问题描述
我目前正在尝试将图像集成到当前字符串的对象中。 但是，图像是在api中与其余字符串同时返回的url。 因此需要检索图像，并将其传递到对象中，以便适配器填充列表视图中的图像视图。 对不起，如果那令人困惑！
ListViewLoader如下：
private class ListViewLoaderTask extends AsyncTask<String, Void, SimpleAdapter> {
JSONObject jObject;
/** Doing the parsing of xml data in a non-ui thread */
@Override
protected SimpleAdapter doInBackground(String... strJson) {
List<HashMap<String, String>> properties = null;
try{
PropertiesParser propertiesParser = new PropertiesParser();
jObject = new JSONObject(strJson[0]);
/** Getting the parsed data as a List construct */
properties = propertiesParser.parse(jObject);
}catch(Exception e) {
Toast.makeText(MainActivity.this, e.toString(), Toast.LENGTH_LONG).show();
}
/** Keys used in Hashmap */
String[] from = { "image", "numBedrooms","propertyType","marketingStatus","price","applicationStatus","displayableAddress","listingId"};
/** Ids of views in listview_layout */
int[] to = { R.id.image, R.id.numBedrooms, R.id.propertyType, R.id.marketingStatus, R.id.price, R.id.applicationStatus, R.id.displayableAddress, R.id.listingId};
Log.d(TAG, properties.toString());
/**
* Instantiating an adapter to store each item
* R.layout.listview_layout defines the layout of each item
*/
SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), properties, R.layout.properties_layout, from, to);
return adapter;
}
/** Invoked by the Android system on "doInBackground" is executed completely */
/** This will be executed in ui thread */
@Override
protected void onPostExecute(SimpleAdapter adapter) {
/** Getting a reference to listview of main.xml layout file */
ListView listView = ( ListView ) findViewById(R.id.listView1);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new ListClickHandler());
InputMethodManager imm = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
}
}
属性解析器如下：
import android.util.Log; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class PropertiesParser { private static final String TAG = PropertiesParser.class.getSimpleName(); /** Receives a JSONObject and returns a list */ public List<HashMap<String,String>> parse(JSONObject jObject){ JSONObject jembedded = null; JSONArray jProperties = null; try { // Retrieves all the elements in the '_embedded' array jembedded = jObject.getJSONObject("_embedded"); jProperties = jembedded.getJSONArray("items"); } catch (JSONException e) { e.printStackTrace(); } return getProperties(jProperties); } private List<HashMap<String, String>> getProperties(JSONArray jProperties){ int propertyCount = jProperties.length(); List<HashMap<String, String>> propertyList = new ArrayList<HashMap<String,String>>(); HashMap<String, String> property = null; /** Taking each property, parses and adds to list object */ for(int i=0; i<propertyCount;i++){ try { /** Call getProperty with property JSON object to parse the property */ property = getProperty((JSONObject)jProperties.get(i)); propertyList.add(property); } catch (JSONException e) { e.printStackTrace(); } } return propertyList; } /** Parsing the Property JSON object */ private HashMap<String, String> getProperty(JSONObject jProperty) { HashMap<String, String> property = new HashMap<String, String>(); String applicationStatus = ""; String marketingStatus = ""; String numBedrooms = ""; String propertyType = ""; String price = ""; String displayableAddress = ""; String listingId = ""; JSONObject revisions = null; JSONObject currentRevision = null; JSONObject extra = null; JSONObject address = null; try { // Populate details into array.. listingId = jProperty.getString("id"); applicationStatus = jProperty.getString("application_status"); marketingStatus = jProperty.getString("marketing_status"); revisions = jProperty.getJSONObject("_embedded"); currentRevision = revisions.getJSONObject("current_revision"); extra = currentRevision.getJSONObject("_embedded"); address = extra.getJSONObject("address"); numBedrooms = currentRevision.getString("number_of_beds"); propertyType = currentRevision.getString("property_type"); price = currentRevision.getString("price"); displayableAddress = address.getString("line_one") + ", " + address.getString("post_code"); property.put("listingId", listingId); property.put("applicationStatus", applicationStatus); property.put("marketingStatus", marketingStatus); property.put("numBedrooms", numBedrooms + " bedroom(s)"); property.put("propertyType", propertyType); property.put("price", price); property.put("displayableAddress", displayableAddress); Log.d(TAG, property.toString()); } catch (JSONException e) { e.printStackTrace(); } return property; } }
我尝试在下面的链接中集成教程，但无法弄清楚如何将其与适配器一起使用： ：
对不起，如果需要进一步的信息，请告诉我。
1楼
您可以在适配器中传递字符串并使用库，如下所示：
Picasso.with(context).load(yourStringUrl).into(imageView);
填充图像视图。