尝试将从 JSON 获得的评分值更新到评分栏
我实现了对 textvie 的更新值，但是............如何将值从 JSON 评级更新到评级栏
这些是我用过的类
MainActivity.java
public class MainActivity extends Activity {
// Declare Variables
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String NAME = "rank";
static String TYPE = "country";
static String DISTANCE = "distance";
static String RATING = "rating";
static String FLAG = "flag";
static String PRICE= "price";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from listview_main.xml
setContentView(R.layout.listview_main);
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.listview);
// Execute DownloadJSON AsyncTask
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(MainActivity.this);
// Set progressdialog title
//mProgressDialog.setTitle("Fetching the information");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonobject = JSONfunctions.getJSONfromURL("url");
try {
// Locate the array name in JSON
jsonarray = jsonobject.getJSONArray("restaurants");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
map.put(MainActivity.NAME, jsonobject.getString("restaurantNAME"));
map.put(MainActivity.TYPE, jsonobject.getString("restaurantTYPE"));
map.put(MainActivity.FLAG, "http://54.218.73.244:7005/"+jsonobject.getString("restaurantIMAGE"));
map.put(MainActivity.DISTANCE, jsonobject.getString("restaurantDISTANCE"));
map.put(MainActivity.RATING, jsonobject.getString("restaurantRATING"));
map.put(MainActivity.PRICE, jsonobject.getString("restaurantPrice"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(MainActivity.this, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
}
ListViewAdapter.java
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
ImageLoader imageLoader;
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapter(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
imageLoader = new ImageLoader(context);
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView name;
TextView type;
TextView distance;
TextView rating;
Button price;
ImageView flag;
RatingBar ratingbar;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.listview_item, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
name = (TextView) itemView.findViewById(R.id.RestaurantNameID);
type = (TextView) itemView.findViewById(R.id.RestaurantTypeID);
distance = (TextView) itemView.findViewById(R.id.RestaurantDistanceID);
rating = (TextView) itemView.findViewById(R.id.RestaurantRatingID);
price=(Button) itemView.findViewById(R.id.BuyButton);
ratingbar=(RatingBar) itemView.findViewById(R.id.ratingIndicator);
// Locate the ImageView in listview_item.xml
flag = (ImageView) itemView.findViewById(R.id.flag);
// Capture position and set results to the TextViews
name.setText(resultp.get(MainActivity.NAME));
type.setText(resultp.get(MainActivity.TYPE));
distance.setText(resultp.get(MainActivity.DISTANCE));
rating.setText(resultp.get(MainActivity.RATING));
price.setText(resultp.get(MainActivity.PRICE));
//ratingbar.setRating(resultp.get(MainActivity.RATING));
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(resultp.get(MainActivity.FLAG), flag);
// Capture ListView item click
itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Get the position
resultp = data.get(position);
Intent intent = new Intent(context, RestaurantDesc.class);
// Pass all data rank
intent.putExtra("REST", resultp.get(MainActivity.NAME));
// Pass all data country
//intent.putExtra("type", resultp.get(MainActivity.TYPE));
// Pass all data flag
//intent.putExtra("flag", resultp.get(MainActivity.FLAG));
// Start SingleItemView Class
context.startActivity(intent);
}
});
return itemView;
}
}
listview_item.xml。
<RatingBar
android:id="@+id/ratingIndicator"
style="?android:attr/ratingBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/RestaurantPicImageLinearViewID"
android:layout_centerHorizontal="true" />
有任何想法吗 ！