19 lines
1.5 KiB
Markdown
19 lines
1.5 KiB
Markdown
# Architecture: Messages (Android, ohne Google)
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Same conventions as the others; **no network permission** (SMS goes through the radio, not the internet).
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| Schicht | Wahl | warum |
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| --- | --- | --- |
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| UI | Compose, M3 Expressive, dynamic colour | same as the others |
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| Rolle | `RoleManager.ROLE_SMS` | only the default SMS app may write the SMS provider and receives SMS_DELIVER |
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| Empfangen | `SMS_DELIVER` receiver (BROADCAST_SMS), joins multipart PDUs, inserts into `Telephony.Sms.Inbox` | default app duty |
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| MMS-Pflicht | `WAP_PUSH_DELIVER` receiver (accepted, stored later with MMS support) | required for the role |
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| Senden | `SmsManager.divideMessage` + `sendMultipartTextMessage` with sent/delivered PendingIntents; row in outbox → sent/failed | status updates in the provider |
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| Antwort ohne UI | `RESPOND_VIA_MESSAGE` service (SEND_RESPOND_VIA_MESSAGE) | phone app "decline with message"; required for the role |
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| Daten | system provider via ContentResolver + ContentObserver | no copies |
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| Kontakte | PhoneLookup, same helper as Telefon | |
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Data: no own schema (DataStore for settings).
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Bites: multipart and encoding, dual SIM (`SubscriptionManager`), status callbacks after process death (receiver updates by message id), notification grouping per thread, short codes and alphanumeric senders (no reply possible).
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Build order: role + receive + list → conversation + send + status → notifications with reply → new chat, search, archive, delete → MMS.
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