本文介绍了我怎么能叫用抽屉式导航我的活动之一吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有我的抽屉式导航活性我MainActivity类别和我已经有Homepage.class活动previously的。由于导航抽屉使用的片段,我无法通过抽屉调用HomePage类。 PLZ帮我。

下面是我的code的抽屉 -

 公共类MainActivity延伸活动{
私人DrawerLayout mDrawerLayout;
私人的ListView mDrawerList;
私人ActionBarDrawerToggle mDrawerToggle;//导航抽屉称号
私人CharSequence的mDrawerTitle;//用于存储应用程序标题
私人CharSequence的mTitle;//滑动菜单项
私有String [] navMenuTitles;
私人TypedArray navMenuIcons;私人的ArrayList< NavDrawerItem> navDrawerItems;
私人NavDrawerListAdapter适配器;@燮pressLint(NewApi)
@覆盖
保护无效的onCreate(捆绑savedInstanceState){
    super.onCreate(savedInstanceState);
    的setContentView(R.layout.activity_main);    mTitle = mDrawerTitle =的getTitle();    //负荷滑动菜单项
    navMenuTitles = getResources()getStringArray(R.array.nav_drawer_items)。    从资源//导航抽屉图标
    navMenuIcons = getResources()
            .obtainTypedArray(R.array.nav_drawer_icons);    mDrawerLayout =(DrawerLayout)findViewById(R.id.drawer_layout);
    mDrawerList =(ListView控件)findViewById(R.id.list_slidermenu);    navDrawerItems =新的ArrayList< NavDrawerItem>();    //添加导航抽屉里的物品数组
    //首页
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [0],navMenuIcons.getResourceId(0,-1)));
    //找人
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [1],navMenuIcons.getResourceId(1,-1)));
    // 相片
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [2],navMenuIcons.getResourceId(2,-1)));
    //社区,这里将添加计数器
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [3],navMenuIcons.getResourceId(3,-1),真的,22));
    //网页
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [4],navMenuIcons.getResourceId(4,-1)));
    //什么是热的,我们将在这里添加计数器
    navDrawerItems.add(新NavDrawerItem(navMenuTitles [5],navMenuIcons.getResourceId(5,-1),真的,50+));
    //回收类型数组
    navMenuIcons.recycle();    mDrawerList.setOnItemClickListener(新SlideMenuClickListener());    //设置导航抽屉名单适配器
    适配器=新NavDrawerListAdapter(getApplicationContext()
            navDrawerItems);
    mDrawerList.setAdapter(适配器);    //使操作栏中的应用程序图标和行为作为切换按钮
    getActionBar()setDisplayHomeAsUpEnabled(真)。
    getActionBar()setHomeButtonEnabled(真)。    mDrawerToggle =新ActionBarDrawerToggle(这一点,mDrawerLayout,
            R.drawable.ic_drawer,//导航菜单切换图标
            R.string.app_name,//导航抽屉打开 - 描述的可访问性
            R.string.app_name //导航抽屉接近 - 描述的可访问性
    ){
        公共无效onDrawerClosed(查看视图){
            。getActionBar()的setTitle(mTitle);
            //调用prepareOptionsMenu()来显示操作栏图标
            invalidateOptionsMenu();
        }        公共无效onDrawerOpened(查看drawerView){
            。getActionBar()的setTitle(mDrawerTitle);
            //调用prepareOptionsMenu()隐藏操作栏图标
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);    如果(savedInstanceState == NULL){
        //对第一个项目的资产净值首次显示视图
        displayView(0);
    }
}/ **
 *滑动菜单项,点击监听器
 * * /
私有类SlideMenuClickListener工具
        ListView.OnItemClickListener {
    @覆盖
    公共无效onItemClick(适配器视图<>母公司,观景,INT位置,
            长ID){
        //选定导航抽屉项显示视图
        displayView(位置);
    }
}@覆盖
公共布尔onCreateOptionsMenu(菜单菜单){
    。getMenuInflater()膨胀(R.menu.main,菜单);
    返回true;
}@覆盖
公共布尔onOptionsItemSelected(菜单项项){
    //切换上选择操作栏中的应用程序图标/标题导航抽屉
    如果(mDrawerToggle.onOptionsItemSelected(项目)){
        返回true;
    }
    //处理操作栏中点击动作
    开关(item.getItemId()){
    案例R.id.action_settings:
        返回true;
    默认:
        返回super.onOptionsItemSelected(项目);
    }
}/ * *
 *时调用invalidateOptionsMenu()被触发
 * /
@覆盖
prepareOptionsMenu(菜单菜单)上公共布尔{
    //如果导航抽屉被打开,隐藏行动项目
    布尔drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_settings).setVisible(drawerOpen!);
    返回super.on prepareOptionsMenu(菜单);
}/ **
 所选导航抽屉列表项* Diplaying片段视图
 * * /
私人无效displayView(INT位置){
    //更新替换片段的主要内容
    片段片段= NULL;
    开关(位置){
    情况下0:
        片段=新HomeFragment();
        打破;
    情况1:
        片段=新FindPeopleFragment();
        打破;
    案例2:
        片段=新PhotosFragment();
        打破;
    案例3:
        片段=新CommunityFragment();
        打破;
    情况4:
        片段=新PagesFragment();
        打破;
    情况5:
        片段=新WhatsHotFragment();
        打破;    默认:
        打破;
    }    如果(片段!= NULL){
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container,片段).commit();        //更新所选项目和标题,然后关上抽屉
        mDrawerList.setItemChecked(位置,真正的);
        mDrawerList.setSelection(位置);
        (navMenuTitles [位置])的setTitle;
        mDrawerLayout.closeDrawer(mDrawerList);
    }其他{
        //错误创建片段
        Log.e(MainActivity,出错创建片段);
    }
}@覆盖
公共无效的setTitle(CharSequence的标题){
    mTitle =称号;
    。getActionBar()的setTitle(mTitle);
}/ **
 *当使用ActionBarDrawerToggle,你必须在调用它
 * onPostCreate()和onConfigurationChanged()...
 * /@覆盖
保护无效onPostCreate(捆绑savedInstanceState){
    super.onPostCreate(savedInstanceState);
    //同步onRestoreInstanceState后切换状态已经发生。
    mDrawerToggle.syncState();
}@覆盖
公共无效onConfigurationChanged(配置NEWCONFIG){
    super.onConfigurationChanged(NEWCONFIG);
    //把任何配置更改抽屉toggls
    mDrawerToggle.onConfigurationChanged(NEWCONFIG);
}

}

我的一个片段 -

 公共类HomeFragment扩展片段{公共HomeFragment(){}@覆盖
公共查看onCreateView(LayoutInflater充气器,容器的ViewGroup,
        捆绑savedInstanceState){    意向意图=新的Intent();
    intent.setClass(getActivity(),HomePage.class);
    startActivity(意向);
    查看rootView = inflater.inflate(R.layout.activity_main,集装箱,FALSE);    返回rootView;
     }

首页活动,我要的是点击导航抽屉项时调用:

 公共类首页扩展MainActivity {
私有静态最后弦乐TAG = MainActivity.class.getSimpleName();
私人的ListView ListView的;
私人FeedListAdapter listAdapter;
私人列表< FeedItem> feedItems;
私人字符串URL_FEED = \"https://gist.githubusercontent.com/anonymous/e6c3336c57bf40c794ab/raw/022058ac0ceafd15bfed89a72e6b741dd84da130/blob.json\";
@覆盖
保护无效的onCreate(捆绑savedInstanceState){
    super.onCreate(savedInstanceState);
   的setContentView(R.layout.fragment_home);    ListView控件=(ListView控件)findViewById(R.id.list);    feedItems =新的ArrayList< FeedItem>();    listAdapter =新FeedListAdapter(这一点,feedItems);
    listView.setAdapter(listAdapter);    //并不需要这两行,
    //只是为了让Facebook的外观(改变背景颜色和放大器;隐藏的图标)
    getActionBar()setBackgroundDrawable(新ColorDrawable(Color.parseColor(#EF7B00)))。
  // getActionBar()的setIcon(
              //新ColorDrawable(getResources()的getColor(android.R.color.transparent)));    //我们首先检查缓存请求
    缓存缓存= AppController.getInstance()getRequestQueue()getCache()。
    中入口= cache.get(URL_FEED);
    如果(入门!= NULL){
        //获取从缓存中的数据
        尝试{
            字符串数据=新的String(entry.data,UTF-8);
            尝试{
                parseJsonFeed(新的JSONObject(数据));
            }赶上(JSONException E){
                e.printStackTrace();
            }
        }赶上(UnsupportedEncodingException五){
            e.printStackTrace();
        }    }其他{
        //使新鲜的凌空请求,并得到JSON
        JsonObjectRequest jsonReq =新JsonObjectRequest(Method.GET,
                URL_FEED,空,新Response.Listener<&JSONObject的GT;(){                    @覆盖
                    公共无效onResponse(JSONObject的响应){
                        VolleyLog.d(TAG,回应:+ response.toString());
                        如果(响应!= NULL){
                            parseJsonFeed(响应);
                        }
                    }
                },新Response.ErrorListener(){                    @覆盖
                    公共无效onErrorResponse(VolleyError错误){
                        VolleyLog.d(TAG,错误:+ error.getMessage());
                    }
                });        //添加请求凌空请求队列
        。AppController.getInstance()addToRequestQueue(jsonReq);
    }}/ **
 *解析JSON作出反应并传递数据养活查看列表适配器
 * * /
私人无效parseJsonFeed(JSONObject的响应){
    尝试{
        JSONArray feedArray = response.getJSONArray(饲料);        的for(int i = 0; I< feedArray.length();我++){
            JSONObject的feedObj =(JSONObject的)feedArray.get(I)            FeedItem项目=新FeedItem();
            item.setId(feedObj.getInt(ID));
            item.setName(feedObj.getString(名字));            //图片可能为空有时
            字符串图像= feedObj.isNull(图像)?空:feedObj
                    .getString(图像);
            item.setImge(图片);
            item.setStatus(feedObj.getString(身份));
            item.setProfilePic(feedObj.getString(profilePic));
            item.setTimeStamp(feedObj.getString(时间戳));            // URL可能为空有时
            字符串feedUrl = feedObj.isNull(URL)?空:feedObj
                    .getString(URL);
            item.setUrl(feedUrl);            feedItems.add(项目);
        }        //通知数据的变化,列出adapater
        listAdapter.notifyDataSetChanged();
    }赶上(JSONException E){
        e.printStackTrace();
    }
}@覆盖
公共布尔onCreateOptionsMenu(菜单菜单){
    。getMenuInflater()膨胀(R.menu.main,菜单);
    返回true;
}    }

XML的抽屉:

 < android.support.v4.widget.DrawerLayout
    的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    机器人:ID =@ + ID / drawer_layout
    机器人:layout_width =match_parent
    机器人:layout_height =match_parent>    <! - 的FrameLayout显示片段 - >    <的FrameLayout
        机器人:ID =@ + ID / frame_container
        机器人:layout_width =match_parent
        机器人:layout_height =match_parent>    < /&的FrameLayout GT;    <! - 列表视图显示滑块菜单 - >    < ListView控件
        机器人:ID =@ + ID / list_slidermenu
        机器人:layout_width =240dp
        机器人:layout_height =match_parent
        机器人:layout_gravity =开始
        机器人:背景=@彩色/ list_background
        机器人:choiceMode =singleChoice
        机器人:分=@彩色/ list_divider
        机器人:dividerHeight =1DP
        机器人:listSelector =@绘制/ list_selector/>
< /android.support.v4.widget.DrawerLayout>

和最后的XML,我想被称为活动 -

 < LinearLayout中的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent>< ListView控件
    机器人:ID =@ + ID /列表
    机器人:layout_width =FILL_PARENT
    机器人:layout_height =WRAP_CONTENT
    机器人:分=@空/>    < / LinearLayout中>


解决方案

启动一个活动使用导航纸盒时,不会改变的API。你仍然只需要调用 startActivity()来推出不同的活动。

在这种情况下,您的code会是这个样子:

 私人无效displayView(INT位置){
    //更新替换片段的主要内容
    片段片段= NULL;
    开关(位置){
        案件0://或任何导航项目位置应该启动活动
            startActivity(新意图(这一点,HomePage.class));
            返回;        //你的情况下,其余
}

请注意,当调用后 startActivity()的主页项目,我们,而不是返回 让你的 displayView()不尝试更换显示的片段。

I have my navigation drawer activity as my MainActivity class and I already have Homepage.class activity previously made. Since Navigation Drawer uses Fragments, I am unable to call Homepage class through Drawer. Plz help me.

Here is my code for the Drawer-

public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

// nav drawer title
private CharSequence mDrawerTitle;

// used to store app title
private CharSequence mTitle;

// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;

private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;

@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTitle = mDrawerTitle = getTitle();

    // load slide menu items
    navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

    // nav drawer icons from resources
    navMenuIcons = getResources()
            .obtainTypedArray(R.array.nav_drawer_icons);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

    navDrawerItems = new ArrayList<NavDrawerItem>();

    // adding nav drawer items to array
    // Home
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
    // Find People
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
    // Photos
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
    // Communities, Will add a counter here
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true, "22"));
    // Pages
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
    // What's hot, We  will add a counter here
    navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1), true, "50+"));


    // Recycle the typed array
    navMenuIcons.recycle();

    mDrawerList.setOnItemClickListener(new SlideMenuClickListener());

    // setting the nav drawer list adapter
    adapter = new NavDrawerListAdapter(getApplicationContext(),
            navDrawerItems);
    mDrawerList.setAdapter(adapter);

    // enabling action bar app icon and behaving it as toggle button
    getActionBar().setDisplayHomeAsUpEnabled(true);
    getActionBar().setHomeButtonEnabled(true);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, //nav menu toggle icon
            R.string.app_name, // nav drawer open - description for accessibility
            R.string.app_name // nav drawer close - description for accessibility
    ) {
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(mTitle);
            // calling onPrepareOptionsMenu() to show action bar icons
            invalidateOptionsMenu();
        }

        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(mDrawerTitle);
            // calling onPrepareOptionsMenu() to hide action bar icons
            invalidateOptionsMenu();
        }
    };
    mDrawerLayout.setDrawerListener(mDrawerToggle);

    if (savedInstanceState == null) {
        // on first time display view for first nav item
        displayView(0);
    }
}

/**
 * Slide menu item click listener
 * */
private class SlideMenuClickListener implements
        ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // display view for selected nav drawer item
        displayView(position);
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // toggle nav drawer on selecting action bar app icon/title
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    // Handle action bar actions click
    switch (item.getItemId()) {
    case R.id.action_settings:
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

/* *
 * Called when invalidateOptionsMenu() is triggered
 */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // if nav drawer is opened, hide the action items
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

/**
 * Diplaying fragment view for selected nav drawer list item
 * */
private void displayView(int position) {
    // update the main content by replacing fragments
    Fragment fragment = null;
    switch (position) {
    case 0:
        fragment = new HomeFragment();
        break;
    case 1:
        fragment = new FindPeopleFragment();
        break;
    case 2:
        fragment = new PhotosFragment();
        break;
    case 3:
        fragment = new CommunityFragment();
        break;
    case 4:
        fragment = new PagesFragment();
        break;
    case 5:
        fragment = new WhatsHotFragment();
        break;

    default:
        break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}

@Override
public void setTitle(CharSequence title) {
    mTitle = title;
    getActionBar().setTitle(mTitle);
}

/**
 * When using the ActionBarDrawerToggle, you must call it during
 * onPostCreate() and onConfigurationChanged()...
 */

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggls
    mDrawerToggle.onConfigurationChanged(newConfig);
}

}

One of my fragments -

    public class HomeFragment extends Fragment {

public HomeFragment(){}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    Intent intent = new Intent();
    intent.setClass(getActivity(), HomePage.class);
    startActivity(intent);


    View rootView = inflater.inflate(R.layout.activity_main, container, false);



    return rootView;
     }

HomePage Activity which I want to call when item on navigation drawer is clicked :

    public class HomePage extends MainActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private ListView listView;
private FeedListAdapter listAdapter;
private List<FeedItem> feedItems;
private String URL_FEED = "https://gist.githubusercontent.com/anonymous/e6c3336c57bf40c794ab/raw/022058ac0ceafd15bfed89a72e6b741dd84da130/blob.json";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   setContentView(R.layout.fragment_home);

    listView = (ListView) findViewById(R.id.list);

    feedItems = new ArrayList<FeedItem>();

    listAdapter = new FeedListAdapter(this, feedItems);
    listView.setAdapter(listAdapter);

    // These two lines not needed,
    // just to get the look of facebook (changing background color & hiding the icon)
    getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#EF7B00")));
  //  getActionBar().setIcon(
              // new ColorDrawable(getResources().getColor(android.R.color.transparent)));

    // We first check for cached request
    Cache cache = AppController.getInstance().getRequestQueue().getCache();
    Entry entry = cache.get(URL_FEED);
    if (entry != null) {
        // fetch the data from cache
        try {
            String data = new String(entry.data, "UTF-8");
            try {
                parseJsonFeed(new JSONObject(data));
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

    } else {
        // making fresh volley request and getting json
        JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                URL_FEED, null, new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        VolleyLog.d(TAG, "Response: " + response.toString());
                        if (response != null) {
                            parseJsonFeed(response);
                        }
                    }
                }, new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError error) {
                        VolleyLog.d(TAG, "Error: " + error.getMessage());
                    }
                });

        // Adding request to volley request queue
        AppController.getInstance().addToRequestQueue(jsonReq);
    }

}

/**
 * Parsing json reponse and passing the data to feed view list adapter
 * */
private void parseJsonFeed(JSONObject response) {
    try {
        JSONArray feedArray = response.getJSONArray("feed");

        for (int i = 0; i < feedArray.length(); i++) {
            JSONObject feedObj = (JSONObject) feedArray.get(i);

            FeedItem item = new FeedItem();
            item.setId(feedObj.getInt("id"));
            item.setName(feedObj.getString("name"));

            // Image might be null sometimes
            String image = feedObj.isNull("image") ? null : feedObj
                    .getString("image");
            item.setImge(image);
            item.setStatus(feedObj.getString("status"));
            item.setProfilePic(feedObj.getString("profilePic"));
            item.setTimeStamp(feedObj.getString("timeStamp"));

            // url might be null sometimes
            String feedUrl = feedObj.isNull("url") ? null : feedObj
                    .getString("url");
            item.setUrl(feedUrl);

            feedItems.add(item);
        }

        // notify data changes to list adapater
        listAdapter.notifyDataSetChanged();
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

    }

XML for the drawer:

    <android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <!-- Framelayout to display Fragments -->

    <FrameLayout
        android:id="@+id/frame_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </FrameLayout>

    <!-- Listview to display slider menu -->

    <ListView
        android:id="@+id/list_slidermenu"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@color/list_background"
        android:choiceMode="singleChoice"
        android:divider="@color/list_divider"
        android:dividerHeight="1dp"
        android:listSelector="@drawable/list_selector" />
</android.support.v4.widget.DrawerLayout>

And Finally XML for the activity which I want to be called -

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ListView
    android:id="@+id/list"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:divider="@null" />

    </LinearLayout>
解决方案

The API for starting an Activity does not change when using a navigation drawer. You still only need to call startActivity() to launch a different Activity.

In this case, your code will look something like this:

private void displayView(int position) {
    // update the main content by replacing fragments
    Fragment fragment = null;
    switch (position) {
        case 0: // Or whatever nav item position should start the Activity
            startActivity(new Intent(this, HomePage.class));
            return;

        // The rest of your cases
}

Note that when after calling startActivity() for the homepage item, we return instead of break so that your displayView() doesn't try to replace the displayed Fragment.

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09-04 22:14