java - 运行时的 json 解析错误

Question

我正在尝试从我的 Android 应用程序向 php 服务器发送一些注册信息。

我有两个类:RegisterActivity 和 JSONParser。当我尝试运行这个程序时，出现了一些这样的错误:

解析数据时出错 org.json.JSONException: Value not of type java.lang.String cannot be converted to JSONObject"and "android.os.AsyncTask$3.done(AsyncTask.java:299)

这是我的代码:

RegisterActivity.java

public class RegisterActivity extends Activity {

    private ProgressDialog pDialog;

    JSONParser jsonParser = new JSONParser();
    EditText username;
    EditText email;
    EditText password;
    EditText RePass;

    private static String url_create_product = "http://oranz.co/pmdtest/index.php";

            private static final String TAG_SUCCESS = "sucess";
            @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set View to register.xml
        setContentView(R.layout.register);
        Button registerscreen=(Button)findViewById(R.id.btnCntnueRegister);
        // Listening to Login Screen link

        email = (EditText)findViewById(R.id.reg_email);
        password =(EditText)findViewById(R.id.reg_password);
        username =(EditText)findViewById(R.id.reg_username);
        RePass = (EditText)findViewById(R.id.rereg_password);
        EditText passwords=(EditText)findViewById(R.id.reg_password);
        passwords.setTransformationMethod(new PasswordTransformationMethod());
        EditText repasswords = (EditText) findViewById(R.id.rereg_password);
        repasswords.setTransformationMethod(new PasswordTransformationMethod());



        registerscreen.setOnClickListener(new View.OnClickListener(){

            public void onClick(View arg0) {

                Context context = getApplicationContext();
                int duration = Toast.LENGTH_SHORT;
                if(email.getText().toString().equals("")&&password.getText().toString().equals("")&&username.getText().toString().equals("")&&RePass.getText().toString().equals(""))
                {                                        
                    Toast toast = Toast.makeText(context, "Please Enter a valed data. !", duration);       
                    toast.show();
                }
                else if(email.getText().toString().equals("")||password.getText().toString().equals("")||username.getText().toString().equals("")||RePass.getText().toString().equals(""))
                {
                    Toast toast = Toast.makeText(context, "Please check any field is blank. !", duration);       
                    toast.show();
                }
                else if(password.getText().toString().compareTo(RePass.getText().toString())==0)
                {
                Intent k = new Intent(getApplicationContext(), ContinueRegister.class);
                startActivity(k);

                new CreateNewUser().execute();

                }
                else
                {
                    Toast toast = Toast.makeText(context, "Password matching is failed. !", duration);       
            toast.show();


                }
            }
            });
      TextView loginScreen = (TextView) findViewById(R.id.link_to_login);

      loginScreen.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent m = new Intent(getApplicationContext(),LoginActivity.class);
            startActivity(m);

        }
    });
    }
            class CreateNewUser extends AsyncTask<String, String, String> {

@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(RegisterActivity.this);
pDialog.setMessage("Creating Product..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}

protected String doInBackground(String... args) {
String Username = username.getText().toString();
String Email = email.getText().toString();
String Password = password.getText().toString();

List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("Username", Username));
params.add(new BasicNameValuePair("Email", Email));
params.add(new BasicNameValuePair("Password",Password));


// getting JSON Object
// Note that create product url accepts POST method

JSONObject json = jsonParser.makeHttpRequest(url_create_product,
"POST", params);

// check log cat fro response
Log.d("Create Response", json.toString());                  
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);

if (success == 1) {
// successfully created user
Intent i = new Intent(getApplicationContext(),FinishSignupActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create user
}
} catch (JSONException e) {
e.printStackTrace();
}

return null;
                    }

                /**
                 * After completing background task Dismiss the progress dialog
                 * **/
                protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
                }
            }
}

JSONParser.java:

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();
            }           


        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        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;

    }
}

Answer 1

这是由于android模拟器崩溃导致程序没有错误