Android-关闭后无法保存带有Intent的PDF文档 [英] Android - Open PDF Doc with Intent is not saving after close
问题描述
我面临的问题是,当尝试将更改保存到使用此URI打开的PDF文档中时 content://xx.xxx.xxx.fileprovider/external/Download/Sync/FileName.pdf ,关闭文档后,我所做的任何更改均未保存.但是,当我使用示例应用程序来创建另一种URI格式时,例如 content://xx.xxx.xxx.file_provider/file%253A%252F%252F%252Fstorage%252Femulated%252F0%252FDownload%252FSync%252FFileName% 252F%252FEYV.pdf 更改已成功保存.我也尝试过使用 ACTION_EDIT
the problem I'm facing is that when trying to save changes to a PDF document opened with this URI content://xx.xxx.xxx.fileprovider/external/Download/Sync/FileName.pdf, any change I make is not saving after closing the document. But when I use sample apps that create another format of URI like this one content://xx.xxx.xxx.file_provider/file%253A%252F%252F%252Fstorage%252Femulated%252F0%252FDownload%252FSync%252FFileName%252F%252FEYV.pdf the changes are saved successfully. I have also tried with ACTION_EDIT
val file = File(fileModel.path)
val uri = if (Build.VERSION.SDK_INT >= 24) {
FileProvider.getUriForFile(activity?.applicationContext!!, "$APP_ID.fileprovider", file)
} else {
Uri.fromFile(file)
}
val mime = activity?.applicationContext!!.contentResolver.getType(uri)
val pdfIntent = Intent(Intent.ACTION_VIEW)
pdfIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY)
pdfIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
pdfIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
pdfIntent.setDataAndType(uri, mime)
val packageManager = activity?.applicationContext?.packageManager
val activities = packageManager!!.queryIntentActivities(pdfIntent, PackageManager.MATCH_DEFAULT_ONLY)
for (resolvedIntentInfo in activities) {
val packageName = resolvedIntentInfo.activityInfo.packageName
activity?.applicationContext?.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION)
activity?.applicationContext?.grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
}
if (pdfIntent.resolveActivity(activity!!.packageManager) != null) {
//startActivity(Intent.createChooser(pdfIntent, "Open"))
startActivity(pdfIntent)
}
推荐答案
请检查此文档,并告诉我是否有帮助.
Please check this documentation and let me know if it helps.
// Request code for selecting a PDF document.
const val PICK_PDF_FILE = 2
fun openFile(pickerInitialUri: uri) {
val intent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
addCategory(Intent.CATEGORY_OPENABLE)
type = "application/pdf"
// Optionally, specify a URI for the file that should appear in the
// system file picker when it loads.
putExtra(DocumentsContract.EXTRA_INITIAL_URI, pickerInitialUri)
}
startActivityForResult(intent, PICK_PDF_FILE)
}
此外,用于编辑任何文档此链接可能会有帮助.
Also, for editing any document this link might help.
val contentResolver = applicationContext.contentResolver
private fun alterDocument(uri: Uri) {
try {
contentResolver.openFileDescriptor(uri, "w")?.use {
FileOutputStream(it.fileDescriptor).use {
it.write(
("Overwritten at ${System.currentTimeMillis()}\n")
.toByteArray()
)
}
}
} catch (e: FileNotFoundException) {
e.printStackTrace()
} catch (e: IOException) {
e.printStackTrace()
}
}
这篇关于Android-关闭后无法保存带有Intent的PDF文档的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!