Workaround for android's new file scanning behaviour when using the device as a USB drive.

extras/JuceDemo/Builds/Android/src/com/juce/JuceDemo.java

@@ -45,6 +45,8 @@ import java.net.URL;
 import java.net.HttpURLConnection;
 import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.opengles.GL10;
+import android.media.MediaScannerConnection;
+import android.media.MediaScannerConnection.MediaScannerConnectionClient;
 
 //==============================================================================
 public final class JuceDemo   extends Activity
@@ -527,4 +529,35 @@ public final class JuceDemo   extends Activity
         return isRegion ? locale.getDisplayCountry  (java.util.Locale.US)
                         : locale.getDisplayLanguage (java.util.Locale.US);
     }
+
+    //==============================================================================
+    private final class SingleMediaScanner  implements MediaScannerConnectionClient
+    {
+        public SingleMediaScanner (Context context, String filename)
+        {
+            file = filename;
+            msc = new MediaScannerConnection (context, this);
+            msc.connect();
+        }
+
+        @Override
+        public void onMediaScannerConnected()
+        {
+            msc.scanFile (file, null);
+        }
+
+        @Override
+        public void onScanCompleted (String path, Uri uri)
+        {
+            msc.disconnect();
+        }
+
+        private MediaScannerConnection msc;
+        private String file;
+    }
+
+    public final void scanFile (String filename)
+    {
+        new SingleMediaScanner (this, filename);
+    }
 }

modules/juce_core/native/java/JuceAppActivity.java

@@ -45,6 +45,8 @@ import java.net.URL;
 import java.net.HttpURLConnection;
 import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.opengles.GL10;
+import android.media.MediaScannerConnection;
+import android.media.MediaScannerConnection.MediaScannerConnectionClient;
 
 //==============================================================================
 public final class JuceAppActivity   extends Activity
@@ -527,4 +529,35 @@ public final class JuceAppActivity   extends Activity
         return isRegion ? locale.getDisplayCountry  (java.util.Locale.US)
                         : locale.getDisplayLanguage (java.util.Locale.US);
     }
+
+    //==============================================================================
+    private final class SingleMediaScanner  implements MediaScannerConnectionClient
+    {
+        public SingleMediaScanner (Context context, String filename)
+        {
+            file = filename;
+            msc = new MediaScannerConnection (context, this);
+            msc.connect();
+        }
+
+        @Override
+        public void onMediaScannerConnected()
+        {
+            msc.scanFile (file, null);
+        }
+
+        @Override
+        public void onScanCompleted (String path, Uri uri)
+        {
+            msc.disconnect();
+        }
+
+        private MediaScannerConnection msc;
+        private String file;
+    }
+
+    public final void scanFile (String filename)
+    {
+        new SingleMediaScanner (this, filename);
+    }
 }

modules/juce_core/native/juce_android_JNIHelpers.h

@@ -360,6 +360,7 @@ extern ThreadLocalJNIEnvHolder threadLocalJNIEnvHolder;
  METHOD (showOkCancelBox,        "showOkCancelBox",      "(Ljava/lang/String;Ljava/lang/String;J)V") \
  METHOD (showYesNoCancelBox,     "showYesNoCancelBox",   "(Ljava/lang/String;Ljava/lang/String;J)V") \
  STATICMETHOD (getLocaleValue,   "getLocaleValue",       "(Z)Ljava/lang/String;") \
+ METHOD (scanFile,               "scanFile",             "(Ljava/lang/String;)V")
 
 DECLARE_JNI_CLASS (JuceAppActivity, JUCE_ANDROID_ACTIVITY_CLASSPATH);
 #undef JNI_CLASS_MEMBERS

modules/juce_core/native/juce_posix_SharedCode.h

@@ -512,8 +512,15 @@ int FileOutputStream::writeInternal (const void* const data, const int numBytes)
 void FileOutputStream::flushInternal()
 {
     if (fileHandle != 0)
+    {
         if (fsync (getFD (fileHandle)) == -1)
             status = getResultForErrno();
+
+       #if JUCE_ANDROID
+        const LocalRef<jstring> t (javaString (file.getFullPathName()));
+        android.activity.callVoidMethod (JuceAppActivity.scanFile, t.get());
+       #endif
+    }
 }
 
 Result FileOutputStream::truncate()