在我的android应用程序上，我有自己的BaseAdapter，在此我有一个带有以下代码的clickbutton侦听器：
btnShareFacebook.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
videoMoreLayout.setVisibility(View.GONE);
final String id = videoIDs[position];
videoActions = new VideoActions();
hfu = new HttpFileUpload(videoPathURL[position], token);
final ProgressDialog pDialog = new ProgressDialog(activity);
pDialog.setMessage("Preparing video to share...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
if (!isOnline()) {
Toast.makeText(activity,
activity.getString(R.string.noInternetConnection),
Toast.LENGTH_SHORT).show();
} else {
try {
String arr[] = videoPathURL[position].split("/upload/videos/");
final String finalVideoName = (arr[arr.length-1]);
File DoutFile = new File(
Environment.getExternalStorageDirectory() +
File.separator + "vidytape_shared" + File.separator + finalVideoName);
if(!DoutFile.exists()){
pDialog.show();
String downloadResult = videoActions.downloadToShare(token, activity, id, videoPathURL[position], finalVideoName);
if (downloadResult.equalsIgnoreCase("POST_FAILURE") || downloadResult.equalsIgnoreCase("FAILURE_102")) {
Toast.makeText(
activity,
activity.getString(R.string.someErrorOccurred),
Toast.LENGTH_SHORT).show();
}
/*if(hfu.Download_File_To_Share(finalVideoName, videoPathURL[position])){
Toast.makeText(activity, "OK", Toast.LENGTH_LONG).show();
//pDialog.dismiss();
} else {
Toast.makeText(activity, "ERRO", Toast.LENGTH_LONG).show();
}*/
}
pDialog.dismiss();
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("video/*");
share.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(DoutFile));
share.putExtra(Intent.EXTRA_TEXT,
"" + activity.getResources().getString(R.string.app_name));
share.setPackage("com.facebook.katana");
activity.startActivity(share);
} catch (Exception e) {
pDialog.dismiss();
Toast.makeText(
activity,
activity.getString(R.string.facebookNotInstalled),
Toast.LENGTH_LONG).show();
}
}
}
});
现在，在这里，您具有类VideoActions的功能downloadToShare：
public String downloadToShare(String token, Activity activity, String videoID, String videoPath, String videoName) {
this.token = token;
this.activity = activity;
this.videoId = videoID;
this.videoPath = videoPath;
this.videoName = videoName;
DownloadToShareClass downloadAction = new DownloadToShareClass();
try {
return downloadAction.execute().get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
return null;
} // Close download
现在是downloadToShare类：
class DownloadToShareClass extends AsyncTask<String, String, String> {
String response = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(activity);
pDialog.setMessage("Preparing video to share...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
HttpFileUpload hfu = new HttpFileUpload(videoPath, token);
hfu.Download_File_To_Share(videoName, videoPath);
return "SUCESSFULLY";
}
} // Close DownloadClass
现在，download_file_to_share：
boolean Download_File_To_Share(String fileName, String urlToDownload) {
boolean downloadResult;
try {
downloadResult = DownloadFileToShare(fileName, urlToDownload);
return downloadResult;
} catch (MalformedURLException e) {
return false;
} catch (IOException e) {
return false;
}
}
最后，DownloadFileToShare：
// Download video
boolean DownloadFileToShare(String filename, String urlToDownload)
throws MalformedURLException, IOException {
BufferedInputStream in = null;
FileOutputStream fout = null;
try {
URL url = new URL(urlToDownload);
in = new BufferedInputStream(url.openStream());
fout = new FileOutputStream(
Environment.getExternalStorageDirectory() +
File.separator + "vidytape_shared" + File.separator + filename);
byte data[] = new byte[1024];
int count;
while ((count = in.read(data, 0, 1024)) != -1) {
fout.write(data, 0, count);
System.out.println(count);
}
} finally {
if (in != null)
in.close();
if (fout != null)
fout.close();
}
return true;
}
正如我在BaseAdapter代码上看到的那样，我的问题是，我正在显示一个进度对话框，但只有在所有其余步骤（视频下载）之后才会显示该对话框。这里有什么问题 ？我希望在下载视频时显示progressDialog ...
提前致谢
我已经找到了解决自己问题的方法。在我的BaseAdapter中，我将点击侦听器代码更改为以下代码，现在可以正常使用：
btnShareFacebook.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
videoMoreLayout.setVisibility(View.GONE);
hfu = new HttpFileUpload(videoPathURL[position], token);
final ProgressDialog pDialog = new ProgressDialog(activity);
pDialog.setMessage(activity.getResources().getString(R.string.preparingVideoToShare));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
if (!isOnline()) {
Toast.makeText(activity,
activity.getString(R.string.noInternetConnection),
Toast.LENGTH_SHORT).show();
} else {
try {
String arr[] = videoPathURL[position].split("/upload/videos/");
final String finalVideoName = (arr[arr.length-1]);
final File DoutFile = new File(
Environment.getExternalStorageDirectory() +
File.separator + "vidytape_shared" + File.separator + finalVideoName);
if(!DoutFile.exists()){
pDialog.show();
(new Thread(new Runnable() {
@Override
public void run() {
final String a = hfu.Download_File_To_Share(finalVideoName, videoPathURL[position]);
activity.runOnUiThread(new Runnable() {
public void run() {
if (!a.equalsIgnoreCase("ok")){
pDialog.dismiss();
Toast.makeText(activity,
activity.getResources().getString(R.string.someErrorOccurred),
Toast.LENGTH_LONG).show();
} else {
pDialog.dismiss();
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("video/*");
share.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(DoutFile));
share.putExtra(Intent.EXTRA_TEXT,
"" + activity.getResources().getString(R.string.app_name));
share.setPackage("com.facebook.katana");
activity.startActivity(share);
}
}
});
}
})).start();
} else {
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("video/*");
share.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(DoutFile));
share.putExtra(Intent.EXTRA_TEXT,
"" + activity.getResources().getString(R.string.app_name));
share.setPackage("com.facebook.katana");
activity.startActivity(share);
}
} catch (Exception e) {
if(pDialog.isShowing()){
pDialog.dismiss();
}
e.printStackTrace();
Toast.makeText(
activity,
activity.getString(R.string.facebookNotInstalled),
Toast.LENGTH_LONG).show();
}
}
}
});
我希望它也可以帮助某人。
最佳答案
您是否可以在扩展AsyncTask的DownloadToShareClass类的onPreExecute中添加代码以显示进度栏？
请参考http://developer.android.com/reference/android/os/AsyncTask.html
从上面的链接-
onPreExecute（），在执行任务之前在UI线程上调用。此步骤通常用于设置任务，例如，通过在用户界面中显示进度栏。
class DownloadToShareClass extends AsyncTask<String, String, String> {
private ProgressDialog mdialog;
public DownloadToShareClass(yourActivity activity) {
mdialog = new ProgressDialog(activity);
}
@Override
protected void onPreExecute() {
mdialog.show();
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
return null;
}
@Override
protected void onPostExecute(Void result) {
if (mdialog.isShowing()) {
mdialog.dismiss();
}
}
}
关于java - 来自Baseadapter的Android Java progressdialog，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/25127123/