https:\/\/rogerkeays.com\/simple-android-file-chooser<\/a>.<\/p>\nMoja implementacja wygl\u0105da w nast\u0119puj\u0105cy spos\u00f3b:<\/p>\n
class FileChooser(val activity: Activity, val fileListener: FileSelectedListener, val maxFileSize: Double) {\r\n private lazy val messageMaker = wire(classOf[MessageMaker])\r\n private val parentDir = \"..\"\r\n private val mb = 1024.0 * 1024.0\r\n private val dialog = new Dialog(activity)\r\n private val list = new ListView(activity)\r\n private var currentPath: File = _\r\n\r\n list.setOnItemClickListener(new AdapterView.OnItemClickListener() {\r\n override def onItemClick(parent: AdapterView[_], view: View, position: Int, id: Long): Unit = {\r\n val fileChosen: String = list.getItemAtPosition(position).asInstanceOf[String]\r\n val chosenFile: File = getChosenFile(fileChosen)\r\n if (chosenFile.isDirectory) {\r\n refresh(chosenFile)\r\n }\r\n else {\r\n val sizeInMB: Double = chosenFile.length \/ mb\r\n if (sizeInMB > maxFileSize) {\r\n messageMaker.info(\"Selected file is too large\")\r\n }\r\n else {\r\n if (fileListener != null) {\r\n fileListener.fileSelected(chosenFile)\r\n }\r\n dialog.dismiss()\r\n }\r\n }\r\n }\r\n })\r\n dialog.setContentView(list)\r\n dialog.getWindow.setLayout(MATCH_PARENT, MATCH_PARENT)\r\n refresh(Environment.getExternalStorageDirectory)\r\n\r\n def showDialog() {\r\n dialog.show()\r\n }\r\n\r\n \/**\r\n * Sort, filter and display the files for the given path.\r\n *\/\r\n private def refresh(path: File) {\r\n this.currentPath = path\r\n if (path.exists) {\r\n val dirs: Array[File] = path.listFiles(new FileFilter() {\r\n def accept(file: File): Boolean = {\r\n file.isDirectory && file.canRead\r\n }\r\n })\r\n val files: Array[File] = path.listFiles(new FileFilter() {\r\n def accept(file: File): Boolean = {\r\n !file.isDirectory && file.canRead\r\n }\r\n })\r\n dirs.sortWith(_.getName > _.getName)\r\n files.sortWith(_.getName > _.getName)\r\n\r\n \/\/ convert to an array\r\n val i: Int = 0\r\n var fileList = ArrayBuffer[String]()\r\n\r\n if (path.getParentFile != null) {\r\n fileList += parentDir\r\n }\r\n dirs.foreach(d => fileList += d.getName)\r\n files.foreach(f => fileList += f.getName)\r\n\r\n \/\/ refresh the user interface\r\n dialog.setTitle(currentPath.getPath)\r\n list.setAdapter(new ArrayAdapter(activity, android.R.layout.simple_list_item_1, fileList.toArray) {\r\n override def getView(pos: Int, view: View, parent: ViewGroup): View = {\r\n val superView = super.getView(pos, view, parent)\r\n superView.asInstanceOf[TextView].setSingleLine(true)\r\n superView\r\n }\r\n })\r\n }\r\n }\r\n\r\n private def getChosenFile(fileChosen: String): File = {\r\n if (fileChosen == parentDir) {\r\n currentPath.getParentFile\r\n }\r\n else {\r\n new File(currentPath, fileChosen)\r\n }\r\n }\r\n}<\/pre>\ntrait FileSelectedListener {\r\n def fileSelected(file: File)\r\n}<\/pre>\nG\u0142\u00f3wn\u0105 zmian\u0105 (oczywi\u015bcie poza napisaniem tego w j\u0119zyku Scala) jest dodanie ograniczenia na maksymaln\u0105 wielko\u015b\u0107 pliku. Po wyborze pliku, je\u017celi jego rozmiar przekracza ustawiony maksymalny rozmiar to zostaje wy\u015bwietlony komunkat z informacj\u0105, a plik nie zostaje dodany.<\/p>\n","protected":false},"excerpt":{"rendered":"
API Androida niestety nie dostarcza nam w standardzie \u017cadnego mechanizmu umo\u017cliwiaj\u0105cego wyb\u00f3r pliku z systemu plik\u00f3w. W takim przypadku nie pozostaje nam nic innego jak zaimplementowa\u0107 to samemu…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,6],"tags":[5,3,4],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-daj-sie-poznac","category-simple-document-manager","tag-android","tag-dajsiepoznac","tag-sdm"],"yoast_head":"\n
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