ViewPager+Activity

做出的效果是QQ好友分组+ListView分组

实现代码如下：

有三个XML文件：

<ExpandableListView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/res_layout_ExpandableListView"        ></ExpandableListView>

<ListView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/res_layout_list"        ></ListView>

<android.support.v4.view.ViewPager    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/res_main_ViewPager"    >   </android.support.v4.view.ViewPager>

三个Java文件：

public class activity_ViewPage3 extends AppCompatActivity {    private ViewPager res_main_viewPager;    private List<View> list=new ArrayList<>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_view_page3);        res_main_viewPager = (ViewPager) findViewById(R.id.res_main_ViewPager);        LocalActivityManager lam=new LocalActivityManager(this,true);        lam.dispatchCreate(savedInstanceState);        Intent it1=new Intent(this,MainActivty2.class);        list.add(lam.startActivity("1",it1).getDecorView());        Intent it2=new Intent(this,MainActivty3.class);        list.add(lam.startActivity("1",it2).getDecorView());        res_main_viewPager.setAdapter(new MyAdapter());    }    class MyAdapter extends PagerAdapter{        @Override        public int getCount() {            return list.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view==object;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            View view = list.get(position);            container.addView(view);            return view;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            // super.destroyItem(container, position, object);            View v= list.get(position);            container.removeView(v);        }    }

public class MainActivty2 extends Activity {    private ListView res_layout_list;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activty3_mian);        res_layout_list = (ListView) findViewById(R.id.res_layout_list);        String[] list= new String[10];        for (int i = 0; i <list.length ; i++) {            list[i]="尹"+i+"样";        }        my m=new my<String>(this,android.R.layout.simple_list_item_1,list,new String[]{"浩0","浩4","浩7"});        res_layout_list.setAdapter(m);    }    class my<T> extends ArrayAdapter {        private List<T> object=new ArrayList<>();        private List<T> pam=new ArrayList<>();        public my(@NonNull Context context, @LayoutRes int resource,Object[] object,Object[] pam) {            super(context, resource,object);            for (int i = 0; i <object.length ; i++) {                this.object.add((T) object[i]);            }            for (int i = 0; i <pam.length ; i++) {                this.pam.add((T) pam[i]);            }        }        @Override        public boolean isEnabled(int position) {            if(pam.contains(object.get(position))){                return false;            }            return super.isEnabled(position);        }    }

public class MainActivty3 extends Activity {    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activty4_main);        ExpandableListView  res_layout_ExpandableListView= (ExpandableListView) findViewById(R.id.res_layout_ExpandableListView);        List<Map<String,Object>> list=new ArrayList<>();        List<List<Map<String,Object>>> l=new ArrayList<>();        for (int i = 0; i <4 ; i++) {            Map<String,Object> map=new HashMap<>();            map.put("text","组名:"+i);            list.add(map);            List<Map<String,Object>> ll=new ArrayList<>();            for (int j = 0; j <5 ; j++) {                Map<String,Object> map2=new HashMap<>();                map2.put("text2",i+"组第"+j+"个");                ll.add(map2);            }            l.add(ll);        }        SimpleExpandableListAdapter sel=new SimpleExpandableListAdapter(this,list,android.R.layout.simple_list_item_1,new String[]{"text"},                new int[]{android.R.id.text1},l,android.R.layout.simple_list_item_1,new String[]{"text2"},new int[]{android.R.id.text1});        res_layout_ExpandableListView.setAdapter(sel);    }