我有一段时间这个问题了，看来我无法解决
HomeFragment.java
public class HomeFragment extends Fragment {
/*- 01 Class Variables -------------------------------------------------------------- */
private View mainView;
private Cursor listCursor;
// Action buttons on toolbar
private MenuItem menuItemAddFood;
// Holding variables
private String currentDateYear = "";
private String currentDateMonth = "";
private String currentDateDay = "";
private String currentFoodId;
private String currentFoodName;
private String currentFdId;
private boolean lockPortionSizeByPcs;
private boolean lockPortionSizeByGram;
/*- 02 Fragment Variables ----------------------------------------------------------- */
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
/*- 03 Constructur ------------------------------------------------------------------ */
public HomeFragment() {
// Required empty public constructor
}
/*- 04 Creating Fragment ------------------------------------------------------------- */
// TODO: Rename and change types and number of parameters
public static HomeFragment newInstance(String param1, String param2) {
HomeFragment fragment = new HomeFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
//OnCREATEEEEEE
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
//---------Set Title----------
((MainActivity)getActivity()).getSupportActionBar().setTitle("Home");
}
/*- 05 on Activity Created ---------------------------------------------------------- */
// Run methods when started
// Set toolbar menu items
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
/* Set title */
((MainActivity)getActivity()).getSupportActionBar().setTitle("Home");
// getDataFromDbAndDisplay
initializeHome();
// Create menu
setHasOptionsMenu(true);
} // onActivityCreated
/*- 06 On create view ---------------------------------------------------------------- */
// Sets main View variable to the view, so we can change views in fragment
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mainView = inflater.inflate(R.layout.fragment_home, container, false);
return mainView;
}
/*- 07 set main view ----------------------------------------------------------------- */
// Changing view method in fragmetn
private void setMainView(int id){
LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mainView = inflater.inflate(id, null);
ViewGroup rootView = (ViewGroup) getView();
rootView.removeAllViews();
rootView.addView(mainView);
}
/*- 08 on Create Options Menu -------------------------------------------------------- */
// Creating action icon on toolbar
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// Inflate menu
MenuInflater menuInflater = ((MainActivity)getActivity()).getMenuInflater();
inflater.inflate(R.menu.menu_home, menu);
// ((MainActivity)getActivity()).getMenuInflater().inflate(R.menu.menu_home, menu);
// Assign menu items to variables
menuItemAddFood = menu.findItem(R.id.menu_action_add_food);
}
/*- 09 on Options Item Selected ------------------------------------------------------ */
// Action icon clicked on
// Menu
@Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
int id = menuItem.getItemId();
if (id == R.id.menu_action_add_food) {
AddFoodToDiarySelectedMealNumber();
}
return super.onOptionsItemSelected(menuItem);
}
MainActivty
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener,
AddFoodToDiaryFragment.OnFragmentInteractionListener,
CategoriesFragment.OnFragmentInteractionListener,
FoodFragment.OnFragmentInteractionListener,
GoalFragment.OnFragmentInteractionListener,
HomeFragment.OnFragmentInteractionListener,
ProfileFragment.OnFragmentInteractionListener{
private AppBarConfiguration mAppBarConfiguration;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/* Toolbar */
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
/* Inialize fragmet */
Fragment fragment = null;
Class fragmentClass = null;
fragmentClass = HomeFragment.class;
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
/* Navigation */
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
// Navigation items
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//stetho---
Stetho.initializeWithDefaults(this);
new OkHttpClient.Builder().addNetworkInterceptor(new StethoInterceptor()).build();
/* Database */
DBAdapter db = new DBAdapter(this);
db.open();
/* Setup for food */
// Count rows in food
int numberRows = db.count("food");
if(numberRows < 1){
// Run setup
Toast.makeText(this, "Loading setup...", Toast.LENGTH_LONG).show();
DBSetupInsert setupInsert = new DBSetupInsert(this);
setupInsert.insertAllCategories();
setupInsert.insertAllFood();
Toast.makeText(this, "Setup completed!", Toast.LENGTH_LONG).show();
}
//check if there users in user table
//count rows in user table
numberRows = db.count("users");
Intent intent;
if(numberRows <1 ){
//sign Up
Toast.makeText(this, " you only few steps away from Signing up ...!", Toast.LENGTH_LONG).show();
intent = new Intent(MainActivity.this, SignUp.class);
startActivity(intent);
}else{
intent = new Intent(MainActivity.this, EditProfileGoal.class);
startActivity(intent);
}
db.close();
}
home_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
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:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fitsSystemWindows="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="18dp"
android:layout_marginRight="18dp"
android:layout_marginBottom="18dp"
android:layout_marginLeft="18dp">
<TextView
android:id="@+id/text_home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<!-- Breakfast -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineBreakfast"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddBreakfast"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineBreakfast"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/break_fast"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergyBreakfast"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutBreakfastItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //Breakfast -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:id="@+id/textView"
android:background="#000"></TextView>
<!-- Lunch -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineLunch"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddLunch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineLunch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/lunch"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergyLunch"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutLunchItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //Lunch -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- Before training -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineBeforeTraining"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddBeforeTraining"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineBeforeTraining"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/before_training"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergyBeforeTraining"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutBeforeTrainingItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //BeforeT raining -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- After training -->
<TableLayout
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineAfterTraining"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddAfterTraining"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineAfterTraining"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/after_training"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergyAfterTraining"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutAfterTrainingItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //After Training -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- Dinner -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineDinner"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddDinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineDinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/dinnner"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergyDinner"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutDinnerItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //Dinner -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- Snacks -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineSnacks"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddSnacks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineSnacks"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginBottom="10dp"
android:text="@string/snacks"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergySnacks"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutSnacksItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //Snacks -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- Supper -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineSupper"
android:layout_width="fill_parent"
android:background="#A9A9A9 "
android:layout_height="wrap_content">
<ImageView
android:id="@+id/imageViewAddSupper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/ic_menu_add" />
<TextView
android:id="@+id/textViewHeadlineSupper"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="80"
android:layout_marginTop="10dp"
android:text="@string/supper"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewEnergySupper"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="10"
android:text="@string/energy"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<TableLayout
android:id="@+id/tableLayoutSupperItems"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TableLayout>
<!-- //Supper -->
<TextView
android:layout_width="match_parent"
android:layout_height="3dp"
android:background="#000"></TextView>
<!-- todays reuslt -->
<!-- total -->
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TableRow
android:id="@+id/tableRowHeadlineTotal"
android:layout_width="fill_parent"
android:background=" #D3D3D3 "
android:layout_height="wrap_content">
<TextView
android:id="@+id/textViewHeadlineGoalWithActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginTop="10dp"
android:text="@string/goal_with_activity"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewFood"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="@string/food_calories"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewSum"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="@string/remaining"
android:textSize="18sp" />
</TableRow>
<!---->
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/headcell"
>
<TextView
android:id="@+id/textViewBodyGoalWithActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginTop="10dp"
android:text="@string/goal_with_activity"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewBodyFood"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="@string/food_calories"
android:textSize="18sp" />
<TextView
android:id="@+id/textViewBodyRemain"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="@string/remaining"
android:textSize="18sp" />
</TableRow>
</TableLayout>
<!-- end todays reuslt -->
</LinearLayout>
</ScrollView>
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.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"
tools:openDrawer="start">
<include
layout="@layout/app_bar_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_fragment"
app:menu="@menu/activity_main_drawer" />
</androidx.drawerlayout.widget.DrawerLayout>
错误
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.appdiet33, PID: 6829
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.appdiet33/com.example.appdiet33.MainActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f09009d (com.example.appdiet33:id/flContent) for fragment HomeFragment{35b333b} (1260b40b-35da-49bd-9060-13848371c9d8) id=0x7f09009d}
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f09009d (com.example.appdiet33:id/flContent) for fragment HomeFragment{35b333b} (1260b40b-35da-49bd-9060-13848371c9d8) id=0x7f09009d}
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:305)
我曾尝试使用getChildFragmentManager（）而不是getSupportFragmentManager（），类似询问类似问题 在HomeFragment中 问了一个问题，但这对我不起作用
有什么建议吗？
编辑：
我解决了原来的问题，我app_bar_main.xml中的ID拼写错误并修复了