次のようなjson構造があります。
私の json 解析は次のようになります。チュートリアルから編集されているため、少し汚れていますが、これがどのように機能するかを理解したら、クリーンアップします。複数のjsonオブジェクトの配列を持つ1つのjsonオブジェクトがある場合、jsonの解析で少し迷っています。
private class ReadJSONResult extends AsyncTask
<String, Void, String> {
protected String doInBackground(String... urls) {
return readJSONFeed(urls[0]);
}
protected void onPostExecute(String result) {
try {
Log.d("asycTask", "[ Gets into asyc task ]");
///get
Log.d("search", "[ check if we get search results ]");
Log.d("search", "[" + result + "]");
JSONObject jsonObject = new JSONObject(result);
JSONObject weatherObservationItems =
new JSONObject(jsonObject.getString("JSON"));
Toast.makeText(getBaseContext(),
weatherObservationItems.getString("totalResults"),
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Log.d("ReadWeatherJSONFeedTask", e.getLocalizedMessage());
}
}
}
//gets the json from the inputed url
public String readJSONFeed(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("JSON", "Failed to download file");
}
} catch (Exception e) {
Log.d("readJSONFeed", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
ログから結果変数を出力し、jsonを取得したため、jsonの結果を取得していることはわかっています。
アップデート：
ログを見ると、さらに混乱します。結果変数を出力すると、これが得られます
06-13 14:56:00.533: D/asycTask(19191): [ Gets into asyc task ]
06-13 14:56:00.533: D/search(19191): [ check if we get search results ]
06-13 14:56:00.541: D/search(19191): [{"currentPage":1,"numberOfPages":1,"totalResults":8,"data":[{"id":"YAKFea","name":"90 Shilling","description":"We introduced 90 Shilling, our flagship beer, at our opening party in 1989. For a while, we\u2019d been wondering what would happen if we lightened up the traditional Scottish ale? The result is an irresistibly smooth and delicious medium-bodied amber ale. The name 90 Shilling comes from the Scottish method of taxing beer. Only the highest quality beers were taxed 90 Shillings. A shilling was a British coin used from 1549 to 1982. We think you\u2019ll find this original ale brilliantly refreshing, and worth every shilling.","abv":"5.3","ibu":"27","glasswareId":4,"availableId":1,"styleId":9,"isOrganic":"N","labels":{"icon":"http:\/\/s3.amazonaws.com\/brewerydbapi\/beer\/YAKFea\/upload_1CxY2l-icon.png","medium":"http:\/\/s3.amazonaws.com\/brewerydbapi\/beer\/YAKFea\/upload_1CxY2l-medium.png","large":"http:\/\/s3.amazonaws.com\/brewerydbapi\/beer\/YAKFea\/upload_1CxY2l-large.png"},"status":"verified","statusDisplay":"Verified","createDate":"2012-01-03 02:42:38","updateDate":"2012-03-22 13:04:31","glass":{"id":4,"name":"Pilsner","createDate":"2012-01-03 02:41:33"},"available":{"id":"1","name":"Year Round","description":"Available year round as a staple beer."},"style":{"id":9,"categoryId":1,"category":{"id":1,"name":"British Origin Ales","createDate":"2012-03-21 20:06:45"},"name":"Scottish-Style Export Ale","description":"The overriding character of Scottish export ale is sweet, caramel-like, and malty. Its bitterness is perceived as low to medium. Hop flavor or aroma should not be perceived. It has medium body. Fruity-ester character may be apparent. Yeast characters such as diacetyl (butterscotch) and sulfuriness are acceptable at very low levels. The color will range from golden amber to deep brown. Bottled versions of this traditional draft beer may contain higher amounts of carbon dioxide than is typical for mildly carbonated draft versions. Chill haze is acceptable at low temperatures. Though there is little evidence suggesting that traditionally made Scottish-style export ales exhibited peat smoke character, the current marketplace offers many Scottish-style export ales with peat or smoke character present at low to medium levels. Thus a peaty\/smoky character may be evident at low to medium levels (ales with medium-high or higher smoke character would be considered a smoke flavored beer and considered in another category). Scottish-style export ales may be split into two subcategories: Traditional (no smoke character) and Peated (low level of peat smoke character).","ibuMin":"15","ibuMax":"25","abvMin":"4","abvMax":"5.3","srmMin":"10","srmMax":"19","ogMin":"1.04","fgMin":"1.01","fgMax":"1.018","createDate":"2012-03-21 20:06:45"},"breweries":[{"id":"rQkKIB","name":"Odell Brewing Company","description":"We love beer. We talk about beer. We dream about beer. And we make incredible beer. We don't mess around with serving food, making music or cutting up limes to mask our beer's flavor. Our dreams lead us to create imaginative, big, bold and beautiful beers. Every ounce of our passion is poured directly into the next bottle you open. Our mission is simple; to make consistently great beer.\r\n\r\nHandcrafted classics and small batch experimental beers that include Pale Ales, Stouts, Pilsners and Porters. Come visit us in our tap room for a taste of how we keep the craft in craft beer.","website":"http:\/\/odellbrewing.com\/","established":"1989","isOrganic":"N","images":{"icon":"http:\/\/s3.amazonaws.com\/brewerydbapi\/brewery\/rQkKIB\/upload_DXbWkA-icon.png","medium":"http:\/\/s3.amazonaws.com\/brewerydbapi\/brewery\/rQkKIB\/upload_DXbWkA-medium.png","large":"http:\/\/s3.amazonaws.com\/brewerydbapi\/brewery\/rQkKIB\/upload_DXbWkA-large.png"},"status":"verified","statusDisplay":"Verified","createDate":"2012-01-03 02:42:04","updateDate":"2012-03-27 01:06:32","locations":[{"id":"Q4eTmd","name":"Main Brewery","streetAddress":"800 East Lincoln Avenue","locality":"Fort Collins","region":"C
しかし、次の行がログに出力されるため、try catch に失敗したように見えます。
06-13 14:56:00.580: D/ReadWeatherJSONFeedTask(19191): No value for JSON