ContentProviderClient
public class ContentProviderClient
extends Object
implements AutoCloseable
The public interface object used to interact with a specific ContentProvider
.
Instances can be obtained by calling acquireContentProviderClient(Uri)
or acquireUnstableContentProviderClient(Uri)
. Instances must be released using close()
in order to indicate to the system that the underlying ContentProvider
is no longer needed and can be killed to free up resources.
Note that you should generally create a new ContentProviderClient instance for each thread that will be performing operations. Unlike ContentResolver
, the methods here such as query(Uri, String[], String, String[], String)
and openFile(Uri, String)
are not thread safe -- you must not call close()
on the ContentProviderClient those calls are made from until you are finished with the data they have returned.
Summary
Public methods |
ContentProviderResult[] |
applyBatch(ArrayList<ContentProviderOperation> operations) See ContentProvider.applyBatch |
int |
bulkInsert(Uri url, ContentValues[] initialValues) See ContentProvider.bulkInsert |
Bundle |
call(String method, String arg, Bundle extras) See call(String, String, Bundle) |
final Uri |
canonicalize(Uri url) See canonicalize(Uri) |
void |
close() Closes this client connection, indicating to the system that the underlying ContentProvider is no longer needed. |
int |
delete(Uri url, String selection, String[] selectionArgs) See ContentProvider.delete |
ContentProvider |
getLocalContentProvider() Get a reference to the ContentProvider that is associated with this client. |
String[] |
getStreamTypes(Uri url, String mimeTypeFilter) See ContentProvider.getStreamTypes |
String |
getType(Uri url) See ContentProvider.getType |
Uri |
insert(Uri url, ContentValues initialValues) See ContentProvider.insert |
AssetFileDescriptor |
openAssetFile(Uri url, String mode, CancellationSignal signal) See ContentProvider.openAssetFile . |
AssetFileDescriptor |
openAssetFile(Uri url, String mode) See ContentProvider.openAssetFile . |
ParcelFileDescriptor |
openFile(Uri url, String mode, CancellationSignal signal) See ContentProvider.openFile . |
ParcelFileDescriptor |
openFile(Uri url, String mode) See ContentProvider.openFile . |
final AssetFileDescriptor |
openTypedAssetFileDescriptor(Uri uri, String mimeType, Bundle opts, CancellationSignal signal) See ContentProvider.openTypedAssetFile |
final AssetFileDescriptor |
openTypedAssetFileDescriptor(Uri uri, String mimeType, Bundle opts) See ContentProvider.openTypedAssetFile |
Cursor |
query(Uri url, String[] projection, String selection, String[] selectionArgs, String sortOrder) See ContentProvider.query |
Cursor |
query(Uri url, String[] projection, String selection, String[] selectionArgs, String sortOrder, CancellationSignal cancellationSignal) See ContentProvider.query |
boolean |
release() This method was deprecated in API level 24. replaced by close() . |
final Uri |
uncanonicalize(Uri url) See uncanonicalize(Uri) |
int |
update(Uri url, ContentValues values, String selection, String[] selectionArgs) See ContentProvider.update |
Protected methods |
void |
finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
Inherited methods |
From class java.lang.Object
Object |
clone() Creates and returns a copy of this object. |
boolean |
equals(Object obj) Indicates whether some other object is "equal to" this one. |
void |
finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
final Class<?> |
getClass() Returns the runtime class of this Object . |
int |
hashCode() Returns a hash code value for the object. |
final void |
notify() Wakes up a single thread that is waiting on this object's monitor. |
final void |
notifyAll() Wakes up all threads that are waiting on this object's monitor. |
String |
toString() Returns a string representation of the object. |
final void |
wait(long millis, int nanos) Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed. |
final void |
wait(long millis) Causes the current thread to wait until either another thread invokes the notify() method or the notifyAll() method for this object, or a specified amount of time has elapsed. |
final void |
wait() Causes the current thread to wait until another thread invokes the notify() method or the notifyAll() method for this object. |
|
From interface java.lang.AutoCloseable
abstract void |
close() Closes this resource, relinquishing any underlying resources. |
|
Public methods
close
void close ()
Closes this client connection, indicating to the system that the underlying ContentProvider
is no longer needed.
getLocalContentProvider
ContentProvider getLocalContentProvider ()
Get a reference to the ContentProvider
that is associated with this client. If the ContentProvider
is running in a different process then null will be returned. This can be used if you know you are running in the same process as a provider, and want to get direct access to its implementation details.
release
boolean release ()
This method was deprecated in API level 24.
replaced by close()
.
Protected methods
finalize
void finalize ()
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize
method to dispose of system resources or to perform other cleanup.
The general contract of finalize
is that it is invoked if and when the JavaTM virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize
method may take any action, including making this object available again to other threads; the usual purpose of finalize
, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.
The finalize
method of class Object
performs no special action; it simply returns normally. Subclasses of Object
may override this definition.
The Java programming language does not guarantee which thread will invoke the finalize
method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.
After the finalize
method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.
The finalize
method is never invoked more than once by a Java virtual machine for any given object.
Any exception thrown by the finalize
method causes the finalization of this object to be halted, but is otherwise ignored.