Merge pull request #695 from thegobot/master

Update SrsCameraView.java

library/src/main/java/net/ossrs/yasea/SrsCameraView.java

@@ -145,13 +145,12 @@ public class SrsCameraView extends GLSurfaceView implements GLSurfaceView.Render
 
     public int[] setPreviewResolution(int width, int height) {                
         
-        if (mCamera == null) {
+        if (mCamera != null) {
-            mCamera = openCamera();
+            stopCamera();
-            if (mCamera == null) {
-                return new int[] { 0, 0};
-            }
         }
 
+        mCamera = openCamera();
+        
         mPreviewWidth = width;
         mPreviewHeight = height;
         Camera.Size rs = adaptPreviewResolution(mCamera.new Size(width, height));