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我发现在搜索短信时，如果它太长，它可能会返回一个空指针异常。我已将其更改为 sendMultipartTextMessage 但我仍然收到空指针异常。此外，问题在于消息没有分成多个部分。

这是我的代码：

private void sendSMS(String phoneNumber, String message) {

        System.out.println("SMS: " + message);
        System.out.println("to " + phoneNumber);

        String SENT = "SMS_SENT";
        String DELIVERED = "SMS_DELIVERED";
        PendingIntent sentPI = PendingIntent.getBroadcast(this, 0, new Intent(
                SENT), 0);
        PendingIntent deliveredPI = PendingIntent.getBroadcast(this, 0,
                new Intent(DELIVERED), 0);
        // ---when the SMS has been sent---
        registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode()) {
                case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS sent",
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                    Toast.makeText(getBaseContext(), "Generic failure",
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NO_SERVICE:
                    Toast.makeText(getBaseContext(), "No service",
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_NULL_PDU:
                    Toast.makeText(getBaseContext(), "Null PDU",
                            Toast.LENGTH_SHORT).show();
                    break;
                case SmsManager.RESULT_ERROR_RADIO_OFF:
                    Toast.makeText(getBaseContext(), "Radio off",
                            Toast.LENGTH_SHORT).show();
                    break;
                }
            }
        }, new IntentFilter(SENT));

        // ---when the SMS has been delivered---
        registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context arg0, Intent arg1) {
                switch (getResultCode()) {
                case Activity.RESULT_OK:
                    Toast.makeText(getBaseContext(), "SMS delivered",
                            Toast.LENGTH_SHORT).show();
                    break;
                case Activity.RESULT_CANCELED:
                    Toast.makeText(getBaseContext(), "SMS not delivered",
                            Toast.LENGTH_SHORT).show();
                    break;
                }
            }
        }, new IntentFilter(DELIVERED));

        SmsManager sms = SmsManager.getDefault();
        Log.d("SMSTest", "Sending '" + message + "' in multiple parts.");
        ArrayList<String> parts = sms.divideMessage(message);
        Log.d("SMSTest", parts.size() + " parts:");
        for (String string : parts) {
            Log.d("SMSTest", string);
        }
        ArrayList<PendingIntent> sentList = new ArrayList<PendingIntent>();
        ArrayList<PendingIntent> deliveredList = new ArrayList<PendingIntent>();
        for (int i = 0; i < parts.size(); i++) {
            sentList.add(sentPI);
            deliveredList.add(deliveredPI);
        }
        sms.sendMultipartTextMessage(phoneNumber, null, parts, sentList,
                deliveredList);
    }

这是我的日志：

12-21 17:53:08.291: D/SMSTest(12578): Sending ' .. content of the message...'
12-21 17:53:08.311: D/SMSTest(12578): 1 parts:
12-21 17:53:08.321: E/AndroidRuntime(12578): FATAL EXCEPTION: main
12-21 17:53:08.321: E/AndroidRuntime(12578): java.lang.NullPointerException
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.os.Parcel.readException(Parcel.java:1328)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.os.Parcel.readException(Parcel.java:1276)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.android.internal.telephony.ISms$Stub$Proxy.sendText(ISms.java:613)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.telephony.SmsManager.sendTextMessage(SmsManager.java:109)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.telephony.SmsManager.sendMultipartTextMessage(SmsManager.java:269)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.telephony.gsm.SmsManager.sendMultipartTextMessage(SmsManager.java:131)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.example.senddemo.MainActivity.sendSMS(MainActivity.java:358)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.example.senddemo.MainActivity.access$0(MainActivity.java:288)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.example.senddemo.MainActivity$2.onClick(MainActivity.java:119)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.view.View.performClick(View.java:2538)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.view.View$PerformClick.run(View.java:9152)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.os.Handler.handleCallback(Handler.java:587)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.os.Looper.loop(Looper.java:130)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at android.app.ActivityThread.main(ActivityThread.java:3687)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at java.lang.reflect.Method.invokeNative(Native Method)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at java.lang.reflect.Method.invoke(Method.java:507)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
12-21 17:53:08.321: E/AndroidRuntime(12578):    at dalvik.system.NativeStart.main(Native Method)
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