我想在点击从此文件加载到活动中的列表项后，从JSON文件加载图像。显示图像及其描述。
它加载活动并显示图像，但不显示它的描述。 Logcat中有一些东西。
east.java
@SuppressLint("NewApi")
public class east extends Fragment {
ListView list;
TextView id;
TextView name;
Button Btngetdata;
east adaptor;
ArrayList<HashMap<String, String>> oslist = new ArrayList<HashMap<String, String>>();
//URL to get JSON Array
private static String url = "http://ra.com/s/east.php";
//JSON Node Names
private static final String TAG_ARRAY = "coffee";
private static final String TAG_ID = "ID";
private static final String TAG_NAME = "name";
private static final String TAG_adress = "adress";
private static final String TAG_IMAGE = "image";
JSONArray coffee = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.east_fragment, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
oslist = new ArrayList<HashMap<String, String>>();
Btngetdata = (Button)getView().findViewById(R.id.getdata);
Btngetdata.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new JSONParse().execute();
Btngetdata.setVisibility(View.GONE);
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
JsonParser jParser = new JsonParser();
private JSONObject json;
@Override
protected void onPreExecute() {
super.onPreExecute();
name = (TextView)getView().findViewById(R.id.name);
id = (TextView)getView().findViewById(R.id.id);
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected JSONObject doInBackground(String... args) {
// Getting JSON from URL
json = jParser.getJSONFromUrl(url);
return json;
}
@Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array from URL
coffee = json.getJSONArray(TAG_ARRAY);
for(int i = 0; i < coffee.length(); i++){
JSONObject c = coffee.getJSONObject(i);
// Storing JSON item in a Variable
String ID = null;
String name = null;
String adress = null;
String image = null;
try {
ID = new String(c.getString(TAG_ID).getBytes("ISO-8859-1"), "utf8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
name = new String(c.getString(TAG_NAME).getBytes("ISO-8859-1"), "utf8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
adress = new String(c.getString(TAG_adress).getBytes("ISO-8859-1"), "utf8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
image = new String(c.getString(TAG_IMAGE).getBytes("ISO-8859-1"), "utf8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Adding value HashMap key => value
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_ID, ID);
map.put(TAG_NAME, name);
map.put(TAG_adress, adress);
map.put(TAG_IMAGE, image);
oslist.add(map);
list = (ListView)getView().findViewById(R.id.listView1);
ListAdapter adapter = new SimpleAdapter(getActivity(), oslist,
R.layout.listview,
new String[] { TAG_ID, TAG_NAME, TAG_adress }, new int[] {
R.id.id, R.id.name, R.id.adress});
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getActivity(), SingleItemView.class);
// Pass all data rank
intent.putExtra("rank", oslist.get(+position).get("TAG_ID"));
// Pass all data country
intent.putExtra("country", oslist.get(+position).get("TAG_NAME"));
// Pass all data population
intent.putExtra("population", oslist.get(+position).get("TAG_adress"));
// Pass all data flag
intent.putExtra("flag", oslist.get(+position).get("image"));
// Start SingleItemView Class
startActivity(intent);
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
SingleItemView.java
public class SingleItemView extends Activity {
// Declare Variables
String rank;
String country;
String population;
String flag;
String position;
ImageLoader imageLoader = new ImageLoader(this);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from singleitemview.xml
setContentView(R.layout.singleitemview);
Intent i = getIntent();
// Get the result of rank
rank = i.getStringExtra("rank");
// Get the result of country
country = i.getStringExtra("country");
// Get the result of population
population = i.getStringExtra("population");
// Get the result of flag
flag = i.getStringExtra("flag");
// Locate the TextViews in singleitemview.xml
TextView txtrank = (TextView) findViewById(R.id.rank);
TextView txtcountry = (TextView) findViewById(R.id.country);
TextView txtpopulation = (TextView) findViewById(R.id.population);
// Locate the ImageView in singleitemview.xml
ImageView imgflag = (ImageView) findViewById(R.id.flag);
// Set results to the TextViews
txtrank.setText(rank);
txtcountry.setText(country);
txtpopulation.setText(population);
int loader = R.drawable.loader;
// Capture position and set results to the ImageView
// Passes flag images URL into ImageLoader.class
imageLoader.DisplayImage(flag, loader, imgflag);
}
}
我是新手，这是我的第一款应用。如果你给我一个解决方案来解决这个问题，我会很高兴的。
答案 0 :(得分：0)
您在East.java中传递NULL作为上下文