Firebase Storage Example – Uploading and Retrieving Files

September 1, 2017February 24, 2017 by Belal Khan

In a previous tutorial we learnt about Firebase Storage. But I didn’t cover retrieval of the uploaded files from Firebase Storage. So here is another Firebase Storage Example. In this tutorial we will learn Uploading Files to Firebase Storage and Retrieving Uploaded Files from Firebase Storage. So lets start this Firebase Storage Example.

If you are dealing with PDF Files Follow this Tutorial
Firebase Storage Upload and Download PDF Files

Table of Contents

1 Firebase Storage Example Video Demo
2 Firebase Storage Example

Firebase Storage Example Video Demo

You can watch this video to know what we are going to build in this tutorial.

Firebase Storage Example

As always the first step is creating a new Android Studio Project.

Creating a New Project

I have just created a project named FirebaseUpload.
In the project we will be uploading images to Firebase Storage and then we will fetch back the uploaded images to display them into RecyclerView.
So now we will setup firebase storage to our project.

Setting Up Firebase Storage and Firebase Database

We will upload the images to Firebase Storage and in the Firebase Database we will store the image URL. For this we need to setup both in our project.
Go to tools -> firebase

Now you will see an Assistant Window, you can setup Firebase Database from here.

The same way you can setup Firebase Storage.

If you are confused about this step go through the last Firebase Storage Tutorial where I explained it in detail.

Creating Layout

Now we need to build the following layout for activity_main.xml.

firebase storage example — activity_main.xml

We have the following components in the above layout.
Choose Button: We will tap this button to choose an image from the gallery.
EditText Enter Name: In this EditText we will put the label for the chosen image.
ImageView: The middle area (you cann’t see it in the layout because it is blank ImageView) contains an ImageView where we will display the chosen image.
Upload Button: Tapping this button will upload the selected image to Firebase Storage.
TextView Uploads: Tapping this TextView will open another activity where we will display the uploaded images with labels.
You can use the following xml code to build the above layout.

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_main"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="net.simplifiedcoding.firebaseupload.MainActivity">

<LinearLayout

android:id="@+id/linearLayout"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal">

<Button

android:id="@+id/buttonChoose"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text="Choose" />

<EditText

android:id="@+id/editText"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_weight="4"

android:hint="Enter name for Image" />

</LinearLayout>

<ImageView

android:id="@+id/imageView"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:layout_below="@+id/linearLayout" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:orientation="vertical">

<Button

android:id="@+id/buttonUpload"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_weight="1"

android:text="Upload" />

<TextView

android:id="@+id/textViewShow"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="10dp"

android:text="View Uploads"

android:textAlignment="center"

android:textColor="@color/colorPrimary"

android:textStyle="bold" />

</LinearLayout>

</RelativeLayout>

Defining Firebase Constants

Create a java class named Constants.java and define the following.

package net.simplifiedcoding.firebaseupload;

/**

* Created by Belal on 2/23/2017.

public class Constants {

public static final String STORAGE_PATH_UPLOADS = "uploads/";

public static final String DATABASE_PATH_UPLOADS = "uploads";

}

Defining View Objects and Constants

Come inside MainActivity.java and define the following objects and constants.

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

//constant to track image chooser intent

private static final int PICK_IMAGE_REQUEST = 234;

//view objects

private Button buttonChoose;

private Button buttonUpload;

private EditText editTextName;

private TextView textViewShow;

private ImageView imageView;

//uri to store file

private Uri filePath;

//firebase objects

private StorageReference storageReference;

private DatabaseReference mDatabase;

Now inside onCreate() we will initialize the the objects and attach click listeners.

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

buttonChoose = (Button) findViewById(R.id.buttonChoose);

buttonUpload = (Button) findViewById(R.id.buttonUpload);

imageView = (ImageView) findViewById(R.id.imageView);

editTextName = (EditText) findViewById(R.id.editText);

textViewShow = (TextView) findViewById(R.id.textViewShow);

storageReference = FirebaseStorage.getInstance().getReference();

mDatabase = FirebaseDatabase.getInstance().getReference(Constants.DATABASE_PATH_UPLOADS);

buttonChoose.setOnClickListener(this);

buttonUpload.setOnClickListener(this);

textViewShow.setOnClickListener(this);

}

Adding File Chooser

Define a new method showFileChooser().

private void showFileChooser() {

Intent intent = new Intent();

intent.setType("image/*");

intent.setAction(Intent.ACTION_GET_CONTENT);

startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);

}

Now we need to handle the Intent result. For this we will override the method onActivityResult().

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {

filePath = data.getData();

try {

Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);

imageView.setImageBitmap(bitmap);

} catch (IOException e) {

e.printStackTrace();

}

Now we will call the method showFileChooser() when the choose image button is clicked. For this come inside the overriden method onClick() and write the following code.

@Override

public void onClick(View view) {

if (view == buttonChoose) {

showFileChooser();

} else if (view == buttonUpload) {

} else if (view == textViewShow) {

}

Now try running the application and you will see that choose image is working fine.

Now we will code the upload functionality.

Uploading File to Firebase Storage and Saving URL to Firebase Database

Building Database Model

First we will create a class to store the Image data to Firebase Database. So create a class named Upload.java.

package net.simplifiedcoding.firebaseupload;

import com.google.firebase.database.IgnoreExtraProperties;

/**

* Created by Belal on 2/23/2017.

@IgnoreExtraProperties

public class Upload{

public String name;

public String url;

// Default constructor required for calls to

// DataSnapshot.getValue(User.class)

public Upload() {

}

public Upload(String name, String url) {

this.name = name;

this.url= url;

}

public String getName() {

return name;

}

public String getUrl() {

return url;

}

Getting Selected File Extension

We will rename the file to a unique name as if we upload the file with same name then files would be overwritten. So after renaming the file the extension should remain the same. So inside MainActivity.java create a method getFileExtension() and it will return as the extension of the selected file by taking Uri object.

public String getFileExtension(Uri uri) {

ContentResolver cR = getContentResolver();

MimeTypeMap mime = MimeTypeMap.getSingleton();

return mime.getExtensionFromMimeType(cR.getType(uri));

}

Uploading the File to Firebase Storage

Now we will create a method inside MainActivity.java that will upload the selected file to Firebase Storage. So create a method name uploadFile() and write the following code.

private void uploadFile() {

//checking if file is available

if (filePath != null) {

//displaying progress dialog while image is uploading

final ProgressDialog progressDialog = new ProgressDialog(this);

progressDialog.setTitle("Uploading");

progressDialog.show();

//getting the storage reference

StorageReference sRef = storageReference.child(Constants.STORAGE_PATH_UPLOADS + System.currentTimeMillis() + "." + getFileExtension(filePath));

//adding the file to reference

sRef.putFile(filePath)

.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {

@Override

public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

//dismissing the progress dialog

progressDialog.dismiss();

//displaying success toast

Toast.makeText(getApplicationContext(), "File Uploaded ", Toast.LENGTH_LONG).show();

//creating the upload object to store uploaded image details

Upload upload = new Upload(editTextName.getText().toString().trim(), taskSnapshot.getDownloadUrl().toString());

//adding an upload to firebase database

String uploadId = mDatabase.push().getKey();

mDatabase.child(uploadId).setValue(upload);

}

})

.addOnFailureListener(new OnFailureListener() {

@Override

public void onFailure(@NonNull Exception exception) {

progressDialog.dismiss();

Toast.makeText(getApplicationContext(), exception.getMessage(), Toast.LENGTH_LONG).show();

}

})

.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {

@Override

public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {

//displaying the upload progress

double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();

progressDialog.setMessage("Uploaded " + ((int) progress) + "%...");

}

});

} else {

//display an error if no file is selected

}

Now we need to call this method on Upload Button Click. So modify onClick() method as below.

@Override

public void onClick(View view) {

if (view == buttonChoose) {

showFileChooser();

} else if (view == buttonUpload) {

uploadFile();

} else if (view == textViewShow) {

}

Now try running your application and upload will work.

Retrieving Files from Firebase Storage

Now we will create a new activity where we display all the uploaded images with labels.
So create a new activity named ShowImagesActivity and inside the layout file of this activity we will create a RecyclerView.

Adding RecyclerView and CardView

First we need to add dependencies for RecyclerView and CardView.
Go to File -> Project Structure and go to dependencies tab. Here click on plus icon and select Library dependency.

Now here you need to find and add RecyclerView and CardView.

Now sync your project.

Adding Glide

We also need to add Glide Library. As we need to fetch images from the URL and for this I will be using Glide Library.
So just modify dependencies block of your app level build.gradle file as below.

dependencies {

compile fileTree(include: ['*.jar'], dir: 'libs')

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

exclude group: 'com.android.support', module: 'support-annotations'

})

compile 'com.android.support:appcompat-v7:25.2.0'

compile 'com.google.firebase:firebase-storage:10.2.0'

compile 'com.google.firebase:firebase-auth:10.2.0'

compile 'com.google.firebase:firebase-database:10.2.0'

testCompile 'junit:junit:4.12'

compile 'com.android.support:recyclerview-v7:25.2.0'

compile 'com.android.support:cardview-v7:25.2.0'

//adding glid library

compile 'com.github.bumptech.glide:glide:3.7.0'

}

Now sync the project with gradle.

Creating RecyclerView Layout

Now we will design the layout for our RecyclerView. It will contain an ImageView and a TextView inside a CardView. So create a new layout resource file named layout_images.xml.

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical">

<android.support.v7.widget.CardView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_margin="8dp"

android:padding="8dp">

<RelativeLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:minHeight="100dp">

<TextView

android:id="@+id/textViewName"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Name"

android:textAlignment="center" />

<ImageView

android:id="@+id/imageView"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@id/textViewName" />

</RelativeLayout>

</android.support.v7.widget.CardView>

</LinearLayout>

So our layout for RecyclerView is ready. Now we will create an Adapter.

Creating RecyclerView Adapter

Create a class named MyAdapter.java and write the following code.

package net.simplifiedcoding.firebaseupload;

import android.content.Context;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

import com.bumptech.glide.Glide;

import java.util.List;

/**

* Created by Belal on 2/23/2017.

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

private Context context;

private List<Upload> uploads;

public MyAdapter(Context context, List<Upload> uploads) {

this.uploads = uploads;

this.context = context;

}

@Override

public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

View v = LayoutInflater.from(parent.getContext())

.inflate(R.layout.layout_images, parent, false);

ViewHolder viewHolder = new ViewHolder(v);

return viewHolder;

}

@Override

public void onBindViewHolder(ViewHolder holder, int position) {

Upload upload = uploads.get(position);

holder.textViewName.setText(upload.getName());

Glide.with(context).load(upload.getUrl()).into(holder.imageView);

}

@Override

public int getItemCount() {

return uploads.size();

}

class ViewHolder extends RecyclerView.ViewHolder {

public TextView textViewName;

public ImageView imageView;

public ViewHolder(View itemView) {

super(itemView);

textViewName = (TextView) itemView.findViewById(R.id.textViewName);

imageView = (ImageView) itemView.findViewById(R.id.imageView);

}

Now come inside layout file of this ShowImagesActivity and add a RecyclerView.

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_show_images"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="net.simplifiedcoding.firebaseupload.ShowImagesActivity">

<android.support.v7.widget.RecyclerView

android:id="@+id/recyclerView"

android:layout_width="match_parent"

android:layout_height="wrap_content">

</android.support.v7.widget.RecyclerView>

</RelativeLayout>

Now write the following code inside ShowImagesActivity.java

package net.simplifiedcoding.firebaseupload;

import android.app.ProgressDialog;

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.widget.Toast;

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 java.util.ArrayList;

import java.util.List;

public class ShowImagesActivity extends AppCompatActivity {

//recyclerview object

private RecyclerView recyclerView;

//adapter object

private RecyclerView.Adapter adapter;

//database reference

private DatabaseReference mDatabase;

//progress dialog

private ProgressDialog progressDialog;

//list to hold all the uploaded images

private List<Upload> uploads;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_show_images);

recyclerView = (RecyclerView) findViewById(R.id.recyclerView);

recyclerView.setHasFixedSize(true);

recyclerView.setLayoutManager(new LinearLayoutManager(this));

progressDialog = new ProgressDialog(this);

uploads = new ArrayList<>();

//displaying progress dialog while fetching images

progressDialog.setMessage("Please wait...");

progressDialog.show();

mDatabase = FirebaseDatabase.getInstance().getReference(Constants.DATABASE_PATH_UPLOADS);

//adding an event listener to fetch values

mDatabase.addValueEventListener(new ValueEventListener() {

@Override

public void onDataChange(DataSnapshot snapshot) {

//dismissing the progress dialog

progressDialog.dismiss();

//iterating through all the values in database

for (DataSnapshot postSnapshot : snapshot.getChildren()) {

Upload upload = postSnapshot.getValue(Upload.class);

uploads.add(upload);

}

//creating adapter

adapter = new MyAdapter(getApplicationContext(), uploads);

//adding adapter to recyclerview

recyclerView.setAdapter(adapter);

}

@Override

public void onCancelled(DatabaseError databaseError) {

progressDialog.dismiss();

}

});

}

Thats it now just run your application and you will see all the fetched images in the next activity.

Bingo! Its working absolutely fine. Now if you are having troubles or confusions you can get my source code from the link given below.

So thats it for Firebase Storage Example. If you are facing problems then let me know in the comment section and I will try to help you out. Also don’t forget to share this Firebase Storage Example if you found it useful. Thank You 🙂

Belal Khan

Hi, my name is Belal Khan and I am a Google Developers Expert (GDE) for Android. The passion of teaching made me create this blog. If you are an Android Developer, or you are learning about Android Development, then I can help you a lot with Simplified Coding.

Checkout these tutorials as well:

92 thoughts on “Firebase Storage Example – Uploading and Retrieving Files”

Anonymous
February 25, 2017 at 3:15 am
tq belal khan you are the best.. but how can i use this for pdf file? any idea? your help will be appreciated..
Reply
- Belal Khan
  February 25, 2017 at 3:22 am
  In file chooser method instead of this
  intent.setType(“image/*”);
  use this
  intent.setType(“application/pdf”);
  Reply
  - vicky
    June 4, 2018 at 2:46 pm
    Mr. Belal Reply for this:
    i got error on Tasksnapshot , taskSnapshot.getDownloadUrl().toString());
    i give permission to write external storage too…
    Reply
    - Swapnil Kant
      June 14, 2018 at 5:10 pm
      i am also getting the same error please help
      Reply
      - Abhiraman Kuntimaddi
        August 11, 2018 at 8:39 am
        getDownloadUrl() is deprecated.
        In order to use that you have to write or add the following
        taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
    - CodeX
      October 4, 2018 at 2:23 pm
      You need to change your Firebase database,storage & authentication dependencies version. I am sure it is 10.0.1 like. To slove this error change dependencies 11.0.4 like version
      Reply
    - parth
      January 13, 2019 at 5:48 pm
      write storageref.getDownloadUrl().toString()); new firebase version has changed so
      Reply
- Hamza Ali
  June 2, 2020 at 8:43 am
  images is not shown only name is shown
  Reply
Aaditya
March 7, 2017 at 7:11 pm
The Recycler view is empty and does not show the uploaded images. Please help
Reply
- Aaditya
  March 8, 2017 at 9:13 am
  Hello. Thanks a lot for this tutorial. How can i display the username of the person uploading the image.
  Reply
- Rp
  March 10, 2017 at 1:23 pm
  the Recycler view is empty and does not show the uploaded images. Please help me 2.
  Reply
  - Aaditya
    March 10, 2017 at 6:12 pm
    Add compile ‘com.android.support:recyclerview-v7:25.2.0’ to your app gradle
    Reply
    - Jonh
      March 11, 2017 at 12:00 am
      I get an error when I add that, is version 25 necessary?
      Reply
      - Aaditya
        March 11, 2017 at 6:02 am
        No. Just add the recycler view in the app gradle
    - John
      March 15, 2017 at 1:23 am
      I added it, still says RecyclerView is empty
      Reply
      - uzma
        March 18, 2020 at 8:39 pm
        hi please help me my images are not showing..please hlp
  - Mintu rabha
    May 3, 2017 at 7:19 am
    check you might haven’t add cardview dependency…
    Reply
- Soundarya
  March 25, 2017 at 11:41 am
  Please check whether you have added the rules for Firebase database. Like below
  {
  “rules”: {
  “.read”: true,
  “.write”: true
  }
  }
  Also check permission in manifest,
  Reply
  - Zakaria Mansoor
    June 15, 2017 at 2:00 pm
    this solved by prob, thanx (Y)
    Reply
  - sagar
    September 3, 2018 at 7:08 pm
    what about the manifest permissions can you explain please
    Reply
- sunil
  February 13, 2019 at 7:47 am
  1..
  StorageReference sRef = storageReference.child( Constants.STORAGE_PATH_UPLOADS + System.currentTimeMillis() + “.” + getFileExtension( filePath ) );
  result—–.> uploads/1550043505776.jpeg
  2.taskSnapshot.getMetadata().getReference().getDownloadUrl().toString();
  result—–> com.google.android.gms.tasks.zzu@3aa2b058
  3. Retreiveing same url but i am getting diffferent one and its completely different
  for (DataSnapshot postSnapshot : snapshot.getChildren()) {
  Upload upload = postSnapshot.getValue(Upload.class);
  uploads.add(upload);
  }
  result——-> com.google.android.gms.tasks.zzu@65b5a96
  Reply
Ali
March 14, 2017 at 1:41 pm
Hello,
You didn’t handle READ_EXTERNAL_STORAGE, this permission is considered a dangerous permission and runtime permission should be handled,
Am i missing something here?
Thanks
Reply
- KIVANÇ
  March 29, 2017 at 4:16 pm
  This could help;
  Under your class line
  -public static final int REQUEST_ID_MULTIPLE_PERMISSIONS = 2017;
  and check this method in “onCreate”
  -if (!checkAndRequestPermissions()) {
  return;
  }
  here is multiple request permission method,
  private boolean checkAndRequestPermissions() {
  int permissionINTERNET = ContextCompat.checkSelfPermission(this, android.Manifest.permission.INTERNET);
  int permissionACCESS_NETWORK_STATE = ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_NETWORK_STATE);
  int permissionREAD_EXTERNAL_STORAGE = ContextCompat.checkSelfPermission(this, android.Manifest.permission.READ_EXTERNAL_STORAGE);
  int permissionWRITE_EXTERNAL_STORAGE = ContextCompat.checkSelfPermission(this, android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
  List listPermissionsNeeded = new ArrayList();
  if (permissionINTERNET != PackageManager.PERMISSION_GRANTED) {
  listPermissionsNeeded.add(android.Manifest.permission.INTERNET);
  }
  if (permissionACCESS_NETWORK_STATE != PackageManager.PERMISSION_GRANTED) {
  listPermissionsNeeded.add(android.Manifest.permission.ACCESS_NETWORK_STATE);
  }
  if (permissionREAD_EXTERNAL_STORAGE != PackageManager.PERMISSION_GRANTED) {
  listPermissionsNeeded.add(android.Manifest.permission.READ_EXTERNAL_STORAGE);
  }
  if (permissionWRITE_EXTERNAL_STORAGE != PackageManager.PERMISSION_GRANTED) {
  listPermissionsNeeded.add(android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
  }
  if (!listPermissionsNeeded.isEmpty()) {
  ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), REQUEST_ID_MULTIPLE_PERMISSIONS);
  return false;
  }
  return true;
  }
  hope this help. 🙂
  Reply
- Hafiz
  September 24, 2017 at 3:44 am
  bro go to storage section. then select rules tab. there you will see instructions to enable API and a link for this purpose will be given in these instructions. Go and just follow link.and after this, again go to rule tab of storage just make little amendment i.e. replace != with ==
  Reply
Vishalkumar
March 15, 2017 at 4:26 pm
Can we view the uploaded file offline after downloading
Reply
Manivanna perumal
March 17, 2017 at 7:49 am
i got error on Tasksnapshot , taskSnapshot.getDownloadUrl().toString());
i give permission to write external storage too…
it show “This method should only be accessed from tests or within private scope less… (Ctrl+F1)
This inspection looks at Android API calls that have been annotated with various support annotations (such as RequiresPermission or UiThread) and flags any calls that are not using the API correctly as specified by the annotations. Examples of errors flagged by this inspection:
Passing the wrong type of resource integer (such as R.string) to an API that expects a different type (such as R.dimen).
Forgetting to invoke the overridden method (via super) in methods that require it
Calling a method that requires a permission without having declared that permission in the manifest
Passing a resource color reference to a method which expects an RGB integer value.
…and many more”
Reply
- KIVANÇ
  March 29, 2017 at 4:11 pm
  You should check this link.
  http://stackoverflow.com/questions/41105586/android-firebase-tasksnapshot-method-should-only-be-accessed-within-privat
  Reply
angel
March 20, 2017 at 9:00 am
The images are not displaying when i click view upload button. i have already include all the libraries. Still it is not working. please help
Reply
- Rahul
  July 2, 2019 at 11:36 am
  same here it is giving an error E/RecyclerView: No adapter attached; skipping layout .
  can you please help me
  Reply
Kıvanç
March 29, 2017 at 3:45 pm
Thanks Belal, works perfectly.
Reply
- KIVANÇ
  March 30, 2017 at 10:59 pm
  Sorry for bothering, I tried to make delete function like this:
  private boolean deleteImage(String id) {
  DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference(Constants.DATABASE_PATH_UPLOADS).child(id);
  // Delete the file
  mDatabase.removeValue();
  // announcement that image deleted.
  Toast.makeText(getApplicationContext(), “Image Deleted”, Toast.LENGTH_LONG).show();
  return true;
  }
  But not succeed, how can I do this?
  Reply
shalika
April 3, 2017 at 12:41 pm
i upload pdf file . how to show pdf file image recycleview
Reply
Sadeny
April 8, 2017 at 9:58 am
Hello,
This is a nice tutorial. I got this error while adding the realtime database to my app
Error:(28, 13) Failed to resolve: com.google.firebase:firebase-auth:9.2.1
you can help me
Reply
- Mohan
  May 4, 2017 at 10:54 am
  Add the dependencies of firesbase in app gradle.
  Reply
radhey
April 12, 2017 at 12:20 pm
how to retrieve data in gridview
Reply
Suha
April 18, 2017 at 5:32 pm
How to delete an image in this tutorial?
Reply
Ng R
April 24, 2017 at 10:47 pm
I got an error
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ri.cesic/com.example.ri.cesic.UploadActivity}: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference
What is wrong?
Reply
Mintu rabha
May 3, 2017 at 7:27 am
can i view the uploaded files in different application….
Reply
Mohan
May 4, 2017 at 10:52 am
when I click upload button it shows me the users does not have permission to access this project. can anyone tell me to resolve this.
Reply
- Anurag
  June 25, 2017 at 6:44 pm
  Add these permissions, should resolve the issue:
  Reply
Ali
June 11, 2017 at 11:25 am
which Method call on textviewshow Button ..
Reply
- sinclairion
  April 21, 2019 at 2:02 pm
  on textviewshow Button:
  Intent intent = new Intent (this, ShowImagesActivity.class);
  startActivity(intent);
  Reply
Anurag
June 25, 2017 at 6:38 pm
Hello,
In the last activity (ShowImagesActivity.java), in the line:
mDatabase = FirebaseDatabase.getInstance().getReference(Constants.DATABASE_PATH_UPLOADS);
the parameter –> Constants.DATABASE_PATH_UPLOADS is throwing error. Please help. All the dependencies and the files are added properly and manifest is also updated.
Reply
- Anurag
  June 25, 2017 at 6:41 pm
  The error is :
  “Cannot resolve symbol ‘Constants’ “
  Reply
Anurag
June 25, 2017 at 10:16 pm
I am getting the folowing error:
java.lang.NullPointerException: Attempt to invoke interface method ‘int java.util.List.size()’ on a null object reference
at com.example.anurag_g01.secretspace.UploadImageAdapter.getItemCount(UploadImageAdapter.java:50)
Reply
- Anurag
  June 25, 2017 at 10:18 pm
  When ShowImagesActivity is called, then I am getting the above error
  Reply
kalyan
June 30, 2017 at 1:03 pm
how to display the scanned code in imageview using firebase
Reply
Francisco
August 2, 2017 at 10:35 pm
Belal, i need help in a code, I have several data in the firebase database, a latitude and a longitude in the children, I want to retrieve all this data and add bookmarks in Google Maps in the app. I made this code below and it is giving error. What did I do wrong?
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
DatabaseReference ref = FirebaseDatabase.getInstance().getReference();
ref.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
double latitude = dataSnapshot.child(“latitude”).getValue(Double.class);
double longitude = dataSnapshot.child(“longitude”).getValue(Double.class);
LatLng local = new LatLng(latitude, longitude);
mMap.addMarker(new MarkerOptions().position(local).title(“New Marker”));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(local,18));
} else {
Log.e(TAG, “onDataChange: No data”);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
throw databaseError.toException();
}
});
Reply
Dhan
August 20, 2017 at 6:35 pm
Images are not displayed in recyclerView please help me
Reply
Suyog
August 30, 2017 at 6:32 am
its give me filename= null due to this it unable to upload image in this
Reply
Ozge
September 9, 2017 at 3:27 pm
Hi, thanks for tutorial it works great :)) Can I make the same app with videos ? I change intent.setType but it’s only affects uploading as I understand. How can I retrieve videos and see them in recyclerview??
Reply
poeja
September 29, 2017 at 11:25 am
hai, this is great tutorial
i want to ask a question. How to sort it with the lastest upload?
i mean, in the view uploads, how can we show the newest uploaded images on the top? when i try to upload a new images it will be on the bottom of the list.
thanks for that
Reply
Mohammed Nashit
October 10, 2017 at 7:21 am
Thank you belal bhai… You are the best…. was trying this from past 1 week…. your code did the work in 1 hr 😛
Reply
Karthikeyan
October 10, 2017 at 9:57 pm
HI, how to compress and upload photo file to firebase storage..
Reply
najeeb
October 15, 2017 at 3:06 am
i want o display firebase images in deatail activity on click ……………………………………..!!!
Reply
zaid
October 16, 2017 at 10:39 am
how i appply click events on this images?
Reply
Rahul Roushan
October 30, 2017 at 1:36 pm
when i click on view uploads app gets crashed please help me
Reply
Ferdi
November 3, 2017 at 8:59 pm
can someone help me? image not displaying, i do everything on the tutorial
Reply
Divya
November 20, 2017 at 6:00 am
With URL we can load images into Imageview but How can we save the images and audio uploads in firebase to our sdcard
Reply
Steve
November 26, 2017 at 8:03 am
Thank you Belal Khan, btw can i use this method to upload text file as well?
Reply
vinayak
January 5, 2018 at 4:56 am
i click choose button and selecting an image from gallery but the image is not displayed in image view.and when i click upload it shows unknown error occurred
Reply
vijay
January 10, 2018 at 2:24 pm
Hi
I am vijay, from this tutorial when i show image and text on another activity then it show “permission denied”.
please help me.
Reply
raja
February 17, 2018 at 5:14 pm
how to see uploaded photos through by viewupload(textview)..please help me.
Reply
mahad
June 14, 2018 at 6:18 pm
Thank you for the tutorial everything works fine. if i manually upload a file using the firebase console and then click on view to see the images on the firebase it only shows images that i have uploaded from my own phone. not the one present on the firebase storage.
Reply
bhumi
July 13, 2018 at 12:45 pm
I’m not getting image in my recyclerview using this tutorial
Reply
Zeeshan Rehmat
July 17, 2018 at 8:07 pm
I have a question.How we can retrieve specific images from firebase storage by providing some parameters.
Like i say i only need those images whose name is XYZ.
Reply
Dangdat Raymond
August 8, 2018 at 9:13 pm
You are the best and most generous programmer. You will always be at the top. Thank you so much
Reply
Paul
August 10, 2018 at 11:59 am
Images are not displayed in recyclerView please help me.
Thanks!
Reply
Serenity
August 16, 2018 at 7:28 am
Really Nice And Informative tutorial God Bless!!! Please just one more request could be greatly appreciated which is how to download the image back to our internal storage. Thanks
Reply
sagar
September 3, 2018 at 7:01 pm
cannot see my image in the recycler view retriving from firebase
Reply
Siddharth J
November 26, 2018 at 12:02 pm
Hello! I am not able to see the images in the recycler view.
Reply
Sagar
February 4, 2019 at 6:24 pm
I’m continuously getting error at this line
Upload upload = postSnapshot.getValue(Upload.class);
Reply
- Belal Khan
  February 22, 2019 at 12:03 pm
  You should tell the error message as well.
  Reply
sunil
February 13, 2019 at 1:24 pm
This code upload image and save its URL in firebase Database pls use it ..
private void uploadFile1() {
if (filePath != null) {
progressDialog = new ProgressDialog( this );
progressDialog.setTitle( “Uploading..” );
progressDialog.show();
final StorageReference storageFileAddress = storageReference.child( Constants.STORAGE_PATH_UPLOADS + System.currentTimeMillis() + “.” + getFileExtension( filePath ) );
storageFileAddress.putFile( filePath )
.addOnSuccessListener( new OnSuccessListener() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
//dismissing the progress dialog
progressDialog.dismiss();
storageFileAddress.getDownloadUrl().addOnSuccessListener( new OnSuccessListener() {
@Override
public void onSuccess(Uri uri) {
Upload upload = new Upload( editTextName.getText().toString().trim(), uri.toString() );
String uploadId = mDatabase.push().getKey();
mDatabase.child( uploadId ).setValue( upload );
}
} );
}
} )
.addOnFailureListener( new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception exception) {
progressDialog.dismiss();
Toast.makeText( getApplicationContext(), exception.getMessage(), Toast.LENGTH_LONG ).show();
}
} )
.addOnProgressListener( new OnProgressListener() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
//displaying the upload progress
double progress = (100.0 * taskSnapshot.getBytesTransferred()) / taskSnapshot.getTotalByteCount();
progressDialog.setMessage( “Uploaded ” + ((int) progress) + “%…” );
}
} );
} else {
//display an error if no file is selected
}
}
Reply
Rohit
February 27, 2019 at 2:44 pm
The image is not getting displayed in the image view
Reply
jamal
March 9, 2019 at 6:43 pm
taskSnapshot.getDownloadUrl().toString());
sir at .getDownloadUrl() giving error i replace it with getUploadSessionUri() but in can’t uploading image. giving an unknown error
Reply
- Phystick
  May 3, 2019 at 4:21 pm
  replace with taskSnapshot.getMetadata().getReference().getDownloadUrl().toString()
  Reply
Md Toufiq
March 22, 2019 at 5:04 am
Please help me I m getting error while displaying the images in recycler view and I have checked permission project and also firebase console.
W/SyncTree: Listen at /uploads failed: DatabaseError: Permission denied
Reply
Rama Krishna
March 25, 2019 at 10:40 am
Thank you Brother, I like your kotlin android videos. Just now I learned firebase kotlin from your video. I am requesting you to make a firestore kotlin video from step by step. I am getting any video for that in the internet. If I got also they are not explaining from step by step like you.
Reply
Akil
April 1, 2019 at 6:48 am
My viewUploadImage is not working— i mean when i click on view uploads no action is performed what the reason behind it.
Reply
ajay
April 18, 2019 at 9:15 pm
else if (view == textViewShow) {
which fuction we have to call here ..?
}
Reply
Heena Dhawan
May 17, 2019 at 11:11 am
please check the http result code and inner exception for server response
m getting this while m upload the file pls help
Reply
Jay Mbuvi
July 16, 2019 at 1:38 pm
is this ok?
else if (view == textViewShow) {
startActivity(new Intent(this,ShowImagesActivity.class));
}
Reply
Riflan Ahmed
July 31, 2019 at 3:35 pm
Thank you for the tutorial with code. all the working properly but the picture is not retrieving from the firebase but the name is retrieving perfectly.
Can you please provide me a help
Reply
uzma
March 18, 2020 at 9:06 pm
hi my recycler view doesnot sgow images it just show height and width with nme of recycler view but images are not showing in it.plese hhelp me ASAP
Reply
Maulik Patel
April 13, 2020 at 8:08 am
In my project when i click on upload button then loading is continuesly running.image are not completely upload and progressbar only 0% show
Reply
Lee Chan Sheng
June 17, 2020 at 3:25 am
Sir, may I know how to pass data value from another activity to MyAdapter.java? Because I need to do some calculation and display in the adapter. It was appreciated if sir could help me. Thank you very much
Reply
Ayush Suri
June 22, 2020 at 12:19 pm
My image is uploading properly but I can’t retrieve the image from the database. Only the text is coming. Can you please help me out.
Reply
Abdulmuiz
December 23, 2021 at 5:13 pm
why my images are not displaying in my app, and give me this error “java.io.FileNotFoundException(open failed: ENOENT (No such file or directory))” in my logcat
Reply
Kousar
October 22, 2022 at 1:02 am
Sir please make an app toturial
1)upload image without text but in different categories in firebase
2)retrieve them in gridview recycler view in different categories like gallery
Reply
Kousar
October 22, 2022 at 1:05 am
Sir creat an app toturial
1) upload image to firebase without text but in different categories
2)retrieve them in gridview recycler view under different categories.
Please sir…
Please
Reply
Azhar
October 22, 2022 at 1:07 am
Sir creat an app toturial
upload image to firebase but in different categories and retrieve them in gridview recycler view under different categories like in wallpaper apps.
Reply

Firebase Storage Example – Uploading and Retrieving Files

Firebase Storage Example Video Demo

Firebase Storage Example

Creating a New Project

Setting Up Firebase Storage and Firebase Database

Creating Layout

Defining Firebase Constants

Defining View Objects and Constants

Adding File Chooser

Uploading File to Firebase Storage and Saving URL to Firebase Database

Building Database Model

Getting Selected File Extension

Uploading the File to Firebase Storage

Retrieving Files from Firebase Storage

Adding RecyclerView and CardView

Adding Glide

Creating RecyclerView Layout

Creating RecyclerView Adapter

Related

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