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

android-project/app/proguard-rules.pro

@@ -48,6 +48,7 @@
     int openURL(java.lang.String);
     int showToast(java.lang.String, int, int, int, int);
     native java.lang.String nativeGetHint(java.lang.String);
+    int openFileDescriptor(java.lang.String, java.lang.String);
 }
 
 -keep,includedescriptorclasses,allowoptimization class org.libsdl.app.HIDDeviceManager {

android-project/app/src/main/java/org/libsdl/app/SDLActivity.java

@@ -23,6 +23,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
+import android.os.ParcelFileDescriptor;
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.util.SparseArray;
@@ -44,6 +45,7 @@ import android.widget.RelativeLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import java.io.FileNotFoundException;
 import java.util.Hashtable;
 import java.util.Locale;
 
@@ -1938,6 +1940,23 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
         }
         return 0;
     }
+
+    /**
+     * This method is called by SDL using JNI.
+     */
+    public static int openFileDescriptor(String uri, String mode) throws Exception {
+        if (mSingleton == null) {
+            return -1;
+        }
+
+        try {
+            ParcelFileDescriptor pfd = mSingleton.getContentResolver().openFileDescriptor(Uri.parse(uri), mode);
+            return pfd != null ? pfd.detachFd() : -1;
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+            return -1;
+        }
+    }
 }
 
 /**