Activity跳转Activity，Fragment切换下一个Fragment

一、Activity跳转下一个Activity

Login.java跳转到MainActivity.java，在Login.java的OnClick方法中

Intent intent = new Intent();
intent.setClass(Login.this, MainActivity.class);
startActivity(intent);

二、Fragment1切换下一个UserInfoFragment

确定这两个Fragment所在的Activity的布局ID：R.id.main_layout，实例化UserInfoFragment的对象

ly1.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
UserInfoFragment userFragment = new UserInfoFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.main_layout, userFragment);
transaction.addToBackStack(null);
transaction.commit();

}
});