我正在尝试使用SMS作为激活器来创建手机定位器，但是当我向手机发送短信时，应用程序始终崩溃（强制关闭）：
这是我的课程代码：
public class SMSReceiver extends BroadcastReceiver{
private static final String FAR_MODE_KEY = "farmode";
private String FarModeKeyword;
@Override
public void onReceive(Context context, Intent intent) {
prefs = getSharedPreferences(Keywords, MODE_PRIVATE);
FarModeKeyword = prefs.getString(FAR_MODE_KEY, "");
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String message = "";
String number = "";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
message += msgs[i].getMessageBody().toString();
}
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
number += msgs[i].getOriginatingAddress();
}
}
if (message == FarModeKeyword)
{
Toast.makeText(getBaseContext(),
message,
Toast.LENGTH_SHORT).show();
String loc = "";
loc = getLocation();
Toast.makeText(getBaseContext(),
loc,
Toast.LENGTH_SHORT).show();
sendSMS(number, loc);
}
}
private void sendSMS(String phoneNumber, String message)
{
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phoneNumber, null, message, null, null);
}
private String getLocation ()
{
// Get the location manager
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria ();
String bestProvider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(bestProvider);
LocationListener MyLocListener = new loc_listener();
locationManager.requestLocationUpdates(bestProvider, 1000, 1, MyLocListener);
String add = "";
Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());
try
{
List<Address> addresses = geoCoder.getFromLocation(lat,lon, 1);
if (addresses.size() > 0)
{
for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();i++)
add += addresses.get(0).getAddressLine(i) + "\n";
}
}
catch (IOException e)
{
e.printStackTrace();
}
locationManager.removeUpdates(MyLocListener);
return add;
}
public class loc_listener implements LocationListener
{
public void onLocationChanged(Location l) {
lat = l.getLatitude();
lon = l.getLongitude();
}
public void onProviderEnabled(String p) {
}
public void onProviderDisabled(String p) {
}
public void onStatusChanged(String p, int status, Bundle extras){
}
}
}
这是清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="locateodroid.james"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="locateodroid.james.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyBBo4h4fDksXasHd7iCgIg0A5wTriToW8w"/>
<permission
android:name="locateodroid.james.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="locateodroid.james.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>
<receiver
android:name=".receiver.StartMyServiceAtBootReceiver"
android:enabled="true"
android:exported="true"
class="locateodroid.james.receiver.StartMyServiceAtBootReceiver"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<receiver android:name="locateodroid.james.sms.SMSReceiver"
class="locateodroid.james.sms.SmsReceiver"
android:label="SMSReceiver">
<intent-filter android:priority="2147483647">
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
</application>
</manifest>
这是错误的logcat：
02-05 04:03:25.169: E/AndroidRuntime(430): FATAL EXCEPTION: main
02-05 04:03:25.169: E/AndroidRuntime(430): java.lang.RuntimeException: Unable to instantiate receiver locateodroid.james.sms.SMSReceiver: java.lang.ClassNotFoundException: locateodroid.james.sms.SMSReceiver in loader dalvik.system.PathClassLoader[/data/app/locateodroid.james-1.apk]
02-05 04:03:25.169: E/AndroidRuntime(430): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1773)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.app.ActivityThread.access$2400(ActivityThread.java:117)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.os.Handler.dispatchMessage(Handler.java:99)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.os.Looper.loop(Looper.java:123)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-05 04:03:25.169: E/AndroidRuntime(430): at java.lang.reflect.Method.invokeNative(Native Method)
02-05 04:03:25.169: E/AndroidRuntime(430): at java.lang.reflect.Method.invoke(Method.java:507)
02-05 04:03:25.169: E/AndroidRuntime(430): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-05 04:03:25.169: E/AndroidRuntime(430): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-05 04:03:25.169: E/AndroidRuntime(430): at dalvik.system.NativeStart.main(Native Method)
02-05 04:03:25.169: E/AndroidRuntime(430): Caused by: java.lang.ClassNotFoundException: locateodroid.james.sms.SMSReceiver in loader dalvik.system.PathClassLoader[/data/app/locateodroid.james-1.apk]
02-05 04:03:25.169: E/AndroidRuntime(430): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
02-05 04:03:25.169: E/AndroidRuntime(430): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
02-05 04:03:25.169: E/AndroidRuntime(430): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-05 04:03:25.169: E/AndroidRuntime(430): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1764)
02-05 04:03:25.169: E/AndroidRuntime(430): ... 10 more
我正在处理这个错误差不多2天但我仍然没有答案，有人可以帮我解决这个问题吗？提前致谢！
更新
第一个问题现在已经解决了，但另一个错误是aries，当我收到短信时会抛出NullPointerException
package locateodroid.james;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.telephony.SmsMessage;
import android.widget.EditText;
import android.widget.Toast;
public class SMSReceiver extends BroadcastReceiver{
public SharedPreferences prefs;
private String FarModeKeyword;
private String Keywords = "prefmode";
private Double lat;
private Double lon;
private static final String FAR_MODE_KEY = "farmode";
private Context con;
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,
"test",
Toast.LENGTH_SHORT).show();
con = context;
prefs = getSharedPreferences(Keywords, Context.MODE_PRIVATE);
FarModeKeyword = prefs.getString(FAR_MODE_KEY, "");
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String message = "";
String number = "";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
message += msgs[i].getMessageBody().toString();
}
for (int i=0; i<msgs.length; i++)
{
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
number += msgs[i].getOriginatingAddress();
}
}
if (message == FarModeKeyword)
{
Toast.makeText(context,
message,
Toast.LENGTH_SHORT).show();
String loc = "";
loc = getLocation();
Toast.makeText(context,
loc,
Toast.LENGTH_SHORT).show();
sendSMS(number, loc);
}
}
private SharedPreferences getSharedPreferences(String keywords2,
int modePrivate) {
// TODO Auto-generated method stub
return null;
}
private void sendSMS(String phoneNumber, String message)
{
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phoneNumber, null, message, null, null);
}
private String getLocation ()
{
// Get the location manager
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria ();
String bestProvider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(bestProvider);
LocationListener MyLocListener = new loc_listener();
locationManager.requestLocationUpdates(bestProvider, 1000, 1, MyLocListener);
String add = "";
Geocoder geoCoder = new Geocoder(con, Locale.getDefault());
try
{
List<Address> addresses = geoCoder.getFromLocation(lat,lon, 1);
if (addresses.size() > 0)
{
for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();i++)
add += addresses.get(0).getAddressLine(i) + "\n";
}
}
catch (IOException e)
{
e.printStackTrace();
}
locationManager.removeUpdates(MyLocListener);
return add;
}
private LocationManager getSystemService(String locationService) {
// TODO Auto-generated method stub
return null;
}
public class loc_listener implements LocationListener
{
public void onLocationChanged(Location l) {
lat = l.getLatitude();
lon = l.getLongitude();
}
public void onProviderEnabled(String p) {
}
public void onProviderDisabled(String p) {
}
public void onStatusChanged(String p, int status, Bundle extras) {
}
}
}
该类现在返回NullPointerException错误：（
答案 0 :(得分：0)
无法找到班级：
Caused by: java.lang.ClassNotFoundException: locateodroid.james.sms.SMSReceiver
你确定包参考吗？
这可能来自收件人的课程内容：
class="locateodroid.james.sms.SmsReceiver"
您不能使用这些上下文属性的原因是因为它们是 STATIC 常量
意味着你从基类中获取它们（不需要实例），如下所示：
Context.MODE_PRIVATE