在BroadcastReceiver中使用sharedpreferences时

Question

public class PassiveSms extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    SharedPreferences sharedPref= getSharedPreferences("chaosdriver", Context.MODE_PRIVATE);
    int speedLimit = sharedPref.getInt("speedLimit", 1000);
    String message = sharedPref.getString("message", "I'm sorry, but I am driving. I will text you when I am able!");

    LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
    Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        if (lastKnownLocation.getSpeed() > speedLimit)
        {
            Bundle extras = intent.getExtras();

            if (extras == null)
            {
                return;
            }

            abortBroadcast();

            Object[] pdus = (Object[]) extras.get("pdus");
            SmsMessage msg = SmsMessage.createFromPdu((byte[]) pdus[0]);

            String origNumber = msg.getOriginatingAddress();

            onSend(origNumber);

        }
    }

public void onSend(String px)
{
    String reply = "testest";
    SmsManager smsManager = SmsManager.getDefault();
    smsManager.sendTextMessage(px, null, reply, null, null);
}

}

<?xml version="1.0" encoding="utf-8"?>

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <receiver
        android:name="biz.midl.drivereply.PassiveLocationChangedReceiver"
        android:enabled="true" />

    <activity
        android:name="biz.midl.drivereply.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="biz.midl.drivereply.Settings"
        android:label="@string/title_activity_settings" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="biz.midl.drivereply.PassiveSms"
        android:label="@string/title_activity_passive_sms" >
    </activity>
    <receiver android:name="biz.midl.drivereply.SMSReceiver" >
        <intent-filter android:priority="999" >
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>

    <service android:name=".MyService">
        <intent-filter>
            <action android:name="com.example.MyService"/>
        </intent-filter>
    </service>
</application>

有什么建议吗？

Answer 1

您必须使用：

context.getSharedPreferences("chaosdriver", Context.MODE_PRIVATE);

因为SharedPreferences只能从上下文中使用。BroadcastReceiver有适当的上下文变量作为onReceive（）方法的第一个参数，所以您可以“毫无疑问地”使用它。

现在它应该工作和解决你的问题。