initial version of firebase demo app

LectureExamples/FirebaseDemo/.gitignore

+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild

LectureExamples/FirebaseDemo/app/.gitignore

+/build

LectureExamples/FirebaseDemo/app/build.gradle

+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
+    defaultConfig {
+        applicationId "com.example.andrejrasevic.firebasedemo"
+        minSdkVersion 21
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    packagingOptions {
+        exclude 'META-INF/LICENSE'
+        exclude 'META-INF/LICENSE-FIREBASE.txt'
+        exclude 'META-INF/NOTICE'
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:26.+'
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    compile 'com.android.support:design:26.+'
+    testCompile 'junit:junit:4.12'
+    compile 'com.google.firebase:firebase-database:9.0.2'
+}
+
+apply plugin: 'com.google.gms.google-services'
\ No newline at end of file

LectureExamples/FirebaseDemo/app/google-services.json

+{
+  "project_info": {
+    "project_number": "77138995653",
+    "firebase_url": "https://fir-demo-d5acb.firebaseio.com",
+    "project_id": "fir-demo-d5acb",
+    "storage_bucket": "fir-demo-d5acb.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:77138995653:android:3bbf6679b995f089",
+        "android_client_info": {
+          "package_name": "com.example.andrejrasevic.firebasedemo"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "77138995653-bmqmnhtg7v4541nqomd5naaerpb3b09s.apps.googleusercontent.com",
+          "client_type": 1,
+          "android_info": {
+            "package_name": "com.example.andrejrasevic.firebasedemo",
+            "certificate_hash": "aa7678e284ae6dfe2dff484bc15e39584babf847"
+          }
+        },
+        {
+          "client_id": "77138995653-sd30rjcl79cre19f6rsd4lhr8pvkue4c.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyCOy_SFjTswVh7DrmL54LJHUOLdmB2y_Ys"
+        }
+      ],
+      "services": {
+        "analytics_service": {
+          "status": 1
+        },
+        "appinvite_service": {
+          "status": 2,
+          "other_platform_oauth_client": [
+            {
+              "client_id": "77138995653-sd30rjcl79cre19f6rsd4lhr8pvkue4c.apps.googleusercontent.com",
+              "client_type": 3
+            }
+          ]
+        },
+        "ads_service": {
+          "status": 2
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}
\ No newline at end of file

LectureExamples/FirebaseDemo/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/andrej.rasevic/Library/Android/sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

LectureExamples/FirebaseDemo/app/src/androidTest/java/com/example/andrejrasevic/firebasedemo/ExampleInstrumentedTest.java

+package com.example.andrejrasevic.firebasedemo;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.example.andrejrasevic.firebasedemo", appContext.getPackageName());
+    }
+}

LectureExamples/FirebaseDemo/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.andrejrasevic.firebasedemo">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:theme="@style/AppTheme.NoActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file

LectureExamples/FirebaseDemo/app/src/main/java/com/example/andrejrasevic/firebasedemo/MainActivity.java

+package com.example.andrejrasevic.firebasedemo;
+
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.view.View;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ListView;
+
+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.Query;
+import com.google.firebase.database.ValueEventListener;
+
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // Get ListView object from xml
+        final ListView listView = (ListView) findViewById(R.id.listView);
+
+        // Create a new Adapter
+        final ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
+                android.R.layout.simple_list_item_1, android.R.id.text1);
+
+        // Assign adapter to ListView
+        listView.setAdapter(adapter);
+
+        // Connect to the Firebase database
+        FirebaseDatabase database = FirebaseDatabase.getInstance();
+
+        // Get a reference to the todoItems child items it the database
+        final DatabaseReference myRef = database.getReference("todoItems");
+
+        // Assign a listener to detect changes to the child items
+        // of the database reference.
+        myRef.addChildEventListener(new ChildEventListener(){
+
+            // This function is called once for each child that exists
+            // when the listener is added. Then it is called
+            // each time a new child is added.
+            @Override
+            public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
+                String value = dataSnapshot.getValue(String.class);
+                adapter.add(value);
+            }
+
+            // This function is called each time a child item is removed.
+            public void onChildRemoved(DataSnapshot dataSnapshot){
+                String value = dataSnapshot.getValue(String.class);
+                adapter.remove(value);
+            }
+
+            // The following functions are also required in ChildEventListener implementations.
+            public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName){}
+            public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName){}
+
+            @Override
+            public void onCancelled(DatabaseError error) {
+                // Failed to read value
+                Log.w("TAG:", "Failed to read value.", error.toException());
+            }
+        });
+
+
+        // Add items via the Button and EditText at the bottom of the window.
+        final EditText text = (EditText) findViewById(R.id.todoText);
+        final Button button = (Button) findViewById(R.id.addButton);
+
+        button.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+
+                // Create a new child with a auto-generated ID.
+                DatabaseReference childRef = myRef.push();
+
+                // Set the child's data to the value passed in from the text box.
+                childRef.setValue(text.getText().toString());
+
+            }
+        });
+
+        // Delete items when clicked
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+
+            public void onItemClick(AdapterView<?> parent, View view,
+                                    int position, long id) {
+
+                Query myQuery = myRef.orderByValue().equalTo((String)
+                        listView.getItemAtPosition(position));
+
+                myQuery.addListenerForSingleValueEvent(new ValueEventListener() {
+                    @Override
+                    public void onDataChange(DataSnapshot dataSnapshot) {
+                        if (dataSnapshot.hasChildren()) {
+                            DataSnapshot firstChild = dataSnapshot.getChildren().iterator().next();
+                            firstChild.getRef().removeValue();
+                        }
+                    }
+
+                    @Override
+                    public void onCancelled(DatabaseError databaseError) {
+                    }
+                })
+                ;}
+        })
+        ;}
+}

LectureExamples/FirebaseDemo/app/src/main/res/layout/activity_main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<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:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"
+    android:orientation="vertical">
+
+    <ListView
+        android:id="@+id/listView"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+    </ListView>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_gravity="bottom">
+        <EditText
+            android:id="@+id/todoText"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"/>
+        <Button
+            android:id="@+id/addButton"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content"
+            android:text="Add New Item"/>
+    </LinearLayout>
+</LinearLayout>
\ No newline at end of file

LectureExamples/FirebaseDemo/app/src/main/res/layout/content_main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout 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"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context="com.example.andrejrasevic.firebasedemo.MainActivity"
+    tools:showIn="@layout/activity_main">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</android.support.constraint.ConstraintLayout>

LectureExamples/FirebaseDemo/app/src/main/res/menu/menu_main.xml

+<menu 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"
+    tools:context="com.example.andrejrasevic.firebasedemo.MainActivity">
+    <item
+        android:id="@+id/action_settings"
+        android:orderInCategory="100"
+        android:title="@string/action_settings"
+        app:showAsAction="never" />
+</menu>