切换Fragment

private Fragment nowFragment;

/**
 * 切换Fragment
 *
 * @param fragment
 */
private void switchFragment(Fragment fragment) {
    FragmentTransaction transaction = fragmentManager.beginTransaction();
    if (nowFragment != null) {
        transaction.hide(nowFragment);
    }
    transaction.show(fragment).commit();
    nowFragment = fragment;
}

参考链接：

【Fragment】fragment之间的切换，add、show、hide