Question

我的问题与这个问题how to check favorite item document is exist from firestore类似，但就我而言，它是Java上的Firebase实时数据库。我添加了将收藏夹添加到Firebase数据库的功能，但问题仅在于替换工具栏上的收藏夹按钮。如下图所示的详细活动页面

当我单击列表recyclerview上的项目时，详细信息活动必须知道数据是否存储在“收藏夹”节点上。当我单击detailActivity工具栏上的“收藏夹”按钮时，数据已成功存储，但是当我再次打开存储在“收藏夹”中的项目时，尽管“收藏夹”按钮的颜色没有变化，即使它已存储在“收藏夹”节点上。

这是我尝试进行详细活动的代码。

DetailEducationActivity.java

/*
 * Copyright 2019 RONINGRUM. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package co.id.roningrum.dolanapptugasakhir.ui.detailactivity;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.content.ContextCompat;

import com.bumptech.glide.Glide;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.material.appbar.AppBarLayout;
import com.google.android.material.appbar.CollapsingToolbarLayout;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;

import java.util.Objects;

import co.id.roningrum.dolanapptugasakhir.R;
import co.id.roningrum.dolanapptugasakhir.handler.GPSHandler;
import co.id.roningrum.dolanapptugasakhir.handler.HaversineHandler;
import co.id.roningrum.dolanapptugasakhir.model.TourismItem;

public class DetailEducatioActivity extends AppCompatActivity implements OnMapReadyCallback {
    public static final String EXTRA_WISATA_KEY = "edukasi_key";
    private static final String MAP_VIEW_KEY = "mapViewBundle";

    private final static String TAG = "Pesan";
    private GoogleMap educationGoogleMap;
    private MapView educationMapView;

    private DatabaseReference educationDetailRef;

    private GPSHandler gpsHandler;
    private ValueEventListener valueEventListener;

    private TextView tvNameEducationDetail, tvAddressEducationDetail,
            tvDescEducation, tvDistanceEducation;

    private ImageView imgEducation;
    private CollapsingToolbarLayout collapsingToolbarLayout;

    private double startLat;
    private double startlng;
    private double endlat;
    private double endLng;
    private double distance;

    boolean isFavorite;
    TourismItem tourismItem = new TourismItem();
    String eduKey;
    private FirebaseAuth firebaseAuth;
    private FirebaseUser user;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail_education_category);
        tvNameEducationDetail = findViewById(R.id.name_place_education_detail);
        tvAddressEducationDetail = findViewById(R.id.address_place_education_detail);
        tvDescEducation = findViewById(R.id.info_place_education_detail);
        tvDistanceEducation = findViewById(R.id.distance_place_education_detail);
        imgEducation = findViewById(R.id.img_nature_education_detail);
        educationMapView = findViewById(R.id.loc_edu_map);
        collapsingToolbarLayout = findViewById(R.id.collapseToolbar);

        Toolbar toolbarEducation = findViewById(R.id.toolbar_education_detail);
        setSupportActionBar(toolbarEducation);
        Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_arrow_back_24dp);

        firebaseAuth = FirebaseAuth.getInstance();
        user = firebaseAuth.getCurrentUser();


        Bundle mapViewBundle = null;
        if (savedInstanceState != null) {
            mapViewBundle = savedInstanceState.getBundle(MAP_VIEW_KEY);
        }
        educationMapView.onCreate(mapViewBundle);
        educationMapView.getMapAsync(this);

        eduKey = getIntent().getStringExtra(EXTRA_WISATA_KEY);
        if (eduKey == null) {
            throw new IllegalArgumentException("Must pass Extra");
        }
        educationDetailRef = FirebaseDatabase.getInstance().getReference().child("Tourism").child(eduKey);
        Query eduQuery = educationDetailRef.orderByChild("category_tourism").equalTo("edukasi");
        gpsHandler = new GPSHandler(this);


        LoadEducationDetail();

    }

    private void LoadEducationDetail() {
        if (gpsHandler.isCanGetLocation()) {
            ValueEventListener eventListener = new ValueEventListener() {
                @SuppressLint("SetTextI18n")
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    tourismItem = dataSnapshot.getValue(TourismItem.class);
                    startLat = gpsHandler.getLatitude();
                    startlng = gpsHandler.getLongitude();
                    assert tourismItem != null;
                    endlat = tourismItem.getLat_location_tourism();
                    endLng = tourismItem.getLng_location_tourism();
                    distance = HaversineHandler.calculateDistance(startLat, startlng, endlat, endLng);

                    @SuppressLint("DefaultLocale") String distanceFormat = String.format("%.2f", distance);
                    tvDistanceEducation.setText("" + distanceFormat + " km");
                    tvNameEducationDetail.setText(tourismItem.getName_tourism());
                    tvAddressEducationDetail.setText(tourismItem.getLocation_tourism());
                    tvDescEducation.setText(tourismItem.getInfo_tourism());
                    Glide.with(getApplicationContext()).load(tourismItem.getUrl_photo()).into(imgEducation);
                    AppBarLayout appBarLayout = findViewById(R.id.app_bar);
                    appBarLayout.addOnOffsetChangedListener(new AppBarLayout.BaseOnOffsetChangedListener() {
                        boolean isShow = true;
                        int scrollRange = -1;

                        @Override
                        public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
                            if (scrollRange == -1) {
                                scrollRange = appBarLayout.getTotalScrollRange();
                            }
                            if (scrollRange + verticalOffset == 0) {
                                collapsingToolbarLayout.setTitle(tourismItem.getName_tourism());
                                isShow = true;
                            } else {
                                collapsingToolbarLayout.setTitle(" ");
                                isShow = false;
                            }

                        }
                    });

                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {
                    Log.e(TAG, "Firebase Database Error" + databaseError.getMessage());
                }
            };
            educationDetailRef.addValueEventListener(eventListener);
            valueEventListener = eventListener;
        }
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Bundle mapViewBundle = outState.getBundle(MAP_VIEW_KEY);
        if (mapViewBundle == null) {
            mapViewBundle = new Bundle();
            outState.putBundle(MAP_VIEW_KEY, mapViewBundle);
        }
        educationMapView.onSaveInstanceState(mapViewBundle);

    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        educationGoogleMap = googleMap;
        ValueEventListener eventListener = new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                tourismItem = dataSnapshot.getValue(TourismItem.class);
                assert tourismItem != null;
                double lattitude = tourismItem.getLat_location_tourism();
                double longitude = tourismItem.getLng_location_tourism();

                LatLng location = new LatLng(lattitude, longitude);
                educationGoogleMap.addMarker(new MarkerOptions().position(location));
                educationGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(location, 16.0f));
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                Log.e(TAG, "Firebase Database Error" + databaseError.getMessage());
            }
        };
        educationDetailRef.addValueEventListener(eventListener);
        valueEventListener = eventListener;

    }


    @Override
    protected void onResume() {
        super.onResume();
        educationMapView.onResume();
    }

    @Override
    protected void onStart() {
        super.onStart();
        LoadEducationDetail();
        educationMapView.onStart();
    }

    @Override
    protected void onStop() {
        super.onStop();
        educationMapView.onStop();
        educationDetailRef.removeEventListener(valueEventListener);

    }

    @Override
    protected void onPause() {
        super.onPause();
        educationMapView.onPause();
    }

//the button of favorite 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.favorite_menu, menu);

        MenuItem favorite = menu.findItem(R.id.add_to_favorite);
        if (isFavorite) {
            favorite.setIcon(R.drawable.ic_bookmarkadded_24dp);
//            isFavorite = false;
        }
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        // Respond to the action bar's Up/Home button
        if (item.getItemId() == android.R.id.home) {
            onBackPressed();
            return true;
        }
        if (item.getItemId() == R.id.add_to_favorite) {
//this code when the button favorite click
            final String uid = user.getUid();
            final DatabaseReference favoritedb = FirebaseDatabase.getInstance().getReference("Favorite");

            favoritedb.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    if (uid.equals(dataSnapshot.child(uid).getKey())) {
                        if(isFavorite){
                            item.setIcon(R.drawable.ic_unbookmarked_24dp);
                            favoritedb.getRef().child(uid).child(eduKey).removeValue();
                            isFavorite = false;
                        }
                        else{
                            item.setIcon(R.drawable.ic_bookmarkadded_24dp);
                            favoritedb.getRef().child(uid).child(eduKey).setValue(true);
                            isFavorite = true;
                        }


                    } else {
                        item.setIcon(R.drawable.ic_bookmarkadded_24dp);
                        favoritedb.getRef().child(uid).child(eduKey).setValue(true);
                        isFavorite = true;
                    }
                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {

                }
            });
            return true;

        }
        return super.onOptionsItemSelected(item);
    }

}

和列表活动

EducationCategoryActivity.java

/*
 * Copyright 2019 RONINGRUM. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package co.id.roningrum.dolanapptugasakhir.ui.categoryactivity;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.facebook.shimmer.ShimmerFrameLayout;
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 java.util.ArrayList;
import java.util.Arrays;

import co.id.roningrum.dolanapptugasakhir.R;
import co.id.roningrum.dolanapptugasakhir.handler.GPSHandler;
import co.id.roningrum.dolanapptugasakhir.handler.NetworkHelper;
import co.id.roningrum.dolanapptugasakhir.handler.PermissionHandler;
import co.id.roningrum.dolanapptugasakhir.model.TourismItem;
import co.id.roningrum.dolanapptugasakhir.ui.detailactivity.DetailEducatioActivity;
import co.id.roningrum.dolanapptugasakhir.ui.mapsactivity.EducationCategoryMaps;
import co.id.roningrum.dolanapptugasakhir.viewholder.categoryviewholder.EducationViewHolder;

public class EducationCategoryActivity extends AppCompatActivity {

    private RecyclerView rvEducationList;
    private ShimmerFrameLayout shimmerFrameLayout;
    private FirebaseRecyclerAdapter<TourismItem, EducationViewHolder> educationFirebaseAdapter;

    private GPSHandler gpsHandler;
    private PermissionHandler permissionHandler;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_category_education);
        rvEducationList = findViewById(R.id.tourism_education_list);
        Toolbar toolbarEducation = findViewById(R.id.toolbar_top_education);
        shimmerFrameLayout = findViewById(R.id.shimmer_view_container);
        rvEducationList.setLayoutManager(new LinearLayoutManager(this));
        ArrayList<TourismItem> tourismItems = new ArrayList<>();
        setSupportActionBar(toolbarEducation);
        checkConnection();
    }

    private void checkConnection() {
        if (NetworkHelper.isConnectedToNetwork(getApplicationContext())) {
            showData();
        } else {
            Toast.makeText(this, "Check your connection", Toast.LENGTH_SHORT).show();
        }
    }

    private void showData() {
        if (havePermission()) {
            DatabaseReference educationCategoryDB = FirebaseDatabase.getInstance().getReference();
            Query educationQuery = educationCategoryDB.child("Tourism").orderByChild("category_tourism").equalTo("edukasi");
            FirebaseRecyclerOptions<TourismItem> educationOptions = new FirebaseRecyclerOptions.Builder<TourismItem>()
                    .setQuery(educationQuery, TourismItem.class)
                    .build();
            educationFirebaseAdapter = new FirebaseRecyclerAdapter<TourismItem, EducationViewHolder>(educationOptions) {
                @NonNull
                @Override
                public EducationViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
                    return new EducationViewHolder(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_education_category_menu, viewGroup, false));
                }

                @Override
                protected void onBindViewHolder(@NonNull EducationViewHolder holder, int position, @NonNull TourismItem model) {
                    final DatabaseReference educationCategoryRef = getRef(position);
                    final String eductaionKey = educationCategoryRef.getKey();
                    Log.d("Check eduKey", ""+eductaionKey);

                    gpsHandler = new GPSHandler(getApplicationContext());
                    if (gpsHandler.isCanGetLocation()) {
                        double latitude = gpsHandler.getLatitude();
                        double longitude = gpsHandler.getLongitude();

                        Log.i("Message", "CurLoc :" + latitude + "," + longitude);

                        shimmerFrameLayout.stopShimmer();
                        shimmerFrameLayout.setVisibility(View.GONE);

                        holder.showEducationTourismData(model, latitude, longitude);
                        holder.setOnClickListener(new EducationViewHolder.ClickListener() {
                            @Override
                            public void onItemClick(View view, int position) {
                                Intent intent = new Intent(getApplicationContext(), DetailEducatioActivity.class);
                                intent.putExtra(DetailEducatioActivity.EXTRA_WISATA_KEY, eductaionKey);
                                startActivity(intent);
                            }
                        });

                    } else {
                        gpsHandler.stopUsingGPS();
                        gpsHandler.showSettingsAlert();
                    }
                }

//                @NonNull
//                @Override
//                public ShoppingViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
//                    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_menu_shopping_category_tourism, viewGroup, false);
//                    return new ShoppingViewHolder(view);
//                }
            };
            educationFirebaseAdapter.notifyDataSetChanged();
            rvEducationList.setAdapter(educationFirebaseAdapter);
        }
    }

    private boolean havePermission() {
        if (Build.VERSION.SDK_INT >= 23) {
            permissionHandler = PermissionHandler.getInstance(this);
            if (permissionHandler.isAllPermissionAvailable()) {
                Log.d("Pesan", "Permissions have done");
            } else {
                permissionHandler.setActivity(this);
                permissionHandler.deniedPermission();
            }
        } else {
            Toast.makeText(this, "Check your permission", Toast.LENGTH_SHORT).show();
        }
        return true;
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        for (int i : grantResults) {
            if (i == PackageManager.PERMISSION_GRANTED) {
                Log.d("test", "Permission" + Arrays.toString(permissions) + "Success");
            } else {
                //denied
                permissionHandler.deniedPermission(Manifest.permission.ACCESS_FINE_LOCATION);
                permissionHandler.deniedPermission(Manifest.permission.ACCESS_COARSE_LOCATION);
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.toolbar_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.petaMenu) {
            startActivity(new Intent(EducationCategoryActivity.this, EducationCategoryMaps.class));
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onResume() {
        super.onResume();
        shimmerFrameLayout.startShimmer();
        if (educationFirebaseAdapter != null) {
            educationFirebaseAdapter.startListening();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        shimmerFrameLayout.stopShimmer();
        if (educationFirebaseAdapter != null) {
            educationFirebaseAdapter.stopListening();
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        if (educationFirebaseAdapter != null) {
            educationFirebaseAdapter.startListening();
        }

    }

    @Override
    protected void onStop() {
        super.onStop();
        if (educationFirebaseAdapter != null) {
            educationFirebaseAdapter.stopListening();
        }
    }
}

我希望数据存储在收藏夹中时的状态。我尝试添加代码datasnapshot.exist，但无法更改“收藏夹”按钮的颜色。谢谢

在Firebase上存储数据后，如何解决“问题收藏夹”按钮？

0 个答案: