catch exception

app/src/main/java/com/frank/ffmpeg/activity/AudioEffectActivity.kt

@@ -63,7 +63,8 @@ class AudioEffectActivity : AppCompatActivity(), OnSeeBarListener {
     private val onPreparedListener = MediaPlayer.OnPreparedListener {
         setupEqualizer()
         setupPresetStyle()
-        setupReverberation()
+        // some mobiles throws error here
+//        setupReverberation()
         setupBassBoost()
         setLoudnessEnhancer()
         setupVisualizer()
@@ -244,12 +245,12 @@ class AudioEffectActivity : AppCompatActivity(), OnSeeBarListener {
     override fun onDestroy() {
         super.onDestroy()
 
-        mEqualizer!!.release()
-        mPresetReverb!!.release()
-        mBass!!.release()
-        loudnessEnhancer!!.release()
+        mEqualizer?.release()
+        mPresetReverb?.release()
+        mBass?.release()
+        loudnessEnhancer?.release()
         releaseVisualizer()
-        mPlayer!!.release()
+        mPlayer?.release()
     }
 
 }

app/src/main/java/com/frank/ffmpeg/format/AudioVisualizer.java

@@ -1,7 +1,7 @@
 package com.frank.ffmpeg.format;
 
 import android.media.audiofx.Visualizer;
-import android.os.Build;
+import android.util.Log;
 
 /**
  * Visualizer of Audio frequency
@@ -12,6 +12,7 @@ public class AudioVisualizer {
     private Visualizer visualizer;
 
     public void initVisualizer(int audioSession, boolean waveform, boolean fft, Visualizer.OnDataCaptureListener dataCaptureListener) {
+        try {
             visualizer = new Visualizer(audioSession);
             int captureSize = Visualizer.getCaptureSizeRange()[1];
             int captureRate = Visualizer.getMaxCaptureRate() / 2;
@@ -20,6 +21,10 @@ public class AudioVisualizer {
             visualizer.setDataCaptureListener(dataCaptureListener, captureRate, waveform, fft);
             visualizer.setScalingMode(Visualizer.SCALING_MODE_NORMALIZED);
             visualizer.setEnabled(true);
+        } catch (Exception e) {
+            Log.e("AudioVisualizer", "initVisualizer error=" + e.toString());
+            releaseVisualizer();
+        }
     }
 
     public void releaseVisualizer() {