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 1c5351a..1494c27 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
@@ -10,7 +10,6 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
-import android.graphics.Point;
 import android.graphics.drawable.ColorDrawable;
 import android.media.AudioFormat;
 import android.media.AudioRecord;
@@ -28,7 +27,6 @@ import android.telephony.PhoneStateListener;
 import android.telephony.TelephonyManager;
 import android.util.DisplayMetrics;
 import android.util.Log;
-import android.view.Display;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowManager;
@@ -37,8 +35,8 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import com.github.axet.audiorecorder.R;
 import com.github.axet.androidlibrary.animations.MarginBottomAnimation;
+import com.github.axet.audiorecorder.R;
 import com.github.axet.audiorecorder.app.MainApplication;
 import com.github.axet.audiorecorder.app.RawSamples;
 import com.github.axet.audiorecorder.app.Sound;
@@ -787,6 +785,7 @@ public class RecordingActivity extends AppCompatActivity {
         d.setTitle(getString(R.string.encoding_title));
         d.setMessage(".../" + targetFile.getName());
         d.setMax(100);
+        d.setCancelable(false);
         d.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
         d.setIndeterminate(false);
         d.show();
diff --git a/build.gradle b/build.gradle
index 9ec4ac9..da6b171 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.0-rc2'
+        classpath 'com.android.tools.build:gradle:2.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files