java.lang.RuntimeException: Unable to start activity ComponentInfo

Question

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02-20 11:54:30.076: D/AndroidRuntime(27093): Shutting down VM 02-20 11:54:30.076: W/dalvikvm(27093): threadid=1: thread exiting with uncaught exception (group=0x418602a0) 02-20 11:54:30.076: E/AndroidRuntime(27093): FATAL EXCEPTION: main 02-20 11:54:30.076: E/AndroidRuntime(27093): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.gcmmanager/com.example.gcmmanager.GCMSendMessage}: java.lang.NullPointerException: println needs a message 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread.access$700(ActivityThread.java:140) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.os.Handler.dispatchMessage(Handler.java:99) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.os.Looper.loop(Looper.java:137) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread.main(ActivityThread.java:4946) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at java.lang.reflect.Method.invokeNative(Native Method) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at java.lang.reflect.Method.invoke(Method.java:511) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at dalvik.system.NativeStart.main(Native Method) 02-20 11:54:30.076: E/AndroidRuntime(27093): Caused by: java.lang.NullPointerException: println needs a message 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.util.Log.println_native(Native Method) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.util.Log.w(Log.java:225) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at com.example.gcmmanager.GCMSendMessage.getJson(GCMSendMessage.java:193) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at com.example.gcmmanager.GCMSendMessage.onCreate(GCMSendMessage.java:74) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.Activity.performCreate(Activity.java:5206) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) 02-20 11:54:30.076: E/AndroidRuntime(27093):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074) 02-20 11:54:30.076: E/AndroidRuntime(27093):  ... 11 more 02-20 11:54:32.041: I/Process(27093): Sending signal. PID: 27093 SIG: 9

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public void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.send_message);             setLayout(); //     단일전송시에는 주석처리      getJson(SELECT_PAGE); //     단일전송시에는 주석처리      getToken();       }

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public void getJson(String addr){      StringBuilder jsonHtml = new StringBuilder();      try{       //연결 url 설정       URL url = new URL(addr);       //컨넥션 객체 생성       HttpURLConnection conn = (HttpURLConnection)url.openConnection();       conn.setDefaultUseCaches(false);                                                       conn.setDoInput(true);                         // 서버에서 읽기 모드 지정             conn.setDoOutput(true);                       // 서버로 쓰기 모드 지정             conn.setRequestMethod("POST");         // 전송 방식은 POST                     //연결되었다       if(conn != null){        conn.setConnectTimeout(10000);        conn.setUseCaches(false);        //연결확인 코드가 리턴되었을 때        if(conn.getResponseCode() == HttpURLConnection.HTTP_OK){         BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));         for(;;){          String line = br.readLine();          if(line == null) break;          jsonHtml.append(line);         }         br.close();        }        conn.disconnect();       }      }catch(Exception e){       Log.w(TAG, e.getMessage());      }      JSON =  jsonHtml.toString();     }

로그에 대한 관련 소스입니다.

이 익셉션 해결할 방법이 없을까요??

 

 

 

http://androidside.com/bbs/board.php?bo_table=B49&wr_id=80531&sfl=wr_subject%7C%7Cwr_content%2C1&stx=%EC%97%90%EB%9F%AC+%EC%A0%9C%EB%B0%9C+Content+is+not+allowed+in+trailing+section.&sst=wr_hit&sod=desc&sop=or&page=106

이글의 예제 프로젝트 이구요.

하.. ㅠㅠ 동아리 어플에 GCM으로 공지 띄울려는데 GCM이 쉽지가 않네요.

Answer 1

Log 클래스의 메소드로 로그 출력시 null을 넘겨주셨네요.

 

null 체크 해주세요.

 

GCMSendMessage.java의 193 번째 줄이요~