如何使用android使用REST api [英] How to consume REST api with android

问题描述

我正在尝试创建一个使用android的移动客户端来使用我在eclipse上创建了休息服务器的本地REST API并且它运行没有问题但我正在尝试在android studio上创建我的客户端并且它也在运行但是当我点击按钮没有发生任何事情。



我尝试过：

I am trying to create a mobile client using android to consume a local REST API I have created rest server on eclipse and it is running without problems but i am trying to create my client on android studio and it is running also but when i click on the button nothing is happening.

What I have tried:

public class MainActivity extends AppCompatActivity {
    private Button btnChercher;
    private TextView tvJson;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnChercher = (Button) findViewById(R.id.btnchercher);
        tvJson = (TextView) findViewById(R.id.tvJson);
        btnChercher.setOnClickListener(new View.OnClickListener() {
                                           @Override
                                           public void onClick(View v) {
                                               new JsonTask().execute("http://localhost:8080/membres");
                                           }


                                       }
        );
    }


    public class JsonTask extends AsyncTask<string,string,string>{

        @Override
        protected String doInBackground(String... params) {
            HttpURLConnection connection=null;
            BufferedReader reader=null;

            try {
                URL url = new URL(params[0]);
                connection = (HttpURLConnection) url.openConnection();

                connection.connect();

                InputStream stream = connection.getInputStream();

                reader = new BufferedReader(new InputStreamReader(stream));

                StringBuffer buffer = new StringBuffer();

                String line ="";

                while ((line=reader.readLine())!=null){
                    buffer.append(line);
                }

                String finalJson = buffer.toString();

                JSONObject parentObject = new JSONObject();
                JSONArray parentArray = parentObject.getJSONArray("");
                JSONObject finalObject = parentArray.getJSONObject(0);

                String nomMembre = finalObject.getString("nomMembre");

                return nomMembre+"\n";





            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            } finally {
                if(connection!=null){
                    connection.disconnect();
                }

                if(reader!=null){
                    try {
                        reader.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }


            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            tvJson.setText(result);
        }
    }
}

推荐答案

localhost是当前的主机（Android应用程序），所以你应该用服务器计算机名称或服务器IP替换本地主机。



http：// localhost：8080 / membres替换为http ：// server_ip：8080 / membres



goodluck

Hi,
localhost is current host (android app), so you should replace local host with server computer name or server IP.

http://localhost:8080/membres replace with http://server_ip:8080/membres

goodluck

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