Android Firebase下载声音

Posted 2021-05-02

我在android应用程序上工作，我需要从firebase存储下载一些声音，我从firebase实时数据库中获取声音名称。

我的代码：

public class DataSyncFb extends AsyncTask<Void, Integer, Void> {


private Context context;
private StorageReference mStorageRef;


public DataSyncFb(final Context context) {
    this.context = context;
}

@Override
protected void onPreExecute() {
    super.onPreExecute();
    Log.i("DataSincFB", "onPreExecute");
}


@Override
protected Void doInBackground(Void... voids) {
    final DatabaseHandler db = new DatabaseHandler(context);
    final FirebaseDatabase database = FirebaseDatabase.getInstance();

    DatabaseReference dbRef = database.getReference("categorie");
    dbRef.addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            try {
                List<String> listCat = db.getAllCategoriesId();
                List<String> listSounds = db.getAllSoundsId();
                Log.i("test", String.valueOf(dataSnapshot.getValue()));
                Gson test = new Gson();

                JSONArray jsonArray = new JSONArray(test.toJson(dataSnapshot.getValue()));

                for (int i = 0; i < jsonArray.length(); i++){
                    JSONObject cat = jsonArray.getJSONObject(i);
                    String nom = cat.getString("nom");
                    String id = cat.getString("id");
                    if (!listCat.contains(id)) {
                        db.addCategorie(nom, id);
                    }

                    JSONArray sounds = cat.getJSONArray("son");
                    Log.i("cat", sounds.toString());
                    for (int j = 0; j < sounds.length(); j++){
                        JSONObject sound = sounds.getJSONObject(j);
                        String soundId = sound.getString("id");
                        if (!listSounds.contains(soundId)){

                            downloadSound();
                            db.addSound(soundId, sound.getString("nom"), sound.getString("lien") ,id);

                        }

                    }
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
    return null;
}

@Override
protected void onPostExecute(Void aVoid) {
    Log.i("DataSyncFB", "onPostExecute");
}

private void downloadSound(){
    Log.v("download", "in function");

    try {
        StorageReference islandRef = FirebaseStorage.getInstance().getReferenceFromUrl("gs://soundbox-a6dd8.appspot.com").child("cjpcommodelouisxv.mp3");


        File localFile = null;

        localFile = File.createTempFile("cjpcommodelouisxv", "mp3");
        islandRef.getFile(localFile).addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot) {
                Log.v("download", "Success");
                // Local temp file has been created
            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) {
                // Handle any errors
                Log.e("download", "Error");

            }
        });
    } catch (IOException e) {
        e.printStackTrace();
    }
}

我收到此错误：

E/StorageException: StorageException has occurred.                                                                              User does not have permission to access this object.                                                     Code: -13021 HttpResult: 403
E/firebase: ;local tem file not created  created com.google.firebase.storage.StorageException: User does not have permission to access this object.
E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.firebase.internal.api.FirebaseNoSignedInUserException: Please sign in before trying to get a token.
W/NetworkRequest: no auth token for request

我尝试更改Firebase>存储中的规则，但没有任何效果。如果您有任何想法来解决我的问题。谢谢您帮忙。

编辑：

service firebase.storage {
 match /b/soundbox-a6dd8.appspot.com/o {
   match /{allPaths=**} {
     // Allow access by all users
     allow read, write: if true;
   }
 }
}

新错误：E / firebase :;已创建本地tem文件/storage/emulated/0/cjpcommodelouisxv/cjpcommodelouisxv.mp3 E / StorageUtil：获取令牌java.util.concurrent.ExecutionException：com.google.firebase.internal.api时出错。 FirebaseNoSignedInUserException：请在尝试获取令牌之前登录。 W / NetworkRequest：请求没有身份验证令牌

答案

您的存储安全规则可能有一个

allow write: if request.auth !=null

子句，在这里您似乎没有使用FirebaseAuth来验证用户。

对于测试，建议您使用signInAnonymously（）方法并在写入存储之前透明地签署用户。

FirebaseAuth mAuth = FirebaseAuth.getInstance(); 

然后在进行任何你正在做的事情之前登录

FirebaseUser user = mAuth.getCurrentUser();  
if (user != null) { 
     // do your stuff
} else { 
    signInAnonymously(); 
}

signInAnonymously（）方法如下

private void signInAnonymously(){ 
    mAuth.signInAnonymously().addOnSuccessListener(this, new OnSuccessListener<AuthResult>() {
        @Override public void onSuccess(AuthResult authResult) { 
             // do your stuff
         }
     }) .addOnFailureListener(this, new OnFailureListener() { 
            @Override public void onFailure(@NonNull Exception exception) { 
                  Log.e("TAG", "signInAnonymously:FAILURE", exception);
             }
     }); 
}

同样在Firebase控制台中，在身份验证>登录方法下，启用匿名登录

这可以解决您的问题

或者，如果您不希望对测试进行身份验证，请遵循以下规则：

allow write: if true;

这只是测试，因为这是基本的公共访问

然后，您可以根据您的规则调整身份验证方法。

如果您的规则不是我指定的规则，请分享您的规则，以便我们可以相应地指导您，而不是猜测和猜测