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port functions snippets from quickstart-android (firebase#350)
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‎functions/app/src/main/java/devrel/firebase/google/com/functions/MainActivity.java‎

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*/
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package devrel.firebase.google.com.functions;
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import android.os.Bundle;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.appcompat.app.AppCompatActivity;
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import com.google.android.gms.tasks.Continuation;
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import com.google.android.gms.tasks.OnCompleteListener;
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import com.google.android.gms.tasks.Task;
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import com.google.firebase.functions.FirebaseFunctions;
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import com.google.firebase.functions.FirebaseFunctionsException;
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import com.google.firebase.functions.HttpsCallableResult;
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import java.util.HashMap;
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import java.util.Map;
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public class MainActivity extends AppCompatActivity {
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// [START define_functions_instance]
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private FirebaseFunctions mFunctions;
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// [END define_functions_instance]
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@Override
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protected void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// [START initialize_functions_instance]
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mFunctions = FirebaseFunctions.getInstance();
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// [END initialize_functions_instance]
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}
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public void emulatorSettings() {
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// [START functions_emulator_connect]
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// 10.0.2.2 is the special IP address to connect to the 'localhost' of
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// [END functions_emulator_connect]
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}
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// [START function_add_numbers]
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private Task<Integer> addNumbers(int a, int b) {
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// Create the arguments to the callable function, which are two integers
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Map<String, Object> data = new HashMap<>();
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data.put("firstNumber", a);
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data.put("secondNumber", b);
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// Call the function and extract the operation from the result
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return mFunctions
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.getHttpsCallable("addNumbers")
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.call(data)
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.continueWith(new Continuation<HttpsCallableResult, Integer>() {
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@Override
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public Integer then(@NonNull Task<HttpsCallableResult> task) throws Exception {
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// This continuation runs on either success or failure, but if the task
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// has failed then getResult() will throw an Exception which will be
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// propagated down.
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Map<String, Object> result = (Map<String, Object>) task.getResult().getData();
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return (Integer) result.get("operationResult");
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}
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});
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}
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// [END function_add_numbers]
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// [START function_add_message]
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private Task<String> addMessage(String text) {
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// Create the arguments to the callable function.
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Map<String, Object> data = new HashMap<>();
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data.put("text", text);
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data.put("push", true);
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return mFunctions
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.getHttpsCallable("addMessage")
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.call(data)
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.continueWith(new Continuation<HttpsCallableResult, String>() {
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@Override
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public String then(@NonNull Task<HttpsCallableResult> task) throws Exception {
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// This continuation runs on either success or failure, but if the task
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// has failed then getResult() will throw an Exception which will be
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// propagated down.
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String result = (String) task.getResult().getData();
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return result;
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}
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});
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}
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// [END function_add_message]
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private void callAddNumbers(int firstNumber, int secondNumber) {
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// [START call_add_numbers]
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addNumbers(firstNumber, secondNumber)
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.addOnCompleteListener(new OnCompleteListener<Integer>() {
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@Override
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public void onComplete(@NonNull Task<Integer> task) {
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if (!task.isSuccessful()) {
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Exception e = task.getException();
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if (e instanceof FirebaseFunctionsException) {
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FirebaseFunctionsException ffe = (FirebaseFunctionsException) e;
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// Function error code, will be INTERNAL if the failure
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// was not handled properly in the function call.
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FirebaseFunctionsException.Code code = ffe.getCode();
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// Arbitrary error details passed back from the function,
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// usually a Map<String, Object>.
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Object details = ffe.getDetails();
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}
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}
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}
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});
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// [END call_add_numbers]
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}
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private void callAddMessage(String inputMessage) {
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// [START call_add_message]
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addMessage(inputMessage)
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.addOnCompleteListener(new OnCompleteListener<String>() {
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@Override
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public void onComplete(@NonNull Task<String> task) {
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if (!task.isSuccessful()) {
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Exception e = task.getException();
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if (e instanceof FirebaseFunctionsException) {
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FirebaseFunctionsException ffe = (FirebaseFunctionsException) e;
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FirebaseFunctionsException.Code code = ffe.getCode();
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Object details = ffe.getDetails();
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}
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}
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}
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});
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// [END call_add_message]
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}
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}

‎functions/app/src/main/java/devrel/firebase/google/com/functions/kotlin/MainActivity.kt‎

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Original file line numberDiff line numberDiff line change
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package devrel.firebase.google.com.functions.kotlin
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import android.os.Bundle
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import androidx.appcompat.app.AppCompatActivity
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import com.google.android.gms.tasks.Task
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import com.google.firebase.functions.FirebaseFunctions
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import com.google.firebase.functions.FirebaseFunctionsException
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import com.google.firebase.functions.ktx.functions
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import com.google.firebase.ktx.Firebase
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class MainActivity : AppCompatActivity() {
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// [START define_functions_instance]
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private lateinit var functions: FirebaseFunctions
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// [END define_functions_instance]
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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// [START initialize_functions_instance]
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functions = Firebase.functions
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// [END initialize_functions_instance]
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}
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fun emulatorSettings() {
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// [START functions_emulator_connect]
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// 10.0.2.2 is the special IP address to connect to the 'localhost' of
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functions.useEmulator("10.0.2.2", 5001)
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// [END functions_emulator_connect]
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}
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// [START function_add_numbers]
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private fun addNumbers(a: Int, b: Int): Task<Int> {
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// Create the arguments to the callable function, which are two integers
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val data = hashMapOf(
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"firstNumber" to a,
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"secondNumber" to b
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)
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// Call the function and extract the operation from the result
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return functions
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.getHttpsCallable("addNumbers")
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.call(data)
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.continueWith { task ->
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// This continuation runs on either success or failure, but if the task
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// has failed then task.result will throw an Exception which will be
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// propagated down.
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val result = task.result?.data as Map<String, Any>
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result["operationResult"] as Int
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}
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}
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// [END function_add_numbers]
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// [START function_add_message]
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private fun addMessage(text: String): Task<String> {
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// Create the arguments to the callable function.
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val data = hashMapOf(
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"text" to text,
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"push" to true
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)
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return functions
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.getHttpsCallable("addMessage")
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.call(data)
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.continueWith { task ->
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// This continuation runs on either success or failure, but if the task
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// has failed then result will throw an Exception which will be
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// propagated down.
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val result = task.result?.data as String
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result
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}
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}
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// [END function_add_message]
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private fun callAddNumbers(firstNumber: Int, secondNumber: Int) {
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// [START call_add_numbers]
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addNumbers(firstNumber, secondNumber)
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.addOnCompleteListener { task ->
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if (!task.isSuccessful) {
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val e = task.exception
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if (e is FirebaseFunctionsException) {
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// Function error code, will be INTERNAL if the failure
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// was not handled properly in the function call.
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val code = e.code
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// Arbitrary error details passed back from the function,
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// usually a Map<String, Any>.
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val details = e.details
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}
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}
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}
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// [END call_add_numbers]
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}
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private fun callAddMessage(inputMessage: String){
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// [START call_add_message]
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addMessage(inputMessage)
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.addOnCompleteListener { task ->
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if (!task.isSuccessful) {
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val e = task.exception
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if (e is FirebaseFunctionsException) {
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val code = e.code
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val details = e.details
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}
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}
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}
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// [END call_add_message]
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}
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}

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