[英]Why can't read this json, but Browser can
我不明白為什么我不能閱讀此json鏈接,但瀏覽器Chrome可以閱讀,我嘗試使用其他鏈接,但我閱讀了它們。
我的代碼:
runOnUiThread(new Runnable() {
@Override
public void run() {
new sendToken().execute("http://admin:123@qlvb-snv.newsaigonsoft.com/push-notifications-portlet/api/secure/jsonws/pushnotificationsdevice/add-push-notifications-device?token=cNAXYNQSPHk:APA91bF86THzkPE_ol9euea1M40x6jVgN9RjUOISVtL-UEXDYpAP62aeRnUwkLrSt6z8C4saTJPKW5CJ57VSRmovZ5OBX4NsZg3U-zoDdXB64dWzAQGB7WllGvqGEO3Nt4_Fbg-vUyok&platform=android");
}
});
和我的AsyncTask:
class sendToken extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
return docNoiDung_Tu_URL(params[0]);
}
@Override
protected void onPostExecute(String s) {
Log.d("Respones: ", s + "");
}
}
它沒有任何回應。
像這樣更改您的doInBackground
class sendToken extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... params) {
try {
HttpClient httpclient = getNewHttpClient();
HttpGet httpget = new HttpGet(arg0[0]);
// Execute HTTP get Request
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
String responseString = EntityUtils.toString(entity, "UTF-8");
return responseString;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
Log.d("Respones: ", s);
}
還要將依賴項添加到build.gradle
compile('org.apache.httpcomponents:httpcore:4.4.1') {
exclude group: 'org.apache.httpcomponents', module: 'httpclient'
}
不要忘記添加互聯網權限以顯示
<uses-permission android:name="android.permission.INTERNET"/>
可能有兩件事
您的方法docNoiDung_Tu_URL不正確或編寫正確,或者您無權訪問Internet。
您必須撥打http電話
HttpURLConnection urlConnection = null;
String My_URL = "YOUR URL";
BufferedReader reader = null;
URL url = null;
String Json;
InputStreamReader inputStream1 = null;
InputStream inputStream = null;
里面做背景
@Override
protected String doInBackground(Void... params) {
try {
url = new URL(My_URL);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
if(urlConnection.getResponseCode() == 200)
{
inputStream = urlConnection.getInputStream();
Json = readData(inputStream);
}
else {
urlConnection.getResponseCode();
}
}catch (Exception e){
Json = e.toString();
}
finally {
if (urlConnection!=null)
urlConnection.disconnect();
try {
if (inputStream!=null)
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return Json;
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
// your work
}
public String readData(InputStream inputStream)
{
StringBuilder builder = new StringBuilder();
try {
if (inputStream != null) {
inputStream1 = new InputStreamReader(inputStream);
reader = new BufferedReader(inputStream1);
String line = reader.readLine();
while (line != null) {
builder.append(line);
line = reader.readLine();
}
} else {
Toast.makeText(MainActivity.this, "errorwa", Toast.LENGTH_SHORT).show();
}
}catch (Exception e){}
return builder.toString();
}
您不能直接從URL中讀取響應。
試用以下代碼:
public JSONObject getJSONFromUrl(String url) {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
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;
}
在清單中添加以下權限
<uses-permission android:name="android.permission.INTERNET"/>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.