私は次のコードを持っています:
public class SmsReceiver extends BroadcastReceiver
{
private DBOperations DataDBoperation;
String str = "";
String password;
@Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
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]);
str += msgs[i].getMessageBody().toString();
}
//---if incomming msg is equal to Msg pattern
int triggerCommand = getMsgPattern(context);
if(triggerCommand == 1 || triggerCommand == 2 || triggerCommand == 3 || triggerCommand == 4 || triggerCommand == 5 || triggerCommand == 6)
{
switch(triggerCommand)
{
case 1:
{ ///// BACKUP
Intent i=new Intent(context,UploadContent.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
break;
}
case 2:
{
//// FORMAT
Intent j=new Intent(context,DeleteContent.class);
j.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(j);
break;
}
}
//-------- delete this sms here ----------
abortBroadcast();
}
}
public int getMsgPattern(Context c)
{
DataDBoperation = new DBOperations(c);
String[] valuesPassword = DataDBoperation.getUserPasswordsString();
password = valuesPassword[0];
String pattern1 = "BACKUP *" + password + "*";
String pattern2 = "FORMAT *" + password + "*";
String pattern3 = "LOCATE *" + password + "*";
String pattern4 = "WIPE *" + password + "*";
String pattern5 = "LOCK *" + password + "*";
String pattern6 = "RESETPASSWORD *" + password + "*";
if(pattern1.equalsIgnoreCase(str))
{
return 1;
}
else if(pattern2.equalsIgnoreCase(str))
{
return 2;
}
return 0;
}
}
エラーログ：
10-11 12:59:54.842: E/AndroidRuntime(18743): FATAL EXCEPTION: main
10-11 12:59:54.842: E/AndroidRuntime(18743): java.lang.RuntimeException: Unable to start receiver iiu.fyp.cdsr.SmsReceiver: java.lang.NullPointerException
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2379)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.app.ActivityThread.access$1500(ActivityThread.java:149)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1380)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.os.Handler.dispatchMessage(Handler.java:99)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.os.Looper.loop(Looper.java:153)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.app.ActivityThread.main(ActivityThread.java:5026)
10-11 12:59:54.842: E/AndroidRuntime(18743): at java.lang.reflect.Method.invokeNative(Native Method)
10-11 12:59:54.842: E/AndroidRuntime(18743): at java.lang.reflect.Method.invoke(Method.java:511)
10-11 12:59:54.842: E/AndroidRuntime(18743): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
10-11 12:59:54.842: E/AndroidRuntime(18743): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
10-11 12:59:54.842: E/AndroidRuntime(18743): at dalvik.system.NativeStart.main(Native Method)
10-11 12:59:54.842: E/AndroidRuntime(18743): Caused by: java.lang.NullPointerException
10-11 12:59:54.842: E/AndroidRuntime(18743): at iiu.fyp.cdsr.DBOperations.getUserPasswordsString(DBOperations.java:149)
10-11 12:59:54.842: E/AndroidRuntime(18743): at iiu.fyp.cdsr.SmsReceiver.getMsgPattern(SmsReceiver.java:89)
10-11 12:59:54.842: E/AndroidRuntime(18743): at iiu.fyp.cdsr.SmsReceiver.onReceive(SmsReceiver.java:31)
10-11 12:59:54.842: E/AndroidRuntime(18743): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2372)
10-11 12:59:54.842: E/AndroidRuntime(18743): ... 10 more
特定のSMSを受信したときにアクティビティを呼び出し、単語の後に受信ボックスから削除する必要があります.abortbroadcast（）のために、SMSサービスよりも優先度を高く設定しました..実際の問題はどこですか？誰かがそれを修正できますか？
編集：
以下は、sqlite からパスワードを取得するための私の DB コードです。
public String[] getUserPasswordsString() {
List PasswordClass = new ArrayList();
Cursor cursor = database.query(DataBaseWrapper.PasswordTable,
PASSWORD_TABLE_COLUMNS, null, null, null, null, null);
cursor.moveToFirst();
String[ ] password = new String[1] ;
int i=0;
while (!cursor.isAfterLast()) {
PasswordClass sim = parsePasswords(cursor);
password[i] = sim.getUserPassword().toString();
i++;
PasswordClass.add(sim);
cursor.moveToNext();
}
cursor.close();
return password;
}
private PasswordClass parsePasswords(Cursor cursor) {
PasswordClass UserPassword = new PasswordClass();
UserPassword.setUserPasswordId((cursor.getInt(0)));
UserPassword.setUserPassword(cursor.getString(1));
return UserPassword;
}