Firebase-Save-Images

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"

    tools:context="com.tabian.firebaseuploadimage.MainActivity">

<ScrollView
    android:id="@+id/login_form"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/email_login_form"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">



        <EditText
            android:id="@+id/email"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Email"
            android:inputType="textEmailAddress"
            android:maxLines="1"/>



        <EditText
            android:id="@+id/password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Password"
            android:imeActionId="@+id/login"
            android:imeOptions="actionUnspecified"
            android:inputType="textPassword"
            android:maxLines="1"
            />

        <Button
            android:id="@+id/email_sign_in_button"
            style="?android:textAppearanceSmall"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Sign In"
            android:textStyle="bold"/>

        <Button
            android:id="@+id/email_sign_out_button"
            style="?android:textAppearanceSmall"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Sign out"
            android:textStyle="bold"/>

        <Button
            android:id="@+id/upload_screen"
            style="?android:textAppearanceSmall"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Upload"
            android:textStyle="bold"/>

    </LinearLayout>
</ScrollView>
    </LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.tabian.firebaseuploadimage">

    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.STORAGE" />


    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity android:name=".UploadActivity"></activity>
    </application>

</manifest>

MainActivity.java

package com.tabian.firebaseuploadimage;

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;

    // UI references.
    private EditText mEmail, mPassword;
    private Button btnSignIn, btnSignOut, btnUploadImage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //declare buttons and edit texts in oncreate
        mEmail = (EditText) findViewById(R.id.email);
        mPassword = (EditText) findViewById(R.id.password);
        btnSignIn = (Button) findViewById(R.id.email_sign_in_button);
        btnSignOut = (Button) findViewById(R.id.email_sign_out_button);
        btnUploadImage = (Button) findViewById(R.id.upload_screen);

        mAuth = FirebaseAuth.getInstance();

        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) {
                    // User is signed in
                    Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
                    toastMessage("Successfully signed in with: " + user.getEmail());
                } else {
                    // User is signed out
                    Log.d(TAG, "onAuthStateChanged:signed_out");
                    toastMessage("Successfully signed out.");
                }
                // ...
            }
        };

        btnSignIn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String email = mEmail.getText().toString();
                String pass = mPassword.getText().toString();
                if (!email.equals("") && !pass.equals("")) {
                    mAuth.signInWithEmailAndPassword(email, pass);
                } else {
                    toastMessage("You didn't fill in all the fields.");
                }
            }
        });

        btnSignOut.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mAuth.signOut();
                toastMessage("Signing Out...");
            }
        });

        btnUploadImage.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.d(TAG, "onClick: Switching Activities.");
                Intent intent = new Intent(MainActivity.this, UploadActivity.class);
                startActivity(intent);
            }
        });
    }

    @Override
    public void onStart() {
        super.onStart();
        mAuth.addAuthStateListener(mAuthListener);
    }

    @Override
    public void onStop() {
        super.onStop();
        if (mAuthListener != null) {
            mAuth.removeAuthStateListener(mAuthListener);
        }
    }

    //add a toast to show when successfully signed in

    /**
     * customizable toast
     *
     * @param message
     */
    private void toastMessage(String message) {
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }
}

upload_layout.xml

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

    <Button
        android:text="Upload"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="13dp"
        android:id="@+id/btnUploadImage"/>

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btnUploadImage"
        android:layout_centerHorizontal="true">

        <Button
            android:text="Back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="13dp"
            android:layout_marginLeft="5dp"
            android:id="@+id/btnBackImage"
            />

        <Button
            android:text="Next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="13dp"
            android:layout_marginLeft="5dp"
            android:id="@+id/btnNextImage"
            android:layout_toRightOf="@+id/btnBackImage"/>



    </RelativeLayout>


    <ImageView
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/uploadImage"
        />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_below="@+id/uploadImage"
        android:id="@+id/imageName"
        android:hint="Enter image name"/>


</RelativeLayout>

UploadActivity.java

package com.tabian.firebaseuploadimage;

import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;

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

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;

/**
 * Created by User on 2/13/2017.
 */

public class UploadActivity extends AppCompatActivity {

    private static final String TAG = "UploadActivity";

    //declare variables
    private ImageView image;
    private EditText imageName;
    private Button btnUpload,btnNext,btnBack;
    private ProgressDialog mProgressDialog;

    private final static int mWidth = 512;
    private final static int mLength = 512;

    private ArrayList<String> pathArray;
    private int array_position;

    private StorageReference mStorageRef;
    private FirebaseAuth auth;

    public UploadActivity() {
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.upload_layout);
        image = (ImageView) findViewById(R.id.uploadImage);
        btnBack = (Button) findViewById(R.id.btnBackImage);
        btnNext = (Button) findViewById(R.id.btnNextImage);
        btnUpload = (Button) findViewById(R.id.btnUploadImage);
        imageName = (EditText) findViewById(R.id.imageName);
        pathArray = new ArrayList<>();
        mProgressDialog = new ProgressDialog(UploadActivity.this);
        auth = FirebaseAuth.getInstance();

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

        checkFilePermissions();

        addFilePaths();

        btnBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(array_position > 0){
                    Log.d(TAG, "onClick: Back an Image.");
                    array_position = array_position - 1;
                    loadImageFromStorage();
                }
            }
        });

        btnNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(array_position < pathArray.size() - 1){
                    Log.d(TAG, "onClick: Next Image.");
                    array_position = array_position + 1;
                    loadImageFromStorage();
                }
            }
        });

        btnUpload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.d(TAG, "onClick: Uploading Image.");
                mProgressDialog.setMessage("Uploading Image...");
                mProgressDialog.show();

                //get the signed in user
                FirebaseUser user = auth.getCurrentUser();
                String userID = user.getUid();

                String name = imageName.getText().toString();
                if(!name.equals("")){
                    Uri uri = Uri.fromFile(new File(pathArray.get(array_position)));
                    StorageReference storageReference = mStorageRef.child("images/users/" + userID + "/" + name + ".jpg");
                    storageReference.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                            // Get a URL to the uploaded content
                            Uri downloadUrl = taskSnapshot.getDownloadUrl();
                            toastMessage("Upload Success");
                            mProgressDialog.dismiss();
                        }
                    }).addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            toastMessage("Upload Failed");
                            mProgressDialog.dismiss();
                        }
                    })
                    ;
                }

            }
        });

    }

    /**
     * Add the file paths you want to use into the array
     */
    private void addFilePaths(){
        Log.d(TAG, "addFilePaths: Adding file paths.");
        String path = System.getenv("EXTERNAL_STORAGE");
        pathArray.add(path+"/Pictures/Portal/image1.jpg");
        pathArray.add(path+"/Pictures/Portal/image2.jpg");
        pathArray.add(path+"/Pictures/Portal/image3.jpg");
        loadImageFromStorage();
    }

    private void loadImageFromStorage()
    {
        try{
            String path = pathArray.get(array_position);
            File f=new File(path, "");
            Bitmap b = BitmapFactory.decodeStream(new FileInputStream(f));
            image.setImageBitmap(b);
        }catch (FileNotFoundException e){
            Log.e(TAG, "loadImageFromStorage: FileNotFoundException: " + e.getMessage() );
        }

    }

    private void checkFilePermissions() {
        if(Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP){
            int permissionCheck = UploadActivity.this.checkSelfPermission("Manifest.permission.READ_EXTERNAL_STORAGE");
            permissionCheck += UploadActivity.this.checkSelfPermission("Manifest.permission.WRITE_EXTERNAL_STORAGE");
            if (permissionCheck != 0) {
                this.requestPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE,android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1001); //Any number
            }
        }else{
            Log.d(TAG, "checkBTPermissions: No need to check permissions. SDK version < LOLLIPOP.");
        }
    }

    /**
     * customizable toast
     * @param message
     */
    private void toastMessage(String message){
        Toast.makeText(this,message,Toast.LENGTH_SHORT).show();
    }

}