Android: Allow SDL_IOFromFile to open content:// URI. (#9696)

src/file/SDL_iostream.c

@@ -54,6 +54,7 @@ struct SDL_IOStream
 #endif /* SDL_PLATFORM_3DS */
 
 #ifdef SDL_PLATFORM_ANDROID
+#include <unistd.h>
 #include "../core/android/SDL_android.h"
 #endif
 
@@ -558,6 +559,22 @@ SDL_IOStream *SDL_IOFromFile(const char *file, const char *mode)
             }
             return SDL_IOFromFP(fp, 1);
         }
+    } else if (SDL_strncmp(file, "content://", 10) == 0) {
+        /* Try opening content:// URI */
+        int fd = Android_JNI_OpenFileDescriptor(file, mode);
+        if (fd == -1) {
+            /* SDL error is already set. */
+            return NULL;
+        }
+
+        FILE *fp = fdopen(fd, mode);
+        if (!fp) {
+            close(fd);
+            SDL_SetError("Unable to open file descriptor (%d) from URI %s", fd, file);
+            return NULL;
+        }
+
+        return SDL_IOFromFP(fp, SDL_TRUE);
     } else {
         /* Try opening it from internal storage if it's a relative path */
         // !!! FIXME: why not just "char path[PATH_MAX];"