这是我的AsyncTask
类:
public class JSONParser extends AsyncTask { public interface MyCallbackInterface { public void onRequestComplete(JSONObject result); } private MyCallbackInterface mCallback; public JSONParser(MyCallbackInterface callback) { mCallback = callback; Context context = (Context) callback; } public JSONObject getJSONFromUrl(String url) { // Making HTTP request DefaultHttpClient httpClient = new DefaultHttpClient(); HttpGet httpPost = new HttpGet(url); HttpResponse getResponse = null; final HttpParams httpParameters = httpClient.getParams(); HttpConnectionParams.setConnectionTimeout(httpParameters, 10 * 10000); HttpConnectionParams.setSoTimeout (httpParameters, 10 * 10000); try { getResponse = httpClient.execute(httpPost); } catch (ClientProtocolException e2) { e2.printStackTrace(); } catch (IOException e2) { e2.printStackTrace(); } final int statusCode = getResponse.getStatusLine().getStatusCode(); if (statusCode != HttpStatus.SC_OK) { Log.w(getClass().getSimpleName(), "Error " + statusCode + " for URL " + url); return null; } HttpEntity getResponseEntity = getResponse.getEntity(); String json = null; try { json = EntityUtils.toString(getResponseEntity); } catch (ParseException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } JSONObject jObj = null; // try parse the string to a JSON object try { jObj = new JSONObject(json); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } // return JSON String return jObj; } @Override protected JSONObject doInBackground(String... params) { String url = params[0]; return getJSONFromUrl(url); } @Override protected void onPostExecute(JSONObject result) { mCallback.onRequestComplete(result); } }
public class RegisterActivity extends Activity implements MyCallbackInterface{ ... @Override public void onRequestComplete(JSONObject json) { //hire parse and display json ...
JSONParser mJSONParser1 = new JSONParser(context111); mJSONParser1.execute(SERVER_URL+"?method=registration&user="+user+"&pass="+pass+"®Id="+regId);
10-03 15:58:02.303: W/System.err(22414): java.net.SocketException: Connection timed out 10-03 15:58:02.350: W/System.err(22414): at org.apache.harmony.luni.platform.OSNetworkSystem.read(Native Method) 10-03 15:58:02.366: W/System.err(22414): at dalvik.system.BlockGuard$WrappedNetworkSystem.read(BlockGuard.java:273) 10-03 15:58:02.366: W/System.err(22414): at org.apache.harmony.luni.net.PlainSocketImpl.read(PlainSocketImpl.java:458) 10-03 15:58:02.366: W/System.err(22414): at org.apache.harmony.luni.net.SocketInputStream.read(SocketInputStream.java:85) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:179) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:425) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 10-03 15:58:02.366: W/System.err(22414): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 10-03 15:58:02.366: W/System.err(22414): at com.androidhive.pushnotifications.JSONParser.getJSONFromUrl(JSONParser.java:72) 10-03 15:58:02.366: W/System.err(22414): at com.androidhive.pushnotifications.JSONParser.doInBackground(JSONParser.java:121) 10-03 15:58:02.366: W/System.err(22414): at com.androidhive.pushnotifications.JSONParser.doInBackground(JSONParser.java:1) 10-03 15:58:02.366: W/System.err(22414): at android.os.AsyncTask$2.call(AsyncTask.java:185) 10-03 15:58:02.366: W/System.err(22414): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 10-03 15:58:02.366: W/System.err(22414): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 10-03 15:58:02.366: W/System.err(22414): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 10-03 15:58:02.374: W/System.err(22414): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 10-03 15:58:02.374: W/System.err(22414): at java.lang.Thread.run(Thread.java:1019) 10-03 15:58:02.374: W/dalvikvm(22414): threadid=9: thread exiting with uncaught exception (group=0x40018560) 10-03 15:58:02.374: E/AndroidRuntime(22414): FATAL EXCEPTION: AsyncTask #1 10-03 15:58:02.374: E/AndroidRuntime(22414): java.lang.RuntimeException: An error occured while executing doInBackground() 10-03 15:58:02.374: E/AndroidRuntime(22414): at android.os.AsyncTask$3.done(AsyncTask.java:200) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.lang.Thread.run(Thread.java:1019) 10-03 15:58:02.374: E/AndroidRuntime(22414): Caused by: java.lang.NullPointerException 10-03 15:58:02.374: E/AndroidRuntime(22414): at com.androidhive.pushnotifications.JSONParser.getJSONFromUrl(JSONParser.java:81) 10-03 15:58:02.374: E/AndroidRuntime(22414): at com.androidhive.pushnotifications.JSONParser.doInBackground(JSONParser.java:121) 10-03 15:58:02.374: E/AndroidRuntime(22414): at com.androidhive.pushnotifications.JSONParser.doInBackground(JSONParser.java:1) 10-03 15:58:02.374: E/AndroidRuntime(22414): at android.os.AsyncTask$2.call(AsyncTask.java:185) 10-03 15:58:02.374: E/AndroidRuntime(22414): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 10-03 15:58:02.374: E/AndroidRuntime(22414): ... 4 more
JSONParser mJSONParser1=new JSONParser(context111);mjsonParser1.execute(server_url+“?method=registration&user=”+user+“&pass=”+pass+“®id=”+regid)
输入错误还是直接剪切/粘贴?在“id=”位旁边有一些不寻常的字符。
而且您确实有导致空的代码行,那么为什么它是空的(正如tyczj指出的)
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