com.xiaomi.market.sdk

Class LazyFileProvider

java.lang.Object

android.content.ContentProvider

com.xiaomi.market.sdk.LazyFileProvider

All Implemented Interfaces:

android.content.ComponentCallbacks, android.content.ComponentCallbacks2

public class LazyFileProvider
extends android.content.ContentProvider

Created by zhangjiahao on 17-12-6.

Nested Class Summary

Nested classes/interfaces inherited from class android.content.ContentProvider

android.content.ContentProvider.PipeDataWriter<T>

Field Summary

Fields inherited from interface android.content.ComponentCallbacks2

TRIM_MEMORY_BACKGROUND, TRIM_MEMORY_COMPLETE, TRIM_MEMORY_MODERATE, TRIM_MEMORY_RUNNING_CRITICAL, TRIM_MEMORY_RUNNING_LOW, TRIM_MEMORY_RUNNING_MODERATE, TRIM_MEMORY_UI_HIDDEN

Constructor Summary

Constructors

Constructor and Description
LazyFileProvider()

Method Summary

Modifier and Type	Method and Description
void	attachInfo(android.content.Context context, android.content.pm.ProviderInfo info) After the FileProvider is instantiated, this method is called to provide the system with information about the provider.
int	delete(android.net.Uri uri, java.lang.String selection, java.lang.String[] selectionArgs) Deletes the file associated with the specified content URI, as returned by getUriForFile().
java.lang.String	getType(android.net.Uri uri) Returns the MIME type of a content URI returned by getUriForFile().
static android.net.Uri	getUriForFile(android.content.Context context, java.lang.String authority, java.io.File file) Return a content URI for a given File.
android.net.Uri	insert(android.net.Uri uri, android.content.ContentValues values) By default, this method throws an UnsupportedOperationException.
boolean	onCreate() The default FileProvider implementation does not need to be initialized.
android.os.ParcelFileDescriptor	openFile(android.net.Uri uri, java.lang.String mode) By default, FileProvider automatically returns the ParcelFileDescriptor for a file associated with a content:// Uri.
android.database.Cursor	query(android.net.Uri uri, java.lang.String[] projection, java.lang.String selection, java.lang.String[] selectionArgs, java.lang.String sortOrder) Use a content URI returned by getUriForFile() to get information about a file managed by the FileProvider.
int	update(android.net.Uri uri, android.content.ContentValues values, java.lang.String selection, java.lang.String[] selectionArgs) By default, this method throws an UnsupportedOperationException.

Methods inherited from class android.content.ContentProvider

applyBatch, bulkInsert, call, canonicalize, dump, getCallingPackage, getContext, getPathPermissions, getReadPermission, getStreamTypes, getWritePermission, isTemporary, onConfigurationChanged, onLowMemory, onTrimMemory, openAssetFile, openAssetFile, openFile, openFileHelper, openPipeHelper, openTypedAssetFile, openTypedAssetFile, query, setPathPermissions, setReadPermission, setWritePermission, shutdown, uncanonicalize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LazyFileProvider

public LazyFileProvider()

Method Detail

onCreate

public boolean onCreate()

The default FileProvider implementation does not need to be initialized. If you want to override this method, you must provide your own subclass of FileProvider.

Specified by:

onCreate in class android.content.ContentProvider

attachInfo

public void attachInfo(android.content.Context context,
                       android.content.pm.ProviderInfo info)

After the FileProvider is instantiated, this method is called to provide the system with information about the provider.

Overrides:

attachInfo in class android.content.ContentProvider

Parameters:

context - A Context for the current component.

info - A ProviderInfo for the new provider.

getUriForFile

public static android.net.Uri getUriForFile(android.content.Context context,
                                            java.lang.String authority,
                                            java.io.File file)

Return a content URI for a given File. Specific temporary permissions for the content URI can be set with Context.grantUriPermission(String, Uri, int), or added to an Intent by calling setData() and then setFlags(); in both cases, the applicable flags are Intent.FLAG_GRANT_READ_URI_PERMISSION and Intent.FLAG_GRANT_WRITE_URI_PERMISSION. A FileProvider can only return a content Uri for file paths defined in their <paths> meta-data element. See the Class Overview for more information.

Parameters:

context - A Context for the current component.

authority - The authority of a android.support.v4.content.FileProvider defined in a <provider> element in your app's manifest.

file - A File pointing to the filename for which you want a content Uri.

Returns:

A content URI for the file.

Throws:

java.lang.IllegalArgumentException - When the given File is outside the paths supported by the provider.

query

public android.database.Cursor query(android.net.Uri uri,
                                     java.lang.String[] projection,
                                     java.lang.String selection,
                                     java.lang.String[] selectionArgs,
                                     java.lang.String sortOrder)

Use a content URI returned by getUriForFile() to get information about a file managed by the FileProvider. FileProvider reports the column names defined in OpenableColumns:

• OpenableColumns.DISPLAY_NAME
• OpenableColumns.SIZE

For more information, see ContentProvider.query().

Specified by:

query in class android.content.ContentProvider

Parameters:

uri - A content URI returned by getUriForFile(android.content.Context, java.lang.String, java.io.File).

projection - The list of columns to put into the Cursor. If null all columns are included.

selection - Selection criteria to apply. If null then all data that matches the content URI is returned.

selectionArgs - An array of String, containing arguments to bind to the selection parameter. The query method scans selection from left to right and iterates through selectionArgs, replacing the current "?" character in selection with the value at the current position in selectionArgs. The values are bound to selection as String values.

sortOrder - A String containing the column name(s) on which to sort the resulting Cursor.

Returns:

A Cursor containing the results of the query.

getType

public java.lang.String getType(android.net.Uri uri)

Returns the MIME type of a content URI returned by getUriForFile().

Specified by:

getType in class android.content.ContentProvider

Parameters:

uri - A content URI returned by getUriForFile().

Returns:

If the associated file has an extension, the MIME type associated with that extension; otherwise application/octet-stream.

insert

public android.net.Uri insert(android.net.Uri uri,
                              android.content.ContentValues values)

By default, this method throws an UnsupportedOperationException. You must subclass FileProvider if you want to provide different functionality.

Specified by:

insert in class android.content.ContentProvider

update

public int update(android.net.Uri uri,
                  android.content.ContentValues values,
                  java.lang.String selection,
                  java.lang.String[] selectionArgs)

By default, this method throws an UnsupportedOperationException. You must subclass FileProvider if you want to provide different functionality.

Specified by:

update in class android.content.ContentProvider

delete

public int delete(android.net.Uri uri,
                  java.lang.String selection,
                  java.lang.String[] selectionArgs)

Deletes the file associated with the specified content URI, as returned by getUriForFile(). Notice that this method does not throw an IOException; you must check its return value.

Specified by:

delete in class android.content.ContentProvider

Parameters:

uri - A content URI for a file, as returned by getUriForFile().

selection - Ignored. Set to null.

selectionArgs - Ignored. Set to null.

Returns:

1 if the delete succeeds; otherwise, 0.

openFile

public android.os.ParcelFileDescriptor openFile(android.net.Uri uri,
                                                java.lang.String mode)
                                         throws java.io.FileNotFoundException

By default, FileProvider automatically returns the ParcelFileDescriptor for a file associated with a content:// Uri. To get the ParcelFileDescriptor, call ContentResolver.openFileDescriptor.

To override this method, you must provide your own subclass of FileProvider.

Overrides:

openFile in class android.content.ContentProvider

Parameters:

uri - A content URI associated with a file, as returned by getUriForFile().

mode - Access mode for the file. May be "r" for read-only access, "rw" for read and write access, or "rwt" for read and write access that truncates any existing file.

Returns:

A new ParcelFileDescriptor with which you can access the file.

Throws:

java.io.FileNotFoundException