fix regression issues

Author: xianing

Android/APIExample/app/src/main/java/io/agora/api/example/examples/advanced/PlayAudioFiles.java

@@ -22,6 +22,8 @@
 import com.yanzhenjie.permission.AndPermission;
 import com.yanzhenjie.permission.runtime.Permission;
 
+import java.text.SimpleDateFormat;
+
 import io.agora.api.component.Constant;
 import io.agora.api.example.R;
 import io.agora.api.example.annotation.Example;
@@ -200,6 +202,7 @@ public void onDestroy()
         /**leaveChannel and Destroy the RtcEngine instance*/
         if(engine != null)
         {
+            stopProgressTimer();
             engine.leaveChannel();
         }
         handler.post(RtcEngine::destroy);
@@ -267,11 +270,12 @@ else if(v.getId() == R.id.bgmStart)
         {
             sliderSpeed.setProgress(50);
             engine.startAudioMixing(currentMusic, false, false, -1, 0);
-            engine.getAudioFileInfo(currentMusic);
             startProgressTimer();
         }
         else if(v.getId() == R.id.bgmStop){
             engine.stopAudioMixing();
+            progressText.setText("00:00");
+            mixingProgressBar.setProgress(0);
             stopProgressTimer();
         }
         else if(v.getId() == R.id.bgmResume){
@@ -327,7 +331,9 @@ private void stopProgressTimer() {
     }
 
     private void startProgressTimer() {
-        final int result = (int) ((float) engine.getAudioMixingCurrentPosition() / (float) engine.getAudioFileInfo(Constant.URL_PLAY_AUDIO_FILES) * 100);
+        String timeString = new SimpleDateFormat("mm:ss").format(engine.getAudioMixingDuration());
+        progressText.setText(timeString);
+        final int result = (int) ((float) engine.getAudioMixingCurrentPosition() / (float) engine.getAudioMixingDuration() * 100);
         mixingProgressBar.setProgress(Long.valueOf(result).intValue());
         handler.postDelayed(this::startProgressTimer, 500);
     }

macOS/APIExample/Examples/Advanced/CustomAudioRender/CustomAudioRender.swift

@@ -157,8 +157,8 @@ class CustomAudioRender: BaseViewController {
             agoraKit.disableVideo()
 
             // set proxy configuration
-            let proxySetting = GlobalSettings.shared.proxySetting.selectedOption().value
-            agoraKit.setCloudProxy(AgoraCloudProxyType.init(rawValue: UInt(proxySetting)) ?? .noneProxy)
+//            let proxySetting = GlobalSettings.shared.proxySetting.selectedOption().value
+//            agoraKit.setCloudProxy(AgoraCloudProxyType.init(rawValue: UInt(proxySetting)) ?? .noneProxy)
 
             // set live broadcaster mode
             agoraKit.setChannelProfile(.liveBroadcasting)
@@ -167,10 +167,8 @@ class CustomAudioRender: BaseViewController {
 
             // setup external audio source
             exAudio.setupExternalAudio(withAgoraKit: agoraKit, sampleRate: UInt32(sampleRate), channels: UInt32(audioChannel), audioCRMode: .sdkCaptureExterRender, ioType: .remoteIO)
-            // important!! this example is using onPlaybackAudioFrame to do custom rendering
-            // by default the audio output will still be processed by SDK hence below api call is mandatory to disable that behavior
-            agoraKit.setParameters("{\"che.audio.external_render\": true}")
-            agoraKit.setParameters("{\"che.audio.keep.audiosession\": true}")
+            
+            agoraKit.enableExternalAudioSink(sampleRate, channels: audioChannel)
 
             // start joining channel
             // 1. Users can only see each other after they join the