fix various annoyances

- only ask for notication monitoring permissions the on first start
- filter out annoying system messages like keyboard notifications
- rearrange buttons
- bugfix for message being ignored when sending a test message to the
  Pebble (sender was used as message content)

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/ControlCenter.java

@@ -2,8 +2,9 @@ package nodomain.freeyourgadget.gadgetbridge;
 
 import android.app.NotificationManager;
 import android.content.Intent;
-import android.content.IntentFilter;
+import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.v4.app.NotificationCompat;
 import android.support.v7.app.ActionBarActivity;
 import android.view.Menu;
@@ -49,7 +50,7 @@ public class ControlCenter extends ActionBarActivity {
                 Intent startIntent = new Intent(ControlCenter.this, BluetoothCommunicationService.class);
                 startIntent.setAction(BluetoothCommunicationService.ACTION_SENDMESSAGE);
                 startIntent.putExtra("notification_title", editTitle.getText().toString());
-                startIntent.putExtra("notification_content", editTitle.getText().toString());
+                startIntent.putExtra("notification_content", editContent.getText().toString());
                 startService(startIntent);
             }
         });
@@ -71,12 +72,16 @@ public class ControlCenter extends ActionBarActivity {
             }
         });
 
-        Intent enableIntent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
-
-        startActivity(enableIntent);
-
-        IntentFilter filter = new IntentFilter();
-        filter.addAction("nodomain.freeyourgadget.gadgetbridge.NOTIFICATION_LISTENER");
+        /*
+         * Ask for permission to intercept notifications on first run.
+         * TODO: allow re-request in preferences
+         */
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
+        if (sharedPrefs.getBoolean("firstrun", true)) {
+            sharedPrefs.edit().putBoolean("firstrun", false).commit();
+            Intent enableIntent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
+            startActivity(enableIntent);
+        }
     }
 
     private void testNotification() {

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/NotificationListener.java

@@ -23,12 +23,21 @@ public class NotificationListener extends NotificationListenerService {
     @Override
     public void onNotificationPosted(StatusBarNotification sbn) {
         Notification notification = sbn.getNotification();
+
+        /* do not display messages from "android"
+         * This includes keyboard selection message, usb connection messages, etc
+         * Hope it does not filter out too much, we will see...
+         */
+        if (sbn.getPackageName().equals("android"))
+            return;
+
         Bundle extras = notification.extras;
         String title = extras.getString(Notification.EXTRA_TITLE);
         String content = "";
         if (extras.containsKey(Notification.EXTRA_TEXT))
             content = extras.getString(Notification.EXTRA_TEXT);
 
+
         if (content != null) {
             Intent startIntent = new Intent(NotificationListener.this, BluetoothCommunicationService.class);
             startIntent.setAction(BluetoothCommunicationService.ACTION_SENDMESSAGE);

app/src/main/res/layout/activity_controlcenter.xml

@@ -41,32 +41,32 @@
         android:id="@+id/sendButton"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Send to Pebble"
-        android:layout_above="@+id/testNotificationButton"
+        android:text="send to Pebble"
+        android:layout_below="@+id/editContent"
         android:layout_alignParentStart="true" />
     <Button
         android:id="@+id/testNotificationButton"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Create test Notification"
+        android:text="create test notification"
         android:layout_alignParentBottom="true"
         android:layout_alignParentStart="true" />
 
     <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="start Service"
+        android:text="start service"
         android:id="@+id/startServiceButton"
-        android:layout_above="@+id/sendButton"
-        android:layout_alignEnd="@+id/sendButton"
-        android:layout_alignParentStart="true" />
+        android:layout_above="@+id/setTimeButton"
+        android:layout_alignParentStart="true"
+        android:layout_alignEnd="@+id/setTimeButton" />
 
     <Button
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="set time"
         android:id="@+id/setTimeButton"
-        android:layout_above="@+id/startServiceButton"
-        android:layout_alignEnd="@+id/startServiceButton"
+        android:layout_above="@+id/testNotificationButton"
+        android:layout_alignParentEnd="true"
         android:layout_alignParentStart="true" />
 </RelativeLayout>