如何從Modle Web服務獲取令牌？

Question

package com.exmple.moodle_webservice;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

    Button token;

    JSONParser jParser = new JSONParser();

    // Progress Dialog
        private ProgressDialog pDialog;

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

        token=(Button)findViewById(R.id.button1);

        token.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                String result = null;

                try {

                    result = new getToken().execute("").get();

                }
                catch (Exception e) {
                    // TODO Auto-generated catch block
                    Log.e("Error--->",e.toString());
                }

                Log.e("result--->",result);

            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }



class getToken extends AsyncTask<String, String, String> {


    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MainActivity.this);
        pDialog.setMessage("Loading products. Please wait...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }

    @Override
    protected String doInBackground(String... arg0) {
        // TODO Auto-generated method stub

        String getToken = "http://10.0.2.2:80/moodle/login/token.php";

    //String getToken = "http://localhost/moodle/login/token.php?                   username=niranga&password=S12345s@&service=moodle_mobile_app";



        // Building Parameters
         List<NameValuePair> params = new ArrayList<NameValuePair>();

        params.add(new BasicNameValuePair("username", "niranga"));
         params.add(new BasicNameValuePair("password", "S12345s@"));
         params.add(new BasicNameValuePair("service", "moodle_mobile_app"));


                    // getting JSON string from URL
         JSONObject json = jParser.makeHttpRequest(getToken, "GET", params);

         Log.e("json--->",json.toString());

         try {

            return json.getString("token");

        } catch (Exception e) {

            // TODO Auto-generated catch block
            Log.e("Errorrr--->",e.toString());

        }

        return null;

    }

    protected void onPostExecute(String file_url) {
        // dismiss the dialog after getting all products
        pDialog.dismiss();

    }


}
}

我的JSONParser類：

package com.exmple.moodle_webservice;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    // constructor
    public JSONParser() {

    }

    // function get json from url
    // by making HTTP POST or GET method
    public JSONObject makeHttpRequest(String url, String method,
            List<NameValuePair> params) {

        // Making HTTP request
                       try {

            // check for request method
            if(method == "POST"){
                // request method is POST
                // defaultHttpClient
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);
                httpPost.setEntity(new UrlEncodedFormEntity(params));

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();

            }else if(method == "GET"){
                // request method is GET
                DefaultHttpClient httpClient = new DefaultHttpClient();
                String paramString = URLEncodedUtils.format(params, "utf-8");
                url += "?" + paramString;
                HttpGet httpGet = new HttpGet(url);

                HttpResponse httpResponse = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();

                //Log.e("get Entity result--->",is.toString());
            }           



        } catch (Exception e) {

            Log.e("Error-------->>>",e.toString());
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

    }
}

當我嘗試從moodle Webservice獲取令牌時，出現錯誤：

LogCat

03-17 05:21:22.285: E/json--->(2008): {"stacktrace":null,"error":"Invalid url or port.","debuginfo":null,"errorcode":null}
03-17 05:21:22.295: E/Errorrr--->(2008): org.json.JSONException: No value for token
03-17 05:21:22.335: E/AndroidRuntime(2008): FATAL EXCEPTION: main
03-17 05:21:22.335: E/AndroidRuntime(2008): java.lang.NullPointerException: println needs a message
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.util.Log.println_native(Native Method)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.util.Log.e(Log.java:231)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at com.exmple.moodle_webservice.MainActivity$1.onClick(MainActivity.java:64)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.view.View.performClick(View.java:4202)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.view.View$PerformClick.run(View.java:17340)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.os.Handler.handleCallback(Handler.java:725)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.os.Handler.dispatchMessage(Handler.java:92)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.os.Looper.loop(Looper.java:137)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at android.app.ActivityThread.main(ActivityThread.java:5039)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at java.lang.reflect.Method.invokeNative(Native Method)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at java.lang.reflect.Method.invoke(Method.java:511)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-17 05:21:22.335: E/AndroidRuntime(2008):     at dalvik.system.NativeStart.main(Native Method)

我如何從穆德勒獲得令牌？

Answer 1

清除在moodle中創建Web服務令牌的步驟。

請輸入上述網址。 回復以獲取更多信息。

Answer 2

我有同樣的問題。 要解決它，我必須在Moodle根文件夾（在我的情況下為/var/www/moodle/config.php ，在Ubuntu 12.10上）的config.php文件中編輯以下行：

$CFG->wwwroot   = 'http://10.0.2.2/moodle';

您必須使用設備將其作為Moodle Web服務器主機的IP地址（對於仿真器，主機位於10.0.2.2）。