Using MediaScanner to notify Android when a new file has been created on the system

src/android/org/linphone/LinphoneManager.java

@@ -111,6 +111,7 @@ import org.linphone.receivers.HookReceiver;
 import org.linphone.receivers.KeepAliveReceiver;
 import org.linphone.receivers.NetworkManager;
 import org.linphone.receivers.OutgoingCallReceiver;
+import org.linphone.ui.LinphoneMediaScanner;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -210,6 +211,8 @@ public class LinphoneManager implements CoreListener, SensorEventListener, Accou
                        Log.e(mUserCertsPath+" can't be created."); 
             }
         }
+
+        mMediaScanner = new LinphoneMediaScanner(c);
     }
 
     private static final int LINPHONE_VOLUME_STREAM = STREAM_VOICE_CALL;
@@ -228,6 +231,7 @@ public class LinphoneManager implements CoreListener, SensorEventListener, Accou
     private final String mUserCertsPath;
     private Timer mTimer;
     private Map<String, Integer> mUnreadChatsPerRoom;
+    private LinphoneMediaScanner mMediaScanner;
 
     private void routeAudioToSpeakerHelper(boolean speakerOn) {
         Log.w("Routing audio to " + (speakerOn ? "speaker" : "earpiece") + ", disabling bluetooth audio route");
@@ -998,11 +1002,16 @@ public class LinphoneManager implements CoreListener, SensorEventListener, Accou
     public static synchronized void destroy() {
         if (instance == null) return;
         instance.changeStatusToOffline();
+        instance.mMediaScanner.destroy();
         sExited = true;
         instance.destroyCore();
         instance = null;
     }
 
+    public LinphoneMediaScanner getMediaScanner() {
+        return mMediaScanner;
+    }
+
     private String getString(int key) {
         return mR.getString(key);
     }

src/android/org/linphone/LinphoneUtils.java

@@ -51,6 +51,8 @@ import org.linphone.core.AccountCreator;
 import org.linphone.core.Address;
 import org.linphone.core.Call;
 import org.linphone.core.Call.State;
+import org.linphone.core.ChatMessage;
+import org.linphone.core.Content;
 import org.linphone.core.Core;
 import org.linphone.core.Factory;
 import org.linphone.core.Friend;
@@ -62,6 +64,7 @@ import org.linphone.core.LoggingServiceListener;
 import org.linphone.core.ProxyConfig;
 import org.linphone.mediastream.Log;
 import org.linphone.mediastream.video.capture.hwconf.Hacks;
+import org.linphone.ui.LinphoneMediaScanner;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -764,6 +767,7 @@ public final class LinphoneUtils {
         if (!file.isDirectory() || !file.exists()) {
             Log.w("Directory " + file + " doesn't seem to exists yet, let's create it");
             file.mkdirs();
+            LinphoneManager.getInstance().getMediaScanner().scanFile(file);
         }
         return storageDir;
     }
@@ -776,5 +780,17 @@ public final class LinphoneUtils {
         }
         imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
     }
+
+    public static void scanFile(ChatMessage message) {
+        String appData = message.getAppdata();
+        if (appData == null) {
+            for (Content c : message.getContents()) {
+                if (c.isFile()) {
+                    appData = c.getFilePath();
+                }
+            }
+        }
+        LinphoneManager.getInstance().getMediaScanner().scanFile(new File(appData));
+    }
 }
 

src/android/org/linphone/chat/ChatEventsAdapter.java

@@ -33,7 +33,6 @@ import android.media.ExifInterface;
 import android.media.ThumbnailUtils;
 import android.net.Uri;
 import android.os.AsyncTask;
-import android.os.Environment;
 import android.provider.MediaStore;
 import android.support.annotation.NonNull;
 import android.support.v4.content.FileProvider;
@@ -527,6 +526,7 @@ public class ChatEventsAdapter extends SelectableAdapter<ChatBubbleViewHolder> {
         }
 
         if (appData != null) {
+            LinphoneUtils.scanFile(message);
             holder.fileName.setText(LinphoneUtils.getNameFromFilePath(appData));
             if (LinphoneUtils.isExtensionImage(appData)) {
                 holder.messageImage.setVisibility(View.VISIBLE);

src/android/org/linphone/ui/LinphoneMediaScanner.java

@@ -0,0 +1,57 @@
+package org.linphone.ui;
+
+import android.content.Context;
+import android.media.MediaScannerConnection;
+import android.net.Uri;
+
+import org.linphone.mediastream.Log;
+
+import java.io.File;
+
+public class LinphoneMediaScanner implements MediaScannerConnection.MediaScannerConnectionClient {
+    private MediaScannerConnection mMediaConnection;
+    private boolean mIsConnected;
+    private File mFileWaitingForScan;
+
+    public LinphoneMediaScanner(Context context) {
+        mIsConnected = false;
+        mMediaConnection = new MediaScannerConnection(context, this);
+        mMediaConnection.connect();
+        mFileWaitingForScan = null;
+    }
+
+    @Override
+    public void onMediaScannerConnected() {
+        mIsConnected = true;
+        Log.i("[MediaScanner] Connected");
+        if (mFileWaitingForScan != null) {
+            scanFile(mFileWaitingForScan);
+            mFileWaitingForScan = null;
+        }
+    }
+
+    public void scanFile(File file) {
+        scanFile(file, null);
+    }
+
+    public void scanFile(File file, String mime) {
+        if (!mIsConnected) {
+            Log.w("[MediaScanner] Not connected yet...");
+            mFileWaitingForScan = file;
+            return;
+        }
+        Log.i("[MediaScanner] Scanning file " + file.getAbsolutePath() + " with MIME " + mime);
+        mMediaConnection.scanFile(file.getAbsolutePath(), mime);
+    }
+
+    @Override
+    public void onScanCompleted(String path, Uri uri) {
+        Log.i("[MediaScanner] Scan completed : " + path + " => " + uri);
+    }
+
+    public void destroy() {
+        Log.i("[MediaScanner] Disconnecting");
+        mMediaConnection.disconnect();
+        mIsConnected = false;
+    }
+}