我在Android應用程序中添加了滑動菜單。但無法打開後點擊側面菜單

Question

我已經在android應用程序中添加滑動菜單。但點擊側面菜單後無法打開。點擊側面菜單後，它不是打開列表。當我調試時，我發現適配器= NULL & mdrawertoggle = NULL。

我添加的代碼請提供我的解決方案，如果任何人有。 謝謝。 Attached image is showing side menu but unable to get list after clicking。 MainActivity

public class MainActivity extends Activity { 

    private DrawerLayout mDrawerLayout; 
    private ListView mDrawerList; 
    private ActionBarDrawerToggle mDrawerToggle; 

    // 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 adater ; 


    // Log tag 
    private static final String TAG = MainActivity.class.getSimpleName(); 
    // data of json url 
    private static final String url = "http://milagro.in/wip/apps/n/THDC2.json"; 
    private ProgressDialog pDialog; 
    private List<Movie> movieList = new ArrayList<Movie>(); 
    private ListView listView; 
    private CustomListAdapter adapter; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     //mDrawerList.setOnItemClickListener(new SlideMenuClickListener()); 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     ActionBar actionBar = getActionBar(); 

     // Enabling Up/Back navigation 
     //actionBar.setDisplayHomeAsUpEnabled(true); 
     listView = (ListView) findViewById(R.id.list); 
     adapter = new CustomListAdapter(this, movieList); 
     listView.setAdapter(adapter); 
     pDialog = new ProgressDialog(this); 
     // Showing progress dialog before making http request 
     pDialog.setMessage("Loading..."); 
     pDialog.show(); 
     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.drawerLayout); 
     mDrawerList = (ListView) findViewById(R.id.list_slidermenu); 

     navDrawerItems = new ArrayList<NavDrawerItem>(); 

     // adding nav drawer items to array 
     // Profile 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1))); 
     // About 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1))); 
     // Emi Calculator 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1))); 
     // Currency Converter 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1))); 
     // PayInstallments/EMI 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1))); 
     // Social Feed 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1))); 
     // Feedback 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[6], navMenuIcons.getResourceId(6, -1))); 
     //Settings 
     navDrawerItems.add(new NavDrawerItem(navMenuTitles[7], navMenuIcons.getResourceId(7, -1))); 

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

     mDrawerList.setOnItemClickListener(new SlideMenuClickListener()); 

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

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

     mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,R.drawable.menu, //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); 
     } 
     // Creating volley request obj 
     JsonArrayRequest movieReq = new JsonArrayRequest(url, 
       new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray response) { 
         Log.d(TAG, response.toString()); 
         hidePDialog(); 
         // Parsing json 
         for (int i = 0; i < response.length(); i++) { 
          try { 
           JSONObject obj = response.getJSONObject(i); 
           Movie movie = new Movie(); 
           movie.setTitle(obj.getString("tata_project_name")); 
           movie.setThumbnailUrl(obj.getString("project_logo_url")); 
           movie.setParkingUrl(obj.getString("parking")); 
           movie.setPowerbackupUrl(obj.getString("powerbackup")); 
           movie.setFitnessUrl(obj.getString("fitness")); 
           movie.setLiftUrl(obj.getString("lift")); 
           movie.setParkUrl(obj.getString("park")); 
           movie.setSecurityUrl(obj.getString("security")); 
           movie.setSwimmingUrl(obj.getString("swimming")); 
           movie.setTypology(obj.getString("project_Typology")); 
           movie.setPrice(obj.getString("price")); 
           // adding movie to movies array 
           movieList.add(movie); 
          } catch (JSONException e) { 
           e.printStackTrace(); 
          } 
         } 
         // notifying list adapter about data changes 
         // so that it renders the list view with updated data 
         adapter.notifyDataSetChanged(); 
        } 
       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       VolleyLog.d(TAG, "Error: " + error.getMessage()); 
       hidePDialog(); 
      } 
     }); 
     // Adding request to request queue 
     AppController.getInstance().addToRequestQueue(movieReq); 

    } 

    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); 
    } 




    private void displayView(int position) { 
     // update the main content by replacing fragments 
     Fragment fragment = null; 
     switch (position) { 
      case 0: 
       fragment = new Profile(); 
       break; 
      case 1: 
       fragment = new About(); 
       break; 
      case 2: 
       fragment = new EMICalculator(); 
       break; 
      case 3: 
       fragment = new CurrencyConverter(); 
       break; 
      case 4: 
       fragment = new PayInstallment(); 
       break; 
      case 5: 
       fragment = new SocialFeed(); 
       break; 
      case 6 : 
       fragment =new Feedback(); 
       break; 
      case 7: 
       fragment =new Settings(); 
      break; 
      default: 
       break; 
     } 

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

    @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); 
    } 


    public void bottomMenuClick(View v) 
    { 
     int pos = Integer.parseInt(v.getTag().toString()); 

     switch (pos) 
     { 
      case 1: // enquiry screen 
       startActivity(new Intent(MainActivity.this,Enquiry.class)); 
       break; 
      case 2: // contact screen 
       startActivity(new Intent(MainActivity.this, Contact.class)); 
       break; 
      case 3: // Instant Call Back screen 
       startActivity(new Intent(MainActivity.this, CallBack.class)); 
       break; 
     } 
    } 
    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     hidePDialog(); 
    } 

    private void hidePDialog() { 
     if (pDialog != null) { 
      pDialog.dismiss(); 
      pDialog = null; 
     } 
    } 


} 

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
      xmlns:tools="http://schemas.android.com/tools" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      tools:context=".MainActivity" 
      android:id="@+id/app_name" 
      > 


      <android.support.v4.widget.DrawerLayout 
       android:id="@+id/drawerLayout" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 

       > 


      <FrameLayout 
       android:id="@+id/container_frame" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:orientation="vertical"/> 

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

      </android.support.v4.widget.DrawerLayout> 
       <ListView 
        android:id="@+id/list" 
        android:layout_width="wrap_content" 
        android:layout_height="match_parent" 
        android:divider="@color/list_divider" 
        android:dividerHeight="1dp" 
        android:listSelector="@drawable/list_row_selector" 
        android:background="@color/list_background"/> 

       <!-- <LinearLayout 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:orientation="vertical" 
        android:layout_below="@+id/content_frame" 
         >--> 
     <!-- <LinearLayout 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent"> 

      <LinearLayout 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1"></LinearLayout> 

      <LinearLayout 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1"></LinearLayout> 

      <LinearLayout 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:layout_weight="1"></LinearLayout> 

      <LinearLayout 
       android:orientation="vertical" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 

       android:layout_weight="1"> 

        <Button 
         android:id="@+id/MyButton" 

         android:layout_width="370dp" 
         android:layout_height="30dp" 
         android:layout_marginLeft="20dp" 
         android:layout_marginRight="20dp" 
         android:background="#01458e" 
         android:textColor="#FFFFFF" 
         android:text="@string/button_text"></Button> 


      </LinearLayout> 
      </LinearLayout>--> 
       <!-- </LinearLayout>--> 


     <!-- 
      <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"> 

       &lt;!&ndash; Framelayout to display Fragments &ndash;&gt; 
       <FrameLayout 
        android:id="@+id/frame_container" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" /> 

       &lt;!&ndash; Listview to display slider menu &ndash;&gt; 
       <ListView 
        android:id="@+id/list_slidermenu" 
        android:layout_width="240dp" 
        android:layout_height="match_parent" 
        android:layout_gravity="start" 
        android:choiceMode="singleChoice" 
        android:divider="@color/list_divider" 
        android:dividerHeight="1dp" 
        android:listSelector="@drawable/list_selector" 
        android:background="@color/list_background"/> 
      </android.support.v4.widget.DrawerLayout>--> 
     <!--<RelativeLayout 
       android:id="@+id/topLay" 
       android:layout_width="match_parent" 
       android:layout_height="@dimen/topLayHt" 
       android:layout_alignParentTop="true" 
       android:background="@drawable/header_bg"> 
      &lt;!&ndash;<ImageView 
       android:id="@+id/settingBtn" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/setting_btn_highlight" 
       android:layout_alignParentRight="true" 
       android:layout_centerVertical="true" 
       android:layout_marginRight="@dimen/setting_btn_mg_rt" 
       android:clickable="true" 
       android:onClick="settingClick" 
       android:visibility="visible"/> 

       <ImageView 
        android:id="@+id/menu_btn" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:src="@drawable/menu_btn_highlight" 
        android:layout_marginLeft="@dimen/menu_btn_mg_lft" 

        android:clickable="true" 
        android:onClick="menuClick"/> 
      <ImageView 
       android:id="@+id/homeBtn" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/home_btn_highlight" 
       android:layout_alignParentRight="true" 
       android:layout_centerVertical="true" 
       android:layout_marginRight="@dimen/home_btn_mg_rt" 
       android:clickable="true" 
       android:onClick="homeClick" 
       android:visibility="gone"/> 

      <ImageView 
       android:id="@+id/backBtn" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/back_btn_highlight" 
       android:layout_centerVertical="true" 
       android:layout_marginLeft="@dimen/back_btn_mg_lft" 
       android:clickable="true" 
       android:onClick="backClick" 
       android:visibility="gone"/>&ndash;&gt; 
     </RelativeLayout>--> 

      <include 
       android:id="@+id/menu_lay" 
       layout="@layout/bottom_layout" /> 

     </RelativeLayout> 

NavdrawerlistAdapter.java

public class NavDrawerListAdapter extends BaseAdapter { 

    private Context context; 
    private ArrayList<NavDrawerItem> navDrawerItems; 

    public NavDrawerListAdapter(Context context, ArrayList<NavDrawerItem> navDrawerItems){ 
     this.context = context; 
     this.navDrawerItems = navDrawerItems; 
    } 

    @Override 
    public int getCount() { 
     return navDrawerItems.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return navDrawerItems.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     if (convertView == null) { 
      LayoutInflater mInflater = (LayoutInflater) 
        context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 
      convertView = mInflater.inflate(R.layout.drawer_list_item, null); 
     } 

     ImageView imgIcon = (ImageView) convertView.findViewById(R.id.icon); 
     TextView txtTitle = (TextView) convertView.findViewById(R.id.title); 
     TextView txtCount = (TextView) convertView.findViewById(R.id.counter); 

     imgIcon.setImageResource(navDrawerItems.get(position).getIcon());   
     txtTitle.setText(navDrawerItems.get(position).getTitle()); 

     // displaying count 
     // check whether it set visible or not 
     if(navDrawerItems.get(position).getCounterVisibility()){ 
      txtCount.setText(navDrawerItems.get(position).getCount()); 
     }else{ 
      // hide the counter view 
      txtCount.setVisibility(View.GONE); 
     } 

     return convertView; 
    } 

} 

drawerlist_item.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="48dp" 
    android:background="@drawable/list_selector"> 

    <ImageView 
     android:id="@+id/icon" 
     android:layout_width="25dp" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_marginLeft="12dp" 
     android:layout_marginRight="12dp" 
     android:contentDescription="@string/desc_list_item_icon" 
     android:src="@drawable/ic_home" 
     android:layout_centerVertical="true" /> 

    <TextView 
     android:id="@+id/title" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_toRightOf="@id/icon" 
     android:minHeight="?android:attr/listPreferredItemHeightSmall" 
     android:textAppearance="?android:attr/textAppearanceListItemSmall" 
     android:textColor="@color/list_item_title" 
     android:gravity="center_vertical" 
     android:paddingRight="40dp"/> 

    <TextView android:id="@+id/counter" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:background="@drawable/counter_bg" 
     android:layout_alignParentRight="true" 
     android:layout_centerVertical="true" 
     android:layout_marginRight="8dp" 
     android:textColor="@color/counter_text_color"/> 

</RelativeLayout> 

Navdraweritem.java

public class NavDrawerItem { 

    private String title; 
    private int icon; 
    private String count = "0"; 
    // boolean to set visiblity of the counter 
    private boolean isCounterVisible = false; 

    public NavDrawerItem(){} 

    public NavDrawerItem(String title, int icon){ 
     this.title = title; 
     this.icon = icon; 
    } 

    public NavDrawerItem(String title, int icon, boolean isCounterVisible, String count){ 
     this.title = title; 
     this.icon = icon; 
     this.isCounterVisible = isCounterVisible; 
     this.count = count; 
    } 

    public String getTitle(){ 
     return this.title; 
    } 

    public int getIcon(){ 
     return this.icon; 
    } 

    public String getCount(){ 
     return this.count; 
    } 

    public boolean getCounterVisibility(){ 
     return this.isCounterVisible; 
    } 

    public void setTitle(String title){ 
     this.title = title; 
    } 

    public void setIcon(int icon){ 
     this.icon = icon; 
    } 

    public void setCount(String count){ 
     this.count = count; 
    } 

    public void setCounterVisibility(boolean isCounterVisible){ 
     this.isCounterVisible = isCounterVisible; 
    } 
} 

Answer 1

首先你必須把你的整體視圖drawerlayout內像這樣

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v4.widget.DrawerLayout 
android:id="@+id/drawer_layout" 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:layout_gravity="center_horizontal" 
android:gravity="center_horizontal" 
android:orientation="vertical"> 

<include 
    layout="@layout/activity_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"/> 

<android.support.design.widget.NavigationView 
    android:id="@+id/nav_view" 
    android:layout_width="wrap_content" 
    android:layout_height="match_parent" 
    android:layout_gravity="start" 
    android:fitsSystemWindows="true" 
    app:menu="@menu/activity_main_drawer"/> 
</android.support.v4.widget.DrawerLayout> 

這裏活動佈局是主要佈局與所有的美景

Answer 2

activity_main.xml中應該是這樣的：

 <android.support.v4.widget.DrawerLayout 
      android:id="@+id/drawerLayout" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 

      xmlns:android="http://schemas.android.com/apk/res/android"> 


      <FrameLayout 
       android:id="@+id/container_frame" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:orientation="vertical"/> 

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


       <ListView 
        android:id="@+id/list" 
        android:layout_width="wrap_content" 
        android:layout_height="match_parent" 
        android:divider="@color/list_divider" 
        android:dividerHeight="1dp" 
        android:listSelector="@drawable/list_row_selector" 
        android:background="@color/list_background"/> 
    </android.support.v4.widget.DrawerLayout>