Android 无法在SwipeFlingAdapterView中显示项目
我使用的是Android 无法在SwipeFlingAdapterView中显示项目,android,json,android-activity,android-arrayadapter,android-custom-view,Android,Json,Android Activity,Android Arrayadapter,Android Custom View,我使用的是SwipeFlingAdapterView,我从MySQL数据库中获取数据 变量: private ArrayList<String> al; private ArrayAdapter<String> arrayAdapter; private int i; SwipeFlingAdapterView flingContainer; JSONParser jParser = new JSONParser(); ArrayLi
SwipeFlingAdapterView
,我从MySQL数据库中获取数据
变量:
private ArrayList<String> al;
private ArrayAdapter<String> arrayAdapter;
private int i;
SwipeFlingAdapterView flingContainer;
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
// url to get all products list
private static String url_all_products = "http://example.com/items.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "items";
private static final String TAG_NAME = "name";
// products JSONArray
JSONArray products = null;
私有数组列表al;
专用阵列适配器阵列适配器;
私人互联网i;
SwipeFlingAdapterView flingContainer;
JSONParser jParser=新的JSONParser();
ArrayList productsList;
//获取所有产品列表的url
私有静态字符串url\u所有产品=”http://example.com/items.php";
//JSON节点名称
私有静态最终字符串标记_SUCCESS=“SUCCESS”;
私有静态最终字符串TAG_PRODUCTS=“items”;
私有静态最终字符串标记_NAME=“NAME”;
//产品JSONArray
JSONArray产品=null;
当我使用以下代码时,它将绑定数据:
al.add("php");
al.add("c");
al.add("python");
al.add("java");
// choose your favorite adapter
arrayAdapter = new ArrayAdapter<String>(MainActivity.this,
R.layout.item, R.id.tv_portal, al);
// set the listener and the adapter
flingContainer.setAdapter(arrayAdapter);
flingContainer
.setFlingListener(new SwipeFlingAdapterView.onFlingListener() {
@Override
public void removeFirstObjectInAdapter() {
// this is the simplest way to delete an object from the
// Adapter (/AdapterView)
Log.d("LIST", "removed object!");
al.remove(0);
arrayAdapter.notifyDataSetChanged();
}
@Override
public void onLeftCardExit(Object dataObject) {
// Do something on the left!
// You also have access to the original object.
// If you want to use it just cast it (String)
// dataObject
Toast.makeText(MainActivity.this, "Left!",
Toast.LENGTH_SHORT).show();
}
@Override
public void onRightCardExit(Object dataObject) {
Toast.makeText(MainActivity.this, "Right!",
Toast.LENGTH_SHORT).show();
}
@Override
public void onAdapterAboutToEmpty(int itemsInAdapter) {
// Ask for more data here
/*
* al.add("XML ".concat(String.valueOf(i)));
* arrayAdapter.notifyDataSetChanged(); Log.d("LIST",
* "notified"); i++;
*/
}
@Override
public void onScroll(float scrollProgressPercent) {
// TODO Auto-generated method stub
}
});
// Optionally add an OnItemClickListener
flingContainer
.setOnItemClickListener(new SwipeFlingAdapterView.OnItemClickListener() {
@Override
public void onItemClicked(int itemPosition,
Object dataObject) {
// Toast.make(MainActivity.this, "Clicked!");
}
});
al.add(“php”);
al.添加(“c”);
al.添加(“python”);
al.添加(“java”);
//选择您喜欢的适配器
arrayAdapter=新的arrayAdapter(MainActivity.this,
R.layout.item,R.id.tv_门户,al);
//设置侦听器和适配器
flingContainer.setAdapter(阵列适配器);
flingContainer
.setFlingListener(新SwipeFlingAdapterView.onFlingListener(){
@凌驾
public void removeFirstObjectInAdapter(){
//这是从数据库中删除对象的最简单方法
//适配器(/AdapterView)
Log.d(“列表”,“删除对象!”);
al.移除(0);
arrayAdapter.notifyDataSetChanged();
}
@凌驾
public void onLeftCardExit(对象dataObject){
//在左边做点什么!
//您还可以访问原始对象。
//如果您想使用它,只需将其强制转换(字符串)
//数据对象
Toast.makeText(MainActivity.this,“Left!”,
吐司。长度(短)。show();
}
@凌驾
RightCardExit上的公共无效(对象dataObject){
Toast.makeText(MainActivity.this,“Right!”,
吐司。长度(短)。show();
}
@凌驾
dapterabouttoempty上的公共void(int itemsInAdapter){
//在这里询问更多数据
/*
*al.add(“XML.concat(String.valueOf(i)));
*arrayAdapter.notifyDataSetChanged();Log.d(“列表”,
*“通知”);i++;
*/
}
@凌驾
公共无效onScroll(浮动百分比){
//TODO自动生成的方法存根
}
});
//(可选)添加一个McClickListener
flingContainer
.setOnItemClickListener(新的SwipeFlingAdapterView.OnItemClickListener(){
@凌驾
已单击公共项(int itemPosition,
对象(数据对象){
//Toast.make(MainActivity.this,“Clicked!”);
}
});
装载情况良好
但当我使用下面的代码时,即使没有出现错误,也不会绑定数据:
class LoadAllProducts extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("itemid", "1"));
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_items, "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 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_NAME, name);
al.add(name);
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
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() {
arrayAdapter = new ArrayAdapter<String>(MainActivity.this,
R.layout.item, R.id.tv_portal, al);
// set the listener and the adapter
flingContainer.setAdapter(arrayAdapter);
Toast.makeText(getApplicationContext(), "Done",
Toast.LENGTH_LONG).show();
}
});
}
}
class LoadAllProducts扩展异步任务{
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
pDialog=新建进度对话框(MainActivity.this);
pDialog.setMessage(“正在加载产品。请稍候…”);
pDialog.setUndeterminate(假);
pDialog.setCancelable(假);
pDialog.show();
}
受保护的字符串doInBackground(字符串…args){
//建筑参数
List params=new ArrayList();
参数添加(新的BasicNameValuePair(“itemid”,“1”));
//从URL获取JSON字符串
JSONObject json=jParser.makeHttpRequest(url\u all\u items,“GET”,
参数);
//检查日志cat中的JSON响应
Log.d(“所有产品:,json.toString());
试一试{
//检查成功标签
int success=json.getInt(TAG_success);
如果(成功==1){
//发现的产品
//获取一系列产品
products=json.getJSONArray(TAG_products);
//在所有产品中循环
对于(int i=0;ivalue
地图放置(标签名称、名称);
加上(姓名);
}
}否则{
}
}捕获(JSONException e){
e、 printStackTrace();
}
返回null;
}
受保护的void onPostExecute(字符串文件\u url){
//获取所有产品后关闭对话框
pDialog.disclose();
//从后台线程更新UI
runOnUiThread(新的Runnable(){
公开募捐{
arrayAdapter=新的arrayAdapter(MainActivity.this,
R.layout.item,R.id.tv_门户,al);
//设置侦听器和适配器
flingContainer.setAdapter(阵列适配器);
Toast.makeText(getApplicationContext(),“完成”,
Toast.LENGTH_LONG).show();
}
});
}
}
它没有加载数据,但显示toastdone
我正在使用此-https://github.com/Diolor/Swipecards
我该怎么做呢?我也面临同样的问题。我是这样解决的。 在这条线之后 flingContainer.setAdapter(阵列适配器) 添加这一行 arrayAdapter.notifyDataSetChanged()