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(1) convert data in the phone book to a file in vCard formatVoid CXXX: exportphonebook (){RFS filesession;User: leaveiferror (filesession. Connect (); // connect to the file serverCleanupclosepushl (filesession );Ccontactdatabase * contactdb =

(1) convert data in the phone book to a file in vCard format Void CXXX: exportphonebook (){RFS filesession;User: leaveiferror (filesession. Connect (); // connect to the file serverCleanupclosepushl (filesession );Ccontactdatabase * contactdb =

PHP generates a QR code. Parameter description: chtqr: Required parameter, fixed value qr, indicating to generate the two-dimensional code chswidthxheight: Required parameter, generating the two-dimensional code size, unit: Pixel, currently

Use google api to generate a QR code business card Two-dimensional Barcode/two-dimensional Barcode can be divided into stacked/row-layout two-dimensional barcode and matrix two-dimensional barcode. Stacked/row-lined two-dimensional bar codes are

Use googleapi to generate a QR code business card example. Two-dimensional barcode can be divided into stacked two-dimensional barcode and matrix two-dimensional barcode. Stacked two-dimensional bar codes are stacked by one-dimensional code blocks

Two-dimensional barcode/two-dimensional barcode can be divided into stacked/row-layout two-dimensional barcode and matrix two-dimensional barcode. Stacked/row-lined two-dimensional bar codes are stacked by one-dimensional bar codes with multiple

Two-dimensional barcode/Two-D code can be divided into stacked/row-type two-dimensional barcode and matrix two-dimensional barcode. Stacked/row-type two-dimensional barcode form is a multiple-line short section of one-dimensional bar code stacked;

Two-dimensional barcode/Two-D code can be divided into stacked/row-type two-dimensional barcode and matrix two-dimensional barcode. Stacked/row-type two-dimensional barcode form is composed of a multi-line short-cut one-dimensional bar code stacked,

1. What is ContentProviderThe content provider, a layer of abstraction for all data access, provides a unified interface for data access. It has the following advantages: A. Abstraction of data, providing uniform access to data for all components

cht=qr：必要参数，固定值，表明要生成二维码 chs=width>xheight> : necessary parameters, generate two-dimensional code size, units are pixels, the current generated QR code is square, so the two width and height values are set to the same value chl=data> : The necessary