我的抽屉式导航栏不显示任何项目。我改变的背景为白色，主题已经改变，但仍然没有项目显示出来。我也使用抽屉和线性布局内的框架布局。没有错误或消息。我究竟做错了什么？
编辑：我过于简化我的工作，但仍然一无所获。没有项目..
EDIT2：删除多个后，我取得了一些进展，现在我看到的是，在预览，我drawer_menu显示像在右上角的选项菜单，即使在postLoginactivity.xml文件预览显示了我的目标是做。在模拟器仍然没有任何项目。
EDIT3：我已经削减了我的一半的代码，仍然不能看到我做了什么错。
activity_post_login.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
>
<!-- burdan sonra komple sıkıntı gibi?-->
<LinearLayout
android:id="@+id/llayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@color/colorPrimary"
android:elevation="4dp"
android:theme="@style/ThemeOverlay.AppCompat.Light" >
<TextView
android:id="@+id/textView"
android:layout_width="326dp"
android:layout_height="45dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:accessibilityLiveRegion="assertive"
android:paddingStart="100dp"
android:paddingEnd="100dp"
android:text="@string/deneme"
android:textSize="30sp"
android:visibility="visible"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.v7.widget.Toolbar>
<!-- android:layout_height=?attr/actionBarSize-->
<FrameLayout
android:id="@+id/mainFrameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toBottomOf="parent"
tools:layout_editor_absoluteX="0dp"/>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/nav_header"
>
<ExpandableListView
android:id="@+id/list_sliderMenu"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:paddingTop="176dp"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="1dp"
/>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
nav_header.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="176dp"
android:background="@color/colorPrimary"
android:gravity="bottom"
android:padding="16dp"
android:theme="@style/ThemeOverlay.AppCompat.Dark"
android:orientation="vertical"
>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher_round"/>
</LinearLayout>
drawer_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
>
<!--tools:showIn="navigation_view"-->
<group android:checkableBehavior="single"
android:id="@+id/menu_list">
<item android:title="@string/satisYonetimi"
android:id="@+id/satis_yonetimi"/>
<item
android:id="@+id/insanKaynaklari"
android:title="@string/insanKaynaklari" />
<item
android:id="@+id/muhasebeYonetimi"
android:title="@string/muhasebeYonetimi" />
<item
android:id="@+id/aktiviteYonetimi"
android:title="@string/aktiviteYonetimi" />
<item
android:id="@+id/destekYonetimi"
android:title="@string/destekYonetimi" />
</group>
</menu>
styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar" parent="@style/AppTheme" >
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
</resources>
v21\styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar" parent="@style/AppTheme" >
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
</resources>
另外，如果有人认为问题可能出在别的地方这里有category.java（扩展列表），subcategory.java（未来的子菜单将被实施），以及需显示我的抽屉里活动（下实现）
category.java
public class Category {
private String cat_name;
private int cat_code;
public void setCat_name(String cat_name) {
this.cat_name = cat_name;
}
public String getCatName(){
return cat_name;
}
public void setCat_code(int cat_code) {
this.cat_code = cat_code;
}
public int getCat_code() {
return cat_code;
}
}
subcategory.java
public class SubCategory {
private String subcat_name;
private String subcat_code;
public void setSubCatName(String subcat_name) {
this.subcat_name = subcat_name;
}
public String getSubCatName(){
return subcat_name;
}
public void setSubCatCode(String subcat_code) {
this.subcat_code = subcat_code;
}
public String getSubCatCode() {
return subcat_code;
}
}
postLogingActicity.java
import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ExpandableListView;
import java.util.ArrayList;
public class PostLoginActivity extends AppCompatActivity {
ActionBar bar;
ViewPager viewPager;
FragmentPagerAdapter fpAdapter;
Fragment mMainScreen;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private ExpandableListView mCategoryList;
private ArrayList<Category> category_name = new ArrayList<Category>();
private ArrayList <ArrayList<Category>> subcategory_name = new ArrayList
<ArrayList<Category>>();
private ArrayList<Integer> subCatCount = new ArrayList<Integer>();
int previousGroup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post_login);
//Toolbar toolbar =findViewById(R.id.toolbar);
//setSupportActionBar(toolbar);
//mDrawerLayout = findViewById(R.id.drawer_layout);
//ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this,
//mDrawerLayout, toolbar,
// R.string.navigation_drawer_open,
//R.string.navigation_drawer_close);
//mDrawerLayout.addDrawerListener(toggle);
//toggle.syncState();
//this.getCatData();
//Utils.deleteStringFromSp(this, "email");
}
public void onBackPressed(){
if(mDrawerLayout.isDrawerOpen(GravityCompat.START))
mDrawerLayout.closeDrawer(GravityCompat.START);
else
super.onBackPressed();
}
}
您的主要活动必须符合下列要求
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="rtl"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<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>
和activity_main_drawer
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">
<group android:checkableBehavior="single">
<item
android:id="@+id/nav_menu7"
android:icon="@drawable/ic_school_black_24dp"
android:title="XXXX" />
<item
android:id="@+id/nav_menu11"
android:icon="@drawable/ic_thumb_up_black_24dp"
android:title="XXXX" />
<item
android:id="@+id/nav_menu12"
android:icon="@drawable/ic_insert_drive_file_black_24dp"
android:title="XXXX" />
<item
android:id="@+id/nav_menu6"
android:icon="@drawable/ic_developer_mode_black_24dp"
android:title="XXXX" />
</group>
</menu>
在科特林导航菜单
// Navigate Menu
override fun onNavigationItemSelected(item: MenuItem): Boolean {
// Handle navigation view item clicks here.
when (item.itemId) {
R.id.nav_menu7 -> {
val intent = Intent(this, Computer::class.java)
startActivity(intent)
}
R.id.nav_menu6 -> {
val menu6 = Menu6()
val fragmentManager = supportFragmentManager
fragmentManager.beginTransaction().replace(R.id.fragment, menu6).addToBackStack(null).commit()
}
R.id.nav_menu12 -> {
val intent = Intent(Intent.ACTION_VIEW, Uri.parse("https://XXXXX"))
startActivity(intent)
}
}
drawer_layout.closeDrawer(GravityCompat.START)
return true
}
我希望这个解决您的问题菜单可与活动，片段网址
你已经错过引用导航视图菜单
当你把它命名为“drawer_menu_xml”，然后修改为：
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/nav_header"
app:menu="@menu/drawer_menu"/>