anshuman61 commented on issue #426:
URL:
https://github.com/apache/cordova-plugin-file/issues/426#issuecomment-906139050
Actually i have the same problem while i upgraded to API 30. I got error
code 9 also. As google upgraded its android protocol set for storage we have to
use "scoped storage".
1. In my application i have to capture image, then i have to compress using
Javascript image compressors (usually gives better quality than the
"`cordova-plugin-camera`" compressors and have more flexibility) and have to
write compressed files using "`cordova-plugin-file`" to storage.
2. Previously i am using "`LocalFileSystem.PERSISTENT`" and with API 30 i
couldn't access that region of my file system due to restrictions imposed.
Example:-
`window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function (fs) {
console.log('file system open: ' +
fs.name);fs.root.getFile("newPersistentFile.txt", { create: true, exclusive:
false }, function (fileEntry) {console.log("fileEntry is file?" +
fileEntry.isFile.toString());
// fileEntry.name == 'someFile.txt'
// fileEntry.fullPath == '/someFile.txt'
writeFile(fileEntry, null);}, onErrorCreateFile); }, onErrorLoadFs);`
3. Then i changed "`LocalFileSystem.PERSISTENT`" with
"`cordova.file.dataDirectory`" and it worked. Its also logically correct as per
the restrictions imposed now a days.
Example :-
`window.resolveLocalFileSystemURL(cordova.file.dataDirectory, function
(dirEntry) {
console.log('file system open: ' + dirEntry.name);
var isAppend = true;
createFile(dirEntry, "fileToAppend.txt", isAppend);
}, onErrorLoadFs);`
This example can also be used to create new files, if you provide unique
file name each time. Like below.
Example :-
`
window.resolveLocalFileSystemURL(cordova.file.dataDirectory, function(fs) {
createFile(fs, outputfilename);
function createFile(dirEntry, fileName, isAppend) {
// Creates a new file or returns the file if it
already exists (use unique file name each time) .
dirEntry.getFile(fileName, { create: true,
exclusive: false }, function(fileEntry) {writeFile(fileEntry, result);
}, function(err) {
console.log(err);
});}function writeFile(fileEntry, dataObj) {
// Create a FileWriter object for our FileEntry
(log.txt).
fileEntry.createWriter(function(fileWriter)
{fileWriter.onwriteend = function() {console.log("File written
successfully...");console.log(fileEntry); };fileWriter.onerror = function(e) {
console.log("Failed to write file: " +
e.toString());
};// If data object is not passed in,
// create a new Blob instead.
if (!dataObj) {
dataObj = new Blob(['some file data'], {
type: 'text/plain' });
}fileWriter.write(dataObj);
});
} }, function(error) { console.log(error); });`
Correct me if something i missed. Thank you all.
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