我的活動在4.0上運行良好，不適用於4.2

-3

我的活動在Android 4.1上不起作用，但它在2.2,2.3和4.0上正常工作。我在下面粘貼的logcat中顯示一些錯誤。我的活動在4.0上運行良好，不適用於4.2

發生了什麼事？

public class fifthscreen extends Activity { 
    String num = null; 
    TextView ingredient; 
    ImageButton slideHandleButton; 

    String name; 
    String name2; 
    long Menu_ID; 
    String dish_name; 
    String Type; 
    String status; 
    String message; 
    // HorizontalListView listview; 
    // CategoryListAdapter3 cla; 
    String DescriptionAPI; 
    // ImageLoader2 imgLoader; 
    TextView txt1, txt2, txt3; 
    ImageView img1; 
    String URL, URL2; 
    String SelectMenuAPI; 
    static ArrayList <Long> Category_ID = new ArrayList <Long>(); 
    static ArrayList <String> Category_name = new ArrayList <String>(); 
    static ArrayList <String> Category_image = new ArrayList <String>(); 
    public static String allergen2; 

    // private AQuery androidAQuery; 

    @Override public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.fifthscreen); 
    ingredient = (TextView) findViewById(R.id.ingredient); 
    img1 = (ImageView) findViewById(R.id.test_button_image); 

    txt1 = (TextView) findViewById(R.id.menuname); 
    // txt2 = (TextView) findViewById(R.id.test_button_text1); 
    txt3 = (TextView) findViewById(R.id.description); 

    Intent iGet = getIntent(); 

    ImageView options = (ImageView) findViewById(R.id.options5); 
    // androidAQuery = new AQuery(this); 

    options.setOnClickListener(new OnClickListener() { 
        @Override public void onClick(View v) { 
        Intent iMenuList = new Intent(fifthscreen.this, LinkButtons.class); startActivity(iMenuList);}}); 

    dish_name = iGet.getStringExtra("dish_name"); 

    ImageView btnback = (ImageView) findViewById(R.id.btnback); 

    btnback.setOnClickListener(new OnClickListener() { 
        @Override public void onClick(View v) { 
        finish();} 
        }); 

    parseJSONData(); 

    } 

    void clearData() { 
    Category_ID.clear(); 
    Category_name.clear(); 
    Category_image.clear(); 

    } 

    public void parseJSONData() { 

    SelectMenuAPI = Utils.dishdescription + dish_name; 

    // SelectMenuAPI = Utils.dishdescription; 

    clearData(); 
    URL = SelectMenuAPI; 
    URL2 = URL.replace(" ", "%20"); 

    // URL2 = SelectMenuAPI; 

    try { 

     HttpClient client = new DefaultHttpClient(); 
     HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000); 
     HttpConnectionParams.setSoTimeout(client.getParams(), 15000); 
     HttpUriRequest request = new HttpGet(URL2); 
     HttpResponse response = client.execute(request); 
     InputStream atomInputStream = response.getEntity().getContent(); 
     BufferedReader in = new BufferedReader(new InputStreamReader(atomInputStream)); 

     String line; 
     String str = ""; 
     while ((line = in.readLine()) != null) { 
     str += line; 
     } 

     JSONObject json2 = new JSONObject(str); 

     status = json2.getString("status"); 
     if (status.equals("1")) { 

     JSONArray school2 = json2.getJSONArray("data"); 
     String[]mVal = new String[school2.length()]; 

     for (int i = 0; i < school2.length(); i++) { 

      String name = school2.getJSONObject(0).getString("name"); 
      txt1.setText(name); 

      String description = school2.getJSONObject(0).getString("description"); 

      txt3.setText(description); 

      String url1 = school2.getJSONObject(0).getString("image"); 

      androidAQuery.id(img1).image(url1, false, false); 

     } 

     JSONObject school3 = json2.getJSONObject("dish_nutrition"); 

     final TableLayout table = (TableLayout) findViewById(R.id.table2); 

     for (int j = 0; j < school3.length(); j++) { 

      String s = String.valueOf(j + 1); 

      final View row = createRow(school3.getJSONObject(s)); 
      table.addView(row); 

     } 

     JSONArray school4 = json2.getJSONArray("dish_allergen"); 
     // 
     for (int i = 0; i < school4.length(); i++) { 
      JSONObject object = school4.getJSONObject(i); 

      Category_ID.add((long) i); 
      Category_name.add(object.getString("name")); 
      Category_image.add(object.getString("image")); 
      listview.setAdapter(cla); 

     } 

     final LinearLayout table3 = (LinearLayout) findViewById(R.id.table3); 

     JSONArray school5 = json2.getJSONArray("dish_ingredient"); 

     for (int i = 0; i < school5.length(); i++) { 
      JSONObject jsonObject = school5.getJSONObject(i); 

      final View row2 = createRow2(school5.getJSONObject(i)); 
      table3.addView(row2); 

     } 

     } 

     else { 

     JSONArray school2 = json2.getJSONArray("data"); 
     for (int i = 0; i < school2.length(); i++) { 
      JSONObject object = school2.getJSONObject(i); 

      Category_ID.add((long) i); 
      Category_name.add(object.getString("name")); 

     } 

     } 

    } catch(MalformedURLException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } catch(IOException e) { 
     // TODO Auto-generated catch block 
     // IOConnect = 1; 
     e.printStackTrace(); 
    } catch(JSONException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    } 

    public View createRow(JSONObject item) throws JSONException { 
    View row = getLayoutInflater().inflate(R.layout.rows, null); 
    ((TextView) row.findViewById(R.id.localTime)).setText(item.getString("qty")); 
    ((TextView) row.findViewById(R.id.apprentTemp)).setText(item.getString("name")); 

    return row; 
    } public View createRow2(JSONObject item) throws JSONException { 

    View row2 = getLayoutInflater().inflate(R.layout.row2, null); 
    ((TextView) row2.findViewById(R.id.name)).setText(item.getString("name")); 
    ((TextView) row2.findViewById(R.id.subingredients)).setText(item.getString("sub_ingredients")); 

    return row2; 
}}

的logcat：

Skipped 74 frames! The application may be doing too much work on its main thread. 
Skipped 61 frames! The application may be doing too much work on its main thread. 
    Shutting down VM 
    threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
FATAL EXCEPTION: main 
java.lang.RuntimeException: Unable to start activity 
ComponentInfo{com.schoollunchapp/com.schoollunchapp.fifthscreen}: 
    android.os.NetworkOnMainThreadException 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
at android.app.ActivityThread.access$600(ActivityThread.java:141) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:5041) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
at dalvik.system.NativeStart.main(Native Method) 
    Caused by: android.os.NetworkOnMainThreadException 
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 
at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84) 
at libcore.io.IoBridge.connectErrno(IoBridge.java:144) 
at libcore.io.IoBridge.connect(IoBridge.java:112) 
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 
at java.net.Socket.connect(Socket.java:842) 
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119) 
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection 
     (DefaultClientConnectionOperator.java:144) 
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
at 
    org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
at 
    org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
at com.schoollunchapp.fifthscreen.parseJSONData(fifthscreen.java:196) 
at com.schoollunchapp.fifthscreen.onCreate(fifthscreen.java:157) 
at android.app.Activity.performCreate(Activity.java:5104) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)

來源

2013-10-01 user2806157

這是因爲缺乏AsyncTask的。把所有的HttpClient邏輯設置爲AsyncTask。

從日誌：

android.os.NetworkOnMainThreadException

您不能在主線程運行parseJSONData。

下面是一些例子，如何實現它：

private class AsyncRequestConnection extends AsyncTask<Void, Void, String> { 
    private final Request request; 

    public AsyncRequestConnection(Request request) { 
     this.request = request; 
    } 

    @Override 
    protected String doInBackground(Void... params) { 
     try { 
      HttpPost p = createRequestHttpMessage(request); 
      String resp = new String(stripResponse(getRequestClient().execute(p))); 
      Log.v(TAG, resp); 
      return resp; 
     } catch (Exception e) { 
      Log.e(TAG, "Cannot complete API request", e); 
      cancel(false); 
      return null; 
     } 
    } 

    @Override 
    protected void onCancelled() { 
     request.backoff(); 
     if (request.hasReachedMaxBackoff()) { 
      request.cancel(R.string.error_internal); 
     } else { 
      requestQueue.enqueue(request);    
     } 
     requestConnection = null; 
     nextRequest(); 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     if (result != null) { 
      request.attachResponse(result); 
      request.handleResponse();    
      requestConnection = null; 
      nextRequest(); 
     } else { 
      request.cancel(R.string.error_internal); 
     } 
    } 
}

從活動叫它：

AsyncRequestConnection task = new AsyncRequestConnection(); 
task.execute();

來源

2013-10-01 12:17:05

怎麼樣？給我主意 – user2806157

PLZ編輯我的代碼和如何做？ – user2806157

我發佈了一個示例，閱讀它並使您的代碼適應該示例。 –

所有網絡相關的操作是不是在UI線程中運行。這一定是造成這個問題的原因。更多細節。 http://developer.android.com/training/basics/network-ops/connecting.html

來源

2013-10-01 12:21:42

我的活動在4.0上運行良好，不適用於4.2

回答

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