- First of all you have to link your project with firebase.Then you have to add fcm sdk as usually do. Thereafter you have to visit Project setting under the Service Accounts & Select java & click on Generate new pair.
It will download json file and the you have to copy json data and paste it into below class as i have pasted.
- Add this in gradle app level , in android block
packagingOptions {
exclude("META-INF/DEPENDENCIES")
}
implementation("com.google.auth:google-auth-library-oauth2-http:1.3.0") - Add this class in your any package
If you're using Java language then,
import com.google.auth.oauth2.GoogleCredentials;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
public class AccessToken {
private static final String firebaseMessagingScope = "https://www.googleapis.com/auth/firebase.messaging";
public String getAccessToken() {
try {
String jsonString = "{\n" +
" \"type\": \"service_account\",\n" +
" \"project_id\": \"chatapp-7ecbf\",\n" +
" \"private_key_id\": \"4a398ff3e104e2ee7b6a8661b9984d570e49d061\",\n" +
" \"private_key\": \"-----BEGIN PRIVATE KEY-----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\\nWHbKnZpMxq8FQKKAS/UcNLM=\\n-----END PRIVATE KEY-----\\n\",\n" +
" \"client_email\": \"firebase-adminsdk-wnhtk@chatapp-7ecbf.iam.gserviceaccount.com\",\n" +
" \"client_id\": \"104302022244565034113\",\n" +
" \"auth_uri\": \"https://accounts.google.com/o/oauth2/auth\",\n" +
" \"token_uri\": \"https://oauth2.googleapis.com/token\",\n" +
" \"auth_provider_x509_cert_url\": \"https://www.googleapis.com/oauth2/v1/certs\",\n" +
" \"client_x509_cert_url\": \"https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-wnhtk%40chatapp-7ecbf.iam.gserviceaccount.com\",\n" +
" \"universe_domain\": \"googleapis.com\"\n" +
"}\n";
InputStream stream = new ByteArrayInputStream(jsonString.getBytes(StandardCharsets.UTF_8));
GoogleCredentials googleCredentials = GoogleCredentials.fromStream(stream).createScoped(firebaseMessagingScope);
googleCredentials.refresh();
return googleCredentials.getAccessToken().getTokenValue();
} catch (Exception e) {
Log.e("roshan", "getAccessToken: " + e.getLocalizedMessage());
return null;
}
}
}
- If you're using Kotlin Language & want in singleton object.
object AccessToken1 {
private const val FIREBASE_MESSAGING_SCOPE =
"https://www.googleapis.com/auth/firebase.messaging"
fun getAccessToken(): String? {
try {
val jsonString = """
{
"type": "service_account",
"project_id": "chatapp-7ecbf",
"private_key_id": "4a398ff3e104e2ee7b6a8661b9984d570e49d061",
"private_key": "-----BEGIN PRIVATE KEY-----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\nWHbKnZpMxq8FQKKAS/UcNLM=\n-----END PRIVATE KEY-----",
"client_email": "firebase-adminsdk-wnhtk@chatapp-7ecbf.iam.gserviceaccount.com",
"client_id": "104302022244565034113",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-wnhtk%40chatapp-7ecbf.iam.gserviceaccount.com",
"universe_domain": "googleapis.com"
}
""".trimIndent()
val stream: InputStream =
ByteArrayInputStream(jsonString.toByteArray(StandardCharsets.UTF_8))
val googleCredentials =
GoogleCredentials.fromStream(stream).createScoped(listOf(FIREBASE_MESSAGING_SCOPE))
googleCredentials.refresh()
return googleCredentials.accessToken.tokenValue
} catch (e: Exception) {
println(e.localizedMessage)
return null
}
}
} - If you want in kotlin class only,
class AccessToken1 {
private companion object {
private const val FIREBASE_MESSAGING_SCOPE =
"https://www.googleapis.com/auth/firebase.messaging"
}
fun getAccessToken(): String? {
try {
val jsonString = """
{
"type": "service_account",
"project_id": "chatapp-7ecbf",
"private_key_id": "4a398ff3e104e2ee7b6a8661b9984d570e49d061",
"private_key": "-----BEGIN PRIVATE KEY-----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\nWHbKnZpMxq8FQKKAS/UcNLM=\n-----END PRIVATE KEY-----",
"client_email": "firebase-adminsdk-wnhtk@chatapp-7ecbf.iam.gserviceaccount.com",
"client_id": "104302022244565034113",
"auth_uri": "https://accounts.google.com/o/oauth2/auth",
"token_uri": "https://oauth2.googleapis.com/token",
"auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
"client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-wnhtk%40chatapp-7ecbf.iam.gserviceaccount.com",
"universe_domain": "googleapis.com"
}
""".trimIndent()
val stream: InputStream =
ByteArrayInputStream(jsonString.toByteArray(StandardCharsets.UTF_8))
val googleCredentials =
GoogleCredentials.fromStream(stream).createScoped(listOf(FIREBASE_MESSAGING_SCOPE))
googleCredentials.refresh()
return googleCredentials.accessToken.tokenValue
} catch (e: Exception) {
println(e.localizedMessage)
return null
}
}
} - Now in Mainactivity,
lifecycleScope.launch(Dispatchers.IO) {
val accessToken=AccessToken()
val data= AccessToken1.getAccessToken()
Log.e(TAG, "accesstoken is: $data", )
} - This code could be changed as per the created class.
Now, You have to put accesstoken in your authorization field with bearer {accessToken}
And you'll receive notification.
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