Fragment间相互调用并传值

public class MainFragment extends Fragment {
    private static final String ARG_DATE="com.example.ting.datepickerfragment,date";
    private static final String TAG_DATE="DatePickerFragment";
    private static final int REQUEST_CODE=0;
    private  Button mButton;
    private Date mDate;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater,container,savedInstanceState);
        View v=inflater.inflate(R.layout.buttonview,container,false);
        mButton= (Button) v.findViewById(R.id.button_view);
        mDate= (Date) getArguments().getSerializable(ARG_DATE);
        mButton.setText(getArguments().getSerializable(ARG_DATE).toString()+"");
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                Toast.makeText(getActivity(),"请不要点我！",Toast.LENGTH_SHORT).show();
//                DialogFragment.
                FragmentManager fm=getFragmentManager()//获取目前的Fragment,由于是在Fragment可以直接获取，如果在activity中需要自己创建。
                DatePickerFragment datePickerFragment=DatePickerFragment.newInstance(mDate);
                datePickerFragment.setTargetFragment(MainFragment.this,REQUEST_CODE);//设置将要被启动Fragment的父Fragment.
                datePickerFragment.show(fm,TAG_DATE);//启动DialogFragment
            }
        });
//        mButton.setText("sdfsdfsdf");
        return v;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        mDate= (Date) data.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
        mButton.setText(mDate.toString());
    }

    public static MainFragment newInstance(Date date){
        Bundle bundle=new Bundle();//将当前数据绑定到Bundle,通过Arguments传入Fragment
        bundle.putSerializable(ARG_DATE,date);
        MainFragment fragment=new MainFragment();
        fragment.setArguments(bundle);
        return fragment;
    }
}

/****************************************************/

public class DatePickerFragment extends DialogFragment {
    private static final String BUNDLE_DATE = "com.example.ting.datepickerfragment.date";
    public static final String EXTRA_DATE="com.example.ting.datepickerfragment.date";
    private DatePicker mDatePicker;
    private Date date;

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {//返回对话框样式
        super.onCreateDialog(savedInstanceState);
        View v = LayoutInflater.from(getActivity()).inflate(R.layout.date_picker, null);
        mDatePicker = (DatePicker) v.findViewById(R.id.date_picker_view);
        date = (Date) getArguments().getSerializable(BUNDLE_DATE);
        mDatePicker.init(date.getYear(), date.getMonth(), date.getDay(), null);
　　　　//创建AlertDialog样式。
        return new AlertDialog.Builder(getActivity()).setTitle("Welcome").setView(v).setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Date mDate= new GregorianCalendar(mDatePicker.getYear(),mDatePicker.getMonth(),mDatePicker.getDayOfMonth()).getTime();
                Intent intent=new Intent(); 
                intent.putExtra(EXTRA_DATE,mDate);
                getTargetFragment().onActivityResult(getTargetRequestCode(), Activity.RESULT_OK,intent); 
//通过直接调用父Fragment的onActivityResult进行值传递。

//父Fragment通过实现onActivityResult方法来接收数据。

            }
        }).create();
    }

    public static DatePickerFragment newInstance(Date date) {
        Bundle bundle = new Bundle();//将值绑定Bundle 通过Arguments传入子Fragment
        bundle.putSerializable(BUNDLE_DATE, date);
        DatePickerFragment datePickerFragment = new DatePickerFragment();
        datePickerFragment.setArguments(bundle);
        return datePickerFragment;
    }
}