(The iconFile source code instance is used to determine the action of the icon being clicked, the basic key to operating the touch screen phone, use the customized MyAdapter to transfer data to the ListActivity, set the action to be taken when the ListItem is clicked, run getFileDir() if it is a folder, run openFile() if it is a file, call getMIMEType() to obtain the MimeType, set the file and MimeType of the intent, and determine the MimeType of the file, if it cannot be opened directly, The software list will pop up for the user to select. Variable declaration: items: the name of the register display, paths: the path of the register file, and rootPath: the starting directory.)
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