diff --git a/app/build.gradle b/app/build.gradle
index 59d5a4a..3731623 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -57,5 +57,5 @@ android {
 
 dependencies {
     testImplementation 'junit:junit:4.12'
-    implementation 'com.github.axet:android-audio-library:1.0.140' // implementation project(':android-audio-library')
+    implementation 'com.github.axet:android-audio-library:1.0.141' // implementation project(':android-audio-library')
 }
diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
index 8010273..ede24ef 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
@@ -8,6 +8,7 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.media.AudioFormat;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
@@ -23,17 +24,17 @@ import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowManager;
+import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import com.github.axet.androidlibrary.animations.MarginBottomAnimation;
-import com.github.axet.androidlibrary.app.SuperUser;
 import com.github.axet.androidlibrary.sound.AudioTrack;
 import com.github.axet.androidlibrary.widgets.AppCompatThemeActivity;
 import com.github.axet.androidlibrary.widgets.ErrorDialog;
 import com.github.axet.androidlibrary.widgets.OpenFileDialog;
+import com.github.axet.androidlibrary.widgets.Toast;
 import com.github.axet.audiolibrary.app.RawSamples;
 import com.github.axet.audiolibrary.app.Sound;
 import com.github.axet.audiolibrary.encoders.Factory;
@@ -85,7 +86,13 @@ public class RecordingActivity extends AppCompatThemeActivity {
     View done;
     PitchView pitch;
 
+    ScreenReceiver screen;
+
+    AudioApplication.RecordingStorage recording;
+
     RecordingReceiver receiver;
+
+    AlertDialog muted;
     Handler handler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
@@ -93,15 +100,57 @@ public class RecordingActivity extends AppCompatThemeActivity {
                 pitch.add((Double) msg.obj);
             if (msg.what == AudioApplication.RecordingStorage.UPDATESAMPLES)
                 updateSamples((Long) msg.obj);
-            if (msg.what == AudioApplication.RecordingStorage.END)
+            if (msg.what == AudioApplication.RecordingStorage.MUTED) {
+                if (Build.VERSION.SDK_INT >= 28)
+                    muted = new ErrorDialog(RecordingActivity.this, getString(R.string.mic_muted_pie)).setTitle(getString(R.string.mic_muted_error)).show();
+                else
+                    muted = ErrorDialog.Error(RecordingActivity.this, getString(R.string.mic_muted_error));
+                RecordingActivity.startActivity(RecordingActivity.this, true);
+            }
+            if (msg.what == AudioApplication.RecordingStorage.UNMUTED) {
+                if (muted != null) {
+                    Runnable run = new Runnable() {
+                        int count = 5;
+                        AlertDialog d = muted;
+
+                        @Override
+                        public void run() {
+                            if (count <= 0) {
+                                d.dismiss();
+                                return;
+                            }
+                            Button b = d.getButton(DialogInterface.BUTTON_NEUTRAL);
+                            b.setText(getString(R.string.auto_close, count));
+                            b.setVisibility(View.VISIBLE);
+                            b.setOnClickListener(new View.OnClickListener() {
+                                @Override
+                                public void onClick(View v) {
+                                }
+                            });
+                            count--;
+                            handler.postDelayed(this, 1000);
+                        }
+                    };
+                    run.run();
+                    muted = null;
+                }
+            }
+            if (msg.what == AudioApplication.RecordingStorage.END) {
                 pitch.drawEnd();
+                if (!recording.interrupt.get()) {
+                    stopRecording(getString(R.string.recording_status_pause));
+                    String text = "Error reading from stream";
+                    if (Build.VERSION.SDK_INT >= 28)
+                        new ErrorDialog(RecordingActivity.this, getString(R.string.mic_muted_pie)).setTitle(text).show();
+                    else
+                        ErrorDialog.Error(RecordingActivity.this, getString(R.string.mic_muted_error));
+                    RecordingActivity.startActivity(RecordingActivity.this, true);
+                }
+            }
             if (msg.what == AudioApplication.RecordingStorage.ERROR)
                 Error((Exception) msg.obj);
         }
     };
-    ScreenReceiver screen;
-
-    AudioApplication.RecordingStorage recording;
 
     public static void startActivity(Context context, boolean pause) {
         Log.d(TAG, "startActivity");
@@ -144,22 +193,6 @@ public class RecordingActivity extends AppCompatThemeActivity {
                 done.performClick();
                 return;
             }
-            if (a.equals(AudioApplication.RecordingStorage.PINCH)) {
-                pitch.add(intent.getDoubleExtra("data", 0));
-                return;
-            }
-            if (a.equals(AudioApplication.RecordingStorage.UPDATESAMPLES)) {
-                updateSamples(intent.getLongExtra("data", 0));
-                return;
-            }
-            if (a.equals(AudioApplication.RecordingStorage.END)) {
-                pitch.drawEnd();
-                return;
-            }
-            if (a.equals(AudioApplication.RecordingStorage.ERROR)) {
-                Error((Throwable) intent.getSerializableExtra("data"));
-                return;
-            }
             MediaButtonReceiver.handleIntent(msc, intent);
         }
     }
@@ -202,7 +235,7 @@ public class RecordingActivity extends AppCompatThemeActivity {
             if (t == null)
                 t = e;
         }
-        return SuperUser.toMessage(t);
+        return ErrorDialog.toMessage(t);
     }
 
     public void Error(Throwable e) {
@@ -278,9 +311,7 @@ public class RecordingActivity extends AppCompatThemeActivity {
         receiver.filter.addAction(ACTION_FINISH_RECORDING);
         receiver.registerReceiver(this);
 
-        final SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
         AudioApplication app = AudioApplication.from(this);
-
         try {
             if (app.recording == null)
                 app.recording = new AudioApplication.RecordingStorage(this, pitch.getPitchTime());
@@ -290,7 +321,7 @@ public class RecordingActivity extends AppCompatThemeActivity {
             }
         } catch (RuntimeException e) {
             Log.d(TAG, "onCreate", e);
-            Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
+            Toast.Error(this, e);
             finish();
             return;
         }
@@ -299,6 +330,7 @@ public class RecordingActivity extends AppCompatThemeActivity {
 
         title.setText(Storage.getName(this, recording.targetUri));
 
+        final SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
         if (shared.getBoolean(AudioApplication.PREFERENCE_CALL, false)) {
             TelephonyManager tm = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
             tm.listen(pscl, PhoneStateListener.LISTEN_CALL_STATE);
@@ -730,6 +762,7 @@ public class RecordingActivity extends AppCompatThemeActivity {
         final SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(this);
         SharedPreferences.Editor editor = shared.edit();
         editor.remove(AudioApplication.PREFERENCE_TARGET);
+        editor.commit();
     }
 
     void startRecording() {
diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/SettingsActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/SettingsActivity.java
index 5007fd3..35143d1 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/SettingsActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/SettingsActivity.java
@@ -58,7 +58,7 @@ public class SettingsActivity extends AppCompatSettingsThemeActivity implements
     public static final int RESULT_STORAGE = 1;
     public static final int RESULT_CALL = 2;
 
-    Handler handler = new Handler();
+    Storage storage = new Storage(this);
 
     public static String[] PREMS = new String[]{Manifest.permission.READ_PHONE_STATE};
 
@@ -197,7 +197,7 @@ public class SettingsActivity extends AppCompatSettingsThemeActivity implements
             }
         }
         if (key.equals(AudioApplication.PREFERENCE_STORAGE)) {
-            Storage.migrateLocalStorageDialog(this, handler, new Storage(this));
+            storage.migrateLocalStorageDialog();
         }
         if (key.equals(AudioApplication.PREFERENCE_RATE)) {
             int sampleRate = Integer.parseInt(sharedPreferences.getString(AudioApplication.PREFERENCE_RATE, ""));
diff --git a/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java b/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
index 5843d7f..edc551e 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/app/AudioApplication.java
@@ -36,6 +36,7 @@ import com.github.axet.audiorecorder.services.RecordingService;
 import java.io.File;
 import java.nio.ShortBuffer;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Locale;
 import java.util.concurrent.atomic.AtomicBoolean;
 
@@ -59,6 +60,8 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
         public static final int UPDATESAMPLES = 2;
         public static final int END = 3;
         public static final int ERROR = 4;
+        public static final int MUTED = 5;
+        public static final int UNMUTED = 6;
 
         public Context context;
         public final ArrayList<Handler> handlers = new ArrayList<>();
@@ -191,6 +194,9 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
 
                     android.os.Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO);
 
+                    boolean silenceDetected = false;
+                    long silence = samplesTime; // last silence 0-frame
+
                     try {
                         long start = System.currentTimeMillis();
                         recorder.startRecording();
@@ -242,6 +248,11 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
                                 }
                                 readSizeUpdate = dbSize / samplesUpdateStereo * samplesUpdateStereo;
                                 for (int i = 0; i < readSizeUpdate; i += samplesUpdateStereo) {
+                                    for (int k = 0; k < samplesUpdateStereo; k++) {
+                                        int off = i + k;
+                                        if (dbBuf[off] != 0)
+                                            silence = samplesTime + off / Sound.getChannels(context);
+                                    }
                                     double dB = RawSamples.getDB(dbBuf, i, samplesUpdateStereo);
                                     Post(PINCH, dB);
                                 }
@@ -260,6 +271,16 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
                                     Post(UPDATESAMPLES, m);
                                     samplesTimeCount -= samplesTimeUpdate;
                                 }
+
+                                if (samplesTime - silence > 2 * sampleRate) { // 2 second of mic muted
+                                    if (!silenceDetected) {
+                                        silenceDetected = true;
+                                        Post(MUTED, null);
+                                    }
+                                } else {
+                                    Post(UNMUTED, null);
+                                    silenceDetected = false;
+                                }
                             }
                         }
                     } catch (final RuntimeException e) {
@@ -335,6 +356,12 @@ public class AudioApplication extends com.github.axet.audiolibrary.app.MainAppli
             }
         }
 
+        public boolean isForeground() {
+            synchronized (bufferSizeLock) {
+                return bufferSize == this.samplesUpdate * Sound.getChannels(context);
+            }
+        }
+
         public void Post(Exception e) {
             Post(ERROR, e);
         }
diff --git a/app/src/main/java/com/github/axet/audiorecorder/app/Storage.java b/app/src/main/java/com/github/axet/audiorecorder/app/Storage.java
index 2801a7b..f4912fc 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/app/Storage.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/app/Storage.java
@@ -23,6 +23,7 @@ public class Storage extends com.github.axet.audiolibrary.app.Storage {
         super(context);
     }
 
+    @Override
     public Uri getNewFile() {
         SharedPreferences shared = PreferenceManager.getDefaultSharedPreferences(context);
         String ext = shared.getString(AudioApplication.PREFERENCE_ENCODING, "");
@@ -36,9 +37,9 @@ public class Storage extends com.github.axet.audiolibrary.app.Storage {
         Uri path = getStoragePath();
         String s = path.getScheme();
 
-        if (Build.VERSION.SDK_INT >= 21 && s.startsWith(ContentResolver.SCHEME_CONTENT)) {
+        if (Build.VERSION.SDK_INT >= 21 && s.equals(ContentResolver.SCHEME_CONTENT)) {
             return getNextFile(context, path, format, ext);
-        } else if (s.startsWith(ContentResolver.SCHEME_FILE)) {
+        } else if (s.equals(ContentResolver.SCHEME_FILE)) {
             File f = getFile(path);
             if (!f.exists() && !f.mkdirs())
                 throw new RuntimeException("Unable to create: " + path);
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 66b6213..747ca4e 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-el/strings.xml b/app/src/main/res/values-el/strings.xml
index edfefd2..9174425 100644
--- a/app/src/main/res/values-el/strings.xml
+++ b/app/src/main/res/values-el/strings.xml
@@ -61,4 +61,7 @@
     <string name="hold_by_bluetooth">παύση (αποσύνδεση bluetooth)</string>
     <string name="menu_search">Αναζήτηση</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 0254b95..ea95c66 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pausar (bluetooth desconectado)</string>
     <string name="menu_search">Buscar</string>
     <string name="save_as_wav">Guardar como WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 7ea4552..8556288 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-id/strings.xml b/app/src/main/res/values-id/strings.xml
index b0eade6..9acc6cc 100644
--- a/app/src/main/res/values-id/strings.xml
+++ b/app/src/main/res/values-id/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">jeda (bluetooth terputus)</string>
     <string name="menu_search">Cari</string>
     <string name="save_as_wav">Simpan sebagai WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 48d6d2e..e923b68 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 68c0991..ecef4f5 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index 759575f..1d38aae 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pauza (bluetooth rozłaczony)</string>
     <string name="menu_search">Szukaj</string>
     <string name="save_as_wav">Zapisz jako WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index 4b81293..63c48dc 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 9307d66..da00e03 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -67,4 +67,7 @@
     <string name="pref_fly_summary">Кодирование на лету отключает редактирование и восстановление в случае ошибок</string>
     <string name="menu_search">Поиск</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-sk/strings.xml b/app/src/main/res/values-sk/strings.xml
index 1e128dc..a72fa6d 100644
--- a/app/src/main/res/values-sk/strings.xml
+++ b/app/src/main/res/values-sk/strings.xml
@@ -69,4 +69,7 @@
     <string name="hold_by_bluetooth">Pozastavené (odpojené bluetooth)</string>
     <string name="menu_search">Hľadať</string>
     <string name="save_as_wav">Uložiť vo formáte WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rCH/strings.xml b/app/src/main/res/values-zh-rCH/strings.xml
index f0483ff..f9abea7 100644
--- a/app/src/main/res/values-zh-rCH/strings.xml
+++ b/app/src/main/res/values-zh-rCH/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">暂停 (蓝牙未连接)</string>
     <string name="menu_search">搜索</string>
     <string name="save_as_wav">另存为WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c1fbdbd..4194e73 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -67,4 +67,7 @@
     <string name="hold_by_bluetooth">pause (bluetooth disconnected)</string>
     <string name="menu_search">Search</string>
     <string name="save_as_wav">Save as WAV</string>
+    <string name="auto_close">Auto close in (%1$d)</string>
+    <string name="mic_muted_error">Mic muted</string>
+    <string name="mic_muted_pie">Android Pie and above prevent idle background apps from using microphone. Please disable selinux or install previous android version!</string>
 </resources>