java.lang.Object |
↳ |
android.widget.BaseAdapter |
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↳ |
com.google.android.gms.drive.widget.DataBufferAdapter<T> |
Class Overview
A concrete BaseAdapter that is backed by concatenated DataBuffers. The assumptions and
behaviors of this adapter parallel those of the ArrayAdapter:
- that the provided resource id in the simple constructors references a single TextView
- that more complex layouts use constructors taking a field id that references a TextView in
the larger layout resource
- that the objects in the DataBuffer have an appropriate toString() method, which will be used
to populate the TextView
If you need to modify how the objects display in the TextView, override their toString()
method.
In addition, any DataBuffers added to this adapter are managed entirely by this adapter,
including their life cycle. Be sure to call clear()
anywhere you would otherwise close
the data buffers used here, and if you want to manage their life cycles more granularly, you will
need to override the behavior of clear(), as well as add your own management methods to
ensure resources are properly managed within your application.
If you need something other than a single TextView for the data in this adapter, override
getView(int, View, ViewGroup)
to populate and return the type of view you want.
Summary
[Expand]
Inherited Constants |
From interface
android.widget.Adapter
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Public Constructors |
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DataBufferAdapter(Context context, int resource, int textViewResourceId, List<DataBuffer<T>> objects)
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DataBufferAdapter(Context context, int resource, int textViewResourceId)
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DataBufferAdapter(Context context, int resource, List<DataBuffer<T>> objects)
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DataBufferAdapter(Context context, int resource)
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DataBufferAdapter(Context context, int resource, int textViewResourceId, DataBuffer...<T> buffers)
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DataBufferAdapter(Context context, int resource, DataBuffer...<T> buffers)
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Public Constructors
public
DataBufferAdapter
(Context context, int resource, int textViewResourceId, List<DataBuffer<T>> objects)
Parameters |
context |
Context
|
resource |
int
|
textViewResourceId |
int
|
objects |
List
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public
DataBufferAdapter
(Context context, int resource, int textViewResourceId)
Parameters |
context |
Context
|
resource |
int
|
textViewResourceId |
int
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public
DataBufferAdapter
(Context context, int resource, List<DataBuffer<T>> objects)
Parameters |
context |
Context
|
resource |
int
|
objects |
List
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public
DataBufferAdapter
(Context context, int resource)
Parameters |
context |
Context
|
resource |
int
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public
DataBufferAdapter
(Context context, int resource, int textViewResourceId, DataBuffer...<T> buffers)
Parameters |
context |
Context
|
resource |
int
|
textViewResourceId |
int
|
buffers |
DataBuffer
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public
DataBufferAdapter
(Context context, int resource, DataBuffer...<T> buffers)
Parameters |
context |
Context
|
resource |
int
|
buffers |
DataBuffer
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Public Methods
public
void
append
(DataBuffer<T> buffer)
Appends the specified buffer to the end of the adapter.
Parameters |
buffer |
DataBuffer
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public
void
clear
()
Closes and removes all buffers, and so all elements, from the adapter.
public
Context
getContext
()
public
View
getDropDownView
(int position, View convertView, ViewGroup parent)
Parameters |
position |
int
|
convertView |
View
|
parent |
ViewGroup
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public
T
getItem
(int position)
Throws |
CursorIndexOutOfBoundsException |
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public
long
getItemId
(int position)
public
View
getView
(int position, View convertView, ViewGroup parent)
Parameters |
position |
int
|
convertView |
View
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parent |
ViewGroup
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public
void
notifyDataSetChanged
()
This will also re-enable automatic notifications. Pairing this with setNotifyOnChange(boolean)
gives the ability to make a series of changes to the adapter without triggering multiple
notifications at the same time. Use these two methods together to temporarily disable
notifications for the purpose of batching operations on the adapter.
public
void
setDropDownViewResource
(int resource)
Sets the layout resource to create the drop down views.
public
void
setNotifyOnChange
(boolean notifyOnChange)
Control whether methods that change the list (append(DataBuffer)
, clear()
)
automatically call notifyDataSetChanged()
. If set to false, caller must manually call
notifyDataSetChanged() to have the changes reflected in the attached view.
The default is true, and calling notifyDataSetChanged() resets the flag to true. Use this
method if you want to make several changes to the adapter in a row, and don't need the view
to update in between changes. This reduces the processing load for each operation
significantly.
Parameters |
notifyOnChange |
boolean :
if true, modifications to the list will automatically call notifyDataSetChanged()
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