带有扩展BroadcastReceiver的android getSystemService错误

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问题描述

我有2个活动

public class MainActivity extends AppCompatActivity {

    ..............
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    ..............
    ..............
    }
}

public class IncomingSms extends BroadcastReceiver{

    public void onReceive(Context context, Intent intent){
        ..............
        ..............
    }


    public String getCellData() {

        TelephonyManager telephonyManager = (TelephonyManager) ***getSystemService***(Context.TELEPHONY_SERVICE);
        GsmCellLocation cellLocation = (GsmCellLocation) telephonyManager.getCellLocation();

        ..............
        ..............

        return someString;
    }

我想从 getCellData 到无效onReceive 。 getCellData（）中的 getSystemService 上有错误。我能做什么。谢谢。

I want to get the return string from getCellData to public void onReceive. There is a error on getSystemService in getCellData(). What can I do. Thanks.

`推荐答案`

getSystemService（）是<$ c上的方法$ c>上下文。 BroadcastReceiver 不能从 Context 继承。但是，您将 Context 传递给 onReceive（）。因此，请在该 Context 参数上调用 getSystemService（）。

getSystemService() is a method on Context. BroadcastReceiver does not inherit from Context. However, you are passed a Context into onReceive(). So, call getSystemService() on that Context parameter.

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