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我有一個致命的異常：AsyncTask＃1在下面的部分，但不知道爲什麼。致命的異常：AsyncTask＃1
/**
* getting Charts from URL
* */
protected String doInBackground(String... args) {
// Building Parameters
ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_read, "POST", params);
// Check your log cat for JSON response
Log.d("Charts: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
JSONArray charts = json.getJSONArray(TAG_CHARTS);
// looping through All Products
for(int i=0;i<charts.length();i++) {
JSONObject json_data = charts.getJSONObject(i);
String id = json_data.getString("id");
String interpret = json_data.getString("interpret");
String titel = json_data.getString("titel");
String album = json_data.getString("album");
String albumcover = json_data.getString("albumcover");
String likes = json_data.getString("likes");
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_ID, id);
map.put(TAG_INTERPRET, interpret);
map.put(TAG_TITEL, titel);
map.put(TAG_ALBUM, album);
map.put(TAG_ALBUMCOVER, albumcover);
map.put(TAG_LIKES, likes);
songslist.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
CreateSong.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
這是我的第一個問題。希望你知道該怎麼做。我從數據庫獲取數據並將它們放入一個JSON數組中，然後放入一個HashMap中，但似乎錯誤是由JSON引起的。
編輯：LOG CAT
07-11 23:20:48.320: D/CLIPBOARD(13241): Hide Clipboard dialog at Starting input: finished by someone else... !
07-11 23:20:52.510: D/dalvikvm(13241): GC_FOR_ALLOC freed 139K, 3% free 9004K/9223K, paused 13ms
07-11 23:20:52.650: E/JSON Parser(13241): Error parsing data org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
07-11 23:20:52.650: W/dalvikvm(13241): threadid=11: thread exiting with uncaught exception (group=0x40c331f8)
07-11 23:20:52.675: E/AndroidRuntime(13241): FATAL EXCEPTION: AsyncTask #1
07-11 23:20:52.675: E/AndroidRuntime(13241): java.lang.RuntimeException: An error occured while executing doInBackground()
07-11 23:20:52.675: E/AndroidRuntime(13241): at android.os.AsyncTask$3.done(AsyncTask.java:278)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.lang.Thread.run(Thread.java:856)
07-11 23:20:52.675: E/AndroidRuntime(13241): Caused by: java.lang.NullPointerException
07-11 23:20:52.675: E/AndroidRuntime(13241): at de.andreasgloeckner.ShowCharts$LoadAllProducts.doInBackground(ShowCharts.java:172)
07-11 23:20:52.675: E/AndroidRuntime(13241): at de.andreasgloeckner.ShowCharts$LoadAllProducts.doInBackground(ShowCharts.java:1)
07-11 23:20:52.675: E/AndroidRuntime(13241): at android.os.AsyncTask$2.call(AsyncTask.java:264)
07-11 23:20:52.675: E/AndroidRuntime(13241): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-11 23:20:52.675: E/AndroidRuntime(13241): ... 4 more
您需要共享異常堆棧跟蹤和來自logcat的輸出。這是權威:)。其他一切都是猜測。 – Anirudh 2012-07-11 21:10:51
Srsly，我有這個網站的一些問題...什麼是最好的可能性添加日誌貓？當我編輯我的帖子時，它看起來很奇怪，正如你所看到的。 – Andy 2012-07-11 21:27:06