android–Viewpager,Cursor和Fragment

概述我是viewpager的新手,想知道是否有人可以指向我使用带有片段和数据库的viewpager的项目的教程或源代码.我已经看过PagerAdapters的例子,但我只是没有得到它们如何一起工作(Cursor,Fragment和PagerAdapter)提前致谢.解决方法:我在与您的问题相关的其他帖子中发布了一些答案.以下是

我是vIEwpager的新手,想知道是否有人可以指向我使用带有片段和数据库的vIEwpager的项目的教程或源代码.我已经看过PagerAdapters的例子,但我只是没有得到它们如何一起工作(Cursor,Fragment和PagerAdapter)

提前致谢.

解决方法:

我在与您的问题相关的其他帖子中发布了一些答案.

以下是您可能会发现有用的一些链接.

第一个链接：在每个页面幻灯片中获取自定义视图. (接受的答案)

Android:How to create different view in ViewPager?

第二：如何在VIEwPager中正确使用片段. (接受的答案)

How to properly use fragments with ViewPager?

如果这两个链接没有用,请试试这个：

public class AllActivitIEs extends FragmentActivity implements Actionbar.TabListener {    public VIEwPager vIEwPager;    private AllPagesAdapter mAdapter;    private Actionbar actionbar;    private String [] tabs = {"AndroID","CoreJava","J2EE","Database","Web Services"};    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        //Initializing all stuff        vIEwPager = (VIEwPager)findVIEwByID(R.ID.pager);        actionbar = getActionbar();        mAdapter = new AllPagesAdapter(getSupportFragmentManager());        vIEwPager.setAdapter(mAdapter);        actionbar.setHomebuttonEnabled(true);        actionbar.setNavigationMode(Actionbar.NAVIGATION_MODE_TABS);        //Add the tabs here        for(String tab_name:tabs){            actionbar.addTab(actionbar.newTab().setText(tab_name).setTabListener(this));        }        vIEwPager.setonPagechangelistener(new VIEwPager.SimpleOnPagechangelistener(){            @OverrIDe        public voID onPageSelected(int position){                //on Page change, that particular page should be selected                actionbar.setSelectednavigationItem(position);            }            @OverrIDe                public voID onPageScrolled(int arg0,float arg1,int arg2){            }            @OverrIDe        public voID onPageScrollStateChanged(int position){            }        });    }    @OverrIDe    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @OverrIDe    public voID onTabSelected(Tab tab, FragmentTransaction fragmentTransaction) {        vIEwPager.setCurrentItem(tab.getposition());    }    @OverrIDe    public voID onTabUnselected(Tab tab, FragmentTransaction fragmentTransaction) {    }    @OverrIDe    public voID onTabReselected(Tab tab, FragmentTransaction fragmentTransaction) {        vIEwPager.setCurrentItem(tab.getposition());    }}//This is one of the fragment and assume that ExpandableListvIEw is your List vIEw.. In both the cases, i am setting the adapter in the onActivityCreated() method.public class AndroID extends androID.support.v4.app.Fragment {    expandablelistadapter listadapter;    // private ExpandableListVIEw expListVIEw;    List<String> ListDataheader;    HashMap<String, List<String>> ListDataChild;    ListVIEw lv1;    private static final String QUESTION = "question";    private static final String ANSWERS = "answer";    // ArrayList<HashMap<String, String>> JsonList = new ArrayList<HashMap<String, String>>();    @OverrIDe    public VIEw onCreateVIEw(LayoutInflater inflater, VIEwGroup container,                             Bundle savedInstanceState) {        VIEw mikevIEw = inflater.inflate(R.layout.androIDlayout, container, false);        return mikevIEw;    }    @OverrIDe    public voID onActivityCreated(Bundle savedInstanceState) {        super.onActivityCreated(savedInstanceState);        ExpandableListVIEw expListVIEw = null;        try{            expListVIEw = (ExpandableListVIEw) getActivity().findVIEwByID(R.ID.androIDExpandableList);            }        catch (Exception e){            e.printstacktrace();        }        new Thread(){            @OverrIDe            public voID run(){            }        }.start();        try {            setParent();            prepareChild();        } catch (Exception e) {            e.printstacktrace();        }        expandablelistadapter listadapter = new expandablelistadapter(getActivity(), ListDataheader, ListDataChild);        expListVIEw.setAdapter(listadapter);        // ListvIEw on child click Listener        expListVIEw.setonChildClickListener(new ExpandableListVIEw.OnChildClickListener() {            @OverrIDe            public boolean onChildClick(ExpandableListVIEw parent, VIEw v,                                        int groupposition, int childposition, long ID) {                /*Toast.makeText(                        getActivity(),                        ListDataheader.get(groupposition)                                + " : "                                + ListDataChild.get(                                ListDataheader.get(groupposition)).get(                                childposition), Toast.LENGTH_SHORT)                        .show();*/                return true;            }        });        // ListvIEw Group expanded Listener        expListVIEw.setonGroupExpandListener(new ExpandableListVIEw.OnGroupExpandListener() {            @OverrIDe            public voID onGroupExpand(int groupposition) {               /* Toast.makeText(getActivity(),                        ListDataheader.get(groupposition) + " Expanded",                        Toast.LENGTH_SHORT).show();*/            }        });        // ListvIEw Group collasped Listener        expListVIEw.setonGroupCollapseListener(new ExpandableListVIEw.OnGroupCollapseListener() {            @OverrIDe            public voID onGroupCollapse(int groupposition) {                /*Toast.makeText(getActivity(),                        ListDataheader.get(groupposition) + " Collapsed",                        Toast.LENGTH_SHORT).show();*/            }        });    }    public voID setParent(){        ListDataheader = new ArrayList<String>();        try{            JsONObject Json = new JsONObject(loadJsONFromAsset());            JsONArray array = Json.getJsONArray("AndroidQuestion");            for(int my =0;my<array.length();my++){                JsONObject c = array.getJsONObject(my);                String topics = c.getString(QUESTION);                ListDataheader.add(topics);            }        }        catch (JsONException e) {            e.printstacktrace();        }    }    public voID prepareChild() throws JsONException {        ListDataChild = new HashMap<String, List<String>>();        try{            JsONObject Json = new JsONObject(loadJsONFromAsset());            JsONArray array = Json.getJsONArray("AndroidQuestion");            for(int mz = 0;mz<array.length();mz++){                ArrayList<String> child = new ArrayList<String>();                JsONObject d = array.getJsONObject(mz);                String ans = d.getString(ANSWERS);                child = new ArrayList<String>();                child.add(ans);                int position = mz ;                ListDataChild.put(ListDataheader.get( position),child);            }        }        catch(JsONException e) {            e.printstacktrace();        }    }    public String loadJsONFromAsset() {        String Json = null;        try {            inputStream is = getActivity().getAssets().open("androID.Json");            int size = is.available();            byte[] buffer = new byte[size];            is.read(buffer);            is.close();            Json = new String(buffer, "UTF-8");        } catch (IOException ex) {            ex.printstacktrace();            return null;        }        return Json;    }}    //This is the adapter.    public class AllPagesAdapter extends FragmentStatePagerAdapter {            public AllPagesAdapter(FragmentManager fm) {                super(fm);            }            @OverrIDe            public Fragment getItem(int index) {        switch (index) {            case 0:                return new AndroID();            case 1:                return new CoreJava();            case 2:                return new J2EE();            case 3:                return new Database();            case 4:                return new WebServices();        }        return null;    }    @OverrIDe    public int getCount() {        return 5;    }}//This is the adapter for my expandable List vIEw.. in your case, your can just use the listadapter or any other adapter you want to use. This is just an optional part.public class expandablelistadapter extends Baseexpandablelistadapter {    private Context _context;    private List<String> _ListDataheader; // header Titles    // child data in format of header Title, child Title    private HashMap<String, List<String>> _ListDataChild;    public expandablelistadapter(Context context, List<String> ListDataheader,                                 HashMap<String, List<String>> ListChildData) {        this._context = context;        this._ListDataheader = ListDataheader;        this._ListDataChild = ListChildData;    }    @OverrIDe    public Object getChild(int groupposition, int childPosititon) {        return this._ListDataChild.get(this._ListDataheader.get(groupposition))                .get(childPosititon);    }    @OverrIDe    public long getChildID(int groupposition, int childposition) {        return childposition;    }    @OverrIDe    public VIEw getChildVIEw(int groupposition, final int childposition,                             boolean isLastChild, VIEw convertVIEw, VIEwGroup parent) {        final String childText = (String) getChild(groupposition, childposition);        if (convertVIEw == null) {            LayoutInflater inflater = (LayoutInflater) this._context                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);            convertVIEw = inflater.inflate(R.layout.newListitems,null);        }        TextVIEw txtListChild = (TextVIEw) convertVIEw                .findVIEwByID(R.ID.newListvIEwitems);        txtListChild.setText(childText);        return convertVIEw;    }    @OverrIDe    public int getChildrenCount(int groupposition) {        return this._ListDataChild.get(this._ListDataheader.get(groupposition))                .size();    }    @OverrIDe    public Object getGroup(int groupposition) {        return this._ListDataheader.get(groupposition);    }    @OverrIDe    public int getGroupCount() {        return this._ListDataheader.size();    }    @OverrIDe    public long getGroupID(int groupposition) {        return groupposition;    }    @OverrIDe    public VIEw getGroupVIEw(int groupposition, boolean isExpanded,                             VIEw convertVIEw, VIEwGroup parent) {        String headerTitle = (String) getGroup(groupposition);        if (convertVIEw == null) {            LayoutInflater myInflater = (LayoutInflater) this._context                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);            convertVIEw = myInflater.inflate(R.layout.newListgroup, null);        }        TextVIEw lblListheader = (TextVIEw) convertVIEw                .findVIEwByID(R.ID.newListvIEwgroup);        lblListheader.setTypeface(null, Typeface.BolD);        lblListheader.setText(headerTitle);        return convertVIEw;    }    @OverrIDe    public boolean hasStableIDs() {        return false;    }    @OverrIDe    public boolean isChildSelectable(int groupposition, int childposition) {        return true;    }}

Lemme知道你是否需要更多的例子.. 总结

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