我需要接收以下 Json 的“提取”部分：https ://en.wikipedia.org/w/api.php ? format = json & action = query & prop = extracts & exintro & explaintext & redirects =1& titles = turkey使用我當前的代碼，我收到了整個 Json 并且不知道如何繼續：public class MainActivity extends AppCompatActivity {private Button btnSendRequest;private TextView tvText;private RequestQueue mRequestQueue;private StringRequest stringRequest;private JsonObjectRequest jsonObjectRequest;private String url = "https://de.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro&explaintext&redirects=1&titles=ilmenau";@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnSendRequest = (Button) findViewById(R.id.btnSendRequest); tvText = (TextView) findViewById(R.id.tvText); btnSendRequest.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //send request and print the response using volley library sendRequestAndPrintResponse(); } });}private void sendRequestAndPrintResponse() { mRequestQueue = Volley.newRequestQueue(this); JsonObjectRequest jsonObjectRequest = new JsonObjectRequest (Request.Method.GET, url, null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { tvText.setText("Response : " + response.toString()); // Log.i(TAG,"Response : " + response.toString()); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { tvText.setText("Error : " + error.toString()); //Log.i(TAG,"Error : " + error.toString()); } }); mRequestQueue.add(jsonObjectRequest);}}所以目前我正在獲取整個 Json，但我只需要獲取 Json 的“提取”部分。誰能幫我？
3 回答
慕妹3146593
TA貢獻1820條經驗 獲得超9個贊
試試這個
try {
JSONObject jsonObject = new JSONObject(response.toString());
Iterator < String > keys = jsonObject.keys();
while (keys.hasNext()) {
String key = keys.next();
String value = jsonObject.getString(key);
Log.v("key", key);
Log.v("value", value);
if (key.equals("query")) {
JSONObject jsonObject1 = new JSONObject(jsonObject.getString(key));
Iterator < String > keysinner = jsonObject1.keys();
while (keysinner.hasNext()) {
String key1 = keysinner.next();
String value1 = jsonObject1.getString(key1);
Log.e("key1", key1);
Log.e("value1", value1);
if (key1.equals("pages")) {
JSONObject jsonObject2 = new JSONObject(jsonObject1.getString(key1));
Iterator < String > keyPagenumber = jsonObject2.keys();
while (keyPagenumber.hasNext()) {
String keyPageNumber = keyPagenumber.next();
String valuePagenumber = jsonObject2.getString(keyPageNumber);
Log.e("Pages key :", keyPageNumber);
Log.e("Pages value :", valuePagenumber);
if (key1.equals("pages")) {
JSONObject jsonObjectPages = new JSONObject(jsonObject2.getString(keyPageNumber));
Iterator < String > keyPages = jsonObjectPages.keys();
while (keyPages.hasNext()) {
String keyPageDetail = keyPages.next();
String valuePageDetail = jsonObjectPages.getString(keyPageDetail);
Log.e("PagesDetail key :", keyPageDetail);
Log.e("PagesDetail value :", valuePageDetail);
}
}
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
輸出
三國紛爭
TA貢獻1804條經驗 獲得超7個贊
要提取一塊 JSON 對象（另一個 JSON 對象、整數、字符串等），您不必使用任何外部庫，如 GSON。您可以使用以下代碼管理它。
JSONObject jObj = new JSONObject(response);
String InterestString = jObj.getJSONObject("local").getString("interests");
千巷貓影
TA貢獻1829條經驗 獲得超7個贊
就像是
JSONObject pages = response.getJSONObject("query").getJSONObject("pages");
JSONObject firstPage = pages.getJSONObject(pages.names().get(0));
String extract = firstPage.getString("extract");
應該管用。
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