tuneup https://play.google.com/store/apps/details?id=tuneup.target.myradioapp&hl=en出现在 google play 但ProgressDialog不添加我只添加toast图像添加现在请帮助我如何运行dialog。在使用数据加载列表视图之前，我已经看到如何在具有列表视图的活动中显示进度条（圆圈）
public class Tab_Like extends Activity {
ListView lv;
TextView t1, t2;
ImageView iv;
public static String name, rating, like, radio_url, id, listner, image;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
// super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.category_name_radio);
setProgressBarIndeterminateVisibility(true);
setProgressBarIndeterminateVisibility(false);
super.onCreate(savedInstanceState);
/*
* LayoutInflater li = getLayoutInflater(); View layout =
* li.inflate(R.layout.customtoast, (ViewGroup)
* findViewById(R.id.custom_toast_layout)); Toast toast = new
* Toast(getApplicationContext()); toast.setDuration(Toast.LENGTH_LONG);
* toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
* toast.setView(layout); toast.show();
*/
TextView tv = (TextView) findViewById(R.id.textView1);
lv = (ListView) findViewById(R.id.list_view);
t1 = (TextView) findViewById(R.id.tv_country);
t2 = (TextView) findViewById(R.id.tv_country_details);
iv = (ImageView) findViewById(R.id.iv_flag);
// URL to the JSON data
String strUrl = "http://vaibhavtech.com/work/android/json_radio.php?cat=top";
// Creating a new non-ui thread task to download json data
DownloadTask downloadTask = new DownloadTask();
// Starting the download process
downloadTask.execute(strUrl);
// Getting a reference to ListView of activity_main
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
int songIndex = arg2;
Intent intent = new Intent(Tab_Like.this, Play_Radio.class);
// Toast.makeText(getBaseContext(),"Adapter"+""+arg0+" "+"View"+""+arg1+" "+
// "Int"+""+arg2+" "+"Long"+""+arg3+" ",
// Toast.LENGTH_LONG).show();
intent.putExtra("songIndex", songIndex);
setResult(100, intent);
radio_url = ((TextView) arg1
.findViewById(R.id.tv_other_data_radio_url)).getText()
.toString();
rating = ((TextView) arg1
.findViewById(R.id.tv_other_data_rating)).getText()
.toString();
id = ((TextView) arg1.findViewById(R.id.tv_other_data_id))
.getText().toString();
name = ((TextView) arg1.findViewById(R.id.tv_other_data_name))
.getText().toString();
Tab_Listner.id = id;
Tab_Listner.radio_url = radio_url;
Tab_Listner.name = name;
Tab_Listner.rating = rating;
startActivity(intent);
}
});
}
/** A method to download json data from url */
private String downloadUrl(String strUrl) throws IOException {
String data = "";
InputStream iStream = null;
try {
URL url = new URL(strUrl);
// Creating an http connection to communicate with url
HttpURLConnection urlConnection = (HttpURLConnection) url
.openConnection();
// Connecting to url
urlConnection.connect();
// Reading data from url
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(
iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
data = sb.toString();
br.close();
} catch (Exception e) {
Log.d("Exception while downloading url", e.toString());
} finally {
iStream.close();
}
return data;
}
/** AsyncTask to download json data */
private class DownloadTask extends AsyncTask<String, Integer, String> {
String data = null;
LinearLayout linlaHeaderProgress = (LinearLayout) findViewById(R.id.linlaH);
@Override
protected void onPreExecute() {
// SHOW THE SPINNER WHILE LOADING FEEDS
linlaHeaderProgress.setVisibility(View.VISIBLE);
super.onPreExecute();
}
@Override
protected String doInBackground(String... url) {
try {
data = downloadUrl(url[0]);
} catch (Exception e) {
Log.d("Background Task", e.toString());
}
return data;
}
@Override
protected void onPostExecute(String result) {
// The parsing of the xml data is done in a non-ui thread
ListViewLoaderTask listViewLoaderTask = new ListViewLoaderTask();
// Start parsing xml data
listViewLoaderTask.execute(result);
// HIDE THE SPINNER AFTER LOADING FEEDS
linlaHeaderProgress.setVisibility(View.GONE);
super.onPostExecute(result);
}
}
/** AsyncTask to parse json data and load ListView */
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) {
try {
jObject = new JSONObject(strJson[0]);
StarterParser countryJsonParser = new StarterParser();
countryJsonParser.parse(jObject);
} catch (Exception e) {
Log.d("JSON Exception1", e.toString());
}
// Instantiating json parser class
StarterParser countryJsonParser = new StarterParser();
// A list object to store the parsed countries list
List<HashMap<String, Object>> countries = null;
try {
// Getting the parsed data as a List construct
countries = countryJsonParser.parse(jObject);
} catch (Exception e) {
Log.d("Exception", e.toString());
}
// Keys used in Hashmap
String[] from = { "image", "id", "like", "rating", "listener",
"radio_url", "name" };
// Ids of views in listview_layout
int[] to = { R.id.iv_other_data_image, R.id.tv_other_data_id,
R.id.tv_other_data_like, R.id.tv_other_data_rating,
R.id.tv_other_data_listner, R.id.tv_other_data_radio_url,
R.id.tv_other_data_name };
// Instantiating an adapter to store each items
// R.layout.listview_layout defines the layout of each item
SimpleAdapter adapter = new SimpleAdapter(getBaseContext(),
countries, R.layout.lv_radio_detail, from, to);
return adapter;
}
/** Invoked by the Android on "doInBackground" is executed */
@Override
protected void onPostExecute(SimpleAdapter adapter) {
// Setting adapter for the listview
lv.setAdapter(adapter);
/*
* for(int i=0;i<adapter.getCount();i++){ HashMap<String, Object> hm
* = (HashMap<String, Object>) adapter.getItem(i); String imgUrl =
* (String) hm.get("flag_path"); ImageLoaderTask imageLoaderTask =
* new ImageLoaderTask();
*
* HashMap<String, Object> hmDownload = new HashMap<String,
* Object>(); hm.put("flag_path",imgUrl); hm.put("position", i);
*
* // Starting ImageLoaderTask to download and populate image in the
* listview imageLoaderTask.execute(hm); }
*/
}
}
/** AsyncTask to download and load an image in ListView */
/*
* private class ImageLoaderTask extends AsyncTask<HashMap<String, Object>,
* Void, HashMap<String, Object>>{
*
* @Override protected HashMap<String, Object>
* doInBackground(HashMap<String, Object>... hm) {
*
* InputStream iStream=null; String imgUrl = (String)
* hm[0].get("flag_path"); int position = (Integer) hm[0].get("position");
*
* URL url; try { url = new URL(imgUrl);
*
* // Creating an http connection to communicate with url HttpURLConnection
* urlConnection = (HttpURLConnection) url.openConnection();
*
* // Connecting to url urlConnection.connect();
*
* // Reading data from url iStream = urlConnection.getInputStream();
*
* // Getting Caching directory // File cacheDirectory =
* getBaseContext().getCacheDir(); File cacheDirectory =
* getBaseContext().getExternalCacheDir(); // Temporary file to store the
* downloaded image File tmpFile = new File(cacheDirectory.getPath() +
* "/wpta_"+position+".png");
*
* // The FileOutputStream to the temporary file FileOutputStream fOutStream
* = new FileOutputStream(tmpFile);
*
* // Creating a bitmap from the downloaded inputstream Bitmap b =
* BitmapFactory.decodeStream(iStream);
*
* // Writing the bitmap to the temporary file as png file
* b.compress(Bitmap.CompressFormat.PNG,100, fOutStream);
*
* // Flush the FileOutputStream fOutStream.flush();
*
* //Close the FileOutputStream fOutStream.close();
*
* // Create a hashmap object to store image path and its position in the
* listview HashMap<String, Object> hmBitmap = new HashMap<String,
* Object>();
*
* // Storing the path to the temporary image file
* hmBitmap.put("image",tmpFile.getPath());
*
* // Storing the position of the image in the listview
* hmBitmap.put("position",position);
*
* // Returning the HashMap object containing the image path and position
* return hmBitmap;
*
*
* }catch (Exception e) { e.printStackTrace(); } return null; }
*
* @Override protected void onPostExecute(HashMap<String, Object> result) {
* // Getting the path to the downloaded image
*
* String path = (String) result.get("image");
*
* // Getting the position of the downloaded image int position = (Integer)
* result.get("position");
*
* // Getting adapter of the listview SimpleAdapter adapter = (SimpleAdapter
* ) lv.getAdapter();
*
* // Getting the hashmap object at the specified position of the listview
* HashMap<String, Object> hm = (HashMap<String, Object>)
* adapter.getItem(position);
*
* // Overwriting the existing path in the adapter hm.put("image",path);
*
* // Noticing listview about the dataset changes
* adapter.notifyDataSetChanged(); } }
*/
}