diff --git a/README.md b/README.md
index 3ff1ac93..e01c42c7 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Step 1.Add it in your root build.gradle at the end of repositories:
 Step 2. Add the dependency
 
 	dependencies {
-	        compile 'com.github.dueeeke:dkplayer:1.4.1'
+	        compile 'com.github.dueeeke:dkplayer:1.4.2'
 	}
 ```
 或者将library下载并导入项目中使用
diff --git a/app/build.gradle b/app/build.gradle
index 77835311..27473ef3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,8 +12,8 @@ android {
         applicationId "com.dueeeke.dkplayer"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 8
-        versionName "1.4"
+        versionCode 10
+        versionName "1.4.2"
     }
 
 
diff --git a/app/src/main/java/com/dueeeke/dkplayer/activity/LivePlayerActivity.java b/app/src/main/java/com/dueeeke/dkplayer/activity/LivePlayerActivity.java
index d33f6419..533e54e8 100644
--- a/app/src/main/java/com/dueeeke/dkplayer/activity/LivePlayerActivity.java
+++ b/app/src/main/java/com/dueeeke/dkplayer/activity/LivePlayerActivity.java
@@ -103,6 +103,5 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 
     public void startFloatWindow(View view) {
         ijkVideoView.startFloatWindow();
-        finish();
     }
 }
diff --git a/library/src/main/java/com/dueeeke/videoplayer/player/BaseIjkVideoView.java b/library/src/main/java/com/dueeeke/videoplayer/player/BaseIjkVideoView.java
index c0a44d6d..18ab7e5b 100644
--- a/library/src/main/java/com/dueeeke/videoplayer/player/BaseIjkVideoView.java
+++ b/library/src/main/java/com/dueeeke/videoplayer/player/BaseIjkVideoView.java
@@ -9,6 +9,7 @@
 import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.view.OrientationEventListener;
+import android.view.WindowManager;
 import android.widget.FrameLayout;
 
 import com.danikula.videocache.CacheListener;
@@ -35,6 +36,8 @@
 public abstract class BaseIjkVideoView extends FrameLayout implements BaseVideoController.MediaPlayerControl, MediaEngineInterface {
 
     protected BaseMediaEngine mMediaPlayer;//播放引擎
+    @Nullable
+    protected BaseVideoController mVideoController;//控制器
     protected VideoListener listener;
     protected int bufferPercentage;//缓冲百分比
     protected boolean isMute;//是否静音
@@ -78,7 +81,8 @@ public abstract class BaseIjkVideoView extends FrameLayout implements BaseVideoC
 
         @Override
         public void onOrientationChanged(int orientation) {
-            Activity activity = WindowUtil.scanForActivity(getContext());
+            if (mVideoController == null) return;
+            Activity activity = WindowUtil.scanForActivity(mVideoController.getContext());
             if (activity == null) return;
             if (orientation >= 340) { //屏幕顶部朝上
                 if (mAlwaysFullScreen || isLockFullScreen || !mAutoRotate) return;
@@ -338,6 +342,8 @@ private void startBackgroundService() {
         intent.putExtra(KeyUtil.ENABLE_CACHE, isCache);
         intent.putExtra(KeyUtil.ACTION, Constants.COMMAND_START);
         getContext().getApplicationContext().startService(intent);
+        Activity activity = WindowUtil.scanForActivity(getContext());
+        if (activity != null) activity.finish();
     }
 
     /**
diff --git a/library/src/main/java/com/dueeeke/videoplayer/player/IjkVideoView.java b/library/src/main/java/com/dueeeke/videoplayer/player/IjkVideoView.java
index 234cc143..94d7a312 100644
--- a/library/src/main/java/com/dueeeke/videoplayer/player/IjkVideoView.java
+++ b/library/src/main/java/com/dueeeke/videoplayer/player/IjkVideoView.java
@@ -34,9 +34,6 @@
  */
 
 public class IjkVideoView extends BaseIjkVideoView {
-
-    @Nullable
-    protected BaseVideoController mVideoController;//控制器
     protected ResizeSurfaceView mSurfaceView;
     protected ResizeTextureView mTextureView;
     protected SurfaceTexture mSurfaceTexture;
@@ -221,7 +218,8 @@ public void release() {
 
     @Override
     public void startFullScreen() {
-        Activity activity = WindowUtil.scanForActivity(getContext());
+        if (mVideoController == null) return;
+        Activity activity = WindowUtil.scanForActivity(mVideoController.getContext());
         if (activity == null) return;
         if (isFullScreen) return;
         WindowUtil.hideSystemBar(getContext());
@@ -234,12 +232,13 @@ public void startFullScreen() {
         contentView.addView(playerContainer, params);
         orientationEventListener.enable();
         isFullScreen = true;
-        if (mVideoController != null) mVideoController.setPlayerState(PLAYER_FULL_SCREEN);
+        mVideoController.setPlayerState(PLAYER_FULL_SCREEN);
     }
 
     @Override
     public void stopFullScreen() {
-        Activity activity = WindowUtil.scanForActivity(getContext());
+        if (mVideoController == null) return;
+        Activity activity = WindowUtil.scanForActivity(mVideoController.getContext());
         if (activity == null) return;
         if (!isFullScreen) return;
         if (!mAutoRotate) orientationEventListener.disable();