http post-android應用

Question

我應該建立一個連接到服務器，通過php腳本使用http post從數據庫獲取數據。 我正在爲Android做一個應用程序。 你能告訴我一個網站，我可以直接下載源代碼來嘗試嗎？

Answer 1

我可以在下面爲您提供一個樣本。

這是你需要從數據庫

<?php 

/* 
* Following code will list all the products 
*/ 

// array for JSON response 
$response = array(); 


// include db connect class 
require_once __DIR__ . '/db_connect.php'; 

// connecting to db 
$db = new DB_CONNECT(); 

// get all products from products table 
$result = mysql_query("SELECT *FROM products") or die(mysql_error()); 

// check for empty result 
if (mysql_num_rows($result) > 0) { 
// looping through all results 
// products node 
$response["products"] = array(); 

while ($row = mysql_fetch_array($result)) { 
    // temp user array 
    $product = array(); 
    $product["pid"] = $row["pid"]; 
    $product["name"] = $row["name"]; 
    $product["price"] = $row["price"]; 
    $product["description"] = $row["description"]; 
    $product["created_at"] = $row["created_at"]; 
    $product["updated_at"] = $row["updated_at"]; 



    // push single product into final response array 
    array_push($response["products"], $product); 
} 
// success 
$response["success"] = 1; 

// echoing JSON response 
echo json_encode($response); 
} else { 
// no products found 
$response["success"] = 0; 
$response["message"] = "No products found"; 

// echo no users JSON 
echo json_encode($response); 
} 
?> 

更改代碼，以您的需求

，然後針對Android

public class AllProductsActivity extends ListActivity { 

// Progress Dialog 
private ProgressDialog pDialog; 

// Creating JSON Parser object 
JSONParser jParser = new JSONParser(); 

ArrayList<HashMap<String, String>> productsList; 

// url to get all products list 
private static String url_all_products = "http://10.0.2.2/android_connect/get_all_products.php"; 

// JSON Node names 
private static final String TAG_SUCCESS = "success"; 
private static final String TAG_PRODUCTS = "products"; 
private static final String TAG_PID = "pid"; 
private static final String TAG_NAME = "name"; 

// products JSONArray 
JSONArray products = null; 

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

    // Hashmap for ListView 
    productsList = new ArrayList<HashMap<String, String>>(); 

    // Loading products in Background Thread 
    new LoadAllProducts().execute(); 

    // Get listview 
    ListView lv = getListView(); 

    // on seleting single product 
    // launching Edit Product Screen 
    lv.setOnItemClickListener(new OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      // getting values from selected ListItem 
      String pid = ((TextView) view.findViewById(R.id.pid)).getText() 
        .toString(); 

      // Starting new intent 
      Intent in = new Intent(getApplicationContext(), 
        EditProductActivity.class); 
      // sending pid to next activity 
      in.putExtra(TAG_PID, pid); 

      // starting new activity and expecting some response back 
      startActivityForResult(in, 100); 
     } 
    }); 

} 

// Response from Edit Product Activity 
@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    // if result code 100 
    if (resultCode == 100) { 
     // if result code 100 is received 
     // means user edited/deleted product 
     // reload this screen again 
     Intent intent = getIntent(); 
     finish(); 
     startActivity(intent); 
    } 

} 

/** 
* Background Async Task to Load all product by making HTTP Request 
* */ 
class LoadAllProducts extends AsyncTask<String, String, String> { 

    /** 
    * Before starting background thread Show Progress Dialog 
    * */ 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(AllProductsActivity.this); 
     pDialog.setMessage("Loading products. Please wait..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(false); 
     pDialog.show(); 
    } 

    /** 
    * getting All products from url 
    * */ 
    protected String doInBackground(String... args) { 
     // Building Parameters 
     List<NameValuePair> params = new ArrayList<NameValuePair>(); 
     // getting JSON string from URL 
     JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params); 

     // Check your log cat for JSON reponse 
     Log.d("All Products: ", json.toString()); 

     try { 
      // Checking for SUCCESS TAG 
      int success = json.getInt(TAG_SUCCESS); 

      if (success == 1) { 
       // products found 
       // Getting Array of Products 
       products = json.getJSONArray(TAG_PRODUCTS); 

       // looping through All Products 
       for (int i = 0; i < products.length(); i++) { 
        JSONObject c = products.getJSONObject(i); 

        // Storing each json item in variable 
        String id = c.getString(TAG_PID); 
        String name = c.getString(TAG_NAME); 

        // creating new HashMap 
        HashMap<String, String> map = new HashMap<String, String>(); 

        // adding each child node to HashMap key => value 
        map.put(TAG_PID, id); 
        map.put(TAG_NAME, name); 

        // adding HashList to ArrayList 
        productsList.add(map); 
       } 
      } else { 
       // no products found 
       // Launch Add New product Activity 
       Intent i = new Intent(getApplicationContext(), 
         NewProductActivity.class); 
       // Closing all previous activities 
       i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
       startActivity(i); 
      } 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 

     return null; 
    } 

    /** 
    * After completing background task Dismiss the progress dialog 
    * **/ 
    protected void onPostExecute(String file_url) { 
     // dismiss the dialog after getting all products 
     pDialog.dismiss(); 
     // updating UI from Background Thread 
     runOnUiThread(new Runnable() { 
      public void run() { 
       /** 
       * Updating parsed JSON data into ListView 
       * */ 
       ListAdapter adapter = new SimpleAdapter(
         AllProductsActivity.this, productsList, 
         R.layout.list_item, new String[] { TAG_PID, 
           TAG_NAME}, 
         new int[] { R.id.pid, R.id.name }); 
       // updating listview 
       setListAdapter(adapter); 
      } 
     }); 

    } 

} 

代碼}

獲取信息的PHP代碼