webview播放视频关闭声音问题

/**
 * 当Activity执行onPause()时让WebView执行pause
 */
@Override
public void onPause() {
    super.onPause();
    try {
        if (mWebNewsdetailsFragment != null) {
            mWebNewsdetailsFragment.getClass().getMethod("onPause").invoke(mWebNewsdetailsFragment, (Object[]) null);
            isOnPause = true;
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * 当Activity执行onResume()时让WebView执行resume
 */
@Override
public void onResume() {
    super.onResume();
    try {
        if (isOnPause) {
            if (mWebNewsdetailsFragment != null) {
                mWebNewsdetailsFragment.getClass().getMethod("onResume").invoke(mWebNewsdetailsFragment, (Object[]) null);
            }
            isOnPause = false;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * 该处的处理尤为重要:
 * 应该在内置缩放控件消失以后,再执行mWebView.destroy()
 * 否则报错WindowLeaked
 */
@Override
public void onDestroy() {
    super.onDestroy();
    if (mWebNewsdetailsFragment != null) {
        mWebNewsdetailsFragment.getSettings().setBuiltInZoomControls(true);
        mWebNewsdetailsFragment.setVisibility(View.GONE);
        long delayTime = ViewConfiguration.getZoomControlsTimeout();
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                Tools.runOnUI(new Runnable() {
                    @Override
                    public void run() {
                        if (mWebNewsdetailsFragment != null) {
                            mWebNewsdetailsFragment.destroy();
                            mWebNewsdetailsFragment = null;
                        }
                    }
                });

            }
        }, delayTime);

    }
    isOnPause = false;
}