MainActivity.java 文件源码

public void startTracking(){
       mTelephonyManager = (TelephonyManager) getBaseContext().getSystemService(Context.TELEPHONY_SERVICE);

       /* Check if it is a CDMA phone */
       if(mTelephonyManager.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) {
        tv1 = (TextView) findViewById(R.id.err_msg);
        tv1.setText("This application can detect a femtocell on a CDMA phone only.");
        return;
       }

       mListener = new PhoneStateListener() {
         public void onServiceStateChanged(ServiceState s){
             Log.d(TAG, "Service State changed!");
             getServiceStateInfo(s);
         }
    };
    mTelephonyManager.listen(mListener, PhoneStateListener.LISTEN_CELL_LOCATION);
    mTelephonyManager.listen(mListener, PhoneStateListener.LISTEN_SERVICE_STATE);
}