java - Android Http 请求 POST JSON

Question

我正在尝试创建一个函数来发出请求，但它给出了一些错误，我已经向互联网授予了权限，但仍然

这是我的代码:

public String request(String Url,JSONObject Data){
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(Url);
        InputStream inputstream;
        String content = "";


            try {

                httppost.setEntity(new StringEntity(Data.toString()));
                HttpResponse response = httpclient.execute(httppost);
                HttpEntity entity = response.getEntity();
          while(true){
              if(entity != null){
                  inputstream =   entity.getContent();
                  content = inputstream.toString();
                  break;
              }
          }

        } catch (Exception ex) {
            return ex.toString();
        } 

        return content;
}

输入:

JSONObject data = new JSONObject();
data.put("teste","teste");
String response = request('urlExample',data);
Toast.makeText(getApplicationContext(),response,Toast.LENGTH_SHORT).show();

输出:

android.os.NetworkOnMainThreadExecption

Answer 1

我建议您使用 AsyncTask，正如我在评论中提到的:

private class LongOperation extends AsyncTask<Void, Void, String> {

        private String mUrl;
        private JSONObject mData;

        public LongOperation(String url, JSONObject data) {
           mUrl = url;
           mData = data;
        }

        @Override
        protected String doInBackground(Void... params) {
            return request(mUrl, mData);
        }

        @Override
        protected void onPostExecute(String response) {
           Toast.makeText(getApplicationContext(),response,
              Toast.LENGTH_SHORT).show();
        }

        @Override
        protected void onPreExecute() {}

        @Override
        protected void onProgressUpdate(Void... values) {}
}

您可以按如下方式启动 AsyncTask:

JSONObject data = new JSONObject();
data.put("teste","teste");
new LongOperation('urlExample', data).execute();