Я новичок. Мне нужен элемент, нажав на список, чтобы отправить данные "ссылку" на действия "DownloadFile.java". Упражнение «DownloadFile.java» Мне нужно заменить данные на «String fileURL =» data для «ссылки» с предыдущими действиями. Большое спасибо.
acivity1
public class Mangalist extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listplaceholdermanga);
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
String xml = XMLmanga.getXML();
Document doc = XMLmanga.XMLfromString(xml);
int numResults = XMLmanga.numResults(doc);
if((numResults <= 0)){
Toast.makeText(Mangalist.this, "Geen resultaten gevonden", Toast.LENGTH_LONG).show();
finish();
}
NodeList nodes = doc.getElementsByTagName("result");
for (int i = 0; i < nodes.getLength(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element)nodes.item(i);
map.put("id", XMLmanga.getValue(e, "id"));
map.put("name", "Kapitola:" + XMLmanga.getValue(e, "name"));
map.put("volume", "Volume: " + XMLmanga.getValue(e, "volume"));
map.put("link", XMLmanga.getValue(e, "link"));
mylist.add(map);
}
ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.mangalist,
new String[] { "name", "volume" },
new int[] { R.id.item_title, R.id.item_subtitle });
setListAdapter(adapter);
final ListView lv = getListView();
lv.setTextFilterEnabled(true);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
@SuppressWarnings("unchecked")
HashMap<String, String> o = (HashMap<String, String>) lv.getItemAtPosition(position);
Toast.makeText(Mangalist.this, "Kapitola '" + o.get("id") + "'", Toast.LENGTH_LONG).show();
Intent i = new Intent(Mangalist.this,DownloadFile.class);
startActivity(i);
}
});
}
Скачать файл активности
public class DownloadFile extends Activity {
public static final String LOG_TAG = "Android Downloader";
//initialize our progress dialog/bar
private ProgressDialog mProgressDialog;
public static final int DIALOG_DOWNLOAD_PROGRESS = 0;
//initialize root directory
File rootDir = Environment.getExternalStorageDirectory();
//defining file name and url
public String fileName = "xx.jpg";
public String fileURL = "https://xx.JPG";
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setting some display
setContentView(R.layout.main);
TextView tv = new TextView(this);
tv.setText("Android Download File With Progress Bar");
//making sure the download directory exists
checkAndCreateDirectory("/my_downloads");
//executing the asynctask
new DownloadFileAsync().execute(fileURL);
}
//this is our download file asynctask
class DownloadFileAsync extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(DIALOG_DOWNLOAD_PROGRESS);
}
@Override
protected String doInBackground(String... aurl) {
try {
//connecting to url
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
//lenghtOfFile is used for calculating download progress
int lenghtOfFile = c.getContentLength();
//this is where the file will be seen after the download
FileOutputStream f = new FileOutputStream(new File(rootDir + "/my_downloads/", fileName));
//file input is from the url
InputStream in = c.getInputStream();
//here's the download code
byte[] buffer = new byte[1024];
int len1 = 0;
long total = 0;
while ((len1 = in.read(buffer)) > 0) {
total += len1; //total = total + len1
publishProgress("" + (int)((total*100)/lenghtOfFile));
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
Log.d(LOG_TAG, e.getMessage());
}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d(LOG_TAG,progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
@Override
protected void onPostExecute(String unused) {
//dismiss the dialog after the file was downloaded
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
}
}
//function to verify if directory exists
public void checkAndCreateDirectory(String dirName){
File new_dir = new File( rootDir + dirName );
if( !new_dir.exists() ){
new_dir.mkdirs();
}
}
//our progress bar settings
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOWNLOAD_PROGRESS: //we set this to 0
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Downloading file...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(true);
mProgressDialog.show();
return mProgressDialog;
default:
return null;
}
}