android-jsonarrayadapter最新源代码

package com.readystatesoftware.android; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.json.JSONArray; import org.json.JSONObject; import android.content.Context; import android.net.Uri; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.ImageView; import android.widget.SimpleAdapter; import android.widget.SimpleAdapter.ViewBinder; import android.widget.TextView; /** * An easy adapter to map JSON data to views defined in an XML layout. Basically a wrapper around * {@link android.widget.SimpleAdapter} that maps data from a {@link org.json.JSONArray} instance. * * @author jgilfelt */ public class JSONArrayAdapter extends BaseAdapter implements Filterable { private JSONArray data; private String idField; private InternalSimpleAdapter internalAdapter; /** * Constructor * * @param context The context where the View associated with this SimpleAdapter is running * * @param data A JSONArray of JSONObjects. Each object in the array corresponds to one row in the list. The * JSONObjects contain the data for each row, and should include all the entries specified in * "from" * * @param resource Resource identifier of a view layout that defines the views for this list * item. The layout file should include at least those named views defined in "to" * * @param from A list of field names that will be mapped from the JSONObject associated with each * item. * * @param to The views that should display column in the "from" parameter. These should all be * TextViews. The first N views in this list are given the values of the first N columns * in the from parameter. * * @param idField The field name which contains a numeric identifier for each JSONObject. */ @SuppressWarnings({ "rawtypes", "unchecked" }) public JSONArrayAdapter(Context context, JSONArray data, int resource, String[] from, int[] to, String idField) { this.data = data; this.idField = idField; List simpleData = jsonToMapList(data, from); internalAdapter = new InternalSimpleAdapter(context, simpleData, resource, from, to); } /** * Constructor * * @param context The context where the View associated with this SimpleAdapter is running * * @param data A JSONArray of JSONObjects. Each object in the array corresponds to one row in the list. The * JSONObjects contain the data for each row, and should include all the entries specified in * "from" * * @param resource Resource identifier of a view layout that defines the views for this list * item. The layout file should include at least those named views defined in "to" * * @param from A list of field names that will be mapped from the JSONObject associated with each * item. * * @param to The views that should display column in the "from" parameter. These should all be * TextViews. The first N views in this list are given the values of the first N columns * in the from parameter. */ public JSONArrayAdapter(Context context, JSONArray data, int resource, String[] from, int[] to) { this(context, data, resource, from, to, null); } @SuppressWarnings("rawtypes") private List jsonToMapList(JSONArray data, String[] fields) { List<Map> listData = new ArrayList<Map>(); HashMap<String, String> item; for (int i = 0; i < data.length(); i++) { JSONObject o = data.optJSONObject(i); if (o != null) { item = new HashMap<String, String>(); for (int j = 0; j < fields.length; j++) { String fname = fields[j]; item.put(fname, optString(o, fname)); } listData.add(item); } } return listData; } private String optString(JSONObject o, String key) { //iterate over child json keys if we need to String[] keys = key.split("\\."); for (int i = 0; i < keys.length - 1; i++) o = o.optJSONObject(keys[i]); String lastKey = keys[keys.length - 1]; String s = o.optString(lastKey); if (s == null || s.equals("null")) { return null; } else { return s; } } public SimpleAdapter unwrap() { return internalAdapter; } public int getCount() { return internalAdapter.getCount(); } public Object getItem(int position) { return data.optJSONObject(position); } public long getItemId(int position) { if (idField != null) { JSONObject o = data.optJSONObject(position); if (o != null) { return o.optLong(idField, 0); } } return internalAdapter.getItemId(position); } public View getView(int position, View convertView, ViewGroup parent) { return internalAdapter.getView(position, convertView, parent); } /** * Returns the {@link ViewBinder} used to bind data to views. * * @return a ViewBinder or null if the binder does not exist * * @see #setViewBinder(android.widget.SimpleAdapter.ViewBinder) */ public ViewBinder getViewBinder() { return internalAdapter.getViewBinder(); } /** * Sets the binder used to bind data to views. * * @param viewBinder * the binder used to bind data to views, can be null to remove * the existing binder * * @see #getViewBinder() */ public void setViewBinder(ViewBinder viewBinder) { internalAdapter.setViewBinder(viewBinder); } /** * Called by bindView() to set the image for an ImageView but only if there * is no existing ViewBinder or if the existing ViewBinder cannot handle * binding to an ImageView. * * This method is called instead of {@link #setViewImage(ImageView, String)} * if the supplied data is an int or Integer. * * @param v * ImageView to receive an image * @param value * the value retrieved from the data set * * @see #setViewImage(ImageView, String) */ public void setViewImage(ImageView v, int value) { v.setImageResource(value); } /** * Called by bindView() to set the image for an ImageView but only if there * is no existing ViewBinder or if the existing ViewBinder cannot handle * binding to an ImageView. * * By default, the value will be treated as an image resource. If the value * cannot be used as an image resource, the value is used as an image Uri. * * This method is called instead of {@link #setViewImage(ImageView, int)} if * the supplied data is not an int or Integer. * * @param v * ImageView to receive an image * @param value * the value retrieved from the data set * * @see #setViewImage(ImageView, int) */ public void setViewImage(ImageView v, String value) { try { v.setImageResource(Integer.parseInt(value)); } catch (NumberFormatException nfe) { v.setImageURI(Uri.parse(value)); } } /** * Called by bindView() to set the text for a TextView but only if there is * no existing ViewBinder or if the existing ViewBinder cannot handle * binding to an TextView. * * @param v * TextView to receive text * @param text * the text to be set for the TextView */ public void setViewText(TextView v, String text) { v.setText(text); } public Filter getFilter() { return internalAdapter.getFilter(); } class InternalSimpleAdapter extends SimpleAdapter { public InternalSimpleAdapter(Context context, List<? extends Map<String, ?>> data, int resource,