upload images code

main java

package com.google.top.my;

import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.provider.MediaStore;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;

import java.util.UUID;

public class MainActivity extends AppCompatActivity {
    Button chooseImg, uploadImg;
    ImageView imgView;
    int PICK_IMAGE_REQUEST = 111;
    Uri filePath;
    ProgressDialog pd;

    //creating reference to firebase storage    FirebaseStorage storage = FirebaseStorage.getInstance();
    StorageReference storageRef = storage.getReferenceFromUrl("gs://wallpaper-app-1b2cd.appspot.com");    //change the url according to your firebase app

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

        chooseImg = (Button)findViewById(R.id.chooseImg);
        uploadImg = (Button)findViewById(R.id.uploadImg);
        imgView = (ImageView)findViewById(R.id.imgView);

        pd = new ProgressDialog(this);
        pd.setMessage("Uploading....");


        chooseImg.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_PICK);
                startActivityForResult(Intent.createChooser(intent, "Select Image"), PICK_IMAGE_REQUEST);
            }
        });

        uploadImg.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                if(filePath != null) {
                    pd.show();
                    String imageID = UUID.randomUUID().toString();
                    StorageReference childRef = storageRef.child(imageID);

                    //uploading the image                    UploadTask uploadTask = childRef.putFile(filePath);

                    uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                           @Override                             public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                            pd.dismiss();
                            Toast.makeText(MainActivity.this, "Upload successful", Toast.LENGTH_SHORT).show();
                        }
                    });

                     uploadTask.addOnFailureListener(new OnFailureListener() {
                        @Override                        public void onFailure(@NonNull Exception e) {
                            pd.dismiss();
                            Toast.makeText(MainActivity.this, "Upload Failed -> " + e, Toast.LENGTH_SHORT).show();
                        }
                    });
                }
                else {
                    Toast.makeText(MainActivity.this, "Select an image", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }

                       @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 {
                //getting image from gallery                    Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);

                //Setting image to ImageView                         imgView.setImageBitmap(bitmap);
                        } catch (Exception e) {
                         e.printStackTrace();
                   }
        }
    }
}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity">


    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Choose Image"        android:id="@+id/chooseImg"/>

    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Upload Image"        android:id="@+id/uploadImg"/>

    <ImageView        android:layout_width="match_parent"        android:layout_height="300dp"        android:id="@+id/imgView"/>


</LinearLayout>




appp


implementation 'com.google.firebase:firebase-storage:16.0.4'implementation 'com.google.firebase:firebase-auth:16.0.5'
apply plugin: 'com.google.gms.google-services'








classpath 'com.google.gms:google-services:4.2.0'