Implement file provider capabilities

The previously used file sharing api was restricted after Android N causing the engine to crash whenever used on devices running Android N or higher.

platform/android/export/export_plugin.cpp

@@ -1027,6 +1027,10 @@ void EditorExportPlatformAndroid::_fix_manifest(const Ref<EditorExportPreset> &p
 						encode_uint32(is_resizeable, &p_manifest.write[iofs + 16]);
 					}
 
+					if (tname == "provider" && attrname == "authorities") {
+						string_table.write[attr_value] = get_package_name(package_name) + String(".fileprovider");
+					}
+
 					if (tname == "supports-screens") {
 						if (attrname == "smallScreens") {
 							encode_uint32(screen_support_small ? 0xFFFFFFFF : 0, &p_manifest.write[iofs + 16]);

platform/android/java/lib/AndroidManifest.xml

@@ -20,6 +20,16 @@
             android:exported="false"
             />
 
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/godot_provider_paths" />
+        </provider>
+
     </application>
 
 </manifest>

platform/android/java/lib/res/xml/godot_provider_paths.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+
+	<external-path
+		name="public"
+		path="." />
+
+	<external-files-path
+		name="app"
+		path="." />
+</paths>

platform/android/java/lib/src/org/godotengine/godot/GodotIO.java

@@ -49,6 +49,9 @@ import android.view.Display;
 import android.view.DisplayCutout;
 import android.view.WindowInsets;
 
+import androidx.core.content.FileProvider;
+
+import java.io.File;
 import java.util.List;
 import java.util.Locale;
 
@@ -84,29 +87,42 @@ public class GodotIO {
 	// MISCELLANEOUS OS IO
 	/////////////////////////
 
-	public int openURI(String p_uri) {
+	public int openURI(String uriString) {
 		try {
-			String path = p_uri;
-			String type = "";
-			if (path.startsWith("/")) {
-				//absolute path to filesystem, prepend file://
-				path = "file://" + path;
-				if (p_uri.endsWith(".png") || p_uri.endsWith(".jpg") || p_uri.endsWith(".gif") || p_uri.endsWith(".webp")) {
-					type = "image/*";
+			Uri dataUri;
+			String dataType = "";
+			boolean grantReadUriPermission = false;
+
+			if (uriString.startsWith("/") || uriString.startsWith("file://")) {
+				String filePath = uriString;
+				// File uris needs to be provided via the FileProvider
+				grantReadUriPermission = true;
+				if (filePath.startsWith("file://")) {
+					filePath = filePath.replace("file://", "");
 				}
+
+				File targetFile = new File(filePath);
+				dataUri = FileProvider.getUriForFile(activity, activity.getPackageName() + ".fileprovider", targetFile);
+				dataType = activity.getContentResolver().getType(dataUri);
+			} else {
+				dataUri = Uri.parse(uriString);
 			}
 
 			Intent intent = new Intent();
 			intent.setAction(Intent.ACTION_VIEW);
-			if (!type.equals("")) {
-				intent.setDataAndType(Uri.parse(path), type);
+			if (TextUtils.isEmpty(dataType)) {
+				intent.setData(dataUri);
 			} else {
-				intent.setData(Uri.parse(path));
+				intent.setDataAndType(dataUri, dataType);
+			}
+			if (grantReadUriPermission) {
+				intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 			}
 
 			activity.startActivity(intent);
 			return 0;
 		} catch (ActivityNotFoundException e) {
+			Log.e(TAG, "Unable to open uri " + uriString, e);
 			return 1;
 		}
 	}