public class MyWebview extends WebView {
  public MyWebview(Context context) {
    super(context);
  }
 
  public MyWebview(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
 
  public MyWebview(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
  }
 
  @Override
  public boolean onTouchEvent(MotionEvent event) {
    return false;
  }
}

@Override
  protected void onDestroy() {
    super.onDestroy();
    if(webview_projectinfo != null){
      webview_projectinfo.removeAllViews();
      webview_projectinfo.destroy();
      webview_projectinfo = null;
      ll_webview.removeAllViews();
      ll_webview = null;
    }
}