Activity、Fragment、ViewPage

1、新建super

//super提供统一的FragmentActivity入口。
public abstract class SuperFragmentActivity extends FragmentActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragmentlistactivity);
        FragmentManager fm=getSupportFragmentManager();
        Fragment fragment=fm.findFragmentById(R.id.mainfragment);
        if (fragment == null){
            fragment=createFragment();
            fm.beginTransaction().add(R.id.mainfragment,fragment).commit();
        }
    }
    public abstract Fragment createFragment();
}
//接上一个项目，创建好列表
//FragmentListActivity

public class FragmentListActivity extends SuperFragmentActivity{


    @Override
    public Fragment createFragment() {//实现super中的方法
        return new StudentListFragment();
    }
}
//创建ListFragment

public class StudentListFragment extends Fragment implements View.OnClickListener {
    private TextView mNameTextView;
    private TextView mAgeTextView;
    private List<Student> mStudents;
    private Student mStudent;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        View view=inflater.inflate(R.layout.recyclistview, container,false);
        RecyclerView recyclerView= (RecyclerView) view.findViewById(R.id.recycleview);//Fragment绑定RecycleView
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerView.setAdapter(new RecycleAdpter());
        return view;
    }

    @Override
    public void onClick(View v) {
        startActivity(viewpageActivity.newIntent(getActivity(),mStudent.getNum()));//当被点击时启动启动另一个FragmentActivity
    }

    private class RecycleAdpter extends RecyclerView.Adapter<RecyclerViewHolder> {

    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater=LayoutInflater.from(getActivity());
        View v=inflater.inflate(R.layout.studentview,parent,false);
        return new RecyclerViewHolder(v);
    }

    @Override
    public void onBindViewHolder(RecyclerViewHolder holder, int position) {
        mStudent=mStudents.get(position);
        mNameTextView.setText(mStudent.getName());
        mAgeTextView.setText(mStudent.getAge()+"");
    }

    @Override
    public int getItemCount() {
        mStudents=StudentList.get();
        return mStudents.size();
    }
}
    private class RecyclerViewHolder extends RecyclerView.ViewHolder{

        public RecyclerViewHolder(View itemView) {
            super(itemView);
            mAgeTextView= (TextView) itemView.findViewById(R.id.age_textview);
            mNameTextView= (TextView) itemView.findViewById(R.id.name_textview);
            itemView.setOnClickListener(StudentListFragment.this);
        }
    }

}

2、FragmentActivity绑定ViewPage

public class ViewpageActivity extends FragmentActivity {
    private static final String EXTRA_INDEX = "com.example.ting.criminalintentpractise.viewpage";
    private ViewPager mViewPager;
    private List<Student> mStudentList;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_viewpage);  
        mViewPager = (ViewPager) findViewById(R.id.viewpage);
        FragmentManager fm = getSupportFragmentManager();
        int num = getIntent().getIntExtra(EXTRA_INDEX, 0);
        mStudentList=StudentList.get();
        mViewPager.setAdapter(new FragmentStatePagerAdapter(fm) {//将样式文件中的viewpager绑定到一个fragment
            @Override
　　　　　　　　//滚动的位置
            public Fragment getItem(int position) { 
                return StudentFragment.newInstance(position);
            }
            @Override
　　　　　　　　//总的滚动页数
            public int getCount() {
                return StudentList.get().size();
            }
        });
        mViewPager.setCurrentItem(num); //设置滚动起始页
    }

    public static Intent newIntent(Context context, int index) {
        Intent intent = new Intent(context, ViewpageActivity.class);
        intent.putExtra(EXTRA_INDEX, index);
        return intent;
    }
}
3、新建Fragment

public class StudentFragment extends Fragment {
    private TextView mNameTextView;
    private TextView mAgeTextView;
    private static String ARG_INDEX = "com.example.ting.criminalintentpractise.student";
    private int num;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        View v = inflater.inflate(R.layout.studentview, container, false);//启动自身的样式文件
        mNameTextView = (TextView) v.findViewById(R.id.name_textview);
        mAgeTextView = (TextView) v.findViewById(R.id.age_textview);
        List<Student> list = StudentList.get();
        mNameTextView.setText(list.get(num).getName());
        mAgeTextView.setText(list.get(num).getAge()+"");
        return v;
    }
//为启动该Fragment封装启动参数
    public static StudentFragment newInstance(int index) {
        Bundle bundle = new Bundle();
        bundle.putInt(ARG_INDEX, index);
        StudentFragment fragment = new StudentFragment();
        fragment.setArguments(bundle);//通过Arguments将参数传入Fragment
        return fragment;
    }
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        num = getArguments().getInt(ARG_INDEX); //接收Activity传入的参数
    }
}

4、心得
Intent和Arguments和Bundle关系
1、Activity间相互传质使用Intent。
2、Activity和Fragment间传值使用Arguments。
3、Intent和Arguments传值都是封装在Bundle中进行的，Bundle是Intent和Argument传值的载体。