json decode by PHP array

json_decode_by_PHP_array.java

////////////////// PHP
	//get_multi_recordset.php
	$brands  = getSet($db, "select brand_id from brands where user_id=?", array($user_id));
	$categories  = getSet($db, "select category_id from categories where user_id=?", array($user_id));
	$subcategories  = getSet($db, "select subcategory_id from subcategories where user_id=?", array($user_id));
	$payments  = getSet($db, "select payment_id from payments where user_id=?", array($user_id));
	 
	$json                = array('brands'=> $brands, 'categories' => $categories, 'subcategories'  => $subcategories, 'payments'  => $payments);
	 
	header("Content-Type: application/json", true);
	 
	echo json_encode($json);
	
	
////////////////// ANDROID JAVA
	//here async, get the response from get_multi_recordset.php, and decode the JSONObject
	try {
	    JSONObject resp = new JSONObject(response);
	     
	    JSONArray brands = resp.getJSONArray("brands");
	     
	    String brand_ids="";
	    for (int i = 0 ; i < brands.length(); i++){
	        brand_ids+= ((JSONObject) brands.get(i)).getString("brand_id") + ",";
	    }
	     
	    if (brand_ids.length() > 0)
	        brand_ids = brand_ids.substring(0, brand_ids.length() - 1);
	     
	} catch (JSONException e) {
	    // TODO Auto-generated catch block
	    e.printStackTrace();
	}
	
	
	
//more : http://www.pipiscrew.com/2016/04/android-json-decode-by-php/