android.content包-------AsyncQueryHandler

朴灿烈づ我的快乐病毒、 2023-10-16 18:38 15阅读 0赞

类介绍：

AsyncQueryHandler类实现ContentResolver查询的异步处理

相关子类和构造方法介绍：

![Center][]

AsyncQueryHandler.WorkerArgs：AsyncQueryHandler.的内部类，填充相关相关参数

![Center 1][]

AsyncQueryHandler.WorkerHandler：AsyncQueryHandler的内部类处理ContentResolver的相关数据信息

![Center 2][]

重要方法：

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[cancelOperation][](int token)：取消还未执行的任务

[handleMessage][]([Message][] msg)：子类必须实现的方法

[startDelete][](int token,[Object][] cookie, [ Uri][Uri] uri, [ String][String] selection, [ String\[\]][String] selectionArgs)：异步删除方法

[startInsert][](int token,[Object][] cookie, [ Uri][Uri] uri, [ ContentValues][ContentValues] initialValues)：异步插入方法

[startQuery][](int token, [ Object][Object] cookie, [ Uri][Uri] uri, [ String\[\]][String] projection, [ String][String] selection, [ String\[\]][String] selectionArgs, [ String][String] orderBy)：异步查询方法

[startUpdate][](int token, [ Object][Object] cookie, [ Uri][Uri] uri, [ ContentValues][ContentValues] values, [ String][String] selection, [ String\[\]][String] selectionArgs)：异步更改方法

[Center]: https://img-blog.csdn.net/20131101164100671?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20131101165121109?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 2]: https://img-blog.csdn.net/20131101165316921?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 3]: https://img-blog.csdn.net/20131101164209000?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[cancelOperation]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#cancelOperation%28int%29
[handleMessage]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#handleMessage%28android.os.Message%29
[Message]: http://developer.android.com/reference/android/os/Message.html
[startDelete]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#startDelete%28int,%20java.lang.Object,%20android.net.Uri,%20java.lang.String,%20java.lang.String[]%29
[Object]: http://developer.android.com/reference/java/lang/Object.html
[Uri]: http://developer.android.com/reference/android/net/Uri.html
[String]: http://developer.android.com/reference/java/lang/String.html
[startInsert]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#startInsert%28int,%20java.lang.Object,%20android.net.Uri,%20android.content.ContentValues%29
[ContentValues]: http://developer.android.com/reference/android/content/ContentValues.html
[startQuery]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#startQuery%28int,%20java.lang.Object,%20android.net.Uri,%20java.lang.String[],%20java.lang.String,%20java.lang.String[],%20java.lang.String%29
[startUpdate]: http://developer.android.com/reference/android/content/AsyncQueryHandler.html#startUpdate%28int,%20java.lang.Object,%20android.net.Uri,%20android.content.ContentValues,%20java.lang.String,%20java.lang.String[]%29