我正在尝试计算媒体文件的持续时间并在检索时更新列表。我asyncTask用于计算持续时间。但是应用程序在计算大小之前一直挂起。为什么会这样？有更好的方法吗？
我的异步任务是：- ewLongOperation().execute(mFileMang.getCurrentDir()+"/" + mDataSource.get(position));
private class LongOperation extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
MediaPlayer mp = MediaPlayer.create(mContext, Uri.parse(params[0]));
long duration = mp.getDuration();
mp.reset();
mp.release();
String finalTimerString = "";
String secondsString = "";
String minutesString = "";
// Convert total duration into time
int hours = (int)( duration / (1000*60*60));
int minutes = (int)(duration % (1000*60*60)) / (1000*60);
int seconds = (int) ((duration % (1000*60*60)) % (1000*60) / 1000);
// Add hours if there
if(hours > 0){
finalTimerString = hours + ":";
}
// Prepending 0 to seconds if it is one digit
if(seconds < 10){
secondsString = "0" + seconds;
}else{
secondsString = "" + seconds;}
if(minutes < 10){
minutesString = "0" + minutes;
}else{
minutesString = "" + minutes;}
duration_video = finalTimerString = finalTimerString + minutesString + ":" + secondsString;
return null;
}
@Override
protected void onPostExecute(String result) {
//might want to change "executed" for the returned string passed into onPostExecute() but that is upto you
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(Void... values) {
}
}