工厂模式下add replace show hide fragment 还有Activity fragment生命周期

效果 依赖 compile 'com.ashokvarma.android:bottom-navigation-bar:1.3.0' OnCreate中初始化 initBottom(); 认选中0 showFragment(0); 然后具体实现 private void showFragment(int position) { FragmentManager supportFragmentManager = getSupportFragmentManager();