diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 3d3edab..317093e 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -17,7 +17,7 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity
-            android:name="net.ossrs.yasea.mplive.MainActivity"
+            android:name=".MainActivity"
             android:configChanges="orientation|screenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
diff --git a/app/src/main/java/com/xypower/mplive/MainActivity.java b/app/src/main/java/com/xypower/mplive/MainActivity.java
index dc193be..acf1d40 100644
--- a/app/src/main/java/com/xypower/mplive/MainActivity.java
+++ b/app/src/main/java/com/xypower/mplive/MainActivity.java
@@ -40,7 +40,7 @@ import java.util.Random;
 public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpListener,
                         SrsRecordHandler.SrsRecordListener, SrsEncodeHandler.SrsEncodeListener {
 
-    private static final String TAG = "Yasea";
+    private static final String TAG = "MpLive";
     public final static int RC_CAMERA = 100;
 
     private Button btnPublish;
@@ -92,7 +92,11 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
         }else{
             //权限已经开启，做相应事情
             isPermissionGranted = true;
-            init();
+            try {
+                init();
+            } catch (Exception ex) {
+                ex.printStackTrace();
+            }
         }
     }
 
@@ -104,7 +108,11 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
             if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                 //权限被用户同意,做相应的事情
                 isPermissionGranted = true;
-                init();
+                try {
+                    init();
+                } catch (Exception ex) {
+                    ex.printStackTrace();
+                }
             } else {
                 //权限被用户拒绝，做相应的事情
                 finish();
@@ -114,7 +122,7 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
 
     private void init() {
         // restore data.
-        sp = getSharedPreferences("Yasea", MODE_PRIVATE);
+        sp = getSharedPreferences("MpLive", MODE_PRIVATE);
         rtmpUrl = sp.getString("rtmpUrl", rtmpUrl);
 
         // initialize url.
@@ -138,9 +146,7 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
 
         mPublisher = new SrsPublisher(mCameraView);
 
-        if (intent.hasExtra("cameraId")) {
-            mPublisher.switchCameraFace(intent.getIntExtra("cameraId", 0));
-        }
+
 
         String url = intent.getStringExtra("url");
         if (!TextUtils.isEmpty(url)) {
@@ -153,9 +159,12 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
         mPublisher.setPreviewResolution(mWidth, mHeight);
         mPublisher.setOutputResolution(mHeight, mWidth); // 这里要和preview反过来
         mPublisher.setVideoHDMode();
+        if (intent.hasExtra("cameraId")) {
+            int cameraId = intent.getIntExtra("cameraId", 0);
+            mPublisher.switchCameraFace(cameraId);
+        }
         mPublisher.startCamera();
 
-
         mCameraView.setCameraCallbacksHandler(new SrsCameraView.CameraCallbacksHandler(){
             @Override
             public void onCameraParameters(Camera.Parameters params) {
@@ -180,6 +189,7 @@ public class MainActivity extends AppCompatActivity implements RtmpHandler.RtmpL
             mHandler.postDelayed(new Runnable() {
                 @Override
                 public void run() {
+                    Log.w(TAG, "Close self automatically");
                     finish();
                     System.exit(0);
                 }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index a769960..ad18a1c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
-    tools:context="net.ossrs.yasea.mplive.MainActivity">
+    tools:context="com.xypower.mplive.MainActivity">
 
     <net.ossrs.yasea.SrsCameraView
         android:layout_width="match_parent"
diff --git a/library/src/main/java/net/ossrs/yasea/SrsCameraView.java b/library/src/main/java/net/ossrs/yasea/SrsCameraView.java
index f3c45f5..c57962e 100644
--- a/library/src/main/java/net/ossrs/yasea/SrsCameraView.java
+++ b/library/src/main/java/net/ossrs/yasea/SrsCameraView.java
@@ -312,7 +312,9 @@ public class SrsCameraView extends GLSurfaceView implements GLSurfaceView.Render
     public void disableEncoding() {
         mIsEncoding = false;
         mGLIntBufferCache.clear();
-        mGLPreviewBuffer.clear();
+        if (mGLPreviewBuffer != null) {
+            mGLPreviewBuffer.clear();
+        }
 
         if (worker != null) {
             worker.interrupt();