breautek
commented
1 year ago The folder I'm reading from is the Downloads folder of my Internal Storage.
Are you sure you don't mean external storage?
Android, Internal Storage refers to to the storage medium guaranteed to be on the device, it usually contains the app install, and the data partition is private to the app only.
External Storage on the other hand may or may not be on the device. If the device has a physical removable storage, like an sdcard, then external storage will be that storage medium, but android also emulates external storage for devices that either don't have an attached storage medium or just plainly doesn't support one. The Download/ directory is found on the External Storage medium. It may have a path such as /sdcard/Download/or /storage/emulated/0/Download.
If the latter, then it's bit of a known issue unfortunately. As of API 30, Scoped Storage rules are fully enforced and there is a caveat on API 29 devices which I'll explain a bit later.
What is Scoped Storage
Scoped Storage is a privacy-focused storage system introduced by Android. It applies to External Storage medium and apps no longer have broad access to the external storage. WRITE_EXTERNAL_STORAGE no longer gives any permission, instead apps may freely read and write to the external storage. However they can only read and write to files that the app has created. If a file already exists but was created from from App A, then App B cannot read or write to that file using the Filesystem API.
Natively to gain read & write access to these files, there is a non-filesystem API called the MediaStore API. The owner of the file must implement a file provider service so it can grant permission to a third-party app trying to read or write to it. I want to emphasize that this API isn't filesystem-like at all so it will be difficult to treat it as such which is why it hasn't really been addressed or resolved in this plugin. For example, you cannot progrommatically list or view the contents of a directory (you can but it will be filtered to only files owned/created by your app) and instead the MediaStore will open the system's file picker and the user may choose the file they want to open.
I believe with the READ_EXTERNAL_STORAGE, some media is granted for reads even if they aren't owned by your app, but that doesn't include Document files. Starting API 33+, there will be 3 new permission replacing READ_EXTERNAL_STORAGE, but likewise, those 3 permissions are only for specific media types: video, audio, and images. Document files must go through the app permission grant system through the media store API, and app that owns the file must implement a file provider to grant permission to third-party apps.
Additionally, specificially on API 29 devices which is when Scoped Storage was first introduced (but while targeting API 29, it could be opted out, which is not possible today if you intend to deploy to Google Play store). API 29 devices does not have a File System bridge API into the scoped storage module. So using the Native File APIs to read/write files into external storage simply does not work and the only API available to do those actions is the previously mentioned MediaStore API.
As a workaround for now, you'll need to use a plugin that implements/exposes the MediaStore API. But a plugin that does it's work via MediaStore is only one cog in this machine. If the that app that created that file you're attempting to read doesn't implement a FileProvider to grant permissions to other apps, then the file will not be readable.
gtaormina
chiraganand
EYALIN
MauriceFrank
Problem
Hi everyone, i recently noticed that since the update to Android 12-13 / API 32-33, the readAsDataURL and readAsDataText methods are no longer working (return NULL) in case of reading PDF/TXT files, while they work no problem for pictures or videos. The folder I'm reading from is the Downloads folder of my Internal Storage.
What is expected to happen?
The result should return the Text or the Base64 Version (as Images)
What does actually happen?
The result is always null
Command or Code
` Hi, this is my actual code for reading NON MEDIA File in MyFileService in Ionic 6; this code works fine when targetSDK is 29-30, but the Google Playstore no longer accepts this SDK. When i changed to target 32-33 it didn't work anymore:
`//PROPERTY import { Injectable } from '@angular/core'; import { File } from '@ionic-native/file/ngx'; import { Device } from '@awesome-cordova-plugins/device/ngx'; import { FileChooser } from '@ionic-native/file-chooser/ngx'; import { FilePath } from '@awesome-cordova-plugins/file-path/ngx'; import { Platform } from '@ionic/angular'; import { HttpService } from './http.service'; import { Chooser } from '@awesome-cordova-plugins/chooser/ngx';
//CONSTRUCTOR public file: File, public device: Device, private platform: Platform, public fileChooser: FileChooser, private chooser: Chooser, public http: HttpService, private filePath: FilePath
....
//SNIPPET WITH ERROR this.fileChooser .open() .then((uri) => { this.filePath .resolveNativePath(uri) .then((url) => { this.file .resolveLocalFilesystemUrl(url) .then((fileEntry: any) => { this.platform.ready().then(() => { debugger; this.file.checkFile(fileEntry['nativeURL'].replace(fileEntry['name'], ''), fileEntry['name']).then(response => { debugger; if (response === true) { this.file .readAsText( fileEntry['nativeURL'].replace(fileEntry['name'], ''), fileEntry['name'] ) .then((result) => { if (result) { ----> //RESULT NULL FOR PDF and TXT <--------- debugger; resolve(result); } else { reject('Errore'); } }) .catch((err) => { console.log('err-->' + JSON.stringify(err)); }); } }).catch(err => { debugger; }); }); }); }) .catch((err_3) => { reject(err_3); }); }) .catch((err_2) => { reject(err_2); });``
Environment, Platform, Device
Ionic Cordova Android Platform 11
Version information
Ionic:
Ionic CLI : 6.20.3 (/usr/local/lib/node_modules/@ionic/cli) Ionic Framework : @ionic/angular 6.4.1 @angular-devkit/build-angular : 12.0.5 @angular-devkit/schematics : 12.2.18 @angular/cli : 12.0.5 @ionic/angular-toolkit : 4.0.0
Cordova:
Cordova CLI : 11.0.0 Cordova Platforms : android 11.0.0, ios 6.2.0 Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 27 other plugins)
Utility:
cordova-res : not installed globally native-run (update available: 1.7.2) : 1.7.1
System:
Android SDK Tools : 26.1.1 (/Users/giuseppetaormina/Library/Android/sdk) ios-sim : 8.0.2 NodeJS : v18.12.0 (/usr/local/bin/node) npm : 8.19.2 OS : macOS Xcode : Xcode 14.3 Build version 14E222b