Question

在我的home.java中---> loadMenu（）---> onBindViewHolder ---> onClick 将进入Foodlist.java，但出现白屏，它将进入回到应用程序的开始...看起来好像没什么问题我的代码..我检查我的数据库...所有引用设置正确...

请帮助它花费太多时间，但我无法解决此问题

Logcat错误：-

2019-03-07 01:59:06.851 1818-1902/? E/AudioFlinger: not enough memory for AudioTrack size=131296
2019-03-07 01:59:06.851 1818-1902/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
2019-03-07 01:59:06.852 2698-10162/com.google.android.googlequicksearchbox:search E/IAudioFlinger: createRecord returned error -12
2019-03-07 01:59:06.852 2698-10162/com.google.android.googlequicksearchbox:search E/AudioRecord: AudioFlinger could not create record track, status: -12
2019-03-07 01:59:06.853 2698-10162/com.google.android.googlequicksearchbox:search E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
2019-03-07 01:59:06.854 2698-10162/com.google.android.googlequicksearchbox:search E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.

2019-03-07 02:06:30.094 2698-10162/com.google.android.googlequicksearchbox:search E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
2019-03-07 02:06:30.592 2698-10162/com.google.android.googlequicksearchbox:search E/ActivityThread: Failed to find provider info for com.google.android.apps.gsa.testing.ui.audio.recorded
2019-03-07 02:06:32.136 1923-1929/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-03-07 02:06:32.470 1923-2490/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-03-07 02:06:34.786 2773-10408/com.google.android.gms.persistent E/NetworkScheduler: Invalid component specified.
2019-03-07 02:06:44.633 2118-2138/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:06:56.052 1837-1837/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2019-03-07 02:06:59.290 2118-2138/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:07:08.808 2118-2795/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:07:24.257 1765-1805/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
2019-03-07 02:07:56.100 1837-1837/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2019-03-07 02:08:00.009 2118-2138/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:08:04.433 2698-11141/com.google.android.googlequicksearchbox:search E/EntrySyncManager: Cannot determine account name: drop request
2019-03-07 02:08:04.435 2698-11141/com.google.android.googlequicksearchbox:search E/NowController: Failed to access data from EntryProvider. ExecutionException.
    java.util.concurrent.ExecutionException: com.google.android.apps.gsa.sidekick.main.h.n: Could not complete scheduled request to refresh entries. ClientErrorCode: 3
        at com.google.common.util.concurrent.d.eA(SourceFile:85)
 Process: com.example.eatit, PID: 11146
    com.google.firebase.database.DatabaseException: Found two getters or fields with conflicting case sensitivity for property: description
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.addProperty(com.google.firebase:firebase-database@@16.1.0:545)
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper$BeanMapper.<init>(com.google.firebase:firebase-database@@16.1.0:476)
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.loadOrCreateBeanMapperForClass(com.google.firebase:firebase-database@@16.1.0:317)
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(com.google.firebase:firebase-database@@16.1.0:418)
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(com.google.firebase:firebase-database@@16.1.0:214)
        at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(com.google.firebase:firebase-database@@16.1.0:79)
        at com.google.firebase.database.DataSnapshot.getValue(com.google.firebase:firebase-database@@16.1.0:212)
        at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:29)
        at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:15)
        at com.firebase.ui.common.BaseCachingSnapshotParser.parseSnapshot(BaseCachingSnapshotParser.java:35)
        at com.firebase.ui.common.BaseObservableSnapshotArray.get(BaseObservableSnapshotArray.java:52)
        at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:106)
        at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:122)
        at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6781)
        at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6823)
        at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5752)
        at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6019)
        at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
        at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
        at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
        at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
        at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
        at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3641)
        at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1888)
        at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:407)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
        at android.view.Choreographer.doCallbacks(Choreographer.java:761)
        at android.view.Choreographer.doFrame(Choreographer.java:693)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-03-07 02:09:10.175 2118-2220/system_process E/InputDispatcher: channel '74f4010 com.example.eatit/com.example.eatit.FoodList (server)' ~ Channel is unrecoverably broken and will be disposed!
2019-03-07 02:09:10.179 2118-2220/system_process E/InputDispatcher: channel 'ab330dc com.example.eatit/com.example.eatit.home (server)' ~ Channel is unrecoverably broken and will be disposed!
2019-03-07 02:09:10.179 2118-2220/system_process E/InputDispatcher: channel 'a639adf com.example.eatit/com.example.eatit.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
2019-03-07 02:09:11.542 1923-1929/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-03-07 02:09:11.759 1923-2490/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2019-03-07 02:09:13.191 2773-10841/com.google.android.gms.persistent E/NetworkScheduler: Invalid component specified.
2019-03-07 02:09:23.230 2118-2138/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:
2019-03-07 02:09:24.260 1765-1805/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
2019-03-07 02:09:56.160 1837-1837/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2019-03-07 02:10:00.030 2118-2138/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:10:09.273 2118-2797/system_process E/memtrack: Couldn't load memtrack module
2019-03-07 02:10:24.261 1765-1805/? E/storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
2019-03-07 02:10:44.248 2773-2773/com.google.android.gms.persistent E/BluetoothAdapter: Bluetooth binder is null
2019-03-07 02:10:44.279 2773-2773/com.google.android.gms.persistent E/BluetoothAdapter: Bluetooth binder is null
2019-03-07 02:10:44.570 11252-11275/com.google.android.apps.messaging E/.apps.messagin: The String#value field is not present on Android versions >= 6.0
2019-03-07 02:10:44.714 11239-11239/com.google.android.gms.ui E/.android.gms.u: The String#value field is not present on Android versions >= 6.0
2019-03-07 02:10:44.847 11252-11275/com.google.android.apps.messaging E/Bugle: P2pConversationSuggestionsUtil: Problem linking Smart Reply JNIs.
2019-03-07 02:10:44.848 11252-11275/com.google.android.apps.messaging E/Bugle: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/system/app/PrebuiltBugle/PrebuiltBugle.apk"],nativeLibraryDirectories=[/system/app/PrebuiltBugle/lib/x86, /system/app/PrebuiltBugle/PrebuiltBugle.apk!/lib/x86, /system/lib, /system/lib]]] couldn't find "libhobbes_jni.so"
        at java.lang.Runtime.loadLibrary0(Runtime.java:1012)
        at java.lang.System.loadLibrary(System.java:1669)
        at dgm.<clinit>(SourceFile:609)
        at cuo.a(SourceFile:7)
        at llj.a(SourceFile:10)
        at bso.am(SourceFile:502)
        at buh.o(SourceFile:46)
        at bui.run(Unknown Source:2)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:764)
2019-03-07 02:10:44.923 11252-11252/com.google.android.apps.messaging E/FirebaseInstanceId: Failed to start service while in background: java.lang.IllegalStateException: Not allowed to start service Intent { act=com.google.firebase.INSTANCE_ID_EVENT pkg=com.google.android.apps.messaging cmp=com.google.android.apps.messaging/.fcm.BugleFirebaseInstanceIDService (has extras) }: app is in background uid UidRecord{df14836 u0a44 RCVR idle change:uncached procs:1 seq(0,0,0)}
2019-03-07 02:10:45.493 11306-11324/com.google.android.apps.messaging:rcs E/s.messaging:rc: The String#value field is not present on Android versions >= 6.0
2019-03-07 02:10:45.667 2773-10190/com.google.android.gms.persistent E/NetworkScheduler: Invalid component specified.
2019-03-07 02:10:56.171 1837-1837/? E/netmgr: Failed to open QEMU pipe 'qemud:network': Invalid argument
2019-03-07 02:11:00.016 2118-2138/system_process E/memtrack: Couldn't load memtrack module

home.java

public class home extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
    FirebaseDatabase database;
    DatabaseReference category;
    TextView txtFullName;
    RecyclerView recycler_menu;
    RecyclerView.LayoutManager layoutManager;
    FirebaseRecyclerAdapter<Category,MenuViewHolder>  adapter;
    FirebaseRecyclerOptions<Category> options;

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


        Toolbar toolbar =  findViewById(R.id.toolbar);
        toolbar.setTitle("Menu");
        setSupportActionBar(toolbar);

        //ini Firebase
        database=FirebaseDatabase.getInstance();
        category=database.getReference("Category");
        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer =  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();

        NavigationView navigationView =  findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

        //set name for users
        View headerView=navigationView.getHeaderView(0);
        txtFullName=headerView.findViewById(R.id.txtFullName);
        txtFullName.setText(Common.currentUser.getName());

        //load menu
        recycler_menu=findViewById(R.id.recycler_menu);
        recycler_menu.setHasFixedSize(true);
        layoutManager=new LinearLayoutManager(this);
        recycler_menu.setLayoutManager(layoutManager);

        loadMenu();
    }

    private void loadMenu() {
       options = new FirebaseRecyclerOptions.Builder<Category>()
                        .setQuery(category, Category.class)
                        .build();

        adapter = new FirebaseRecyclerAdapter<Category, MenuViewHolder>(options) {
            @Override
            public MenuViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.menu_item, parent, false);
                return new MenuViewHolder(view);
            }
        @Override
        protected void onBindViewHolder(@NonNull MenuViewHolder viewHolder, int position, @NonNull Category model) {
            viewHolder.txtMenuName.setText(model.getName());
            Picasso.with(getBaseContext()).load(model.getImage()).into(viewHolder.imageView);
            final Category clickItem = model;
            viewHolder.setItemClickListener(new ItemClickListener() {
                @Override
                public void onClick(View view, int position, boolean isLongClick) {
                    //Get CategoryId and send to new Activity
                    Intent foodList=new Intent(home.this,FoodList.class);
                    //because CategoryId is key, so we just get key of the item
                    foodList.putExtra("CategoryId",adapter.getRef(position).getKey());
                   // ContextCompat.startForegroundService(home.this,foodList);
                   startActivity(foodList);
                }
            });
        }
    };
        recycler_menu.setAdapter(adapter);
}

    @Override
    public void onStart() {
        super.onStart();
        adapter.startListening();
    }

    @Override
    public void onStop() {
        super.onStop();
        adapter.stopListening();
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer =  findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.home, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_menu) {
            // Handle the camera action
        } else if (id == R.id.nav_cart) {

        } else if (id == R.id.nav_order) {

        } else if (id == R.id.nav_logout) {

        }

        DrawerLayout drawer =  findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

FooList.java

意图进入FooList.java

package com.example.eatit;

import android.nfc.Tag;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;

import android.view.ViewGroup;
import android.widget.Toast;
import com.example.eatit.Interface.ItemClickListener;
import com.example.eatit.Model.Food;
import com.example.eatit.ViewHolder.FoodViewHolder;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.squareup.picasso.Picasso;

public class FoodList extends AppCompatActivity {

    RecyclerView recyclerView;
    RecyclerView.LayoutManager layoutManager;
    FirebaseDatabase database;
    DatabaseReference foodList;
    String categoryId = "";
    //or maybe
    //String categoryId=" ";
    FirebaseRecyclerAdapter<Food, FoodViewHolder> adapter;
    FirebaseRecyclerOptions<Food> options;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_food_list);
        //Firebase
        database = FirebaseDatabase.getInstance();
        foodList = database.getReference("Food");
        recyclerView = findViewById(R.id.recycler_food);
        recyclerView.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        //Get Intent her

        if (getIntent() != null)
            categoryId = getIntent().getStringExtra("CategoryId");

        if (!categoryId.isEmpty() && categoryId != null) {
            loadListFood(categoryId);
        }
    }

    private void loadListFood(String categoryId) {

//        Query query1 = FirebaseDatabase.getInstance().getReference("Food")
//                .orderByChild("MenuId").equalTo(categoryId);

        Query query1 = foodList.orderByChild("MenuId").equalTo(categoryId);
        options = new FirebaseRecyclerOptions.Builder<Food>()
                        .setQuery(query1, Food.class)
                        .build();

        adapter = new FirebaseRecyclerAdapter<Food, FoodViewHolder>(options) {
            @Override
            public FoodViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.food_item, parent, false);

                return new FoodViewHolder(view);
            }


            @Override
            protected void onBindViewHolder(@NonNull FoodViewHolder holder, int position, @NonNull Food model) {
                holder.food_name.setText(model.getName());
                Picasso.with(getBaseContext()).load(model.getImage()).into(holder.food_image);
                final Food clickItem = model;
                holder.setItemClickListener(new ItemClickListener() {
                    @Override
                    public void onClick(View view, int position, boolean isLongClick) {
                        Toast.makeText(FoodList.this, "" + clickItem.getName(), Toast.LENGTH_LONG).show();
                    }
                });
            }
        };

        Log.d("TAG", "" + adapter.getItemCount());
        recyclerView.setAdapter(adapter);
    }
    // Also override the following methods.

    @Override
    public void onStart() {
        super.onStart();
        adapter.startListening();
    }

    @Override
    public void onStop() {
        super.onStop();
        adapter.stopListening();

    }
}

Food.java

package com.example.eatit.Model;

public class Food {

    public String Name,Image,Description,Price,Discount,MenuId;

    public Food() {
    }

    public Food(String name, String image, String description, String price, String discount, String menuId) {
        Name = name;
        Image = image;
        Description = description;
        Price = price;
        Discount = discount;
        MenuId = menuId;
    }

    public String getName() {
        return Name;
    }

    public void setName(String name) {
        Name = name;
    }

    public String getImage() {
        return Image;
    }

    public void setImage(String image) {
        Image = image;
    }

    public String getDescription() {
        return Description;
    }

    public void setDescription(String description) {
        Description = description;
    }

    public String getPrice() {
        return Price;
    }

    public void setPrice(String price) {
        Price = price;
    }

    public String getDiscount() {
        return Discount;
    }

    public void setDiscount(String discount) {
        Discount = discount;
    }

    public String getMenuId() {
        return MenuId;
    }

    public void setMenuId(String menuId) {
        MenuId = menuId;
    }
}

ItemClickListener.java

其界面

package com.example.eatit.Interface;

import android.view.View;

public interface ItemClickListener {
    void onClick(View view,int position,boolean isLongClick);
}

FoodViewHolder.java

package com.example.eatit.ViewHolder;

import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.eatit.Interface.ItemClickListener;
import com.example.eatit.R;


public class FoodViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    public TextView food_name;
    public ImageView food_image;

    private ItemClickListener itemClickListener;

    public void setItemClickListener(ItemClickListener itemClickListener) {
        this.itemClickListener = itemClickListener;
    }

    public FoodViewHolder(@NonNull View itemView) {
        super(itemView);
        food_name=itemView.findViewById(R.id.food_name);
        food_image=itemView.findViewById(R.id.food_image);
    }


    @Override
    public void onClick(View view) {
        itemClickListener.onClick(view,getAdapterPosition(),false);
    }
}

从Firebase在recyclerview中打开菜单时，出现白屏..

0 个答案: