android监控SIM卡状态的广播示例代码

/* 
     监听sim状态改变的广播，返回sim卡的状态， 有效或者无效。 
    双卡中只要有一张卡的状态有效即返回状态为有效，两张卡都无效则返回无效。 
 */  
import android.app.Service;  
import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.telephony.TelephonyManager;  
  
public class SimStateReceive extends BroadcastReceiver {  
    private final static String ACTION_SIM_STATE_CHANGED = "android.intent.action.SIM_STATE_CHANGED";  
    private final static int SIM_VALID = 0;  
    private final static int SIM_INVALID = 1;  
    private int simState = SIM_INVALID;  
      
    public int getSimState() {  
        return simState;  
    }  
  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        System.out.println("sim state changed");  
        if (intent.getAction().equals(ACTION_SIM_STATE_CHANGED)) {  
            TelephonyManager tm = (TelephonyManager)context.getSystemService(Service.TELEPHONY_SERVICE);   
            int state = tm.getSimState();  
            switch (state) {  
            case TelephonyManager.SIM_STATE_READY :  
                simState = SIM_VALID;  
                break;  
            case TelephonyManager.SIM_STATE_UNKNOWN :  
            case TelephonyManager.SIM_STATE_ABSENT :  
            case TelephonyManager.SIM_STATE_PIN_REQUIRED :  
            case TelephonyManager.SIM_STATE_PUK_REQUIRED :  
            case TelephonyManager.SIM_STATE_NETWORK_LOCKED :  
            default:  
                simState = SIM_INVALID;  
                break;  
            }  
        }  
    }  
  
}  

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