在我的新 Android 应用程序中，我有一个ListView从 JSON 调用填充的视图，它正在工作。但我现在需要的是一个Spinner与ListView.
但是经过两天的尝试，我无法做到。其布局 XML 文件中的新Spinnerid 是spinner2. 如您在代码中所见，Spinner1从 a 填充。String[]
public class HiScreen extends ListActivity {
String[] spinnerValues = { "1","2","3"};
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> newsList;
// url to get all products list
private static String url_all_news = "";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_NEWS = "news";
private static final String TAG_ID = "id";
private static final String TAG_HEADER = "header";
private static final String TAG_BODY = "body";
private static final String TAG_TIME = "time";
// products JSONArray
JSONArray news = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_news);
Spinner mySpinner = (Spinner) findViewById(R.id.spinner1);
mySpinner.setAdapter(new MyAdapter(this, R.layout.custom_spinner,
spinnerValues));
Spinner s = (Spinner) findViewById( R.id.spinner2 );
String user,server_url;
Bundle extras = getIntent().getExtras();
// Obtenemos datos enviados en el intent.
if (extras != null) {
user = extras.getString("user");//usuario
server_url = extras.getString("server");
url_all_news = server_url+"android_get_all_news.php";
} else {
user="error";
}
// Hashmap for ListView
newsList = 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
;
}
public class MyAdapter extends ArrayAdapter<String> {
public MyAdapter(Context ctx, int txtViewResourceId, String[] objects) {
super(ctx, txtViewResourceId, objects);
}
@Override
public View getDropDownView(int position, View cnvtView, ViewGroup prnt) {
return getCustomView(position, cnvtView, prnt);
}
@Override
public View getView(int pos, View cnvtView, ViewGroup prnt) {
return getCustomView(pos, cnvtView, prnt);
}
public View getCustomView(int position, View convertView,
ViewGroup parent) {
LayoutInflater inflater = getLayoutInflater();
View mySpinner = inflater.inflate(R.layout.custom_spinner, parent,
false);
TextView main_text = (TextView) mySpinner .findViewById(R.id.text_main_seen);
main_text.setText(spinnerValues[position]);
TextView subSpinner = (TextView) mySpinner
.findViewById(R.id.sub_text_seen);
subSpinner.setText(spinnerSubs[position]);
ImageView left_icon = (ImageView) mySpinner
.findViewById(R.id.left_pic);
left_icon.setImageResource(total_images[position]);
return mySpinner;
}
}
// 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(HiScreen.this);
pDialog.setMessage("Loading News. Bitte warten...");
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_news, "GET", params);
// Check your log cat for JSON reponse
Log.d("All News: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
news = json.getJSONArray(TAG_NEWS);
String[] datos = new String[news.length()];
// looping through All Products
for (int i = 0; i < news.length(); i++) {
JSONObject c = news.getJSONObject(i);
// Storing each json item in variable
datos[i] = c.getString(TAG_HEADER);
String id = c.getString(TAG_ID);
String header = c.getString(TAG_HEADER);
String body = c.getString(TAG_BODY);
String time = c.getString(TAG_TIME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_HEADER, header);
map.put(TAG_BODY, body);
map.put(TAG_TIME, time);
// adding HashList to ArrayList
newsList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
HiScreen.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(
HiScreen.this, newsList,
R.layout.list_item, new String[] { TAG_ID,
TAG_HEADER,TAG_BODY,TAG_TIME},
new int[] { R.id.pid, R.id.name,R.id.body,R.id.time });
// updating listview
setListAdapter(adapter);
}
});
}
}
}