我尝试从php解析到android使用json，我使用locallhost（xampp）。当我解析布局时只显示加载ascnytsk，我使用url 10.0.2.2:81但是当我使用url http://api.androidhive.info/json/movies.json布局时可以显示。 我编辑localhost成为127.0.0.1:81
这是主要活动
public class MainActivity extends ListActivity {
private ProgressDialog pDialog;
// ALL JSON node names
public static final String TAG_NAME = "nama";
public static final String URL_CATEGORY = "http://10.0.2.2:81/bantulfolder/lihatpantai.php";
// albums JSONArray
JSONArray categories = null;
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
// private ListView lv;
private BaseAdapter mAdapter;
ArrayList<HashMap<String, String>> categoryList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
categoryList = new ArrayList<HashMap<String, String>>();
Log.d("onCreate: ", "Yep");
// get listview
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int position,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this, "Item selected: " + position,
Toast.LENGTH_LONG).show();
}
});
new LoadCategories().execute();
}
class LoadCategories extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
//pDialog.setMessage("Listing Categories...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
String json = jsonParser.makeHttpRequest(URL_CATEGORY, "GET",
params);
// Check your log cat for JSON reponse
Log.d("Categories JSON: ", "> " + json);
return json;
}
@Override
protected void onPostExecute(String json) {
try {
categories = new JSONArray(json);
if (categories != null) {
// looping through All albums
for (int i = 0; i < categories.length(); i++) {
JSONObject c = categories.getJSONObject(i);
// Storing each json item values in variable
String name = c.getString(TAG_NAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_NAME, name);
// adding HashList to ArrayList
categoryList.add(map);
}
mAdapter = new Adapter(MainActivity.this,
categoryList);
getListView().setAdapter(mAdapter);
// dismiss the dialog after getting all albums
pDialog.dismiss();
} else {
Log.d("Categories: ", "null");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
这是适配器
public class Adapter extends BaseAdapter {
private Context mContext;
LayoutInflater inflater;
private final ArrayList<HashMap<String, String>> urls;
HashMap<String, String> resultp = new HashMap<String, String>();
public Adapter(Context context,
ArrayList<HashMap<String, String>> items) {
mContext = context;
urls = items;
}
public int getCount() {
return urls.size();
}
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return getItem(position).hashCode();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView name, rating, genre, realase;
ImageView gambar;
inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.edit_layout, parent,
false);
resultp = urls.get(position);
name = (TextView) view.findViewById(R.id.judul);
name.setText(resultp.get(MainActivity.TAG_NAME));
return view;
}
}
这是json
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
/**
* Making service call
*
* @url - url to make request
* @method - http request method
* */
public String makeHttpRequest(String url, String method) {
return this.makeHttpRequest(url, method, null);
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
Log.e("JSON", json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
// function get json from url
// by making HTTP POST or GET mehtod
public String makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
// check for request method
if (method == "POST") {
HttpPost httpPost = new HttpPost(url);
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} else if (method == "GET") {
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
// DefaultHttpClient httpClient = new
// DefaultHttpClient(httpParameters);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// return JSON String
return json;
}
}
可以采用字符串但不能在布局中显示：（
{"catagories":[{"nama":"coba","alamat":"coba","gambar":"milanak.png","deskripsi":"Masukan deskripsi coba"}]}