service_only bootstrap now works with android (7 and 8 tested) (#1725)

service_only bootstrap now works with android (7 and 8 tested)

Author: zworkb

pythonforandroid/bootstraps/common/build/src/main/java/org/kivy/android/PythonService.java

@@ -18,6 +18,10 @@
 
 import org.renpy.android.Hardware;
 
+//imports for channel definition
+import android.app.NotificationManager;
+import android.app.NotificationChannel;
+import android.graphics.Color;
 
 public class PythonService extends Service implements Runnable {
 
@@ -90,13 +94,13 @@ public int onStartCommand(Intent intent, int flags, int startId) {
     protected void doStartForeground(Bundle extras) {
         String serviceTitle = extras.getString("serviceTitle");
         String serviceDescription = extras.getString("serviceDescription");
-
         Notification notification;
         Context context = getApplicationContext();
         Intent contextIntent = new Intent(context, PythonActivity.class);
         PendingIntent pIntent = PendingIntent.getActivity(context, 0, contextIntent,
             PendingIntent.FLAG_UPDATE_CURRENT);
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
             notification = new Notification(
                 context.getApplicationInfo().icon, serviceTitle, System.currentTimeMillis());
             try {
@@ -109,7 +113,19 @@ protected void doStartForeground(Bundle extras) {
                      IllegalArgumentException | InvocationTargetException e) {
             }
         } else {
-            Notification.Builder builder = new Notification.Builder(context);
+            // for android 8+ we need to create our own channel
+            // https://stackoverflow.com/questions/47531742/startforeground-fail-after-upgrade-to-android-8-1
+            String NOTIFICATION_CHANNEL_ID = "org.kivy.p4a";    //TODO: make this configurable
+            String channelName = "PythonSerice";                //TODO: make this configurable
+            NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, 
+                NotificationManager.IMPORTANCE_NONE);
+            
+            chan.setLightColor(Color.BLUE);
+            chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
+            NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+            manager.createNotificationChannel(chan);
+
+            Notification.Builder builder = new Notification.Builder(context, NOTIFICATION_CHANNEL_ID);
             builder.setContentTitle(serviceTitle);
             builder.setContentText(serviceDescription);
             builder.setContentIntent(pIntent);

pythonforandroid/bootstraps/service_only/build/templates/AndroidManifest.tmpl.xml

@@ -71,11 +71,13 @@
 
         {% if service %}
         <service android:name="org.kivy.android.PythonService"
-                 android:process=":pythonservice" />
+                 android:process=":pythonservice" 
+                 android:exported="true"/>
         {% endif %}
         {% for name in service_names %}
         <service android:name="{{ args.package }}.Service{{ name|capitalize }}"
-                 android:process=":service_{{ name }}" />
+                 android:process=":service_{{ name }}"
+                 android:exported="true" />
         {% endfor %}
 
         {% if args.billing_pubkey %}

pythonforandroid/bootstraps/service_only/build/templates/Service.tmpl.java

@@ -17,7 +17,7 @@ public class Service{{ name|capitalize }} extends PythonService {
      * {@inheritDoc}
      */
     @Override
-    public int getStartType() {
+    public int startType() {
         return START_STICKY;
     }
     {% endif %}

pythonforandroid/recipes/android/__init__.py

@@ -38,9 +38,10 @@ def prebuild_arch(self, arch):
         bootstrap = bootstrap_name = ctx_bootstrap
 
         is_sdl2 = bootstrap_name in ('sdl2', 'sdl2python3', 'sdl2_gradle')
-        is_webview = bootstrap_name in ('webview',)
+        is_webview = bootstrap_name == 'webview'
+        is_service_only = bootstrap_name == 'service_only'
 
-        if is_sdl2 or is_webview:
+        if is_sdl2 or is_webview or is_service_only:
             if is_sdl2:
                 bootstrap = 'sdl2'
             java_ns = u'org.kivy.android'

testapps/setup_testapp_service.py

@@ -7,7 +7,8 @@
                    'blacklist-requirements': 'openssl,sqlite3',
                    'android-api': 27,
                    'ndk-api': 21,
-                   'ndk-dir': '/home/asandy/android/crystax-ndk-10.3.2',
+                   'sdk-dir':'/opt/android/android-sdk/',
+                   'ndk-dir':'/opt/android/android-ndk-r17c/',
                    'dist-name': 'testapp_service',
                    'ndk-version': '10.3.2',
                    'bootstrap': 'service_only',