2019-11-17 18:31:03.218 22198-22198/com.example.musicmates W/FirebaseRecyclerAdapter: com.google.firebase.database.DatabaseException: Firebase Database error: Permission denied
at com.google.firebase.database.DatabaseError.toException(Unknown Source:26)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onCancelled(FirebaseRecyclerAdapter.java:122)
at com.firebase.ui.database.ObservableSnapshotArray.notifyListenersOnCancelled(ObservableSnapshotArray.java:116)
at com.firebase.ui.database.FirebaseArray.onCancelled(FirebaseArray.java:144)
at com.google.android.gms.internal.px.zza(Unknown Source:2)
at com.google.android.gms.internal.vh.zzHX(Unknown Source:4)
at com.google.android.gms.internal.vp.run(Unknown Source:71)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
2019-11-17 18:31:03.219 22198-22198/com.example.musicmates W/FirebaseRecyclerAdapter: com.google.firebase.database.DatabaseException: Firebase Database error: Permission denied
at com.google.firebase.database.DatabaseError.toException(Unknown Source:26)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onCancelled(FirebaseRecyclerAdapter.java:122)
at com.firebase.ui.database.ObservableSnapshotArray.notifyListenersOnCancelled(ObservableSnapshotArray.java:116)
at com.firebase.ui.database.FirebaseArray.onCancelled(FirebaseArray.java:144)
at com.google.android.gms.internal.to.zza(Unknown Source:2)
at com.google.android.gms.internal.vh.zzHX(Unknown Source:4)
at com.google.android.gms.internal.vp.run(Unknown Source:71)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
2019-11-17 18:31:03.284 22198-22225/com.example.musicmates W/SyncTree: Listen at /Users/bSct8nl961Pf9N9Napf68m6hAzZ2 failed: DatabaseError: Permission denied
这些是我的代码
package com.example.musicmates;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.appcompat.widget.Toolbar;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.android.material.navigation.NavigationView;
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.ValueEventListener;
import com.google.firebase.storage.FirebaseStorage;
import com.squareup.picasso.Picasso;
import java.util.Set;
import de.hdodenhof.circleimageview.CircleImageView;
public class MainActivity extends AppCompatActivity {
private NavigationView navigationView;
private DrawerLayout drawerLayout;
private RecyclerView postList;
private Toolbar mToolbar;
private CircleImageView NavProfileImage;
private TextView NavProfileUserName;
private ActionBarDrawerToggle actionBarDrawerToggle;
private FirebaseAuth mAuth;
private DatabaseReference UsersRef, PostsRef;
private ImageButton AddNewPostButton;
String currentUserID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigationView = findViewById(R.id.navigaition_view);
postList = findViewById(R.id.all_users_post_list);
postList.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
// set post from latest to oldest
postList.setLayoutManager(linearLayoutManager);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");
PostsRef = FirebaseDatabase.getInstance().getReference().child("Posts");
mToolbar = findViewById(R.id.main_page_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("Home");
AddNewPostButton = findViewById(R.id.add_new_post_button);
drawerLayout = findViewById(R.id.drawable_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(MainActivity.this,drawerLayout,R.string.drawer_open,R.string.drawer_close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
View navView = navigationView.inflateHeaderView(R.layout.navigation_header);
NavProfileImage = navView.findViewById(R.id.nav_profile_image);
NavProfileUserName = navView.findViewById(R.id.nav_profile_full_name);
UsersRef.child(currentUserID).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
if(dataSnapshot.exists())
{
if(dataSnapshot.hasChild("fullname"))
{
String fullname = dataSnapshot.child("fullname").getValue().toString();
NavProfileUserName.setText(fullname);
}
if(dataSnapshot.hasChild("profileimage"))
{
String image = dataSnapshot.child("profileimage").getValue().toString();
Glide.with(MainActivity.this).load(image).into(NavProfileImage);
}
else
{
Toast.makeText(MainActivity.this, "Profile name do not exists...", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
UserMenuSelector(menuItem);
return false;
}
});
AddNewPostButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SendUserToPostActivity();
}
});
DisplayAllUsersPosts();
}
private void DisplayAllUsersPosts() // retrieve all posts from Firebase Database
{
FirebaseRecyclerAdapter<Posts,PostViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Posts, PostViewHolder>(
Posts.class,
R.layout.all_posts_layout,
PostViewHolder.class,
PostsRef
) {
@Override
protected void populateViewHolder(PostViewHolder viewHolder, Posts model, int position)
{
viewHolder.setFullname(model.getFullname());
viewHolder.setTime(model.getTime());
viewHolder.setDate(model.getDate());
viewHolder.setDescription(model.getDescription());
viewHolder.setProfileimage(getApplicationContext() , model.getProfileimage());
viewHolder.setPostimage(getApplicationContext(),model.getPostimage());
}
};
postList.setAdapter(firebaseRecyclerAdapter);
}
public static class PostViewHolder extends RecyclerView.ViewHolder
{
View mView;
public PostViewHolder(@NonNull View itemView)
{
super(itemView);
mView = itemView;
}
public void setFullname(String fullname)
{
TextView username = (TextView) mView.findViewById(R.id.post_user_name);
username.setText(fullname);
}
public void setProfileimage(Context ctx ,String profileimage)
{
CircleImageView image = (CircleImageView) mView.findViewById(R.id.post_profile_image);
Glide.with(ctx).load(profileimage).into(image);
}
public void setTime(String time)
{
TextView PostTime = (TextView) mView.findViewById(R.id.post_time);
PostTime.setText(" " + time);
}
public void setDate(String date)
{
TextView PostDate = (TextView) mView.findViewById(R.id.post_date);
PostDate.setText(" "+ date);
}
public void setDescription(String description)
{
TextView PostDescription = (TextView) mView.findViewById(R.id.post_description);
PostDescription.setText(description);
}
public void setPostimage(Context ctx, String postimage)
{
ImageView PostImage = (ImageView) mView.findViewById(R.id.post_image);
Glide.with(ctx).load(postimage).into(PostImage);
}
}
private void SendUserToPostActivity()
{
Intent addNewPostIntent = new Intent(MainActivity.this,PostActivity.class);
startActivity(addNewPostIntent);
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = mAuth.getCurrentUser();
if(currentUser == null || currentUserID == null){
SendUserToLoginActivity();
}
else{
CheckUserExistence();
}
}
private void CheckUserExistence()
{
final String current_user_id = mAuth.getCurrentUser().getUid();
UsersRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot)
{
if(!dataSnapshot.hasChild(current_user_id))
{
SendUserToSetupActivity();
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void SendUserToSetupActivity() {
Intent setupIntent = new Intent(MainActivity.this, SetupActivity.class);
setupIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(setupIntent);
finish();
}
private void SendUserToLoginActivity() {
Intent loginIntent = new Intent(MainActivity.this,LoginActivity.class);
loginIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(loginIntent);
finish();
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
if(actionBarDrawerToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
private void UserMenuSelector(MenuItem menuItem) {
switch (menuItem.getItemId()){
case R.id.nav_post:
SendUserToPostActivity();
break;
case R.id.nav_profile:
Toast.makeText(this, "Profile", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_home:
Toast.makeText(this, "Home", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_friends:
Toast.makeText(this, "Friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_find_friends:
Toast.makeText(this, "Find Friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_message:
Toast.makeText(this, "Message", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_setting:
Toast.makeText(this, "Setting", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_logout:
Toast.makeText(this, "Log out", Toast.LENGTH_SHORT).show();
mAuth.signOut();
SendUserToLoginActivity();
break;
}
}
}
您必须授予.read对Firebase数据库的访问权限。