"Require" Plugin

kussakov · April 2019

Guys,

Gideros comes with "Require" plugin for Android.
It looks like this is not exactly a plugin, but a way to add some permissions to the manifest.
My app needs to read files from the phone storage/SD card and process them.
I used the "Require" plugin to add "App needs to to write external storage" permission.
It adds it to the manifest (it only work for Android target 6.0 or lower by the way since what it adds is depreciated new newer versions of Android).

So when I set my target as Android 6 it adds "Storage" to app permissions.
The problem is that Android does not ask the user to Allow this permission.
It adds "Storage" to permissions, but the user has to go to App settings->Permissions and enable it manually. The "Allow" android dialog never comes.
The question is:
Do you know how to force this "Allow" dialog out of Gideros?

Thanks!

oleg · April 2019

you can edit require.gplugin

as you need

SinisterSoft said:
If you look at the 'requires' plugin (in the program files>gideros>all plugins folder) then you can see how we add the various patches to the Android files. They basically do a find and replace text on various files.

https://github.com/razorback456/gideros_tools/blob/master/require.gplugin

kussakov · April 2019

Thanks, I checked it out, but I actually meant something else:
Is there a way in Gideros to evoke ContextCompat.checkSelfPermission() and ActivityCompat.requestPermissions with specific permission, because having the permissions in the manifest does not help in some cases. The user has no way of turning them on inside the app (the popup does not appear).
I know that some of the plugins have code to check for specific permission (camera microphone), but the LFS plugin, for example, does not check for "Storage" permission (since it is low level and written in C I guess).

I see that there is some Example plugin that "Send a start event, wifi count and needed permissions. Can send a stop event."
Do you know if I can use this to ask for Storage permissions and if so how?

Thanks!

oleg · April 2019

what is maxSdkVersion in you?

<uses-permission
     android:name="android.permission.WRITE_EXTERNAL_STORAGE"
     android:maxSdkVersion="18" />

kussakov · April 2019

@oleg it is 23 (6.0). If it is say 26 this does not work at all (no access to storage and SD card)

MoKaLux · April 2019

@kussakov hello there,

In android studio to request user permission through an app, you need to write some java code requesting those permissions. Now that google tells us to target android version 26 minimum I believe we need to implement this in all our apps.

I don't know gideros that much but one of my first test was to export a gideros sample to android studio. Then I had to update quite a few things like gradle and so.

Once all the updating was done in android studio I could write my java code and successfully run the demo on my android phone. You may try this way?

I wish gideros don't give up this option as it can be handy.

hgy29 · April 2019

Yes, WRITE_EXTERNAL_STORAGE is one of the dangerous permissions since android 23, that is no longer granted automatically even if specified in the manifest. You have to request it through Java code, and since it is asynchronous you further need to check if the permission was granted by the user.

There is no way to do it with current Gideros APIs, I reckon the relevant Java code and lua bindings should be added to require plugin.

SinisterSoft · April 2019

@MoKaLux You can still do it that way, just untick 'generate apk' in the export option.

MoKaLux · April 2019

i thought i had to use the old export!

MoKaLux · April 2019

in fact this is the option that got me into using gideros.

SinisterSoft · April 2019

No, don't use the old export - just use the new one and untick the generate apk.

kussakov · April 2019

Got it @hgy29. Yes - they depreciated WRITE_EXTERNAL_STORAGE.

I will probably try to add some java code to one of the existing plugins. I don't know exactly how to add new plugins in Android (only in iOS). Hope I don't have to change some C code, because I don't know how to compile it for Android.

By the way: Is there a tutorial of how to make plugin for Android - that has callbacks and stuff and how to compile it? I can try that...

Thanks

antix · April 2019

@kussakov Unfirtunately there doesn't seem to be any uptodate easy to follow good tutorial on making plugins for Gideros. It's one of those things that it really needs.

hgy29 · April 2019

antix said:
@kussakov Unfirtunately there doesn't seem to be any uptodate easy to follow good tutorial on making plugins for Gideros. It's one of those things that it really needs.

I'd be happy to help anyone who wants to do that. I tried many times to write a guide but I just don't know where to start.

SinisterSoft · April 2019

I'll write one for Lua Plugins, I've been meaning to do that for a while.

MoKaLux · May 2019

@kussakov hello there,

I have some java code for you.
1- export your gideros project to android studio
2- in the onCreate method:

        // ask permission to write
        if (Build.VERSION.SDK_INT >= 23) {
            if (isPermissionWriteES()) {
                // permission OK can save image
                // return; // THIS RETURN CALL BREAKS THE APP!!!
            } else {
                requestPermissionWES();
            }
        }

3- then the other functions to ask the user the permissions:

    private boolean isPermissionWriteES() {
        int result = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
        return result == PackageManager.PERMISSION_GRANTED;
    }
 
    private void requestPermissionWES() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
            zprefsutil.myShowToast(getApplicationContext().getString(R.string.permissionrw), 1);
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                    PERMISSION_WRITE_EXTERNAL_STORAGE);
        } else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                    PERMISSION_WRITE_EXTERNAL_STORAGE);
        }
    }

@SuppressLint("Override")
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
switch (requestCode) {
case PERMISSION_WRITE_EXTERNAL_STORAGE:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
zprefsutil.myShowToast("SUPER.", 1);
} else {
zprefsutil.myShowToast(getApplicationContext().getString(R.string.nopermissionrw), 1);
}
break;
default:
break;
}
}

Hope that can help you.
nb1: i could not format the last piece of code because of special characters
nb2: you need to create the class with:

public class A01_MenuActivity extends Activity implements OnClickListener, OnRequestPermissionsResultCallback {

kussakov · May 2019

Thanks @MoKaLux!
I added the code to my main activity class (instead of to some plugin java code).
(Needed to add:
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
and this do the build.gradle: implementation "com.android.support:support-v4:27.+"
and some static variable for PERMISSION_WRITE_EXTERNAL_STORAGE)

Now the "permission" dialog pops and asks for storage permission and when I "allow" - it sets the storage permissions in the app permission settings.
I do not have control in the lua (since it is not a plugin), but it sets the permission.

The problem is that the app has no access to the storage at all. Even though the permission is now set... I use LuaFileSystem calls and Gideros Texture.new to access the SD card content.
It works if the targetSdkVersion is 23.

MoKaLux · May 2019

so you mean that asking the user permission is ok but you cannot save to android?

It is a feature I am planning to use later on and that doesn't work above sdk 23? Damn google! They really want us to use android studio!

kussakov · May 2019

Yes. The permissions look good, but I can't even see the SD cards using lfs.

MoKaLux · August 2019

@kussakov I HAVE A SURPRISE FOR YOU. I need to tidy up my code and you can see the gideros magic at its best.

Are you in a hurry?

hgy29 · August 2019

This reminds that I forgot to tell you: I added two news calls to core gideros (in next release) to check if a permission was granted and request new permissions. Of course they will be implemented only for Android.

MoKaLux · August 2019

ok this is a solution:

--require Media plugin
require "media"
 
-- draw your gfx (here I draw a simple pixel)
local source = Pixel.new(0xffff00, 0.75, 128, 128)
-- create a render target and draw to it
local rt = RenderTarget.new(source:getWidth(), source:getHeight())
rt:draw(source)
-- save your render target to gideros documents folder
local myfilepath = "|D|mysavedpicture2.png"
rt:save(myfilepath)
-- create a new media and save your gfx
-- android saved path = internal storage/pictures
-- NEED permission write external storage
local media = Media.new(myfilepath)
mediamanager:postPicture(myfilepath)
 
-- show your gfx on stage
local mybmprt = Bitmap.new(rt)
mybmprt:setPosition(64, 64)
stage:addChild(mybmprt)

I have tested it on my Samsung J6 running android 9.
It saves your gfx to android pictures folder and the name of the file is: YYMMDD_HHMMSS_gideros.jpg

On windows 10, this will open the file explorer where you can change the file name.

Voilà.

Apollo14 · August 2019

This is nice!! Thanks! But don't we need to pre-declare 'mediamanager'?

mediamanager:postPicture(myfilepath) --I see it's the only mentioning of mediamanager, it wasn't declared anywhere?

MoKaLux · August 2019

no you don't because it is part of the media plugin.
This sample code is ready to use: copy/paste and voilà.
(you need to create a project of course!)

On windows that will open a save file dialog. On mac I don't know. On iPhone I don't know too.

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