From e4e63eee810d9350b3f18d092e922b129374591d Mon Sep 17 00:00:00 2001
From: Torsten Grote <t@grobox.de>
Date: Tue, 7 Mar 2023 11:50:38 -0300
Subject: [PATCH] [app] Ask user to enable unknown sources for F-Droid when
 needed

This still needs to be tested on old Android versions < 31
---
 .../org/fdroid/fdroid/installer/DefaultInstaller.java | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/app/src/main/java/org/fdroid/fdroid/installer/DefaultInstaller.java b/app/src/main/java/org/fdroid/fdroid/installer/DefaultInstaller.java
index 5bd91400a..7a1bb65ef 100644
--- a/app/src/main/java/org/fdroid/fdroid/installer/DefaultInstaller.java
+++ b/app/src/main/java/org/fdroid/fdroid/installer/DefaultInstaller.java
@@ -24,6 +24,8 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Build;
+import android.provider.Settings;
 
 import org.fdroid.fdroid.data.Apk;
 import org.fdroid.fdroid.data.App;
@@ -48,6 +50,15 @@ public class DefaultInstaller extends Installer {
 
     @Override
     protected void installPackageInternal(Uri localApkUri, Uri canonicalUri) {
+        // ask to enable unknown sources on old Android versions
+        if (Build.VERSION.SDK_INT >= 26 && Build.VERSION.SDK_INT < 31) {
+            if (!context.getPackageManager().canRequestPackageInstalls()) {
+                Intent i = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES);
+                i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                i.setData(Uri.parse("package:" + context.getPackageName()));
+                context.startActivity(i);
+            }
+        }
 
         Intent installIntent = new Intent(context, DefaultInstallerActivity.class);
         installIntent.setAction(DefaultInstallerActivity.ACTION_INSTALL_PACKAGE);