EACCES issues on API level 29 (Android 10)

[PedaB]

Today my Android phone did an update to Android 10. After that I got many errors in OSMTracker. Recording Audio, making a note, exporting to GPX,.. basically everything produced an error. The most meaningful one was while trying to write debug infos. OSMTracker basically stated "EACCES (permission denied)".

Googling this suggests, that this is a new security "feature" in Android 10 disallowing to write to directories the App doesn't "own" or so. In API level 29 there seems to be a workaround, adding an attribute to replicate the old behavior of Android <10. Applying the patch below against master solves the issue for me (thanks to @tordanik for helping to build 😃). However, I assume this needs to be fixed properly by someone with knowledge of Android.

diff --git a/app/build.gradle b/app/build.gradle
index 2b72e63..ffbce7c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -3,13 +3,13 @@ apply plugin: 'com.android.application'
 android {
 
     useLibrary 'org.apache.http.legacy'
-    compileSdkVersion 28
-    buildToolsVersion = '28.0.3'
+    compileSdkVersion 29
+    buildToolsVersion = '29.0.0'
 
     defaultConfig {
         applicationId "net.osmtracker"
-        minSdkVersion 16
-        targetSdkVersion 28
+        minSdkVersion 21
+        targetSdkVersion 29
         multiDexEnabled true
 
         testApplicationId "net.osmtracker.test"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 32bd95f..ec2b772 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -12,7 +12,7 @@
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
-	<application android:label="@string/app_name" android:description="@string/app_description" android:icon="@drawable/ic_launcher" android:theme="@style/HighContrast">
+	<application android:requestLegacyExternalStorage="true" android:label="@string/app_name" android:description="@string/app_description" android:icon="@drawable/ic_launcher" android:theme="@style/HighContrast">
 
 		<uses-library android:name="org.apache.http.legacy" android:required="false"/>