TelephonyManager telManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String operator = telManager.getSimOperator();
TextView tv=(TextView)findViewById(R.id.tv);
if(operator!=null){ if(operator.equals("46000") || operator.equals("46002")|| operator.equals("46007")){
//中国移动
tv.setText("中国移动");
}else if(operator.equals("46001")){
//中国联通
tv.setText("中国联通");
}else if(operator.equals("46003")){
//中国电信
tv.setText("中国电信");
注意在Manifest.xml中添加权限：
<uses-permission android:name="android.permission.READ_PHONE_STATE" />