Implementing Firebase Invites On Android

Saravanan Selvaraju
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In this article, I am going to demonstrate how to implement Firebase Invites on Android. Firebase Invites is a solution for app referrals and sharing via email or SMS.

Firebase

Firebase is a back-end tool offered by Google for mobile and web applications. It offers Analytics, Cloud Messaging, Real-time Database, Storage, Remote Configuration, Notification, Crash Reporting, API’s, Multiple Authentication types, Hosting, Dynamic Links, and Invites. Google Firebase helps to develop the application rapidly.

Requirements

Android Studio.
Google Account.

Creating Project

Open Android Studio and create a new project.

After creating the project, select “Add Firebase to your Android app” in Firebase Overview page.

After adding an application, give your Android application a package name, App nickname, debug signing certificate SHA-1, and hit the "REGISTER APP" button.

Now, download the Google-Services.json file and add it in the app folder of your application.

Adding Dependencies

We need to add dependencies for Google Services and Firebase Invites.

Add the dependencies plug-in to App Gradle for Google Firebase Invites.

compile 'com.google.firebase:firebase-invites:10.0.1'

Add Gradle plug-in (build.gradle(app)) at the end of the code.

apply plugin: 'com.google.gms.google-services'

Add classpath plug-in to the project gradle.

classpath 'com.google.gms:google-services:3.0.0'

Creating Layout

Now, go to the activity_main.xml and paste the below code.

<?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:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="io.github.saravanan_selvaraju.firebaseinvites.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/msg_txt"
android:textSize="28dp"
android:padding="10dp"
android:layout_margin="10dp"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="center"
android:layout_margin="15dp"
android:padding="15dp">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/invie_btn"
android:background="@color/colorPrimary"
android:text="@string/invite_txt"
android:textColor="@android:color/white"
android:textStyle="bold"/>
</LinearLayout>
</LinearLayout>

Creating Activity

Write the below code inside “button onclick listener()” method for sending invitations.

private void onInviteClicked() {
Intent intent = new AppInviteInvitation.IntentBuilder(getString(R.string.invitation_title))
.setMessage(getString(R.string.invitation_message))
.build();
startActivityForResult(intent, REQUEST_INVITE);
}

Add String Resources in string.xml file.

<resources>
<string name="invitation_title">Firebase Invite</string>
<string name="invitation_message">Hey there, I found a app....</string>
</resources>

This onActivityResult() method calls back the MainActivity after the user sends an invite.

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult: requestCode=" + requestCode + ", resultCode=" + resultCode);
if (requestCode == REQUEST_INVITE) {
if (resultCode == RESULT_OK) {
String[] ids = AppInviteInvitation.getInvitationIds(resultCode, data);
for (String id : ids) {
Log.d(TAG, "onActivityResult: sent invitation " + id);
}
} else {
}
}
}

MainActivity.java

package io.github.saravanan_selvaraju.firebaseinvites;
import android.content.Intent;
import android.net.Uri;
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 com.google.android.gms.appinvite.AppInvite;
import com.google.android.gms.appinvite.AppInviteInvitation;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_INVITE =100 ;
private static final String TAG =MainActivity.class.getSimpleName() ;
private Button Invite_btn;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Invite_btn = (Button) findViewById(R.id.invie_btn);
Invite_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onInviteClicked();
}
});
}
private void onInviteClicked() {
Intent intent = new AppInviteInvitation.IntentBuilder(getString(R.string.invitation_title))
.setMessage(getString(R.string.invitation_message))
.build();
startActivityForResult(intent, REQUEST_INVITE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult: requestCode=" + requestCode + ", resultCode=" + resultCode);
if (requestCode == REQUEST_INVITE) {
if (resultCode == RESULT_OK) {
String[] ids = AppInviteInvitation.getInvitationIds(resultCode, data);
for (String id : ids) {
Log.d(TAG, "onActivityResult: sent invitation " + id);
}
} else {
}
}
}
}