我正在尝试使用下面介绍的 JSONParser 类解析 JSON。
根据断点，这行代码似乎崩溃了：
HttpResponse httpResponse = httpClient.execute(httpPost);
我不知道该怎么做。我将不胜感激。
分段
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.agenda, container, false);
final ListView listview = (ListView)view.findViewById(R.id.listView);
String[] values = new String[] {"Summit 2013","Sponsors","Agenda","Survey","Website","Credits" };
Log.v(TAG,"Created");
String[] array = new String[10];
array[0] = "";
**new RetrieveFeedTask().doInBackground("");**
异步任务
class RetrieveFeedTask extends AsyncTask<String, Void, JSONObject> {
private Exception exception;
protected JSONObject doInBackground(String... params) {
try {
// URL url= new URL(urls[0]);
JSONParser parser = new JSONParser();
JSONObject jobject = parser.getJSONFromUrl("http://www.itenwired.com/json");
return jobject;
} catch (Exception e) {
this.exception = e;
Log.v(TAG,"Exception"+exception.getLocalizedMessage());
return null;
}
}
protected void onPostExecute(JSONObject result) {
Log.v(TAG,"Downloaded");
Log.v(TAG,result.toString());
}
}
JSON解析器
package com.iten.itenwired2013;
/**
* Created by jmc72 on 7/10/13.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import org.apache.http.client.HttpResponseException;
import android.util.Log;
public class JSONParser {
private static final String TAG = "JSON PARSER";
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Log.v(TAG, httpPost.getURI().toString());
//new HttpPost();
httpPost.setHeader("Content-type", "application/json");
Log.v(TAG, "01");
HttpResponse httpResponse = httpClient.execute(httpPost);
Log.v(TAG, "Aaa " + httpResponse.toString());
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
Log.v(TAG, "1");
}
catch (HttpResponseException e) {
Log.v(TAG, "000");
}
catch (UnsupportedEncodingException e) {
Log.v(TAG, "2");
e.printStackTrace();
} catch (ClientProtocolException e) {
Log.v(TAG, "3");
e.printStackTrace();
} catch (IOException e) {
Log.v(TAG, "4");
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// 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;
}
}
日志猫
07-12 14:18:19.713 322-656/system_process W/ActivityManager: Unbind failed: could not find connection for android.os.BinderProxy@40d233c0
07-12 14:18:20.953 1304-1304/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
07-12 14:18:20.953 1304-1304/? D/AndroidRuntime: CheckJNI is ON
07-12 14:18:21.002 1304-1304/? D/dalvikvm: Trying to load lib libjavacore.so 0x0
07-12 14:18:21.012 1304-1304/? D/dalvikvm: Added shared lib libjavacore.so 0x0
07-12 14:18:21.052 1304-1304/? D/dalvikvm: Trying to load lib libnativehelper.so 0x0
07-12 14:18:21.052 1304-1304/? D/dalvikvm: Added shared lib libnativehelper.so 0x0
07-12 14:18:21.993 1304-1304/? D/AndroidRuntime: Calling main entry com.android.commands.pm.Pm
07-12 14:18:22.072 322-345/system_process W/ActivityManager: No content provider found for permission revoke: file:///data/local/tmp/com.iten.itenwired2013
07-12 14:18:22.092 322-345/system_process W/ActivityManager: No content provider found for permission revoke: file:///data/local/tmp/com.iten.itenwired2013
07-12 14:18:22.103 322-345/system_process I/PackageManager: Copying native libraries to /data/app-lib/vmdl511006697
07-12 14:18:22.343 322-323/system_process D/dalvikvm: GC_CONCURRENT freed 603K, 58% free 5579K/13020K, paused 9ms+18ms, total 114ms
07-12 14:18:22.523 322-345/system_process I/PackageManager: Removing non-system package:com.iten.itenwired2013
07-12 14:18:22.523 322-342/system_process I/ActivityManager: Force stopping package com.iten.itenwired2013 appid=10046 user=-1
07-12 14:18:22.533 322-342/system_process I/ActivityManager: Killing proc 951:com.iten.itenwired2013/u0a10046: force stop com.iten.itenwired2013
07-12 14:18:22.533 322-342/system_process W/ActivityManager: Force removing ActivityRecord{40d17e90 u0 com.iten.itenwired2013/.MainActivity}: app died, no saved state
07-12 14:18:22.573 322-335/system_process I/WindowState: WIN DEATH: Window{416e8350 u0 com.iten.itenwired2013/com.iten.itenwired2013.MainActivity}
07-12 14:18:22.833 36-156/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
07-12 14:18:22.862 322-608/system_process W/InputMethodManagerService: Got RemoteException sending setActive(false) notification to pid 951 uid 10046
07-12 14:18:23.793 322-345/system_process I/PackageManager: Package com.iten.itenwired2013 codePath changed from /data/app/com.iten.itenwired2013-1.apk to /data/app/com.iten.itenwired2013-2.apk; Retaining data and using new
07-12 14:18:23.803 322-345/system_process I/PackageManager: Running dexopt on: com.iten.itenwired2013
07-12 14:18:25.242 1315-1315/? D/dalvikvm: DexOpt: load 271ms, verify+opt 815ms, 902996 bytes
07-12 14:18:25.272 322-342/system_process I/ActivityManager: Force stopping package com.iten.itenwired2013 appid=10046 user=-1
07-12 14:18:25.272 322-345/system_process W/PackageManager: Code path for pkg : com.iten.itenwired2013 changing from /data/app/com.iten.itenwired2013-1.apk to /data/app/com.iten.itenwired2013-2.apk
07-12 14:18:25.272 322-345/system_process W/PackageManager: Resource path for pkg : com.iten.itenwired2013 changing from /data/app/com.iten.itenwired2013-1.apk to /data/app/com.iten.itenwired2013-2.apk
07-12 14:18:25.402 322-345/system_process D/PackageManager: New package installed in /data/app/com.iten.itenwired2013-2.apk
07-12 14:18:25.643 322-323/system_process D/dalvikvm: GC_CONCURRENT freed 670K, 57% free 5603K/13020K, paused 8ms+15ms, total 125ms
07-12 14:18:25.653 322-345/system_process I/ActivityManager: Force stopping package com.iten.itenwired2013 appid=10046 user=0
07-12 14:18:25.763 662-662/com.android.launcher D/dalvikvm: GC_EXPLICIT freed 1892K, 31% free 9913K/14264K, paused 5ms+10ms, total 91ms
07-12 14:18:25.933 322-411/system_process I/InputReader: Reconfiguring input devices. changes=0x00000010
07-12 14:18:25.983 322-342/system_process I/ActivityManager: Start proc com.android.keychain for broadcast com.android.keychain/.KeyChainBroadcastReceiver: pid=1317 uid=1000 gids={41000, 1015, 1028, 3002, 3001, 3003}
07-12 14:18:26.083 723-844/com.android.contacts W/AccountTypeManager: No authenticator found for type=com.android.exchange, ignoring it.
07-12 14:18:26.083 723-844/com.android.contacts I/AccountTypeManager: Loaded meta-data for 0 account types, 0 accounts in 8ms(wall) 3ms(cpu)
07-12 14:18:26.153 613-613/android.process.acore D/dalvikvm: GC_EXPLICIT freed 154K, 16% free 2804K/3336K, paused 4ms+5ms, total 354ms
07-12 14:18:26.172 1317-1317/com.android.keychain E/Trace: error opening trace file: No such file or directory (2)
07-12 14:18:26.232 1317-1317/com.android.keychain W/ContextImpl: Calling a method in the system process without a qualified user: android.app.ContextImpl.startService:1352 android.content.ContextWrapper.startService:450 android.content.ContextWrapper.startService:450 com.android.keychain.KeyChainBroadcastReceiver.onReceive:12 android.app.ActivityThread.handleReceiver:2376
07-12 14:18:26.442 322-411/system_process I/InputReader: Reconfiguring input devices. changes=0x00000010
07-12 14:18:26.763 322-402/system_process W/InputMethodManagerService: Found no subtypes in a system IME: com.android.inputmethod.pinyin
07-12 14:18:26.824 723-844/com.android.contacts W/AccountTypeManager: No authenticator found for type=com.android.exchange, ignoring it.
07-12 14:18:26.824 723-844/com.android.contacts I/AccountTypeManager: Loaded meta-data for 0 account types, 0 accounts in 6ms(wall) 2ms(cpu)
07-12 14:18:27.202 322-345/system_process D/dalvikvm: GC_EXPLICIT freed 481K, 58% free 5551K/13020K, paused 16ms+43ms, total 280ms
07-12 14:18:27.232 1304-1304/? D/AndroidRuntime: Shutting down VM
07-12 14:18:27.252 1304-1308/? D/dalvikvm: GC_CONCURRENT freed 94K, 18% free 467K/564K, paused 1ms+1ms, total 14ms
07-12 14:18:27.252 1304-1310/? D/jdwp: Got wake-up signal, bailing out of select
07-12 14:18:27.252 1304-1310/? D/dalvikvm: Debugger has detached; object registry had 1 entries
07-12 14:18:28.203 322-402/system_process W/RecognitionManagerService: no available voice recognition services found for user 0
07-12 14:18:28.213 1333-1333/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
07-12 14:18:28.213 1333-1333/? D/AndroidRuntime: CheckJNI is ON
07-12 14:18:28.322 1333-1333/? D/dalvikvm: Trying to load lib libjavacore.so 0x0
07-12 14:18:28.342 1333-1333/? D/dalvikvm: Added shared lib libjavacore.so 0x0
07-12 14:18:28.412 1333-1333/? D/dalvikvm: Trying to load lib libnativehelper.so 0x0
07-12 14:18:28.412 1333-1333/? D/dalvikvm: Added shared lib libnativehelper.so 0x0
07-12 14:18:29.773 1333-1333/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am
07-12 14:18:29.783 1333-1333/? D/dalvikvm: Note: class Landroid/app/ActivityManagerNative; has 157 unimplemented (abstract) methods
07-12 14:18:29.813 322-571/system_process I/ActivityManager: Force stopping package com.iten.itenwired2013 appid=10046 user=-1
07-12 14:18:29.823 322-571/system_process I/ActivityManager: START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.iten.itenwired2013/.MainActivity} from pid 1333
07-12 14:18:29.853 322-571/system_process W/WindowManager: Failure taking screenshot for (266x425) to layer 21005
07-12 14:18:29.894 1333-1333/? D/AndroidRuntime: Shutting down VM
07-12 14:18:29.913 1333-1337/? D/dalvikvm: GC_CONCURRENT freed 95K, 17% free 502K/600K, paused 1ms+1ms, total 20ms
07-12 14:18:29.913 1333-1339/? D/jdwp: Got wake-up signal, bailing out of select
07-12 14:18:29.913 1333-1339/? D/dalvikvm: Debugger has detached; object registry had 1 entries
07-12 14:18:29.933 1343-1343/com.iten.itenwired2013 D/dalvikvm: Not late-enabling CheckJNI (already on)
07-12 14:18:29.943 322-610/system_process I/ActivityManager: Start proc com.iten.itenwired2013 for activity com.iten.itenwired2013/.MainActivity: pid=1343 uid=10046 gids={50046, 3003, 1028}
07-12 14:18:30.353 36-156/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
07-12 14:18:30.542 1343-1343/com.iten.itenwired2013 E/Trace: error opening trace file: No such file or directory (2)
07-12 14:18:30.622 1343-1343/com.iten.itenwired2013 W/ActivityThread: Application com.iten.itenwired2013 is waiting for the debugger on port 8100...
07-12 14:18:30.763 1343-1343/com.iten.itenwired2013 I/System.out: Sending WAIT chunk
07-12 14:18:30.773 1343-1349/com.iten.itenwired2013 I/dalvikvm: Debugger is active
07-12 14:18:30.973 1343-1343/com.iten.itenwired2013 I/System.out: Debugger has connected
07-12 14:18:30.973 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:31.183 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:31.383 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:31.582 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:31.783 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:31.963 322-342/system_process I/Choreographer: Skipped 40 frames! The application may be doing too much work on its main thread.
07-12 14:18:31.983 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:32.193 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:32.393 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:32.604 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:32.713 322-342/system_process I/Choreographer: Skipped 66 frames! The application may be doing too much work on its main thread.
07-12 14:18:32.742 36-156/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
07-12 14:18:32.803 1343-1343/com.iten.itenwired2013 I/System.out: waiting for debugger to settle...
07-12 14:18:33.003 1343-1343/com.iten.itenwired2013 I/System.out: debugger has settled (1416)
07-12 14:18:33.393 36-67/? I/ARMAssembler: generated scanline__00000077:03515104_00008001_00000000 [113 ipp] (134 ins) at [0x40be3520:0x40be3738] in 1163000 ns
07-12 14:18:34.823 1343-1343/com.iten.itenwired2013 D/dalvikvm: GC_FOR_ALLOC freed 163K, 10% free 2530K/2808K, paused 40ms, total 57ms
07-12 14:18:34.834 1343-1343/com.iten.itenwired2013 I/dalvikvm-heap: Grow heap (frag case) to 3.185MB for 635812-byte allocation
07-12 14:18:34.903 1343-1352/com.iten.itenwired2013 D/dalvikvm: GC_FOR_ALLOC freed 2K, 9% free 3149K/3432K, paused 57ms, total 57ms
07-12 14:18:34.963 1343-1346/com.iten.itenwired2013 D/dalvikvm: GC_CONCURRENT freed <1K, 9% free 3149K/3432K, paused 12ms+4ms, total 62ms
07-12 14:18:34.963 1343-1343/com.iten.itenwired2013 D/dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 51ms
07-12 14:18:34.973 1343-1343/com.iten.itenwired2013 I/dalvikvm-heap: Grow heap (frag case) to 3.661MB for 500416-byte allocation
07-12 14:18:35.023 1343-1352/com.iten.itenwired2013 D/dalvikvm: GC_FOR_ALLOC freed <1K, 8% free 3637K/3924K, paused 50ms, total 50ms
07-12 14:18:36.323 1343-1343/com.iten.itenwired2013 V/AgendaActivity: Created
07-12 14:18:36.423 1343-1343/com.iten.itenwired2013 V/JSON PARSER: 01
07-12 14:18:39.882 322-339/system_process W/ActivityManager: Launch timeout has expired, giving up wake lock!
07-12 14:18:40.453 322-339/system_process W/ActivityManager: Activity idle timeout for ActivityRecord{40d1e810 u0 com.iten.itenwired2013/.MainActivity}
07-12 14:18:42.545 1343-1343/com.iten.itenwired2013 V/AgendaActivity: Exceptionnull
07-12 14:18:42.613 1343-1346/com.iten.itenwired2013 D/dalvikvm: GC_CONCURRENT freed 784K, 22% free 3245K/4144K, paused 6ms+24ms, total 102ms
07-12 14:18:42.862 36-36/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
07-12 14:18:43.363 1343-1343/com.iten.itenwired2013 I/Choreographer: Skipped 693 frames! The application may be doing too much work on its main thread.
07-12 14:18:43.633 1343-1343/com.iten.itenwired2013 D/gralloc_goldfish: Emulator without GPU emulation detected.
07-12 14:18:43.882 322-341/system_process I/ActivityManager: Displayed com.iten.itenwired2013/.MainActivity: +14s4ms
07-12 14:18:44.333 1343-1343/com.iten.itenwired2013 I/Choreographer: Skipped 56 frames! The application may be doing too much work on its main thread.