这是我尝试打开从 base64 字符串创建的文件的代码：
var decodedBytes = Base64.decode(filtered.first().contentsB64String, Base64.NO_WRAP)
var ext = FilenameUtils.getExtension(commonName)
fileTemporary = File(Environment.getExternalStorageDirectory().toString() + "/xelion/xelion_temp." + ext)
if (fileTemporary != null) {
if (!fileTemporary!!.exists()) {
fileTemporary?.createNewFile()
}
FileUtils.writeByteArrayToFile(fileTemporary, decodedBytes)
var intent = Intent(Intent.ACTION_VIEW)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
var uri = Uri.fromFile(fileTemporary)
if (Build.VERSION.SDK_INT >= 24) {
uri = Uri.parse(fileTemporary!!.getPath())
}
intent.setDataAndType(uri, filtered.first().mimeType)
activity!!.startActivity(intent)
}
我也试过这个，但我仍然得到同样的错误：
fun openFile(url: Uri) {
var intent = Intent(Intent.ACTION_VIEW)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
if (url.toString().contains(".doc") || url.toString().contains(".docx")) {
// Word document
intent.setDataAndType(url, "application/msword")
} else if (url.toString().contains(".pdf")) {
// PDF file
intent.setDataAndType(url, "application/pdf")
} else if (url.toString().contains(".ppt") || url.toString().contains(".pptx")) {
// Powerpoint file
intent.setDataAndType(url, "application/vnd.ms-powerpoint")
} else if (url.toString().contains(".xls") || url.toString().contains(".xlsx")) {
// Excel file
intent.setDataAndType(url, "application/vnd.ms-excel")
} else if (url.toString().contains(".zip") || url.toString().contains(".rar")) {
// WAV audio file
intent.setDataAndType(url, "application/x-wav")
} else if (url.toString().contains(".rtf")) {
// RTF file
intent.setDataAndType(url, "application/rtf")
} else if (url.toString().contains(".wav") || url.toString().contains(".mp3")) {
// WAV audio file
intent.setDataAndType(url, "audio/x-wav")
} else if (url.toString().contains(".gif")) {
// GIF file
intent.setDataAndType(url, "image/gif")
} else if (url.toString().contains(".jpg") || url.toString().contains(".jpeg") || url.toString().contains(".png")) {
// JPG file
intent.setDataAndType(url, "image/jpeg")
} else if (url.toString().contains(".txt")) {
// Text file
intent.setDataAndType(url, "text/plain")
} else if (url.toString().contains(".3gp") || url.toString().contains(".mpg") || url.toString().contains(".mpeg") || url.toString().contains(".mpe") || url.toString().contains(".mp4") || url.toString().contains(".avi")) {
// Video files
intent.setDataAndType(url, "video/*")
} else {
//if you want you can also define the intent type for any other file
//additionally use else clause below, to manage other unknown extensions
//in this case, Android will show all applications installed on the device
//so you can choose which application to use
intent.setDataAndType(url, "*/*")
}
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
activity!!.startActivity(intent)
}
错误：
No Activity found to handle Intent { act=android.intent.action.VIEW dat=/storage/emulated/0/xelion/xelion_temp.txt typ=text/plain flg=0x10000001 }