public class MyFragment extends Fragment {
int mCurrentPage;
Context c;
GridView mListView;
String id, cat;
String strUrl;
TextView tvtitle;
TextView tv_id, tv_rating, tv_url;
public static String img_url, img_rating, img_id, img_name;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle data = getArguments();
mCurrentPage = data.getInt("current_page", 0);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = null;
DownloadTask downloadTask = new DownloadTask();
v = inflater.inflate(R.layout.starters, container, false);
tv_id = (TextView) v.findViewById(R.id.tv_starter_hide_id);
tv_rating = (TextView) v.findViewById(R.id.tv_starter_hide_ratinf);
tv_url = (TextView) v.findViewById(R.id.tv_starter_hide_url);
cat = Category.Main_Cat;
Log.i("Logcat Cat1", cat);
switch (mCurrentPage) {
case 1:
Log.v("MyFragment Heap", "Max Mem in MB:"
+ (Runtime.getRuntime().maxMemory() / 1024 / 1024));
// strUrl =
// "http://vaibhavtech.com/work/android/get_json.php?cat="+cat+"&subcat=1";
strUrl = " http://vaibhavtech.com/work/android/movie_list.php?category=BollyWood%20&sub_category=top";
downloadTask.execute(strUrl);
mListView = (GridView) v.findViewById(R.id.lv_countries);
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Intent i = new Intent(getActivity().getBaseContext(),
Starter_info.class);
img_id = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_id)).getText()
.toString();
img_rating = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_ratinf))
.getText().toString();
img_url = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_url)).getText()
.toString();
img_name = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_imagename))
.getText().toString();
startActivity(i);
}
});
break;
case 2:
// strUrl =
// "http://vaibhavtech.com/work/android/get_json.php?cat="+cat+"&subcat=1";
strUrl = " http://vaibhavtech.com/work/android/movie_list.php?category=BollyWood%20&sub_category=top";
downloadTask.execute(strUrl);
Log.v("Splash Heap", "Max Mem in MB:"
+ (Runtime.getRuntime().maxMemory() / 1024 / 1024));
mListView = (GridView) v.findViewById(R.id.lv_countries);
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Intent i = new Intent(getActivity().getBaseContext(),
Starter_info.class);
img_id = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_id)).getText()
.toString();
img_rating = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_ratinf))
.getText().toString();
img_url = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_url)).getText()
.toString();
img_name = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_imagename))
.getText().toString();
startActivity(i);
}
});
break;
default:
Log.i("Cat IS", Category.Main_Cat);
// strUrl =
// "http://vaibhavtech.com/work/android/get_json.php?cat="+cat+"&subcat=1";
strUrl = " http://vaibhavtech.com/work/android/movie_list.php?category=BollyWood%20&sub_category=top";
downloadTask.execute(strUrl);
Log.v("Splash Heap", "Max Mem in MB:"
+ (Runtime.getRuntime().maxMemory() / 1024 / 1024));
mListView = (GridView) v.findViewById(R.id.lv_countries);
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Intent i = new Intent(getActivity().getBaseContext(),
Starter_info.class);
img_id = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_id)).getText()
.toString();
img_rating = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_ratinf))
.getText().toString();
img_url = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_url)).getText()
.toString();
img_name = ((TextView) arg1
.findViewById(R.id.tv_starter_hide_imagename))
.getText().toString();
startActivity(i);
}
});
break;
}
return v;
}
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;
}
private class DownloadTask extends AsyncTask<String, Integer, String> {
String data = null;
@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) {
ListViewLoaderTask listViewLoaderTask = new ListViewLoaderTask();
listViewLoaderTask.execute(result);
}
}
private class ListViewLoaderTask extends
AsyncTask<String, Void, SimpleAdapter> {
JSONObject jObject;
@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());
}
StarterParser countryJsonParser = new StarterParser();
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());
}
String[] from = { "poster", "year", "duration", "id", "title" };
int[] to = { R.id.iv_flag, R.id.tv_starter_hide_url,
R.id.tv_starter_hide_ratinf, R.id.tv_starter_hide_id,
R.id.tv_starter_hide_imagename };
SimpleAdapter adapter = new SimpleAdapter(getActivity()
.getBaseContext(), countries, R.layout.lv_layout, from, to);
return adapter;
}
@Override
protected void onPostExecute(SimpleAdapter adapter) {
mListView.setAdapter(adapter);
ImageLoader imageLoader=new ImageLoader(getActivity());
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");
ImageView posterImage=((ImageView)adapter.getView(i, null, null).findViewById(R.id.iv_flag));
imageLoader.DisplayImage(imgUrl, R.drawable.img, posterImage);
/*ImageLoaderTask imageLoaderTask = new ImageLoaderTask();
HashMap<String, Object> hmDownload = new HashMap<String, Object>();
hm.put("flag_path", imgUrl);
hm.put("position", i);
imageLoaderTask.execute(hm);*/
}
}
}
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 = getActivity().getBaseContext()
.getCacheDir();
// 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("flag", 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("flag");
// Getting the position of the downloaded image
int position = (Integer) result.get("position");
// Getting adapter of the listview
SimpleAdapter adapter = (SimpleAdapter) mListView.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("flag", path);
// Noticing listview about the dataset changes
adapter.notifyDataSetChanged();
}
}
}
here is my imagelaoder class
public class ImageLoader {
MemoryCache memoryCache=new MemoryCache();
FileCache fileCache;
private Map<ImageView, String> imageViews=Collections.synchronizedMap(new WeakHashMap<ImageView, String>());
ExecutorService executorService;
public ImageLoader(Context context){
fileCache=new FileCache(context);
executorService=Executors.newFixedThreadPool(5);
}
int stub_id = R.drawable.img;
public void DisplayImage(String url, int loader, ImageView imageView)
{
stub_id = loader;
imageViews.put(imageView, url);
Bitmap bitmap=memoryCache.get(url);
if(bitmap!=null)
imageView.setImageBitmap(bitmap);
else
{
queuePhoto(url, imageView);
imageView.setImageResource(loader);
}
}
private void queuePhoto(String url, ImageView imageView)
{
PhotoToLoad p=new PhotoToLoad(url, imageView);
executorService.submit(new PhotosLoader(p));
}
private Bitmap getBitmap(String url)
{
File f=fileCache.getFile(url);
//from SD cache
Bitmap b = decodeFile(f);
if(b!=null)
return b;
//from web
try {
Bitmap bitmap=null;
URL imageUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();
conn.setConnectTimeout(30000);
conn.setReadTimeout(30000);
conn.setInstanceFollowRedirects(true);
InputStream is=conn.getInputStream();
OutputStream os = new FileOutputStream(f);
Utils.CopyStream(is, os);
os.close();
bitmap = decodeFile(f);
return bitmap;
} catch (Exception ex){
ex.printStackTrace();
return null;
}
}
//decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=70;
int width_tmp=o.outWidth, height_tmp=o.outHeight;
int scale=1;
while(true){
if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
break;
width_tmp/=2;
height_tmp/=2;
scale*=2;
}
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
//Task for the queue
private class PhotoToLoad
{
public String url;
public ImageView imageView;
public PhotoToLoad(String u, ImageView i){
url=u;
imageView=i;
}
}
class PhotosLoader implements Runnable {
PhotoToLoad photoToLoad;
PhotosLoader(PhotoToLoad photoToLoad){
this.photoToLoad=photoToLoad;
}
@Override
public void run() {
if(imageViewReused(photoToLoad))
return;
Bitmap bmp=getBitmap(photoToLoad.url);
memoryCache.put(photoToLoad.url, bmp);
if(imageViewReused(photoToLoad))
return;
BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);
Activity a=(Activity)photoToLoad.imageView.getContext();
a.runOnUiThread(bd);
}
}
boolean imageViewReused(PhotoToLoad photoToLoad){
String tag=imageViews.get(photoToLoad.imageView);
if(tag==null || !tag.equals(photoToLoad.url))
return true;
return false;
}
//Used to display bitmap in the UI thread
class BitmapDisplayer implements Runnable
{
Bitmap bitmap;
PhotoToLoad photoToLoad;
public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;}
public void run()
{
if(imageViewReused(photoToLoad))
return;
if(bitmap!=null)
photoToLoad.imageView.setImageBitmap(bitmap);
else
photoToLoad.imageView.setImageResource(stub_id);
}
}
public void clearCache() {
memoryCache.clear();
fileCache.clear();
}
}
here is my starterparser class
public class StarterParser {
// Receives a JSONObject and returns a list
public List<HashMap<String,Object>> parse(JSONObject jObject){
JSONArray jCountries = null;
try {
// Retrieves all the elements in the 'countries' array
jCountries = jObject.getJSONArray("Demo");
} catch (JSONException e) {
e.printStackTrace();
}
// Invoking getCountries with the array of json object
// where each json object represent a country
return getCountries(jCountries);
}
private List<HashMap<String, Object>> getCountries(JSONArray jCountries){
int countryCount = jCountries.length();
List<HashMap<String, Object>> countryList = new ArrayList<HashMap<String,Object>>();
HashMap<String, Object> country = null;
// Taking each country, parses and adds to list object
for(int i=0; i<countryCount;i++){
try {
// Call getCountry with country JSON object to parse the country
country = getCountry((JSONObject)jCountries.get(i));
countryList.add(country);
} catch (JSONException e) {
e.printStackTrace();
}
}
return countryList;
}
// Parsing the Country JSON object
private HashMap<String, Object> getCountry(JSONObject jCountry){
HashMap<String, Object> country = new HashMap<String, Object>();
String countryName = "";
String flag="";
String language = "";
String capital = "";
String currencyCode = "";
String currencyName = "";
try {
countryName = jCountry.getString("id");
// flag = "http://vaibhavtech.com/work/android/admin/upload/"+jCountry.getString("Images");
flag="http://vaibhavtech.com/work/android/admin/upload/img.png";
Log.i("imGE PATH", ""+flag);
// language = jCountry.getString("rank");
//capital = jCountry.getString("country");
currencyCode = jCountry.getString("duration");
currencyName = jCountry.getString("id");
String details = "Price : " + language + "\n" +
"Rating : " + currencyCode + "\n";
country.put("id", currencyName);
country.put("poster", R.drawable.picture_frame);
country.put("flag_path", flag);
country.put("duration",currencyCode);
country.put("year", flag);
country.put("title", jCountry.getString("title"));
Log.i("Json Imag Name", jCountry.getString("poster"));
} catch (JSONException e) {
e.printStackTrace();
}
return country;
}
}
我在此使用了图像加载器概念，但它没有在屏幕上显示图像。logcat 上只显示图像的名称和值。