gradle File Update Properly with all new file

app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: 'com.google.gms.google-services'
 
 repositories {
     mavenLocal()
@@ -8,13 +9,13 @@ repositories {
 }
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.1"
+    compileSdkVersion 28
+    buildToolsVersion "29.0.0"
 
     defaultConfig {
         applicationId "com.google.firebase.udacity.friendlychat"
         minSdkVersion 16
-        targetSdkVersion 24
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
     }
@@ -32,12 +33,22 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.google.firebase:firebase-database:16.0.4'
+    implementation 'com.google.firebase:firebase-storage:16.0.4'
+    implementation 'com.google.firebase:firebase-auth:16.0.5'
+    implementation 'com.google.firebase:firebase-messaging:17.3.4'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
 
-    compile 'com.android.support:design:24.2.0'
-    compile 'com.android.support:appcompat-v7:24.2.0'
+
+    implementation 'androidx.appcompat:appcompat:1.1.0'
 
     // Displaying images
-    compile 'com.github.bumptech.glide:glide:3.6.1'
-}
+    implementation 'com.github.bumptech.glide:glide:4.10.0'
+    annotationProcessor 'com.github.bumptech.glide:compiler:4.10.0'
+
+    // Firebase UI Implimentation
+    implementation 'com.firebaseui:firebase-ui-auth:4.3.1'
+
+
+}

app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="com.google.firebase.udacity.friendlychat">
 
     <application
@@ -18,4 +19,5 @@
 
     </application>
 
+
 </manifest>

app/src/main/java/com/google/firebase/udacity/friendlychat/MainActivity.java

@@ -15,8 +15,9 @@
  */
 package com.google.firebase.udacity.friendlychat;
 
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 import android.text.Editable;
 import android.text.InputFilter;
 import android.text.TextWatcher;
@@ -29,33 +30,77 @@
 import android.widget.ImageButton;
 import android.widget.ListView;
 import android.widget.ProgressBar;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+
+
+import com.firebase.ui.auth.AuthUI;
+import com.firebase.ui.auth.IdpResponse;
+import com.google.android.gms.tasks.Continuation;
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.OnSuccessListener;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.auth.FirebaseUser;
+import com.google.firebase.database.ChildEventListener;
+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.annotations.Nullable;
+import com.google.firebase.storage.FirebaseStorage;
+import com.google.firebase.storage.StorageReference;
+import com.google.firebase.storage.UploadTask;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 public class MainActivity extends AppCompatActivity {
 
-    private static final String TAG = "MainActivity";
-
     public static final String ANONYMOUS = "anonymous";
     public static final int DEFAULT_MSG_LENGTH_LIMIT = 1000;
+    private static final String TAG = "MainActivity";
+
+
+    private static final int RC_SIGN_IN = 1;
+    private static final int RC_PHOTO_PICKER = 2;
 
     private ListView mMessageListView;
     private MessageAdapter mMessageAdapter;
     private ProgressBar mProgressBar;
     private ImageButton mPhotoPickerButton;
     private EditText mMessageEditText;
     private Button mSendButton;
-
     private String mUsername;
 
+    private FirebaseDatabase mFirebaseDatabase;
+    private DatabaseReference mMessagesDatabaseReference;
+    private ChildEventListener mChildEventListener;
+    private FirebaseAuth mFirebaseAuth;
+    private FirebaseAuth.AuthStateListener mAuthStateListener;
+    private FirebaseStorage mFirebaseStorage;
+    private StorageReference mChatPhotosStorageReference;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
         mUsername = ANONYMOUS;
 
+
+        // Initialize Firebase components
+        mFirebaseDatabase = FirebaseDatabase.getInstance();
+        mFirebaseAuth = FirebaseAuth.getInstance();
+        mFirebaseStorage = FirebaseStorage.getInstance();
+
+        mMessagesDatabaseReference = mFirebaseDatabase.getReference().child("messages");
+        mChatPhotosStorageReference = mFirebaseStorage.getReference().child("chat_photos");
+
+
         // Initialize references to views
         mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
         mMessageListView = (ListView) findViewById(R.id.messageListView);
@@ -75,7 +120,10 @@ protected void onCreate(Bundle savedInstanceState) {
         mPhotoPickerButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
-                // TODO: Fire an intent to show an image picker
+                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+                intent.setType("image/jpeg");
+                intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
+                startActivityForResult(Intent.createChooser(intent, "Complete action using"), RC_PHOTO_PICKER);
             }
         });
 
@@ -105,11 +153,110 @@ public void afterTextChanged(Editable editable) {
             @Override
             public void onClick(View view) {
                 // TODO: Send messages on click
+                //  Send messages on click
+                FriendlyMessage friendlyMessage = new FriendlyMessage(mMessageEditText.getText().toString(), mUsername, null);
+                mMessagesDatabaseReference.push().setValue(friendlyMessage);
 
                 // Clear input box
                 mMessageEditText.setText("");
             }
         });
+
+
+        mAuthStateListener = new FirebaseAuth.AuthStateListener() {
+            @Override
+            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
+                FirebaseUser user = firebaseAuth.getCurrentUser();
+                if (user != null) {
+                    onSignedInInitialize(user.getDisplayName());
+                } else {
+                    onSignOutCleanup();
+                    startActivityForResult(
+                            AuthUI.getInstance()
+                                    .createSignInIntentBuilder()
+                                    .setIsSmartLockEnabled(false)
+                                    .setAvailableProviders(Arrays.asList(
+                                            new AuthUI.IdpConfig.GoogleBuilder().build(),
+                                            new AuthUI.IdpConfig.EmailBuilder().build(),
+                                            new AuthUI.IdpConfig.PhoneBuilder().build()))
+                                    .build(),
+                            RC_SIGN_IN);
+                }
+            }
+        };
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, @androidx.annotation.Nullable Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+
+
+        switch (requestCode) {
+            case RC_SIGN_IN:
+                if (resultCode == RESULT_OK) {
+                    Toast.makeText(this, "Signed in!", Toast.LENGTH_SHORT).show();
+                } else if (resultCode == RESULT_CANCELED) {
+                    Toast.makeText(this, "Sign in canceled", Toast.LENGTH_SHORT).show();
+                    finish();
+                }
+                break;
+            case RC_PHOTO_PICKER:
+                if (resultCode == RESULT_OK) {
+                    Toast.makeText(this, "picker in!", Toast.LENGTH_SHORT).show();
+                    Uri selectedImageUri = data.getData();
+
+                    // Get a reference to store file at chat_photos/<FILENAME>
+                    final StorageReference photoRef = mChatPhotosStorageReference.child(selectedImageUri.getLastPathSegment());
+
+                    // Upload file to Firebase Storage
+                    photoRef.putFile(selectedImageUri)
+                            .continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
+                                @Override
+                                public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
+                                    if (!task.isSuccessful()) {
+                                        throw task.getException();
+                                    }
+
+                                    // Continue with the task to get the download URL
+                                    return photoRef.getDownloadUrl();
+                                }
+                            }).addOnCompleteListener(new OnCompleteListener<Uri>() {
+                        @Override
+                        public void onComplete(@NonNull Task<Uri> task) {
+                            if (task.isSuccessful()) {
+                                Uri downloadUri = task.getResult();
+                                FriendlyMessage friendlyMessage = new FriendlyMessage(null, mUsername, downloadUri.toString());
+                                mMessagesDatabaseReference.push().setValue(friendlyMessage);
+                            } else {
+                                // Handle failures
+                                // ...
+                            }
+                        }
+                    });
+                }
+                break;
+
+            default:
+                Toast.makeText(this, "Something Wrong", Toast.LENGTH_SHORT).show();
+                break;
+        }
+ }
+
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mFirebaseAuth.addAuthStateListener(mAuthStateListener);
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        if (mAuthStateListener != null) {
+            mFirebaseAuth.removeAuthStateListener(mAuthStateListener);
+        }
+        detachDatabaseReadListener();
+        mMessageAdapter.clear();
     }
 
     @Override
@@ -121,6 +268,67 @@ public boolean onCreateOptionsMenu(Menu menu) {
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        return super.onOptionsItemSelected(item);
+        switch (item.getItemId()) {
+            case R.id.sign_out_menu:
+                AuthUI.getInstance().signOut(this);
+                return true;
+
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void onSignedInInitialize(String username) {
+        mUsername = username;
+        attachDatabaseReadListener();
+
+    }
+
+    private void onSignOutCleanup() {
+        mUsername = ANONYMOUS;
+        mMessageAdapter.clear();
+        detachDatabaseReadListener();
+
+    }
+
+
+    private void attachDatabaseReadListener() {
+        if (mChildEventListener == null) {
+            mChildEventListener = new ChildEventListener() {
+                @Override
+                public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
+                    FriendlyMessage friendlyMessage = dataSnapshot.getValue(FriendlyMessage.class);
+                    mMessageAdapter.add(friendlyMessage);
+                }
+
+                @Override
+                public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
+
+                }
+
+                @Override
+                public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
+
+                }
+
+                @Override
+                public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
+
+                }
+
+                @Override
+                public void onCancelled(@NonNull DatabaseError databaseError) {
+
+                }
+            };
+            mMessagesDatabaseReference.addChildEventListener(mChildEventListener);
+        }
+    }
+
+    private void detachDatabaseReadListener() {
+        if (mChildEventListener != null) {
+            mMessagesDatabaseReference.removeEventListener(mChildEventListener);
+            mChildEventListener = null;
+        }
     }
-}
+}

app/src/main/res/values/strings.xml

@@ -2,4 +2,6 @@
     <string name="app_name">Friendly Chat</string>
     <string name="sign_out">Sign Out</string>
     <string name="send_button_label">Send</string>
+
+
 </resources>

build.gradle

@@ -4,12 +4,17 @@ buildscript {
     repositories {
         jcenter()
         mavenLocal()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath "io.realm:realm-gradle-plugin:6.0.0"
+        classpath 'com.google.firebase:firebase-auth:16.0.5'
+        classpath 'com.google.gms:google-services:4.3.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
+
     }
 }
 
@@ -23,3 +28,12 @@ allprojects {
 task clean(type: Delete) {
     delete rootProject.buildDir
 }
+
+
+allprojects {
+    repositories {
+        jcenter()
+        maven { url 'https://maven.google.com' }
+        google()
+    }
+}