如何在 alertDialog 中使 ProgressBar 进度？（Xamarin.Android）答案

【问题标题】：How to make ProgressBar progress in alertDialog?(Xamarin.Android)如何在 alertDialog 中使 ProgressBar 进度？（Xamarin.Android）
【发布时间】：2018-04-02 12:13:43
【问题描述】：

我在alertDialog.SetPositiveButton中有以下代码

alertConfirmTransfer.SetPositiveButton("ДА", delegate
{
    ProgressBar progressBar = FindViewById<ProgressBar>(Resource.Id.progressBar);
    alertConfirmTransfer.Cancel();
    MobileSellReference.Service1 service = new 
    MobileSellReference.Service1();
    progressBar.IncrementProgressBy(10);
    service.Url = settings.Synchronization.Msellurl;
    progressBar.IncrementProgressBy(10);
    byte[][] resultFromService = service.ToPPC(basedataZipName, objectId);
    progressBar.IncrementProgressBy(10);
    byte[] basedataZipFile = resultFromService[0];
    byte[] dutybasedataZipFile = resultFromService[3];
    byte[] tranbasedataZipFile = resultFromService[2];
    byte[] vendbasedataZipFile = resultFromService[1];
    progressBar.IncrementProgressBy(10);

    string basedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + basedataZipName;
    string dutybasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + dutybasedataZipName;
    string tranbasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + tranbasedataZipName;
    string vendbasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + vendbasedataZipName;

    Helper.DeleteAllFromFolders(GlobalVariables.fromserverFolderPath, GlobalVariables.vendingFolderPath, GlobalVariables.tranFolderPath, GlobalVariables.debtFolderPath);
    progressBar.IncrementProgressBy(10);
    Helper.EmptyMobileSellDB();
    progressBar.IncrementProgressBy(10);
    System.IO.File.WriteAllBytes(basedataZipFullPath, basedataZipFile);
    progressBar.IncrementProgressBy(10);
    System.IO.File.WriteAllBytes(dutybasedataZipFullPath, dutybasedataZipFile);
    progressBar.IncrementProgressBy(10);
    System.IO.File.WriteAllBytes(tranbasedataZipFullPath, tranbasedataZipFile);
    progressBar.IncrementProgressBy(10);
    System.IO.File.WriteAllBytes(vendbasedataZipFullPath, vendbasedataZipFile);
    progressBar.IncrementProgressBy(10);
}

我希望进度条在我指定的地方增加。但是当我运行应用程序时，我只有无限循环的进度条。我想逐渐增加。并在达到100后消失。我在 Xamarin.Android 中找到的信息太少了，但对我没有任何帮助。

【问题讨论】：

标签： xamarin.android progress-bar

【解决方案1】：

在你找到viewbyreference的那一行之后：

ProgressBar progressBar = FindViewById<ProgressBar>(Resource.Id.progressBar);

将最大进度设置为 100，然后将当前进度设置为 0。

progressBar.Max = 100;
progressBar.Progress = 0;

然后增加进度应该可以工作。

progressBar.IncrementProgressBy(10);

// 尝试在设置进度之后/之前添加延迟。 // 可以将下面的代码放在一个方法中，在更新进度条后调用该方法。

              try
                {
                    Thread.Sleep(2000);
                }
                catch (Exception exception)
                {
                    Android.Util.Log.Error("Error",exception.Message);
                }

【讨论】：

进步不是一点点一点一点地增加的
可能任务执行得非常快，以至于您无法看到逐步更新的进度。尝试添加延迟，检查我编辑的答案。
我已经在每个IncrementProgressBy 调用之后或之前放置了Thread.Sleep(2000)，但它仍然会立即增加进度。
能否请您发布您的 xaml 和 *.cs 文件。

【解决方案2】：

cs文件

MobileSellReference.Service1 service = new MobileSellReference.Service1();
service.Url = settings.Synchronization.Msellurl;
progressBar.IncrementProgressBy(10);
Thread.Sleep(2000);

byte[][] resultFromService = service.ToPPC(basedataZipName, objectId);
progressBar.IncrementProgressBy(50);
Thread.Sleep(2000);

byte[] basedataZipFile = resultFromService[0];
byte[] dutybasedataZipFile = resultFromService[3];
byte[] tranbasedataZipFile = resultFromService[2];
byte[] vendbasedataZipFile = resultFromService[1];

string basedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + basedataZipName;
string dutybasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + dutybasedataZipName;
string tranbasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + tranbasedataZipName;
string vendbasedataZipFullPath = GlobalVariables.fromserverFolderPath + "/" + vendbasedataZipName;

Helper.DeleteAllFromFolders(GlobalVariables.fromserverFolderPath,         GlobalVariables.vendingFolderPath, GlobalVariables.tranFolderPath,     GlobalVariables.debtFolderPath);
progressBar.IncrementProgressBy(5);
Thread.Sleep(2000);
Helper.EmptyMobileSellDB();
progressBar.IncrementProgressBy(5);
Thread.Sleep(2000);
System.IO.File.WriteAllBytes(basedataZipFullPath, basedataZipFile);
progressBar.IncrementProgressBy(10);
Thread.Sleep(2000);
System.IO.File.WriteAllBytes(dutybasedataZipFullPath, dutybasedataZipFile);
progressBar.IncrementProgressBy(10);
Thread.Sleep(2000);
System.IO.File.WriteAllBytes(tranbasedataZipFullPath, tranbasedataZipFile);
progressBar.IncrementProgressBy(10);
Thread.Sleep(2000);
System.IO.File.WriteAllBytes(vendbasedataZipFullPath, vendbasedataZipFile);

上面的代码在alert.SetPositiveButton("Yes" ....)方法中

axml 文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="25px"
android:minHeight="25px">
<LinearLayout
    android:orientation="vertical"
    android:gravity="center"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/linearLayout1">
    <ProgressBar
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/progressBar" />
    <Button
        android:text="Взема данни"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnGetData" />
    <Button
        android:text="Предава данни"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnTransferData" />
    <Button
        android:text="Пълна синхронизация"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnFullSynchronization" />
</LinearLayout>

【讨论】：