Question

I want to display an alert when a sms is received, so my idea is to start a new activity that launch the alertdialog.

My service starts with no problem, and starts receiver as well..

I can receive sms and display toast alerts fine.. but i’d like to show a custom alertdialog instead.

This is the activity that starts my service (ServiceExampleActivity ):

public class ServiceExampleActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button btnStartService = (Button) findViewById(R.id.btnStart);
        Button btnStopService = (Button) findViewById(R.id.btnStop);

        btnStartService.setOnClickListener(new OnClickListener() {

            public void onClick(View arg0) {
                StartMyService();
            }
        });

        btnStopService.setOnClickListener(new OnClickListener() {

            public void onClick(View arg0) {
                StopMyService();
            }
        });          

    }

    private void StartMyService() {
        Intent myServiceIntent = new Intent(this, ServiceTest.class);
        startService(myServiceIntent);
    }

    private void StopMyService() {
        Intent myServiceIntent = new Intent(this, ServiceTest.class);
        stopService(myServiceIntent);
    }        
}

This is my Service (ServiceTest):

public class ServiceTest extends Service {

    private static final String ACTION = "android.provider.Telephony.SMS_RECEIVED";
    private BroadcastReceiver myBroadcastReceiver = null;

    @Override
    public void onCreate() {
        super.onCreate();

        final IntentFilter theFilter = new IntentFilter();
        theFilter.addAction(ACTION);

        this.myBroadcastReceiver = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {

                StartDialogActivity(context, intent);

            }
        };

        this.registerReceiver(myBroadcastReceiver, theFilter);
    }

    @Override
    public IBinder onBind(Intent arg) {
        return null;
    }

    @Override
    public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);

        Log.d("ServiceTest", "Started");
        Toast.makeText(this, "Service started...", 3000).show();

    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        unregisterReceiver(myBroadcastReceiver);
        Toast.makeText(this, "Service destroyed...", 3000).show();
    }

    private void StartDialogActivity(Context context, Intent intent) {
        Intent dlgIntent = new Intent(context, DialogActivity.class);               
        dlgIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);      
        context.startActivity(dlgIntent);   
    }
}

And this is the activity i want to launch to display the alertdialog normally..

public class DialogActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog);       

    }
}

When it tries to start the activity, the app crashes..
Can you tell me were is the error..??

Answer 1

Like this, you want start activity from service

Intent dlgIntent = new Intent(context, DialogActivity.class);
dlgIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplication().startActivity(dlgIntent );