How to monitor SIM state change
android, android-service, broadcastreceiver, telephonymanager
Solution
The Intent `android.intent.action.SIM_STATE_CHANGED` is broadcast when the SIM state changes. For example, on my HTC Desire with a T-Mobile SIM card, if I put the device into flight mode the following Intent is broadcast:
- Intent: android.intent.action.SIM_STATE_CHANGED with extras: ss = NOT_READY, reason = null
If I then take it out of flight mode, the following Intents are broadcast:
- Intent: android.intent.action.SIM_STATE_CHANGED with extras: ss = LOCKED, reason = PIN
- Intent: android.intent.action.SIM_STATE_CHANGED with extras: ss = READY, reason = null
- Intent: android.intent.action.SIM_STATE_CHANGED with extras: ss = IMSI, reason = null
- Intent: android.intent.action.SIM_STATE_CHANGED with extras: ss = LOADED, reason = null
It is possible that different manufacturers and different models behave differently. As they say, "Your mileage may vary".
Problem
I'd like to be able to do some stuff when the SIM state change, i.e. play a sound when SIM PIN is required, but I think there are no Broadcast events that can be intercepted by a broadcast receiver for this... registering for android.intent.action.PHONE_STATE does only tell you when the CALL-STATE changes.. An alternative can be starting a service that registers a PhoneStateListener and reacts upon a LISTEN_SERVICE_STATE (when the state is OUT-OF-STATE it can get the SIM state from the TelephonyManager and look if the state is SIM_STATE_PIN_REQUIRED). So, my questions are: 1) Is there any broadcast intent that I can use to intercept a SIM state change or a Service State change? 2) is it a bad idea to install a PhoneStateListener within a Service and use it to deliver intents to the Service itself upon the notification of a phone state changed received by the PhoneStateListener?