解析数据错误org.json.JSONException:类型java.lang.String类型的错误无法转换为JSONObject

时间:2014-06-12 09:42:30

标签: java php json

不知怎的,这段代码不起作用......有什么建议吗?

import java.util.ArrayList;
import java.util.List;


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


import com.example.androidhive.R;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class EditProductActivity extends Activity {

    EditText txtName;
    EditText txtPrice;
    EditText txtDesc;
    EditText txtCreatedAt;
    Button btnSave;
    Button btnDelete;

    String pid;

    private ProgressDialog pDialog;

    JSONParser jsonParser = new JSONParser();


    private static final String url_product_detials = "http://192.168.2.36/android_connect/get_product_details.php";


    private static final String url_update_product = "http://192.168.2.36/android_connect/update_product.php";


    private static final String url_delete_product = "http://192.168.2.36/android_connect/delete_product.php";


    private static final String TAG_SUCCESS = "success";
    private static final String TAG_PRODUCT = "product";
    private static final String TAG_PID = "pid";
    private static final String TAG_NAME = "name";
    private static final String TAG_PRICE = "price";
    private static final String TAG_DESCRIPTION = "description";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edit_product);


        btnSave = (Button) findViewById(R.id.btnSave);
        btnDelete = (Button) findViewById(R.id.btnDelete);


        Intent i = getIntent();


        pid = i.getStringExtra(TAG_PID);


        new GetProductDetails().execute();


        btnSave.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // starting background task to update product
                new SaveProductDetails().execute();
            }
        });


        btnDelete.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                new DeleteProduct().execute();
            }
        });

    }


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


        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(EditProductActivity.this);
            pDialog.setMessage("Loading product details. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }


        protected String doInBackground(String... params) {


            runOnUiThread(new Runnable() {
                public void run() {

                    int success;
                    try {
                        // Building Parameters
                        List<NameValuePair> params = new ArrayList<NameValuePair>();
                        params.add(new BasicNameValuePair("pid", pid));


                        JSONObject json = jsonParser.makeHttpRequest(
                                url_product_detials, "GET", params);


                        Log.d("Single Product Details", json.toString());


                        success = json.getInt(TAG_SUCCESS);
                        if (success == 1) {

                            JSONArray productObj = json
                                    .getJSONArray(TAG_PRODUCT); // JSON Array


                            JSONObject product = productObj.getJSONObject(0);


                            txtName = (EditText) findViewById(R.id.inputName);
                            txtPrice = (EditText) findViewById(R.id.inputPrice);
                            txtDesc = (EditText) findViewById(R.id.inputDesc);


                            txtName.setText(product.getString(TAG_NAME));
                            txtPrice.setText(product.getString(TAG_PRICE));
                            txtDesc.setText(product.getString(TAG_DESCRIPTION));

                        }else{
                            // product with pid not found
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });

            return null;
        }


        protected void onPostExecute(String file_url) {

            pDialog.dismiss();
        }
    }


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


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


        protected String doInBackground(String... args) {


            String name = txtName.getText().toString();
            String price = txtPrice.getText().toString();
            String description = txtDesc.getText().toString();


            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair(TAG_PID, pid));
            params.add(new BasicNameValuePair(TAG_NAME, name));
            params.add(new BasicNameValuePair(TAG_PRICE, price));
            params.add(new BasicNameValuePair(TAG_DESCRIPTION, description));

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


            try {
                int success = json.getInt(TAG_SUCCESS);

                if (success == 1) {

                    Intent i = getIntent();

                    setResult(100, i);
                    finish();
                } else {

                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }


        protected void onPostExecute(String file_url) {

            pDialog.dismiss();
        }
    }


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


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


        protected String doInBackground(String... args) {


            int success;
            try {

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


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


                Log.d("Delete Product", json.toString());


                success = json.getInt(TAG_SUCCESS);
                if (success == 1) {

                    Intent i = getIntent();

                    setResult(100, i);
                    finish();
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }


        protected void onPostExecute(String file_url) {

            pDialog.dismiss();

        }

    }
}

这是更新产品的PHP代码

<?php




$response = array();


if (isset($_POST['pid']) && isset($_POST['name']) && isset($_POST['price']) && isset($_POST['description'])) {

    $pid = $_POST['pid'];
    $name = $_POST['name'];
    $price = $_POST['price'];
    $description = $_POST['description'];





    $link = mysqli_connect("localhost","tahapan","12345","androidhive") or die("Error " . mysqli_error($link));


    $query = "UPDATE products SET name = '$name', price = '$price', description = '$description' WHERE pid = $pid";
    $result = $link->query($query) or die("Error in the consult.." . mysqli_error($link));


    if ($result) {

        $response["success"] = 1;
        $response["message"] = "Product successfully updated.";


        echo json_encode($response);
    } else {

    }
} else {

    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";


    echo json_encode($response);
}
?>

每次我尝试运行应用程序并执行更新产品..发生错误 我不知道该怎么办... 请帮忙 谢谢你们..

0 个答案:

没有答案