Starting Kivy service on bootup (Android)

Question

I'm trying to start my kivy app's service on bootup.

I'm sure that my service is ok because it works when I start my app. But on bootup I have a problem.

I've read this article and tried to make it:

package net.saband.myapp;

import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.Context;
import org.kivy.android.PythonActivity;

public class MyBroadcastReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        Intent ix = new Intent(context, PythonActivity.class);
        ix.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(ix);
    }
}

It works but starts the app but not the service. So I've studied some questions on StackOverflow and changed my code for this:

package net.saband.myapp;

import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.Context;
import net.saband.myapp.ServiceMyservice;

public class MyBroadcastReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        Intent ix = new Intent(context, ServiceMyservice.class);
        ix.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startService(ix);
    }
}

... and got an error:

10-21 19:16:44.784  1513  1569 I ActivityManager: Start proc 6334:net.saband.myapp:service_myservice/u0a116 for service net.saband.myapp/.ServiceMyservice
10-21 19:16:44.786  6334  6334 I art     : Late-enabling -Xcheck:jni
10-21 19:16:44.885  6334  6334 D AndroidRuntime: Shutting down VM
10-21 19:16:44.888  6334  6334 E AndroidRuntime: FATAL EXCEPTION: main
10-21 19:16:44.888  6334  6334 E AndroidRuntime: Process: net.saband.myapp:service_myservice, PID: 6334
10-21 19:16:44.888  6334  6334 E AndroidRuntime: Theme: themes:{}
10-21 19:16:44.888  6334  6334 E AndroidRuntime: java.lang.RuntimeException: Unable to start service net.saband.myapp.ServiceMyservice@8c96929 with Intent { cmp=net.saband.myapp/.ServiceMyservice }: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.os.Bundle.getString(java.lang.String)' on a null object reference

Can you please explain me what's wrong and what should I do to start the service? Thanks!

UPDATED

By request of @Juggernaut I add my service code:

from time import sleep

if __name__ == '__main__':
    while True:
        print "myapp service"
        sleep(5)

It works when I run app because app calls the service:

def __start_service(self):
    if platform == 'android':
        service = autoclass('net.saband.myapp.ServiceMyservice')
        mActivity = autoclass('org.kivy.android.PythonActivity').mActivity
        argument = ''
        service.start(mActivity, argument)

UPDATED (AndroidManifest)

Here is some strings from my AndroidManifest.xml.

1. I have the RECEIVE_BOOT_COMPLETED permission:

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

2. I have the receiver:

   <receiver android:name=".MyBroadcastReceiver" android:enabled="true"> <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED"/> </intent-filter> </receiver>

3. I have the service registered:

   <service android:name="net.saband.myapp.ServiceMyservice" android:process=":service_myservice" />

By advice of @mariachi I've tried to change android:enabled="true" to android:enabled="false" in the receiver and add android:exported="false" to the service. In this case when the device starts happens nothing: no errors, no service.

Answer 1

It seems that Service or Activity that you try to start is not initialized. You didn't paste your AndroidManifest, so I'll write what it's supposed to have.

The first thing is that you should have permission added to run on boot:

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

The second thing is that you should define your receiver in Manifest:

    <receiver android:name=".MyBroadcastReceiver"
              android:enabled="false">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>

The third thing is that you should define your service or activity you try to start, eg:

    <activity android:name=".PythonActivity" />
    <service android:name=".ServiceMyservice" android:exported="false"/>

Answer 2

OMG! I've found the solution by solving my another issue with kivy service . It's enough just add some extras. Here is work code:

package net.saband.myapp;

import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.Context;
import net.saband.myapp.ServiceMyservice;

public class MyBroadcastReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        String package_root = context.getFilesDir().getAbsolutePath();
        String app_root =  package_root + "/app";
        Intent ix = new Intent(context, ServiceMyservice.class);
        ix.putExtra("androidPrivate", package_root);
        ix.putExtra("androidArgument", app_root);
        ix.putExtra("serviceEntrypoint", "./service/main.py");
        ix.putExtra("pythonName", "myservice");
        ix.putExtra("pythonHome", app_root);
        ix.putExtra("pythonPath", package_root);
        ix.putExtra("pythonServiceArgument", app_root+":"+app_root+"/lib");
        ix.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startService(ix);
    }
}