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我正在製作一個應用程序,它可以讀取傳入的短信,然後檢索文本短信以將其寫入我的活動的edittext中。使用短信驗證代碼時,我的應用就像Whatsapp。當持有驗證文本代碼的活動仍在運行時,應用程序正常運行,但當活動未運行(活動完成)時,應用程序在傳入短信時會崩潰。 請幫助我,我一直有這個問題很長一段時間,它還沒有得到解決。非常感謝你的幫助。 我得到這樣的錯誤信息,使用廣播接收器接收短信時應用程序崩潰Android Studio
java.lang.RuntimeException: Unable to start receiver com.rental.roby.okkarent.aplikasi.helper.SmsReceiver: java.lang.NullPointerException
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2590)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5421)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:979)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:795)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.rental.roby.okkarent.aplikasi.helper.SmsReceiver.onReceive(SmsReceiver.java:40)
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2571)
at android.app.ActivityThread.access$1700(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1342)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5421)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:979)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:795)
at dalvik.system.NativeStart.main(Native Method)
這是我的廣播接收器的代碼,
public class SmsReceiver extends BroadcastReceiver {
private static SmsListener mListener;
@Override
public void onReceive(Context context, Intent intent) {
Bundle data = intent.getExtras();
Object[] pdus = (Object[]) data.get("pdus");
for(int i=0;i<pdus.length;i++){
SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) pdus[i]);
String sender = smsMessage.getDisplayOriginatingAddress();
//You must check here if the sender is your provider and not another one with same text.
String messageBody = smsMessage.getMessageBody();
String verificationCode = getVerificationCode(messageBody);
//Pass on the text to our listener.
Log.d("","--------------------------------------------------------"+context);
if(verificationCode != null){
// Toast.makeText(context, verificationCode, Toast.LENGTH_LONG).show();
mListener.messageReceived(verificationCode);
}
}
}
public static void bindListener(SmsListener listener) {
mListener = listener;
}
private String getVerificationCode(String message) {
String code = null;
int index = message.indexOf(":");
if (index != -1) {
int start = index + 2;
int length = 4;
code = message.substring(start, start + length);
return code;
}
return code;
}
}
這是接口,
public interface SmsListener {
public void messageReceived(String messageText);
}
最後,在我的活動,我像這樣添加代碼來自動編寫驗證碼,
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fom_verifikasi);
// asking for sms code verification,
get_verification_code(no_hp);
// catch incoming sms
SmsReceiver.bindListener(new SmsListener() {
@Override
public void messageReceived(String messageText) {
//Log.d("Text",messageText);
// write verficaation code to edittext
kode.setText(messageText);
}
});
}
這是明顯的,
<receiver android:name="com.rental.roby.okkarent.aplikasi.helper.SmsReceiver">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
謝謝非常感謝你,你真的救了我的一天:) :) 謝謝@Muthkrishnan Rajendran –