Develop Reference

How to make my virtual assistant app run always in the background? (android studio)

I created a virtual assistant app in Android Studio and it working fine until I exit the app window and the process stops. I want to make the app run in the background always so when it get's the wake word anytime it will respond. I tried using a Service but I couldn't make it work.
Can you help me please?
This is my code:
package com.eylon.jarvis;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.SpeechRecognizer;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import java.util.ArrayList;
import java.util.Locale;
import ai.picovoice.porcupine.Porcupine;
import ai.picovoice.porcupine.PorcupineActivationException;
import ai.picovoice.porcupine.PorcupineActivationLimitException;
import ai.picovoice.porcupine.PorcupineActivationRefusedException;
import ai.picovoice.porcupine.PorcupineActivationThrottledException;
import ai.picovoice.porcupine.PorcupineException;
import ai.picovoice.porcupine.PorcupineInvalidArgumentException;
import ai.picovoice.porcupine.PorcupineManager;
import ai.picovoice.porcupine.PorcupineManagerCallback;
enum AppState {
STOPPED,
WAKEWORD,
STT
}
public class MainActivity extends AppCompatActivity {
private static final String ACCESS_KEY = "Oc8ZOSkVtJHWKhVW3iGMedHDSCSXn6P4vQtrQBl8hNLXwLmxLhs2AA==";
private PorcupineManager porcupineManager = null;
TextView textView;
ToggleButton button;
private SpeechRecognizer speechRecognizer;
private Intent speechRecognizerIntent;
private AppState currentState;
private void displayError(String message) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
}
private final PorcupineManagerCallback porcupineManagerCallback = new PorcupineManagerCallback() {
#Override
public void invoke(int keywordIndex) {
runOnUiThread(() -> {
textView.setText("");
try {
// need to stop porcupine manager before speechRecognizer can start listening.
porcupineManager.stop();
} catch (PorcupineException e) {
displayError("Failed to stop Porcupine.");
return;
}
speechRecognizer.startListening(speechRecognizerIntent);
currentState = AppState.STT;
});
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = findViewById(R.id.text1);
button = findViewById(R.id.button1);
if (!SpeechRecognizer.isRecognitionAvailable(this)) {
displayError("Speech Recognition not available.");
}
// Creating the Intent of the Google speech to text and adding extra variables.
speechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE, "en-US");
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en-US");
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_ONLY_RETURN_LANGUAGE_PREFERENCE, "en-US");
speechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Start speaking");
try {
porcupineManager = new PorcupineManager.Builder()
.setAccessKey(ACCESS_KEY)
.setKeyword(Porcupine.BuiltInKeyword.JARVIS)
.setSensitivity(0.7f)
.build(getApplicationContext(), porcupineManagerCallback);
} catch (PorcupineInvalidArgumentException e) {
onPorcupineInitError(
String.format("%s\nEnsure your accessKey '%s' is a valid access key.", e.getMessage(), ACCESS_KEY)
);
} catch (PorcupineActivationException e) {
onPorcupineInitError("AccessKey activation error");
} catch (PorcupineActivationLimitException e) {
onPorcupineInitError("AccessKey reached its device limit");
} catch (PorcupineActivationRefusedException e) {
onPorcupineInitError("AccessKey refused");
} catch (PorcupineActivationThrottledException e) {
onPorcupineInitError("AccessKey has been throttled");
} catch (PorcupineException e) {
onPorcupineInitError("Failed to initialize Porcupine " + e.getMessage());
}
currentState = AppState.STOPPED;
}
private void onPorcupineInitError(final String errorMessage) {
runOnUiThread(() -> {
TextView errorText = findViewById(R.id.text1);
errorText.setText(errorMessage);
ToggleButton recordButton = findViewById(R.id.button1);
recordButton.setChecked(false);
recordButton.setEnabled(false);
});
}
#Override
protected void onStop() {
if (button.isChecked()) {
stopService();
button.toggle();
speechRecognizer.destroy();
}
super.onStop();
}
private boolean hasRecordPermission() {
return ActivityCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO)
== PackageManager.PERMISSION_GRANTED;
}
private void requestRecordPermission() {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO},
0);
}
#SuppressLint("SetTextI18n")
private void playback(int milliSeconds) {
speechRecognizer.stopListening();
currentState = AppState.WAKEWORD;
new Handler(Looper.getMainLooper()).postDelayed(() -> {
if (currentState == AppState.WAKEWORD) {
porcupineManager.start();
textView.setText("Listening for " + Porcupine.BuiltInKeyword.JARVIS + " ...");
}
}, milliSeconds);
}
private void stopService() {
if (porcupineManager != null) {
try {
porcupineManager.stop();
} catch (PorcupineException e) {
displayError("Failed to stop porcupine.");
}
}
textView.setText("");
speechRecognizer.stopListening();
speechRecognizer.destroy();
currentState = AppState.STOPPED;
}
#Override
public void onRequestPermissionsResult(int requestCode,
#NonNull String[] permissions,
#NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length == 0 || grantResults[0] == PackageManager.PERMISSION_DENIED) {
displayError("Microphone permission is required for this app!");
requestRecordPermission();
} else {
speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
speechRecognizer.setRecognitionListener(new SpeechListener());
playback(0);
}
}
public void process(View view) {
if (button.isChecked()) {
if (hasRecordPermission()) {
speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
speechRecognizer.setRecognitionListener(new SpeechListener());
playback(0);
} else {
requestRecordPermission();
}
} else {
stopService();
}
}
private class SpeechListener implements RecognitionListener {
#Override
public void onReadyForSpeech(Bundle params) {
}
#Override
public void onBeginningOfSpeech() {
}
#Override
public void onRmsChanged(float rmsdB) {
}
#Override
public void onBufferReceived(byte[] buffer) {
}
#Override
public void onEndOfSpeech() {
}
#SuppressLint("SwitchIntDef")
#Override
public void onError(int error) {
switch (error) {
case SpeechRecognizer.ERROR_AUDIO:
displayError("Error recording audio.");
break;
case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS:
displayError("Insufficient permissions.");
break;
case SpeechRecognizer.ERROR_NETWORK_TIMEOUT:
case SpeechRecognizer.ERROR_NETWORK:
displayError("Network Error.");
break;
case SpeechRecognizer.ERROR_NO_MATCH:
if (button.isChecked()) {
displayError("No recognition result matched.");
playback(1000);
}
case SpeechRecognizer.ERROR_CLIENT:
return;
case SpeechRecognizer.ERROR_RECOGNIZER_BUSY:
displayError("Recognition service is busy.");
break;
case SpeechRecognizer.ERROR_SERVER:
displayError("Server Error.");
break;
case SpeechRecognizer.ERROR_SPEECH_TIMEOUT:
displayError("No speech input.");
break;
default:
displayError("Something wrong occurred.");
}
stopService();
button.toggle();
}
#Override
public void onResults(Bundle results) {
ArrayList<String> data = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
audioResponseSelecting(data.get(0).toLowerCase(Locale.ROOT));
textView.setText(data.get(0));
playback(3000);
}
#Override
public void onPartialResults(Bundle partialResults) {
ArrayList<String> data = partialResults.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
audioResponseSelecting(data.get(0).toLowerCase(Locale.ROOT));
textView.setText(data.get(0));
}
#Override
public void onEvent(int eventType, Bundle params) {
}
}
// The response selecting function.
public void audioResponseSelecting(String transcript)
{
if (transcript.equals(("Good morning").toLowerCase(Locale.ROOT)))
{
executeResponse(R.raw.good_morning);
}
else if (transcript.equals(("Who is your creator").toLowerCase(Locale.ROOT)))
{
executeResponse(R.raw.creator);
}
}
// The audio file response execution function.
public void executeResponse(final int audio)
{
MediaPlayer response = MediaPlayer.create(MainActivity.this, audio);
response.start();
}
}

By design, all SpeechRecognizer's methods "must be invoked only from the main application thread."
Main application thread is also referred to as "UI thread".
This means that SpeechRecognizer cannot run in a service.

App keeps crashing cause of broadcastreceiver

Can anyone help me debug which part of my code is the reason why it keeps crashing? I've been trying to figure out which part is wrong, I got the code online and applied it on my own but I had troubles on this part where it keeps saying app is
I created different functions to figure out which part is wrong, thank you.
in my logcat it says:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.intern()' on a null object reference
Mainactivty
import androidx.appcompat.app.AppCompatActivity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private TextView tv_time;
private TextView tv_amount;
private ImageView iv_status_01;
private ImageView iv_status_02;
private ImageView iv_status_03;
private ImageView iv_status_04;
private ImageView iv_status_05;
private ImageView iv_status_06;
private ImageView iv_complete;
private Intent serviceInent = null;
public static String status1;
public static String status2;
public static String status3;
public static String status4;
public static String status5;
public static String status6;
private IntentFilter intentFilter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intentFilter = new IntentFilter();
intentFilter.addAction(status1);
intentFilter.addAction(status2);
intentFilter.addAction(status3);
intentFilter.addAction(status4);
intentFilter.addAction(status5);
intentFilter.addAction(status6);
init();
}
private void init(){
tv_amount = findViewById(R.id.tv_amount);
tv_time = findViewById(R.id.tv_time);
Date date = new Date();
Locale philippineLocale = new Locale.Builder().setLanguage("en").setRegion("PH").build();
tv_time.setText(getDate(date, philippineLocale));
tv_amount.setText("Total Amount :\n500.00");
serviceInent = new Intent(this, DeliveryService.class);
startService(new Intent(this, DeliveryService.class));
}
private String getDate(Date date, Locale locale) {
DateFormat formatter = new SimpleDateFormat("EEEE \nMMMM dd, yyyy", locale);
return formatter.format(date);
}
#Override
public void onResume() {
super.onResume();
registerReceiver(mReceiver, intentFilter);
}
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(status1)) {
iv_status_01.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status2)) {
iv_status_02.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status3)) {
iv_status_03.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status4)) {
iv_status_04.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status5)) {
iv_status_05.setImageResource(R.drawable.box_check);
}
else if (intent.getAction().equals(status5)) {
iv_status_06.setImageResource(R.drawable.box_check);
}
}
};
#Override
protected void onPause() {
unregisterReceiver(mReceiver);
super.onPause();
}
}
Deliveryservice:
import android.annotation.TargetApi;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;
import android.util.Log;
public class DeliveryService extends Service {
private String LOG_TAG = null;
#Override
public void onCreate() {
super.onCreate();
LOG_TAG = this.getClass().getSimpleName();
Log.i(LOG_TAG, "In onCreate");
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i(LOG_TAG, "In onStartCommand");
new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Intent broadcastIntent = new Intent();
broadcastIntent.setAction(MainActivity.status1);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status2);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status3);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status4);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status5);
sendBroadcast(broadcastIntent);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
broadcastIntent.setAction(MainActivity.status6);
sendBroadcast(broadcastIntent);
}
}).start();
return START_REDELIVER_INTENT;
}
#Override
public IBinder onBind(Intent intent) {
Log.i(LOG_TAG, "In onBind");
return null;
}
#TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Log.i(LOG_TAG, "In onTaskRemoved");
}
public void onDestroy() {
super.onDestroy();
Log.i(LOG_TAG, "In onDestroy");
}
}
thank you.

You should initialize strings used as Action (like status1); otherwise, NullProinterException will be thrown.

Sharing one service between two activities without destroying it?

I'm working on an application to communicate with a raspberry pi. The app communicates with the server via a socket connection.
I'm currently able to building up the communication and holding it in a service. But my goal is to change from activity A to activity B. The problem is, that my application destroys the service when im switching the activities. Is there a way to avoid this?
Activity A starts the service and when im starting Activity B i bind it to the activity to call the methods in the service class. But it isn't the same instance.
How could i solve this?
Code
ConnectActivity
package com.example.domen.twitchdronev3;
import android.content.Intent;
import android.os.Parcelable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class ConnectActivity extends AppCompatActivity {
private int port = 3000;
private String ip = "localhost";
private Intent serviceIntent, activityIntent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_connect);
Toast.makeText(getApplicationContext(), "Starte App...", Toast.LENGTH_LONG).show();
activityIntent = new Intent(this, ControllActivity.class);
serviceIntent = new Intent(this, ClientService.class);
serviceIntent.putExtra("ip", ip);
serviceIntent.putExtra("port", port);
Button btnActivity = (Button) findViewById(R.id.changeActivity);
btnActivity.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startService(serviceIntent);
activityIntent.putExtra("Intent", (Parcelable) serviceIntent);
startActivity(activityIntent);
}
});
}
// destroys the Activity
#Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(getApplicationContext(), "Destroy (ConnectActivity)", Toast.LENGTH_LONG).show();
}
// Activity stopping
#Override
protected void onStop() {
super.onStop();
}
}
ControllActivity
package com.example.domen.twitchdronev3;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class ControllActivity extends AppCompatActivity {
public static final String TAG = "ControllActivity";
private ClientService clientservice;
private Intent serviceIntent;
private boolean isBound;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_controll);
Bundle extras = getIntent().getExtras();
serviceIntent = extras.getParcelable("Intent");
Button btnDisconnect = (Button) findViewById(R.id.btnDisconnect);
btnDisconnect.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view) {
doBindToService();
}
});
}
// destroys the Activity
#Override
public void onDestroy(){
super.onDestroy();
Toast.makeText(getApplicationContext(), "Destroy (ControllActivity)", Toast.LENGTH_LONG).show();
doUnbindToService();
stopService(serviceIntent);
}
// Functions to BIND and UNBIND the SERVICE
// bind to Service
public void doBindToService(){
if(!isBound) {
Toast.makeText(this, "(doBindToService) Binding...", Toast.LENGTH_LONG).show();
isBound = bindService(serviceIntent, myConnection, Context.BIND_AUTO_CREATE);
}
}
// Unbind to Service
public void doUnbindToService(){
Toast.makeText(this, "(doUnbindToService) Unbinding...", Toast.LENGTH_LONG).show();
unbindService(myConnection);
isBound = false;
}
private ServiceConnection myConnection = new ServiceConnection(){
public static final String TAG = "ConnectActivity";
#Override
public void onServiceConnected(ComponentName className, IBinder service){
Log.i(TAG, "BOUND SERVICE CONNECTED");
clientservice = ((ClientService.ClientBinder) service).getService();
isBound = true;
}
#Override
public void onServiceDisconnected(ComponentName name){
Log.i(TAG, "BOUND SERVICE DISCONNECTED");
clientservice = null;
isBound = false;
}
};
}
ClientService
package com.example.domen.twitchdronev3;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
/**
* Created by ViTrex on 12.02.2018.
*/
public class ClientService extends Service {
private static final String TAG = "ClientService";
private final IBinder mBinder = new ClientBinder();
private PrintWriter out;
private Socket socket;
private String ip = "";
private int port = 0;
private Thread backgroundThread;
// the class used for the client binder
public class ClientBinder extends Binder {
ClientService getService() {
// returns the instance of ClientService
// so the client can access the public methods
return ClientService.this;
}
}
//SETTER
public void setIP(String ip) {
this.ip = ip;
}
public void setPort(int port) {
this.port = port;
}
//GETTER
public String getIP() {
return this.ip;
}
public int getPort() {
return this.port;
}
#Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "onCreate...");
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "onStartCommand", Toast.LENGTH_LONG).show();
if(intent != null){
setIP(intent.getStringExtra("ip"));
setPort(intent.getIntExtra("port", 3000));
}
return START_NOT_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
Log.i(TAG, "onBind called...");
Toast.makeText(this, getIP() + " " + getPort(), Toast.LENGTH_LONG).show();
backgroundThread = new Thread(new Runnable() {
#Override
public void run() {
buildConnection();
}
});
backgroundThread.start();
return mBinder;
}
private void buildConnection() {
Log.i(TAG, "Try to build up a connection ...");
synchronized (this) {
try {
this.socket = new Socket(getIP(), getPort());
this.out = new PrintWriter(this.socket.getOutputStream(), true);
Log.i(TAG, "Connected");
} catch (IOException ioe) {
Log.i(TAG, ioe.getMessage());
this.socket = null;
} catch (Exception e) {
e.printStackTrace();
}
}
}
#Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "Close Service");
Thread dummy = backgroundThread;
backgroundThread = null;
if (dummy != null)
dummy.interrupt();
if (this.socket != null) {
try {
this.out.close();
this.socket.close();
Log.i(TAG, "Close Socket");
} catch (IOException ioe) {
Log.i(TAG, "ERROR: Close Socket");
}
}
}
}

You say:
Activity A starts the service and when I'm starting Activity B I bind
it to the activity to call the methods in the service class. But it
isn't the same instance.
How do you know it is not the same instance (presumably you mean of the service instance)?
I think your code is o.k. to run on older devices (It runs o.k. on my device. pre-API26, I think permissions changed after then so maybe more code needed. See NOTE at the end of this answer).
Don't you want START_STICKY ?
I would add this code (read the Intent data that was setup by Activity A) to your ClientService.java:
#Override
public int onStartCommand(Intent intent, int flags, int startId)
{
String a_ip = intent.getStringExtra("ip");
int a_port = intent.getIntExtra("port",-1);
Log.i(TAG, "onStartCommand called...with " + "ip:" + a_ip + "and port:"+ a_port);
setIP(a_ip);
setPort(a_port);
return START_NOT_STICKY;//don't you want START_STICKY ?
}
Note: If your app targets API level 26 or higher, the system imposes
restrictions on using or creating background services unless the app
itself is in the foreground. If an app needs to create a foreground
service, the app should call StartForegroundService(). That method
creates a background service, but the method signals to the system
that the service will promote itself to the foreground. Once the
service has been created, the service must call its startForeground()
method within five seconds. From here

long life service and broadcastreceiver

i write application that send outgoing call number from android to server.
here is my code:
service.java
package info;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
public class ServiceToSendData extends Service {
// private static final String TAG = "HelloService";
public static boolean isRunning = false;
#Override
public IBinder onBind(Intent arg0) {
return null;
}
#Override
public void onCreate() {
isRunning = true;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
new Thread(new Runnable() {
#Override
public void run() {
}
}).start();
return Service.START_STICKY;
}
#Override
public void onDestroy() {
isRunning = false;
}
}
outgoingCall Reciver
import org.json.JSONException;
import org.json.JSONObject;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.StrictMode;
public class OutgoingCallReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
// Log.i("Outgoing Call", "call to: " + phoneNumber);
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("type", "outgoingCall");
}
catch (JSONException e) {
e.printStackTrace();
}
try {
jsonObject.put("number", phoneNumber);
}
catch (JSONException e) {
e.printStackTrace();
}
try {
jsonObject.put("content", "0");
}
catch (JSONException e) {
e.printStackTrace();
}
if (phoneNumber != null) {
sendDataToServer sdts = new sendDataToServer();
sdts.run(jsonObject, context);
}
Intent startServiceIntent = new Intent(context, ServiceToSendData.class);
context.startService(startServiceIntent);
}
}
explain problem
1-this code work good if app was open or app is minimized, but when i close the app code not work , and nullpointerexception problem ?
2-any way to access database with context from service?
thanks in advance.

Pass callback method result with in a non-activity class to android activity class?

I need to create twitter fabric re-usable component.my first step to allow login with twitter by simply calling method from a class.
Code
CLASS
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
import com.twitter.sdk.android.Twitter;
import com.twitter.sdk.android.core.Callback;
import com.twitter.sdk.android.core.Result;
import com.twitter.sdk.android.core.TwitterAuthConfig;
import com.twitter.sdk.android.core.TwitterAuthToken;
import com.twitter.sdk.android.core.TwitterException;
import com.twitter.sdk.android.core.TwitterSession;
import com.twitter.sdk.android.core.identity.TwitterAuthClient;
import com.twitter.sdk.android.core.models.Tweet;
import com.twitter.sdk.android.core.services.StatusesService;
import io.fabric.sdk.android.Fabric;
public class TwitterAuth {
private String CONSUMER_KEY;
private String CONSUMER_SECRET;
private Context context;
private TwitterAuthClient client;
private StatusesService service;
public TwitterAuth(Context context, String CONSUMER_KEY, String CONSUMER_SECRET) {
this.CONSUMER_KEY = CONSUMER_KEY;
this.CONSUMER_SECRET = CONSUMER_SECRET;
this.context = context;
configureKey();
}
public void configureKey() {
TwitterAuthConfig authConfig = new TwitterAuthConfig(CONSUMER_KEY, CONSUMER_SECRET);
Fabric.with(context, new Twitter(authConfig));
}
public void doLogin() {
client = new TwitterAuthClient();
client.authorize((Activity) context, new Callback<TwitterSession>() {
#Override
public void success(Result<TwitterSession> twitterSessionResult) {
final TwitterSession session = Twitter.getSessionManager().getActiveSession();
TwitterAuthToken authToken = session.getAuthToken();
String token = authToken.token;
String secret = authToken.secret;
String userName = session.getUserName();
Toast.makeText(context, "TWITTER EASY LIB TEST :: Done Login With \n Username :" + userName + " \n Token :" + token + "\n Secret :" + secret, Toast.LENGTH_LONG).show();
//Toast.makeText(MainActivity.this, "success", Toast.LENGTH_SHORT).show();
}
#Override
public void failure(TwitterException e) {
Toast.makeText(context, "TWITTER EASY LIB TEST :: failure", Toast.LENGTH_SHORT).show();
}
});
}
public void doLogout() {
Twitter.getSessionManager().clearActiveSession();
}
public void publishTweet(String tweet) {
service = Twitter.getInstance().getApiClient().getStatusesService();
service.update(tweet, null, null, null, null, null, null, null, new Callback<Tweet>() {
#Override
public void success(Result<Tweet> tweetResult) {
Toast.makeText(context, "Tweet Updated !",
Toast.LENGTH_SHORT).show();
}
#Override
public void failure(TwitterException e) {
Toast.makeText(context, "Error occured !",
Toast.LENGTH_SHORT).show();
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
client.onActivityResult(requestCode, resultCode, data);
}
}
Activity
package codelynks.twitter.twitterintegration;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.Button;
import com.easytweet.TwitterAuth;
public class CheckLib extends ActionBarActivity {
private Button cus;
private TwitterAuth auth;
private String CONSUMER_KEY = "", CONSUMER_SECRET = "";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
auth = new TwitterAuth(CheckLib.this, CONSUMER_KEY, CONSUMER_SECRET);
setContentView(R.layout.activity_main);
cus = (Button) findViewById(R.id.cusbutton);
cus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
auth.doLogin();
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
auth.onActivityResult(requestCode, resultCode, data);
}
#Override
protected void onResume() {
super.onResume();
}
#Override
protected void onDestroy() {
super.onDestroy();
}
}
Here i will get the result on callback method
public void success(Result<TwitterSession> twitterSessionResult) {}
**or**
public void failure(TwitterException e) {}
How can i pass this result(SUCCESS/FAILURE) to activity CheckLib for doing further actions.?
any help would be appreciated :)

you can set listener for success or failure in your TwitterAuth.class and then set this listener in your activity (CheckLib.class) to notify you when success or failure, like this:
public class TwitterAuth {
private TwitterLoginListener listener;
public void setListener( TwitterLoginListener listener){
this.listener = listener;
}
Interfase TwitterLoginListener{
public void success(Result<TwitterSession> twitterSessionResult);
public void failure(TwitterException e);
}
.
.
.
in success and failure method you need to fill listener:
in success method (in TwitterAuth.class):
if(listener != null){
listener.success(twitterSessionResult);
}
in failure method (in TwitterAuth.class):
if(listener != null){
listener.failure(e);
}
then in your activity set listener:
.
.
.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
auth = new TwitterAuth(CheckLib.this, CONSUMER_KEY, CONSUMER_SECRET);
auth.setListener(new TwitterLoginListener{
#Override
public void success(Result<TwitterSession> twitterSessionResult){
//login success
}
#Override
public void failure(TwitterException e){
//login failed
}
});
.
.
.

If it is a primitive type, like a boolean or a String (ok, this one is not primitive, but still), you can pass it as an Extra in an Intent which you send to the activity.
If it is a more complex object or you do not have Context access in your class, try greenrobot EventBus, a pretty cool library created exactly for such situations.

You can use interface and implement the interface method from your dologin method
check my sample
public interface sampleInterface {
// you can define any parameter as per your requirement
public void yourMethod(boolean value);
}
public void doLogin(sampleInterface si) {
public void publishTweet(String tweet) {
sampleInterface sampleIn;
service = Twitter.getInstance().getApiClient().getStatusesService();
service.update(tweet, null, null, null, null, null, null, null, new Callback<Tweet>() {
#Override
public void success(Result<Tweet> tweetResult) {
Toast.makeText(context, "Tweet Updated !",
Toast.LENGTH_SHORT).show();
si.yourMethod(true);
}
#Override
public void failure(TwitterException e) {
Toast.makeText(context, "Error occured !",
Toast.LENGTH_SHORT).show();
si.yourMethod(false);
}
});
}
}
inside your activity class
public void onClick(View v) {
auth.doLogin(new sampleInterface() {
#Override
public void yourMethod(boolean value) {
//GET your result
}
});
}