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package
com.example.testjsonandget;import
java.io.BufferedReader;import
java.io.InputStreamReader;import
java.util.ArrayList;import
java.util.HashMap;import
java.util.List;import
java.util.Map;import
org.apache.http.HttpEntity;import
org.apache.http.HttpResponse;import
org.apache.http.HttpStatus;import
org.apache.http.NameValuePair;import
org.apache.http.client.HttpClient;import
org.apache.http.client.entity.UrlEncodedFormEntity;import
org.apache.http.client.methods.HttpGet;import
org.apache.http.client.methods.HttpPost;import
org.apache.http.client.params.HttpClientParams;import
org.apache.http.impl.client.DefaultHttpClient;import
org.apache.http.message.BasicNameValuePair;import
org.apache.http.params.BasicHttpParams;import
org.apache.http.params.HttpConnectionParams;import
org.apache.http.params.HttpParams;import
org.json.JSONArray;import
org.json.JSONObject;import
android.app.Activity;import
android.os.Bundle;public
class
MainActivity extends
Activity { private
final
String uriString="your
url"; @Override public
void
onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //服務器返回的JSON數據 JSONObject
jsonObject=this.getJSONObjectByGet(); try
{ //從JSON中得到字符串 String
apiString=jsonObject.getString("api"); String
countString=jsonObject.getString("count"); System.out.println("apiString="+apiString+",countString="+countString); //從JSON中得到JSONArray,並且遍歷 JSONArray
jsonArray=jsonObject.getJSONArray("data"); for
(int
i = 0;
i < jsonArray.length(); i++) { JSONObject
everyJsonObject=jsonArray.getJSONObject(i); String
category_id=everyJsonObject.getString("category_id"); String
category_name=everyJsonObject.getString("category_name"); String
category_rgb=everyJsonObject.getString("category_rgb"); String
category_news_count=everyJsonObject.getString("category_news_count"); System.out.println("category_id="+category_id+",category_name="+category_name+ ",category_rgb="+category_rgb+",category_news_count="+category_news_count); System.out.println("====================================================="); } } catch
(Exception e) { e.printStackTrace(); } } //得到HttpClient public
HttpClient getHttpClient(){ HttpParams
mHttpParams=new
BasicHttpParams(); //設置網絡鏈接超時 //即:Set
the timeout in milliseconds until a connection is established. HttpConnectionParams.setConnectionTimeout(mHttpParams, 20*1000); //設置socket響應超時 //即:in
milliseconds which is the timeout for waiting for data. HttpConnectionParams.setSoTimeout(mHttpParams, 20*1000); //設置socket緩存大小 HttpConnectionParams.setSocketBufferSize(mHttpParams, 8*1024); //設置是否可以重定向 HttpClientParams.setRedirecting(mHttpParams, true); HttpClient
httpClient=new
DefaultHttpClient(mHttpParams); return
httpClient; } //得到JSONObject(Get方式) public
JSONObject getJSONObjectByGet(){ JSONObject
resultJsonObject=null; if
("".equals(uriString)||uriString==null)
{ return
null; } HttpClient
httpClient=this.getHttpClient(); StringBuilder
urlStringBuilder=new
StringBuilder(uriString); StringBuilder
entityStringBuilder=new
StringBuilder(); //利用URL生成一個HttpGet請求 HttpGet
httpGet=new
HttpGet(urlStringBuilder.toString()); BufferedReader
bufferedReader=null; HttpResponse
httpResponse=null; try
{ //HttpClient發出一個HttpGet請求 httpResponse=httpClient.execute(httpGet); } catch
(Exception e) { e.printStackTrace(); } //得到httpResponse的狀態響應碼 int
statusCode=httpResponse.getStatusLine().getStatusCode(); if
(statusCode==HttpStatus.SC_OK) { //得到httpResponse的實體數據 HttpEntity
httpEntity=httpResponse.getEntity(); if
(httpEntity!=null)
{ try
{ bufferedReader=new
BufferedReader (new
InputStreamReader(httpEntity.getContent(), "UTF-8"), 8*1024); String
line=null; while
((line=bufferedReader.readLine())!=null)
{ entityStringBuilder.append(line+"/n"); } //利用從HttpEntity中得到的String生成JsonObject resultJsonObject=new
JSONObject(entityStringBuilder.toString()); } catch
(Exception e) { e.printStackTrace(); } } } return
resultJsonObject; } //----------------------------------------以下爲POST請求 //準備進行POST請求的參數，一般而言將這些參數封裝在HashMap中 public
JSONObject save(String title, String timelength) throws
Exception{ Map<String,String>
paramsHashMap = new
HashMap<String, String>(); paramsHashMap.put("title",
title); paramsHashMap.put("timelength",
timelength); paramsHashMap.put("method", "save"); String
path = "your
url"; return
getJSONObjectByPost(path, paramsHashMap, "UTF-8"); } //得到JSONObject(Post方式) //此方法此處未調用測試 public
JSONObject getJSONObjectByPost(String path,Map<String, String> paramsHashMap, String encoding) { JSONObject
resultJsonObject = null; List<NameValuePair>
nameValuePairArrayList = new
ArrayList<NameValuePair>(); //
將傳過來的參數填充到List<NameValuePair>中 if
(paramsHashMap != null
&& !paramsHashMap.isEmpty()) { for
(Map.Entry<String, String> entry : paramsHashMap.entrySet()) { nameValuePairArrayList.add(new
BasicNameValuePair(entry.getKey(), entry.getValue())); } } UrlEncodedFormEntity
entity = null; try
{ //
利用List<NameValuePair>生成Post請求的實體數據 //
此處使用了UrlEncodedFormEntity!!! entity
= new
UrlEncodedFormEntity(nameValuePairArrayList, encoding); HttpPost
httpPost = new
HttpPost(path); //
爲HttpPost設置實體數據 httpPost.setEntity(entity); HttpClient
httpClient = this.getHttpClient(); //
HttpClient發出Post請求 HttpResponse
httpResponse = httpClient.execute(httpPost); if
(httpResponse.getStatusLine().getStatusCode() == 200)
{ //
得到httpResponse的實體數據 HttpEntity
httpEntity = httpResponse.getEntity(); if
(httpEntity != null)
{ try
{ BufferedReader
bufferedReader = new
BufferedReader( new
InputStreamReader(httpEntity.getContent(),"UTF-8"), 8
* 1024); StringBuilder
entityStringBuilder = new
StringBuilder(); String
line = null; while
((line = bufferedReader.readLine()) != null)
{ entityStringBuilder.append(line
+ "/n"); } //
利用從HttpEntity中得到的String生成JsonObject resultJsonObject
= new
JSONObject(entityStringBuilder.toString()); } catch
(Exception e) { e.printStackTrace(); } } } } catch
(Exception e) { e.printStackTrace(); } return
resultJsonObject; }} |