Fragment之间的跳转

android中在fragment A里面点击button跳转到fragment B怎么实现？

方法一：直接getActivity，使用activity的fragmenttransation的replace方法替换

假设

class OneFragment extends Fragment{    private Button btn;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.frag_one, null);        btn = (Button)view.findViewById(R.id.button);        btn.setOnClickListener(new OnClickListener() {                         @Override            public void onClick(View v) {                FragmentManager fm = getActivity().getFragmentManager();                fm.beginTransaction()                //替换为TwoFragment                .replace(R.layout.fragment_container,new TwoFragment())                .commit();            }        });        return super.onCreateView(inflater, container, savedInstanceState);    }}

但是这样做会使OneFragment和原activity的耦合度提高,fragment设计出来就是有重用的目的，所以不好，使用方法二

方法2：定义回调函数，当button按下调用回调

class OneFragment extends Fragment{    private Button btn;    private OnButtonClick onButtonClick;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.frag_one, null);        btn = (Button)view.findViewById(R.id.button);        btn.setOnClickListener(new OnClickListener() {                         @Override            public void onClick(View v) {                if(onButtonClick!=null){                    onButtonClick.onClick(btn);                }            }        });        return super.onCreateView(inflater, container, savedInstanceState);    }    public OnButtonClick getOnButtonClick() {        return onButtonClick;    }    public void setOnButtonClick(OnButtonClick onButtonClick) {        this.onButtonClick = onButtonClick;    }    public interface OnButtonClick{        public void onClick(View view);    }}

这样只要在acitivty中设置回调即可

public class MainActivity extends Activity {     private OneFragment oneFragment = new OneFragment();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //。。。        //。。。省略代码        oneFragment.setOnButtonClick(new OnButtonClick() {                         @Override            public void onClick(View view) {                //切换到TwoFragment                fm.beginTransaction()                //替换为TwoFragment                .replace(R.layout.fragment_container,new TwoFragment())                .commit();            }        });    }}

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