在android中为JSON响应执行从服务器获取/发布

当使用http get/post时，获取JSON响应的最有效方法是什么。显然，它们必须异步完成

注意：我已经在清单文件中启用了internet权限

张贴：

HttpPost httpPost = new HttpPost("MYDOMAIN");
HttpResponse response = httpClient.execute(httpPost);

获取：

HttpGet httpGet = new HttpGet("MYDOMAIN");
HttpResponse response = httpClient.execute(httpGet);

---

HTTP请求必须异步完成。 首先确保您在AndroidManifest.xml中具有INTERNET权限

然后为请求创建一个类，以便可以重用它

public class Request extends AsyncTask<List<NameValuePair>, Void, String> {


    Callback.JSONCallback callback;
    String url;
    String type;

    public Request(String type, String url, Callback.JSONCallback callback) {
        this.callback = callback;
        extension = url;
        this.type = type;
    }

    // What to do Async, in this case its POST/GET
    protected String doInBackground(List<NameValuePair>... pairs) {

        HttpClient httpClient = new DefaultHttpClient();

        if (type.equals("POST")) {
            HttpPost httpPost = new HttpPost(url);

            try {
                // Add your data
                httpPost.setEntity(new UrlEncodedFormEntity(pairs[0], "UTF-8"));

                // Execute HTTP Post Request
                HttpResponse response = httpClient.execute(httpPost);
                String result = EntityUtils.toString(response.getEntity());

                return result;

            } catch (Exception e) {
                Log.v("error", e.toString());
            }
        } else if (type.equals("GET")) {
            try {
                HttpGet httpGet = new HttpGet(url);
                HttpResponse response = httpClient.execute(httpGet);
                response.getStatusLine().getStatusCode();

                String result = EntityUtils.toString(response.getEntity());

                return result;

            } catch (Exception e) {
                Log.v("error", e.toString());
            }
        }

        return "";

    }

    // What to do after AsyncTask
    protected void onPostExecute(String feed) {
        JSONObject JSON = null;
        try {
            JSON = new JSONObject(feed);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        callback.call(JSON);
    }

}

然后使用POST或GET。服务器应该返回JSON，然后您可以根据需要解析它

List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(2);
// Not manditory, can be used for things like token, etc.
nameValuePairList.add(new BasicNameValuePair("ID", "VALUE"));
new Request("POST", "URL", new Callback.JSONCallback() {
    @Override
    public void call(JSONObject JSON) {
        try {
            // Parse JSON here

        } catch (JSONException e) {
            Log.v("error", e.toString());
        }
    }
}).execute(nameValuePairList);

List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(2);
// Not manditory, can be used for things like token, etc.
nameValuePairList.add(new BasicNameValuePair("ID", "VALUE"));
new Request("GET", "URL", new Callback.JSONCallback() {
    @Override
    public void call(JSONObject JSON) {
        try {
            // Parse JSON here

        } catch (JSONException e) {
            Log.v("error", e.toString());
        }
    }
}).execute(nameValuePairList);

List-nameValuePairList=new-ArrayList（2）；
//不是下颌，可以用来做代币之类的东西。
nameValuePairList.add（新的BasicNameValuePair（“ID”，“VALUE”））；
新请求（“POST”、“URL”、new Callback.JSONCallback（）{
@凌驾
公共void调用（JSONObject JSON）{
试一试{
//在这里解析JSON
}捕获（JSONException e）{
Log.v（“错误”，例如toString（））；
}
}
}).执行（nameValuePairList）；
列表名称ValuePairList=新的ArrayList（2）；
//不是下颌，可以用来做代币之类的东西。
nameValuePairList.add（新的BasicNameValuePair（“ID”，“VALUE”））；
新请求（“GET”，“URL”，new Callback.JSONCallback（）{
@凌驾
公共void调用（JSONObject JSON）{
试一试{
//在这里解析JSON
}捕获（JSONException e）{
Log.v（“错误”，例如toString（））；
}
}
}).执行（nameValuePairList）；

为什么不改为使用？

List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(2);
// Not manditory, can be used for things like token, etc.
nameValuePairList.add(new BasicNameValuePair("ID", "VALUE"));
new Request("POST", "URL", new Callback.JSONCallback() {
    @Override
    public void call(JSONObject JSON) {
        try {
            // Parse JSON here

        } catch (JSONException e) {
            Log.v("error", e.toString());
        }
    }
}).execute(nameValuePairList);

List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(2);
// Not manditory, can be used for things like token, etc.
nameValuePairList.add(new BasicNameValuePair("ID", "VALUE"));
new Request("GET", "URL", new Callback.JSONCallback() {
    @Override
    public void call(JSONObject JSON) {
        try {
            // Parse JSON here

        } catch (JSONException e) {
            Log.v("error", e.toString());
        }
    }
}).execute(nameValuePairList);