How can I read/write my text file in /Documents?

MIT App Inventor Help
1

How can I read/write my text file in /Documents ?

2

use the file component together with the Scope = Shared
protip: do a search in the community to find some examples

Taifun

1 Like
3

My blocks do not work
Cattura
blocks11

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try the relative path /Documents/Appunti.txt
Taifun

2 Likes
5

it's the first attempt I've made

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If the text file (Appunti.txt) is created by the app itself, it is no problem to read it with the File component and / or to save new text (in the shared folder /Documents).

If the text file is not created by the app itself, but was copied into the /Documents folder by another app or manually, there are 3 options (since the app, as you said, is only for your own use):

  1. Change the targetSdkVersion to 29 (easiest way).

  2. Declare MANAGE_EXTERNAL_STORAGE in the Manifest and request this permission (to get full access to all files / directories).

  3. Save / copy Appunti.txt (manually) in the ASD, eg here:
    /storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/Documents/Appunti.txt
    and copy / move it (in the Screen.Initialize event) to the shared folder → /Documents (releative path) using the app
    → /storage/emulated/0/Documents/Appunti.txt (absolute path).

1 Like
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How can I create it ? by saving ? I tried without success

I don't know how can I do 1,2

8

You could use APK Editor Studio

3 Likes
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Try this APK (targetSdkVerion = 29).
Put "Appunti.txt" in the folder /Documents.

1 Like
10

It runs well

11

This is the manifest of my apps

<?xml version="1.0" encoding="utf-8" standalone="no"?> 
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:maxSdkVersion="29" android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application android:debuggable="false" android:icon="@mipmap/ic_launcher" android:label="PROVA" android:name="com.google.appinventor.components.runtime.multidex.MultiDexApplication" android:networkSecurityConfig="@xml/network_security_config" android:preserveLegacyExternalStorage="true" android:requestLegacyExternalStorage="true" android:roundIcon="@mipmap/ic_launcher" android:theme="@style/AppTheme">
    <uses-library android:name="org.apache.http.legacy" android:required="false"/>
    <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize" android:name=".Screen1" android:windowSoftInputMode="stateHidden">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
    <provider android:authorities="appinventor.ai_andrea_patelli.PROVA.provider" android:exported="false" android:grantUriPermissions="true" android:name="androidx.core.content.FileProvider">
        <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths"/>
    </provider>
</application>

what changes I have to do ?

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grafik
grafik1836×658 89.2 KB

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If I understand well I can recompile my old projects, edit the apk as you showed and they can run with android 11.

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Yes, but why don't you just try it yourself?
Of course, these apps cannot be released in the Play Store if they were published there after July 31, 2021.

3 Likes
15

I tried, I can read but not save, permission denied, please enable it in settings app.

No problem for me

1 Like
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You must set DefaultFileScope to Legacy, as I've shown in my test aia:

grafik

Note: This is of course a bug, that has to be fixed soon.

3 Likes
17

Thank you, it runs, now I can update my old projects without problems

1 Like
18

Are you sure you found the solution? :upside_down_face:

2 Likes
19

What do you mean ?
I recompiled some old projects, I changed DefaultFileScope and targetSdkVersion, the apps run well.
I would prefer to avoid all these steps, but I don't understand how and if it can be done.
You said:
Declare MANAGE_EXTERNAL_STORAGE` in the Manifest and request this permission (to get full access to all files / directories).'
How ? I tried without success

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="28" />
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
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Can you answer me?