java - 启动时启动 Kivy 服务 (Android)

Question

我正在尝试在启动时启动我的 kivy 应用程序的服务。

我确信我的服务没问题，因为它在我启动我的应用程序时有效。但是在启动时我遇到了问题。

我读过 this article并尝试做到:

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);
    }
}

它工作但启动应用程序而不是服务。所以我研究了 StackOverflow 上的一些问题并为此更改了我的代码:

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);
    }
}

... 出现错误:

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

能否请您解释一下出了什么问题以及我应该怎么做才能启动该服务？谢谢!

已更新

应@Juggernaut 的要求，我添加了我的服务代码:

from time import sleep

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

它在我运行应用程序时有效，因为应用程序调用了服务:

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)

已更新(AndroidManifest)

这是我的 AndroidManifest.xml 中的一些字符串。

1. 我有 RECEIVE_BOOT_COMPLETED 权限:

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

2. 我有接收器:

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

3. 我已经注册了服务:

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

根据@mariachi 的建议，我尝试更改 android:enabled="true" to android:enabled="false"在接收器中添加 android:exported="false"到服务。在这种情况下，当设备启动时什么也没有发生:没有错误，没有服务。

Answer 1

我的天哪!我通过解决 my another issue with kivy service 找到了解决方案.只需添加一些附加功能就足够了。这是工作代码:

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);
    }
}