画像を含むグリッドがあります。画像をクリックすると、本のダウンロードが始まります。ダウンロードが進行中で、その画像をクリックしている場合は、ダウンロードのみが開始されます。このため、結果のファイルは破損しています。画像のonClickイベントにダウンロードタスクが実行されました。最初の画像をクリック可能にfalseにしてから、setEnablefalseにしようとしました。しかし、どちらの方法も私にはうまくいきませんでした。ダウンロードが進行中であっても、画像のクリックは機能しています。ご案内ください。詳細については、ここに私のコードがあります：
public class GridViewAdapter extends BaseAdapter {
ImageView imageView;
private Context context;
private int item;
private LayoutInflater layoutInflater;
GridViewAdapter(Context c, int griditem) {
this.context = c;
this.item = griditem;
this.layoutInflater = (LayoutInflater) c
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return bank.size();
}
@Override
public Object getItem(int position) {
return bank.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup arg2) {
View grid;
Display display = ((WindowManager) context
.getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
int orientation = display.getOrientation();
if (convertView == null) {
grid = new View(context);
grid = layoutInflater.inflate(item, null);
} else {
grid = (View) convertView;
}
final TextView title = (TextView) grid.findViewById(R.id.mgntitle);
title.setText(bank.get(position).getTitle());
imageView = (ImageView) grid.findViewById(R.id.thumbnail);
imageView.setImageResource(R.drawable.icon);
final ProgressBar progress = (ProgressBar) grid
.findViewById(R.id.progress);
final ImageView downloadmark = (ImageView) grid
.findViewById(R.id.downloadmark);
String pdfLink = bank.get(position).getPdfLink();
String filename = pdfLink.substring(pdfLink.lastIndexOf("/") + 1);
final File targetDir = new File(fileLocation + filename);
if(targetDir.exists()){
downloadmark.setVisibility(View.VISIBLE);
}
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!targetDir.exists()) {
if (isInternetConnected()) {
map.put(bank.get(position).getTitle(), progress);
new DownloadPdfFile(GridDisplayActivity.this, bank
.get(position).getPdfLink(), progress,
downloadmark, imageView).execute();
} else {
setAlertBox("You are not connected to Internet. Please switch your connection ON to be able to Downlaod Bespoken Magazines");
}
} else {
Toast.makeText(context, "File exists",
Toast.LENGTH_LONG).show();
// Book opening intent has to be fried here
}
}
});
imageView.setImageBitmap(BitmapFactory.decodeByteArray(
bank.get(position).getCoverPages(), 0, bank.get(position)
.getCoverPages().length));
if (!getPrefName(filename).equalsIgnoreCase("NA")) {
if (new File(fileLocation + filename).exists()) {
// tag.setImageResource(R.drawable.bookmark);
downloadmark.setVisibility(View.VISIBLE);
} else {
SharedPreferences pref = getApplicationContext()
.getSharedPreferences("BESPOKEN_PREF",
MODE_WORLD_WRITEABLE);
SharedPreferences.Editor editor = pref.edit();
editor.putString(filename, "NA");
editor.commit();
}
}
if (new File(fileLocation + filename).exists()) {
if (!getPrefName(filename).equalsIgnoreCase("NA")) {
// tag.setImageResource(R.drawable.bookmark);
// downloadmark.setVisibility(View.VISIBLE);
} else {
}
}
return grid;
}
}
private String getPrefName(String name) {
SharedPreferences pref = this.getSharedPreferences("BESPOKEN_PREF",
MODE_WORLD_WRITEABLE);
return pref.getString(name, "NA");
}
private void saveBookName(String title) {
SharedPreferences pref = this.getSharedPreferences("BESPOKEN_PREF",
MODE_WORLD_WRITEABLE);
SharedPreferences.Editor editor = pref.edit();
editor.putString(title, title);
editor.commit();
}
private boolean isInternetConnected() {
connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
mMobile = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
return mWifi.isConnected() || mMobile.isConnected();
}
private class DownloadPdfFile extends AsyncTask<Void, Integer, Void> {
private int progressupdate;
String link;
ProgressBar progress;
ImageView cover;
String file;
ImageView dwnloadmark;
public DownloadPdfFile(GridDisplayActivity activity, String link,
ProgressBar progressbar, ImageView dwnmrk, ImageView imageView) {
imageView.setEnabled(false);
progress = progressbar;
this.link = link;
this.cover = imageView;
this.dwnloadmark = dwnmrk;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
cover.setEnabled(false);
progress.setVisibility(View.VISIBLE);
}
@Override
protected Void doInBackground(Void... params) {
file = link.substring(link.lastIndexOf("/") + 1);
InputStream is = null;
long startTime = 0;
int count;
// DownloadFromUrl(link, fileLocation + file,progress);
try {
URL url = new URL(link);
File dir = new File(fileLocation);
if (dir.exists()) {
} else {
Log.i("",
"---------targetDir not .exists()----------------4");
dir.mkdirs();
}
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(fileLocation + file);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress((int) ((total * 100) / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
}
Log.d("ImageManager",
"download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
return null;
}
@Override
protected void onProgressUpdate(Integer... prog) {
progressupdate = prog[0];
progress.setProgress(progressupdate);
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
dwnloadmark.setVisibility(View.VISIBLE);
// tag.setImageResource(R.drawable.bookmark);
progress.setVisibility(View.INVISIBLE);
saveBookName(file);
cover.setEnabled(true);
}
}
class DoBackgroundTask extends CustomAsyncTask<Void, Integer, Void> {
private static final String TAG = "DoBackgroundTask";
private int progressupdate;
String link;
private ProgressBar progress;
ImageView dwnloadmark;
ImageView cover;
String file;
GridDisplayActivity activity;
public DoBackgroundTask(GridDisplayActivity activity, String link,
ProgressBar progressbar, ImageView dwnmrk, ImageView img) {
super(activity);
img.setEnabled(false);
this.activity = activity;
progress = progressbar;
this.link = link;
this.dwnloadmark = dwnmrk;
this.cover = img;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
cover.setEnabled(false);
progress.setVisibility(View.VISIBLE);
}
@Override
protected void onActivityDetached() {
if (progress != null) {
//progress.setActivated(false);
// progress = null;
}
}
@Override
protected void onActivityAttached() {
//progress.setActivated(true);
progress.setVisibility(View.VISIBLE);
progress.setProgress(progressupdate);
// showProgressDialog();
}
@Override
protected Void doInBackground(Void... params) {
file = link.substring(link.lastIndexOf("/") + 1);
InputStream is = null;
long startTime = 0;
int count;
// DownloadFromUrl(link, fileLocation + file,progress);
try {
URL url = new URL(link);
File dir = new File(fileLocation);
if (dir.exists()) {
} else {
dir.mkdirs();
}
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(fileLocation + file);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress((int) ((total * 100) / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (IOException e) {
e.printStackTrace();
}
Log.d("ImageManager",
"download ready in"
+ ((System.currentTimeMillis() - startTime) / 1000)
+ " sec");
return null;
}
@Override
protected void onProgressUpdate(Integer... prog) {
progressupdate = prog[0];
if (mActivity != null) {
progress.setProgress(progressupdate);
} else {
Log.d(TAG, "Progress updated while no Activity was attached.");
}
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
dwnloadmark.setVisibility(View.VISIBLE);
cover.setEnabled(true);
saveBookName(file);
if (mActivity != null) {
progress.setVisibility(View.INVISIBLE);
Toast.makeText(mActivity, "AsyncTask finished",
Toast.LENGTH_LONG).show();
} else {
}
}
}