android如何从网页中获取一个json数组并解析出来，显示在textview里面

1,先要建立一个线程获取json数据

2接着解析json数据

3,设置textview

例如：json数据，strjson= {"key": ["a","b"]}

JSONObject object = new JSONObject (strjson)

JSONArray arr= object.getJSONArray("key")

String text=arr.getString(0)

下面介绍三种获取网页数据的代码

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//第一种

/**获取参数(ArrayList<NameValuePair>nameValuePairs,String url)后post给远程服务器

* 将获得的返回结果(String)返回给调用者

* 本函数适用于查询数量较少的时候

*/

public String posturl(ArrayList<NameValuePair>nameValuePairs,String url){

String result = ""

String tmp= ""

InputStream is = null

try{

HttpClient httpclient = new DefaultHttpClient()

HttpPost httppost = new HttpPost(url)

httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs))

HttpResponse response = httpclient.execute(httppost)

HttpEntity entity = response.getEntity()

is = entity.getContent()

}catch(Exception e){

return "Fail to establish http connection!"

}

try{

BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"))

StringBuilder sb = new StringBuilder()

String line = null

while ((line = reader.readLine()) != null) {

sb.append(line + "\n")

}

is.close()

tmp=sb.toString()

}catch(Exception e){

return "Fail to convert net stream!"

}

try{

JSONArray jArray = new JSONArray(tmp)

for(int i=0i<jArray.length()i++){

JSONObject json_data = jArray.getJSONObject(i)

Iterator<?>keys=json_data.keys()

while(keys.hasNext()){

result += json_data.getString(keys.next().toString())

}

}

}catch(JSONException e){

return "The URL you post is wrong!"

}

return result

}

//第二种

/**获取参数指定的网页代码，将其返回给调用者，由调用者对其解析

* 返回String

*/

public String posturl(String url){

InputStream is = null

String result = ""

try{

HttpClient httpclient = new DefaultHttpClient()

HttpPost httppost = new HttpPost(url)

HttpResponse response = httpclient.execute(httppost)

HttpEntity entity = response.getEntity()

is = entity.getContent()

}catch(Exception e){

return "Fail to establish http connection!"+e.toString()

}

try{

BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"))

StringBuilder sb = new StringBuilder()

String line = null

while ((line = reader.readLine()) != null) {

sb.append(line + "\n")

}

is.close()

result=sb.toString()

}catch(Exception e){

return "Fail to convert net stream!"

}

return result

}

//第三种

/**获取指定地址的网页数据

* 返回数据流

*/

public InputStream streampost(String remote_addr){

URL infoUrl = null

InputStream inStream = null

try {

infoUrl = new URL(remote_addr)

URLConnection connection = infoUrl.openConnection()

HttpURLConnection httpConnection = (HttpURLConnection)connection

int responseCode = httpConnection.getResponseCode()

if(responseCode == HttpURLConnection.HTTP_OK){

inStream = httpConnection.getInputStream()

}

} catch (MalformedURLException e) {

// TODO Auto-generated catch block

e.printStackTrace()

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}

return inStream

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