleCursorAdapter.ViewBinder getViewBinder()
Returns the SimpleCursorAdapter.ViewBinder used to bind data to views.
View newDropDownView(Context context, Cursor cursor, ViewGroup parent)
Makes a new drop down view to hold the data pointed to by cursor.
View newView(Context context, Cursor cursor, ViewGroup parent)
Inflates view(s) from the specified XML file.
void setCursorToStringConverter(SimpleCursorAdapter.CursorToStringConverter cursorToStringConverter)
Sets the converter used to convert the filtering Cursor into a String.
void setStringConversionColumn(int stringConversionColumn)
Defines the index of the column in the Cursor used to get a String representation of that Cursor.
void setViewBinder(SimpleCursorAdapter.ViewBinder viewBinder)
Sets the binder used to bind data to views.
void setViewImage(ImageView v, String value)
Called by bindView() to set the image for an ImageView but only if there is no existing ViewBinder or if the existing ViewBinder cannot handle binding to an ImageView.
void setViewText(TextView v, String text)
Called by bindView() to set the text for a TextView but only if there is no existing ViewBinder or if the existing ViewBinder cannot handle binding to an TextView.
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Inherited Methods
From class android.widget.ResourceCursorAdapter
From class android.widget.CursorAdapter
From class android.widget.BaseAdapter
From class java.lang.Object
From interface android.widget.Adapter
From interface android.widget.Filterable
From interface android.widget.ListAdapter
From interface android.widget.SpinnerAdapter

Public Constructors

public SimpleCursorAdapter (Context context, int layout, Cursor c, String[] from, int[] to)

Constructor.

Parameters
context The context where the ListView associated with this SimpleListItemFactory is running
layout resource identifier of a layout file that defines the views for this list item. Thelayout file should include at least those named views defined in "to"
c The database cursor. Can be null if the cursor is not available yet.
from A list of column names representing the data to bind to the UI. Can be null if the cursor is not available yet.
to The views that should display column in the "from" parameter. These should all be TextViews. The first N views in this list are given the values of the first N columns in the from parameter. Can be null if the cursor is not available yet.

Public Methods

public void bindView (View view, Context context, Cursor cursor)

Binds all of the field names passed into the "to" parameter of the constructor with their corresponding cursor columns as specified in the "from" parameter. Binding occurs in two phases. First, if a SimpleCursorAdapter.ViewBinder is available, setViewValue(android.view.View, android.database.Cursor, int) is invoked. If the returned value is true, binding has occured. If the returned value is false and the view to bind is a TextView, setViewText(TextView, String) is invoked. If the returned value is false and the view to bind is an ImageView, setViewImage(ImageView, String) is invoked. If no appropriate binding can be found, an IllegalStateException is thrown.

Parameters
view Existing view, returned earlier by newView
context Interface to application's global information
cursor The cursor from which to get the data. The cursor is already moved to the correct position.
Throws
IllegalStateException if binding cannot occur
See Also

public void changeCursor (Cursor c)

Change the underlying cursor to a new cursor. If there is an existing cursor it will be closed.

Parameters
c the new cursor to be used

public void changeCursorAndColumns (Cursor c, String[] from, int[] to)

Change the cursor and change the column-to-view mappings at the same time.

Parameters
c The database cursor. Can be null if the cursor is not available yet.
from A list of column names representing the data to bind to the UI. Can be null if the cursor is not available yet.
to The views that should display column in the "from" parameter. These should all be TextViews. The first N views in this list are given the values of the first N columns in the from parameter. Can be null if the cursor is not available yet.

public CharSequence convertToString (Cursor cursor)

Returns a CharSequence representation of the specified Cursor as defined by the current CursorToStringConverter. If no CursorToStringConverter has been set, the String conversion column is used instead. If the conversion column is -1, the returned String is empty if the cursor is null or Cursor.toString().

Parameters
cursor the Cursor to convert to a CharSequence
Returns
  • a non-null CharSequence representing the cursor

public SimpleCursorAdapter.CursorToStringConverter getCursorToStringConverter ()

Returns the converter used to convert the filtering Cursor into a String.

Returns
See Also

public int getStringConversionColumn ()

Return the index of the column used to get a String representation of the Cursor.

Returns
  • a valid index in the current Cursor or -1
See Also

public SimpleCursorAdapter.ViewBinder getViewBinder ()

Returns the SimpleCursorAdapter.ViewBinder used to bind data to views.

Returns
  • a ViewBinder or null if the binder does not exist
See Also

public View newDropDownView (Context context, Cursor cursor, ViewGroup parent)

Makes a new drop down view to hold the data pointed to by cursor.

Parameters
context Interface to application's global information
cursor The cursor from which to get the data. The cursor is already moved to the correct position.
parent The parent to which the new view is attached to
Returns
  • the newly created view.

public View newView (Context context, Cursor cursor, ViewGroup parent)

Inflates view(s) from the specified XML file.

Parameters
context Interface to application's global information
cursor The cursor from which to get the data. The cursor is already moved to the correct position.
parent The parent to which the new view is attached to
Returns
  • the newly created view.

public void setCursorToStringConverter (SimpleCursorAdapter.CursorToStringConverter cursorToStringConverter)

Sets the converter used to convert the filtering Cursor into a String.

Parameters
cursorToStringConverter the Cursor to String converter, or null to remove the converter
See Also

public void setStringConversionColumn (int stringConversionColumn)

Defines the index of the column in the Cursor used to get a String representation of that Cursor. The column is used to convert the Cursor to a String only when the current CursorToStringConverter is null.

Parameters
stringConversionColumn a valid index in the current Cursor or -1 to use the default conversion mechanism
See Also

public void setViewBinder (SimpleCursorAdapter.ViewBinder viewBinder)

Sets the binder used to bind data to views.

Parameters
viewBinder the binder used to bind data to views, can be null to remove the existing binder
See Also

public void setViewImage (ImageView v, String value)

Called by bindView() to set the image for an ImageView but only if there is no existing ViewBinder or if the existing ViewBinder cannot handle binding to an ImageView. By default, the value will be treated as an image resource. If the value cannot be used as an image resource, the value is used as an image Uri. Intended to be overridden by Adapters that need to filter strings retrieved from the database.

Parameters
v ImageView to receive an image
value the value retrieved from the cursor

public void setViewText (TextView v, String text)

Called by bindView() to set the text for a TextView but only if there is no existing ViewBinder or if the existing ViewBinder cannot handle binding to an TextView. Intended to be overridden by Adapters that need to filter strings retrieved from the database.

Parameters
v TextView to receive text
text the text to be set for the TextView