Android listens to SIM status

Android listens to SIM status

1. /*
2. Listen to the broadcasting of sim status changes, and return the sim card status, valid or invalid.
3. If either card is in valid status, the system returns valid status. If both cards are invalid, the system returns invalid status.
4. */
5. Import android. app. Service;
6. Import android. content. BroadcastReceiver;
7. Import android. content. Context;
8. Import android. content. Intent;
9. Import android. telephony. TelephonyManager;
10.  
11. Public class SimStateReceive extends BroadcastReceiver {
12. Private final static String ACTION_SIM_STATE_CHANGED = "android. intent. action. SIM_STATE_CHANGED ";
13. Private final static int SIM_VALID = 0;
14. Private final static int SIM_INVALID = 1;
15. Private int simState = SIM_INVALID;
16.  
17. Public int getSimState (){
18. Return simState;
19. }
20.  
21. @ Override
22. Public void onReceive (Context context, Intent intent ){
23. If (intent. getAction (). equals (ACTION_SIM_STATE_CHANGED )){
24. TelephonyManager tm = (TelephonyManager) context. getSystemService (Service. TELEPHONY_SERVICE );
25. Int state = tm. getSimState ();
26. Switch (state ){
27. Case TelephonyManager. SIM_STATE_READY:
28. SimState = SIM_VALID;
29. Break;
30. Case TelephonyManager. SIM_STATE_UNKNOWN:
31. Case TelephonyManager. SIM_STATE_ABSENT:
32. Case TelephonyManager. SIM_STATE_PIN_REQUIRED:
33. Case TelephonyManager. SIM_STATE_PUK_REQUIRED:
34. Case TelephonyManager. SIM_STATE_NETWORK_LOCKED:
35. Default:
36. SimState = SIM_INVALID;
37. Break;
38. }
39. }
40. }
41.  
42. }