-3

我的活动在 Android 4.1 上不起作用，但在 2.2、2.3 和 4.0 上运行良好。我在下面粘贴的 logcat 中显示了一些错误。

怎么了？

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;
}}

日志猫：

 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)
4

2 回答 2

0

它的发生是因为没有AsyncTask. 将所有HttpClient逻辑放到AsyncTask.

从您的日志中：

android.os.NetworkOnMainThreadException

您不能parseJSONData在主线程上运行。

这是一些如何实现它的示例：

 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);
        }
    }
}

从您的活动中调用它：

 AsyncRequestConnection task = new AsyncRequestConnection ();
 task.execute();
于 2013-10-01T12:17:05.837 回答
0

所有与网络相关的操作都不能在 UI 线程中运行。这一定是导致问题的原因。更多细节。 http://developer.android.com/training/basics/network-ops/connecting.html

于 2013-10-01T12:21:42.070 回答