JSON 안드로이드 4.2에서 작동하지 않지만 안드로이드 2.2에서 잘 작동합니까?

MainActivity 코드 : 내가 실행할 때JSON 안드로이드 4.2에서 작동하지 않지만 안드로이드 2.2에서 잘 작동합니까?

public class MainActivity extends Activity { 

private static final String TAG_CONACTS = "contacts"; 
private static final String TAG_ID = "id"; 
private static final String TAG_NAME = "name"; 
private static final String TAG_EMAIL = "email"; 
private static final String TAG_ADDRESS = "address"; 
private static final String TAG_GENDER = "gender"; 
private static final String TAG_PHONE = "phone"; 
private static final String TAG_MOBILE = "mobile"; 
private static final String TAG_HOME_PHONE = "home"; 
private JSONObject jObject; 
private JSONArray jArray; 
private TextView txt; 
private JSONArray contacts; 
private String url = "http://api.androidhive.info/contacts/"; 
private JSONObject json; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    StringBuilder builder = new StringBuilder(); 
    ; 
    txt = (TextView) findViewById(R.id.txt); 

    JSONparser jsoNparser = new JSONparser(); 
    json = jsoNparser.getJSONFromUrl(url); 

    try { 
     jArray=json.getJSONArray(TAG_CONACTS); 
     for (int i = 0; i < jArray.length(); i++) { 
      jObject=jArray.getJSONObject(i); 
      Log.e(JSONparser.class.getName(),"ID : "+ jObject.getString(TAG_ID)); 
      Log.e(JSONparser.class.getName(),"NAME : "+ jObject.getString(TAG_NAME)); 
      Log.e(JSONparser.class.getName(),"EMAIL : "+ jObject.getString(TAG_EMAIL)); 
      Log.e(JSONparser.class.getName(),"ADDRESS : "+ jObject.getString(TAG_ADDRESS)); 
      Log.e(JSONparser.class.getName(),"GENDER : "+ jObject.getString(TAG_GENDER)); 

      JSONObject phone=jObject.getJSONObject(TAG_PHONE); 
      Log.e(JSONparser.class.getName(),"MOBILE : "+ phone.getString(TAG_MOBILE)); 
      Log.e(JSONparser.class.getName(),"HOME PHONE : "+ phone.getString(TAG_HOME_PHONE)); 
     } 

    } catch (JSONException e) { 
     Log.e(JSONparser.class.getName(),e.toString()); 
    } 
}

JSONparser 클래스 공용 클래스 JSONparser {

private InputStream instream; 
private StringBuilder stringBuilder; 
private JSONObject jSonoj = null; 

// contructor 
public JSONparser() { 

} 

public JSONObject getJSONFromUrl(String url) { 
    // get JSON 
    try { 
     HttpClient client = new DefaultHttpClient(); 
     HttpPost httpPost = new HttpPost(url); 

     instream = client.execute(httpPost).getEntity().getContent(); 
    } catch (Exception e) { 
     Log.e(MainActivity.class.getName(), e.toString()); 
    } 

    // Write JSON 
    try { 
     stringBuilder = new StringBuilder(); 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       instream)); 
     String Line = null; 
     while ((Line = reader.readLine()) != null) { 
      stringBuilder.append(Line + "\n"); 
     } 
     instream.close(); 
    } catch (Exception e) { 
     Log.e(MainActivity.class.getName(), e.toString()); 
    } 

    // parse JSON 
    try { 
     jSonoj = new JSONObject(stringBuilder.toString()); 
    } catch (Exception e) { 
     Log.e(MainActivity.class.getName(), e.toString()); 
    } 
    if (jSonoj != null) 
     Log.e(JSONparser.class.getName(), "SUCCESS"); 
    return jSonoj; 
}

은}

는 안드로이드 2.2

06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): SUCCESS 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): ID : c200 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): NAME : Ravi Tamada 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): EMAIL : [email protected] 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): ADDRESS : xx-xx-xxxx,x - street, x - country 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): GENDER : male 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): MOBILE : +91 0000000000 
06-12 01:37:59.968: E/sample.jsondemo.JSONparser(1619): HOME PHONE : 00 000000

및 오류에 잘 작동 4.2

06-02 13:44:06.761: E/sample.jsondemo.MainActivity(1272): android.os.NetworkOnMainThreadException 
06-02 13:44:06.761: E/sample.jsondemo.MainActivity(1272): java.lang.NullPointerException 
06-02 13:44:06.773: E/sample.jsondemo.MainActivity(1272): org.json.JSONException: End of input at character 0 of 
06-02 13:44:06.781: D/AndroidRuntime(1272): Shutting down VM 
06-02 13:44:06.781: W/dalvikvm(1272): threadid=1: thread exiting with uncaught exception (group=0xa62b9288) 
06-02 13:44:06.797: E/AndroidRuntime(1272): FATAL EXCEPTION: main 
06-02 13:44:06.797: E/AndroidRuntime(1272): java.lang.RuntimeException: Unable to start activity ComponentInfo{sample.jsondemo/sample.jsondemo.MainActivity}: java.lang.NullPointerException 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread.access$600(ActivityThread.java:130) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.os.Handler.dispatchMessage(Handler.java:99) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.os.Looper.loop(Looper.java:137) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread.main(ActivityThread.java:4745) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at dalvik.system.NativeStart.main(Native Method) 
06-02 13:44:06.797: E/AndroidRuntime(1272): Caused by: java.lang.NullPointerException 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at sample.jsondemo.MainActivity.onCreate(MainActivity.java:44) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.Activity.performCreate(Activity.java:5008) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 
06-02 13:44:06.797: E/AndroidRuntime(1272):  ... 11 more

이 코드가 모든 버전에서 실행되기를 바랍니다. 도움주세요. 모두에게 감사합니다. link source code

출처

2013-06-12 vncoder

질문은 http://stackoverflow.com/questions/6343166/android-os-networkonmainthreadexception과 비슷합니다. – AlvinArulselvan

plz Google을 사용합니다.이 질문을 여러 번 논의했습니다. – Sam

메인 스레드 (예 : onCreate())에서 네트워크 작업을 수행 할 수 없습니다. Android Network Training은 AsyncTask을 사용하여 네트워크 요청을하거나 다른 스레드에서 오랜 시간이 걸릴 수있는 것을 제안합니다. 이렇게하면 응용 프로그램이 응답을 중지 한 것처럼 보이지 않습니다.

출처

2013-06-12 03:47:08 ianhanniballake

이 말을하기 위해 여기에 왔거나 AsyncTask ..를 사용했습니다. 스레드가 완료되면 잠시 시간이 지나면 앱이 정지 된 것처럼 보입니다. – tricknology

감사합니다, 내가 안드로이드 배우기 시작했을 때 나는 그것을 몰랐습니다. – vncoder

JSON 안드로이드 4.2에서 작동하지 않지만 안드로이드 2.2에서 잘 작동합니까?

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