android webview 播放视频全屏卡住,Android webview中视频点击全屏按钮后立即闪回原始大小，无法全屏，原因可能是什么？...

@Override

public void onShowCustomView(View view, CustomViewCallback callback) {

if (mCustomView != null) {

if(callback != null){

callback.onCustomViewHidden();

}

return;

}

FrameLayout decorView = (FrameLayout) this.activity.getWindow().getDecorView();

fullscreenContainer = new FullscreenHolder(this.activity);

fullscreenContainer.addView(view, COVER_SCREEN_PARAMS);

decorView.addView(fullscreenContainer, COVER_SCREEN_PARAMS);

mCustomView = view;

this.toolbar.setVisibility(View.GONE);

mCustomViewCallback = callback;

}

@Override

public void onHideCustomView() {

if (mCustomView == null) return;

this.toolbar.setVisibility(View.VISIBLE);

FrameLayout decorView = (FrameLayout) this.activity.getWindow().getDecorView();

decorView.removeView(fullscreenContainer);

fullscreenContainer = null;

mCustomView = null;

mCustomViewCallback.onCustomViewHidden();

this.webView.getView().setVisibility(View.VISIBLE);

}

上面是重写的视频全屏方法，请各位看看是否有什么问题？如果没有问题可能是其他什么原因？