Ytukyg

I'm doing demo which checks call state and sends FCM notification in some case, I mainly test on my Xiaomi Redmi 5 Plus(API 27) and it just works fine, but when i tried to test on other devices Samsung S6 Edge(API 24), Samsung A5(API 21) and emulators(API 26 and lower) it just unwilling to run. I have a problem with registration token, other devices gets null. I aslo tried onNewToken(), but that is not the case. I don't know why it crashes on other devices except mine?

E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.aliaskarurakov.android.democall, PID: 19586

    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aliaskarurakov.android.democall/com.aliaskarurakov.android.democall.MainActivity}: java.lang.NullPointerException: value == null

        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2808)

        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2873)

        at android.app.ActivityThread.access$900(ActivityThread.java:181)

        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482)

        at android.os.Handler.dispatchMessage(Handler.java:102)

        at android.os.Looper.loop(Looper.java:145)

        at android.app.ActivityThread.main(ActivityThread.java:6145)

        at java.lang.reflect.Method.invoke(Native Method)

        at java.lang.reflect.Method.invoke(Method.java:372)

        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

     Caused by: java.lang.NullPointerException: value == null

        at okhttp3.FormBody$Builder.add(FormBody.java:120)

        at com.aliaskarurakov.android.democall.MainActivity.registerToken(MainActivity.java:134)

        at com.aliaskarurakov.android.democall.MainActivity.onCreate(MainActivity.java:48)

        at android.app.Activity.performCreate(Activity.java:6374)

        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)

        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2752)

        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2873) 

        at android.app.ActivityThread.access$900(ActivityThread.java:181) 

        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482) 

        at android.os.Handler.dispatchMessage(Handler.java:102) 

        at android.os.Looper.loop(Looper.java:145) 

        at android.app.ActivityThread.main(ActivityThread.java:6145) 

        at java.lang.reflect.Method.invoke(Native Method) 

        at java.lang.reflect.Method.invoke(Method.java:372) 

        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399) 

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194) 

I/Process: Sending signal. PID: 19586 SIG: 9

Application terminated.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.aliaskarurakov.android.democall">

    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <uses-permission android:name="android.permission.READ_PHONE_STATE" />

    <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">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service

            android:name=".MyFirebaseMessagingService">

            <intent-filter>

                <action android:name="com.google.firebase.MESSAGING_EVENT"/>

            </intent-filter>

        </service>

    </application>

</manifest>

build.gradle(app)

apply plugin: 'com.android.application'



android {

    compileSdkVersion 28

    defaultConfig {

        applicationId "com.aliaskarurakov.android.democall"

        minSdkVersion 19

        targetSdkVersion 28

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}



dependencies {

    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:28.0.0'

    implementation 'com.android.support:design:28.0.0'

    implementation 'com.android.support:support-v4:28.0.0'

    implementation 'com.android.support:support-media-compat:28.0.0'

    implementation 'com.android.support:recyclerview-v7:28.0.0'

    implementation 'com.android.support.constraint:constraint-layout:1.1.3'

    testImplementation 'junit:junit:4.12'

    androidTestImplementation 'com.android.support.test:runner:1.0.2'

    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

    implementation 'com.google.firebase:firebase-core:16.0.5'

    implementation 'com.google.firebase:firebase-messaging:17.3.4'

    implementation 'com.squareup.okhttp3:okhttp:3.11.0'

}



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

build.gradle

buildscript {



    repositories {

        google()

        jcenter()

    }

    dependencies {

        classpath 'com.android.tools.build:gradle:3.2.1'

        classpath 'com.google.gms:google-services:4.2.0'

    }

}



allprojects {

    repositories {

        google()

        jcenter()

    }

}



task clean(type: Delete) {

    delete rootProject.buildDir

}

MainActivity.java

public class MainActivity extends AppCompatActivity {



    Button mButton;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        mButton = (Button)findViewById(R.id.send);



        final String token = FirebaseInstanceId.getInstance().getToken();

        //Toast.makeText(getApplicationContext(), token, Toast.LENGTH_SHORT).show();



        TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);



        String phoneState = String.valueOf(telephonyManager.getCallState());

        //Toast.makeText(getApplicationContext(), phoneState, Toast.LENGTH_LONG).show();



        registerToken(token, phoneState);



        PhoneStateListener callStateListener = new PhoneStateListener() {

            public void onCallStateChanged(int state, String incomingNumber) {

                if (state == TelephonyManager.CALL_STATE_RINGING) {

                    updateState(token, String.valueOf(state));



                }

                if (state == TelephonyManager.CALL_STATE_OFFHOOK) {

                    updateState(token, String.valueOf(state));

                }



                if (state == TelephonyManager.CALL_STATE_IDLE) {

                    updateState(token, String.valueOf(state));

                }

            }

        };

        telephonyManager.listen(callStateListener,PhoneStateListener.LISTEN_CALL_STATE);



        mButton.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                sendNotification();

            }

        });

    }



    private void updateState(String token, String state) {

        OkHttpClient client = new OkHttpClient();

        RequestBody body = new FormBody.Builder()

                .add("token", token)

                .add("state", state)

                .build();



        Request request = new Request.Builder()

                .url("http://update_state.php")

                .post(body)

                .build();



        client.newCall(request).enqueue(new Callback() {

            @Override

            public void onFailure(Call call, IOException e) {

                Log.d("OkHttp", call.toString());

            }



            @Override

            public void onResponse(Call call, Response response) throws IOException {

                if (response.isSuccessful()) {

                    String responseStr = response.body().string();

                    Log.d("OkHttp", responseStr);

                }

            }

        });

    }



    public void sendNotification() {

        OkHttpClient client = new OkHttpClient();

        RequestBody body = new FormBody.Builder()

                .add("send", "send")

                .build();



        Request request = new Request.Builder()

                .url("http://send_notification.php")

                .post(body)

                .build();



        client.newCall(request).enqueue(new Callback() {

            @Override

            public void onFailure(Call call, IOException e) {

                Log.d("OkHttp", call.toString());

            }



            @Override

            public void onResponse(Call call, Response response) throws IOException {

                if (response.isSuccessful()) {

                    String responseStr = response.body().string();

                    Log.d("OkHttp", responseStr);

                }

            }

        });



    }



    private static void registerToken(String token, String state) {

        OkHttpClient client = new OkHttpClient();

        RequestBody body = new FormBody.Builder()

                .add("token", token)

                .add("state", state)

                .build();



        Request request = new Request.Builder()

                .url("http://register_user.php")

                .post(body)

                .build();



        client.newCall(request).enqueue(new Callback() {

            @Override

            public void onFailure(Call call, IOException e) {

                Log.d("OkHttp", call.toString());

            }



            @Override

            public void onResponse(Call call, Response response) throws IOException {

                if (response.isSuccessful()) {

                    String responseStr = response.body().string();

                    Log.d("OkHttp", responseStr);

                }

            }

        });



    }



}

MyFirebaseMessagingService.java

public class MyFirebaseMessagingService extends FirebaseMessagingService {



    NotificationHelper helper;



    @Override

    public void onMessageReceived(RemoteMessage remoteMessage) {





        if (Build.VERSION.SDK_INT >= 26) {

            showNotification26(remoteMessage.getData().get("message"), remoteMessage.getData().get("title"));

        } else {

            showNotification(remoteMessage.getData().get("message"), remoteMessage.getData().get("title"));

        }

    }



    private void showNotification(String message, String title) {

        Intent i = new Intent(this, MainActivity.class);

        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);



        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, i, PendingIntent.FLAG_UPDATE_CURRENT);

        Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)

                .setAutoCancel(true)

                .setSound(defaultSound)

                .setContentTitle(title)

                .setContentText(message)

                .setSmallIcon(R.mipmap.ic_launcher)

                .setContentIntent(pendingIntent);



        NotificationManager manager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        manager.notify(0, builder.build());

    }



    @RequiresApi(api = Build.VERSION_CODES.O)

    private void showNotification26(String message, String title) {

        Notification.Builder builder = null;

        helper = new NotificationHelper(this);

        builder = helper.getAndroidChannelNotification(message, title);



        if (builder != null){

            helper.getManager().notify(0, builder.build());

        }

    }



}

According to the documentation getToken() call returns:

• the master token or null if the token is not yet available

This was deprecated in favour of getInstanceId() which returns a Task<InstanceIdResult>, so you can use it on the main thread and get back the result:

FirebaseInstanceId.getInstance().getInstanceId().addOnSuccessListener(MainActivity.this, new OnSuccessListener<InstanceIdResult>() {

     @Override

     public void onSuccess(InstanceIdResult instanceIdResult) {

         String token = instanceIdResult.getToken();

         Log.d("Token", token);

     }  

});

Alternatively you can also override the onNewToken(String token) method in FirebaseMessagingService to get a token:

public class MyFirebaseMessagingService extends FirebaseMessagingService {



    @Override

    public void onNewToken(String token) {

        super.onNewToken(token);

        Log.d("Token", token);

    }

}