我正在开发 android app ，我想通过使用http GET 知道如何从Json对象获取数据请求网址是APIary）
这是我第一次使用Json和httpRequests，所以我不知道这个所需的语法
这是我的HttpRequest课程，我正在使用：
public abstract class HttpRequest extends AsyncTask<String, String, String> {
private HttpClient httpClient;
private HttpRequestBase request;
private boolean hasError = false;
private String errorMessage = null;
private boolean hasBody = false;
private int statusCode;
public HttpRequest(){
httpClient = new DefaultHttpClient();
}
/**
* This method is called from the subclasses to pass the request method used to this class
* @param request , The request class passed from the subclass
*/
void setMethod(HttpRequestBase request){
this.request = request;
}
/**
* Adds a header to the current request
* @param header , header key
* @param value , header value
*/
public void addHeader(String header,String value){
this.request.addHeader(header, value);
}
/**
* @return false if the status code was anything other than 2XX after executing the request , true otherwise
*/
public boolean hasError() {
return hasError;
}
/**
* A getter for the error message
* @return String the error message returned from the request if any
*/
public String getErrorMessage() {
return errorMessage;
}
/**
* This is the method responsible for executing the request and handling the response
* @return String , The response body , null in case of errors
*/
@Override
protected String doInBackground(String... args) {
if(hasBody){
this.request.addHeader("content-type", "application/json");
}
ResponseHandler<String> handler = new BasicResponseHandler();
HttpResponse x = null;
try{
x = httpClient.execute(this.request);
this.statusCode = x.getStatusLine().getStatusCode();
return handler.handleResponse(x);
}catch(ClientProtocolException e ){
hasError = true;
errorMessage = e.getMessage();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
/**
* A getter method for the status code
* @return int , the status code of executing the request
*/
public int getStatusCode(){
return this.statusCode;
}
/**
* A setter method to set whether the request has a body or not , used between this class and its subclasses
* @param hasBody boolean
*/
void setHasBody(boolean hasBody){
this.hasBody = hasBody;
}
}