I have the following code in Xamarin.Android, I want to show my main actcivty after the LottieAnimationView finshed.
<com.airbnb.lottie.LottieAnimationView
android:id="#+id/SplashAnimationView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
app:lottie_autoPlay="true"
app:lottie_fileName="LoadingLottie.json"
app:lottie_loop="false"
app:lottie_speed="1.00"/>
There is an AnimationEnd event in it. So you can try the following code:
LottieAnimationView lottieAnimationView = this.FindViewById<LottieAnimationView>(Resource.Id.SplashAnimationView);
lottieAnimationView.Animation.AnimationEnd += (s, e) =>
{
Intent intent = new Intent(this, typeof(MainActivity));
intent.SetFlags(ActivityFlags.NewTask);
StartActivity(intent);
};
Related
I have created an imageview and above it I created a textview. my aim is that I want to show my imageview if there's an image and if not I want to remove the imageview and display the textview that says "no image", this is my xml code:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
<TextView
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Item Image: "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView9"
android:textColor="#android:color/holo_blue_dark"/>
<ImageView
android:src="#android:drawable/ic_menu_gallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minWidth="25px"
android:minHeight="25px"
android:id="#+id/imageView1"
android:layout_toRightOf="#id/textView9"/>
<TextView
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="No Image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView10"
android:layout_toRightOf="#id/textView9"
/>
</RelativeLayout>
and this is my code:
ImageView imgv = view.FindViewById<ImageView>(Resource.Id.imageView1);
textview10 = view.FindViewById<TextView>(Resource.Id.textView10);
textview10.Visibility = ViewStates.Invisible;
private void Ws_getimg_clrCompleted(object sender, WSitems.getimg_clrCompletedEventArgs e)
{
Byte[] data = e.Result.datab;
if (data != null)
{
MemoryStream mem = new MemoryStream(data);
Android.Graphics.Bitmap originBitmap = BitmapFactory.DecodeStream(mem);
imgv.SetImageBitmap(originBitmap);
}
else
{
imgv.Visibility = ViewStates.Gone;
textview10.Visibility = ViewStates.Visible;
}
}
I get my image from a webservice. the problem is that only the imageview is disappearing when there's no image but the textview isn't becoming visible. why? what should I do? thanks in advance.
You can use FFImageLoading to replace your webservice to load Image on the intnet.
ImageView imageView1 = FindViewById<ImageView>(Resource.Id.imageView1);
TextView textView10 = FindViewById<TextView>(Resource.Id.textView10);
textView10.Visibility = ViewStates.Invisible;
// string urlToImage = "http://www.123raw.com/includes/templates/custom/images/123raw_mainpic_01.jpg";
string urlToImage = "http://www.123raw.com/includes/templates/custom/images/12311raw_mainpic_01.jpg";
var config = new FFImageLoading.Config.Configuration()
{
ExecuteCallbacksOnUIThread = true
};
ImageService.Instance.Initialize(config);
ImageService.Instance.LoadUrl(urlToImage).Error(exception =>
{
imageView1.Visibility = ViewStates.Gone;
textView10.Visibility = ViewStates.Visible;
}).Into(imageView1);
Here is running GIF, if the image cannot be loaded.
this is my code:
Task<Stream> GetStreamFromImageByte(CancellationToken ct)
{
//Since we need to return a Task<Stream> we will use a TaskCompletionSource>
TaskCompletionSource<Stream> tcs = new TaskCompletionSource<Stream>();
if (data != null)
{
tcs.TrySetResult(new MemoryStream(data));
}
return tcs.Task;
}
private void Ws_getimg_clrCompleted(object sender, WSitems.getimg_clrCompletedEventArgs e)
{
data = e.Result.datab;
var config = new FFImageLoading.Config.Configuration()
{
ExecuteCallbacksOnUIThread = true
};
ImageService.Instance.Initialize(config);
ImageService.Instance.LoadStream(GetStreamFromImageByte).Error(exception =>
{
imgv.Visibility = ViewStates.Gone;
textview10.Visibility = ViewStates.Visible;
}).Into(imgv);
So I am adding new button to my app but when FindViewById is called it returns null and app crashes. In my .cs file I have following function:
void fooUIButtonHandler()
{
var fooUIButton = FindViewById(Resource.Id.fooUIButton);
fooUIButton.Click += delegate
{
if (!CheckOriginalImage())
{
return;
}
Intent intent = new Intent(this, typeof(fooImageDemoActivity));
intent.PutExtra(fooImageDemoActivity.EXTRAS_ARG_IMAGE_FILE_URI,
originalImageUri.ToString());
StartActivityForResult(intent, REQUEST_SB_FOO_UI);
};
}
and my .axml file looks like this:
<Button
android:id="#+id/fooUIButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#0b8442"
style="#style/Widget.AppCompat.Button.Borderless"
android:text="foo"/>
I am setting Content View in OnCreate:
SetContentView(Resource.Layout.FooDocumentCreation);
and then calling:
fooUIButtonHandler()
But following line is throwing Null exception:
var fooUIButton = FindViewById(Resource.Id.fooUIButton);
Any ideas how to fix it?
I have the following code in alertDialog.SetPositiveButton
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);
}
I want the progress bar to increment in the places I specified . But when I run the app I have only progress bar circulating infinetly. I want to increase by and by. And After reaching 100 to dissapear. I've found too little information how to do that in Xamarin.Android and none of it helped me.
After the line where you findviewbyreference :
ProgressBar progressBar = FindViewById<ProgressBar>(Resource.Id.progressBar);
Set the max progress to 100 and then set the current progress to 0.
progressBar.Max = 100;
progressBar.Progress = 0;
Then incrementing the progress should work.
progressBar.IncrementProgressBy(10);
// Try adding delay after/before you set the progress.
// You can put the below code in a method and call that method after updating the progress bar.
try
{
Thread.Sleep(2000);
}
catch (Exception exception)
{
Android.Util.Log.Error("Error",exception.Message);
}
cs file
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);
The code above is in alert.SetPositiveButton("Yes" ....) method
the axml file
<?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>
I call a web service which gets 4 files, and while these files are loading I want to show progress to the user (circular or horizontal it doesn't matter). I've followed the examples on internet but nothing appears on screen.
MobileSellReference.Service1 service = new MobileSellReference.Service1();
service.Url = settings.Synchronization.Msellurl;
ProgressBar progressBar = FindViewById<ProgressBar>(Resource.Id.progressBar);
progressBar.Max = 100;
progressBar.Progress = 0;
byte[][] basedataResult = service.ToPPC(basedataZipName, objectId);
progressBar.IncrementProgressBy(25);
byte[][] dutybasedataResult = service.ToPPC(dutybasedataZipName, objectId);
progressBar.IncrementProgressBy(25);
byte[][] tranbasedataResult = service.ToPPC(tranbasedataZipName, objectId);
progressBar.IncrementProgressBy(25);
byte[][] vendbasedataResult = service.ToPPC(vendbasedataZipName, objectId);
progressBar.IncrementProgressBy(25);
I've found a lot of examples using external progressbar libraries but they all want to change the theme of the Activity. Instead I want some simple ProgressBar built into Xamarin.Android. For example when the first file is downloaded I want 1/4 of the circle to be filled, when 2 files are downloaded 1/2 of the circle to be filled et cetera. Similarly for a horizontal ProgressBar.
Use AsyncTask
.axml file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="0" />
<ProgressBar
android:id="#+id/pb"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal" />
</LinearLayout>
MainActivity:
public class MainActivity : Activity
{
ProgressBar pb;
TextView tv;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
pb = FindViewById<ProgressBar>(Resource.Id.pb);
tv = FindViewById<TextView>(Resource.Id.tv);
UpdatePB uptask = new UpdatePB(this,pb,tv);
uptask.Execute(100);
}
public class UpdatePB : AsyncTask<int, int, string>
{
Activity mcontext;
ProgressBar mpb;
TextView mtv;
public UpdatePB(Activity context,ProgressBar pb,TextView tv) {
this.mcontext = context;
this.mpb = pb;
this.mtv = tv;
}
protected override string RunInBackground(params int[] #params)
{
// TODO Auto-generated method stub
for (int i = 1; i <= 4; i++)
{
try
{
Thread.Sleep(3000);
}
catch (InterruptedException e)
{
// TODO Auto-generated catch block
Android.Util.Log.Error("lv",e.Message);
}
mpb.IncrementProgressBy(25);
PublishProgress(i * 25);
}
return "finish";
}
protected override void OnProgressUpdate(params int[] values)
{
mtv.Text = String.ValueOf(values[0]);
Android.Util.Log.Error("lv==", values[0] + "");
}
protected override void OnPostExecute(string result)
{
mcontext.Title = result;
}
}
}
This might be a helpful link:
https://developer.android.com/reference/android/widget/ProgressBar.html
Code:
<ProgressBar
android:id="#+id/determinateBar"
style="#android:style/Widget.ProgressBar.Horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:progress="25"/>
... and then you just change the progress; 25, 50, 75, 100?
After running into the same problem, I found another solution that got it working. I was reluctant to define a new class (like AsyncTask) to fix this, so looked into async await and threading. I found that after defining an Android.Widget.ProgressBar in an .axml layout file like so:
<ProgressBar
android:id="#+id/progressBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:progress="0"
style="?android:attr/progressBarStyleHorizontal" />
I could get it to update if I put the updating tasks in a System.Threading.Tasks.Task.Run and passing in an action that does the updates with RunOnUiThread call like:
btnDoStuff.Click += (sender, e) =>
{
Task.Run(() =>
{
RunOnUiThread(() =>
{
progressBar.Max = 100;
progressBar.Progress = 0;
progressBar.Visibility = ViewStates.Visible;
});
DoSomeWork1(arguments);
RunOnUiThread(() => progressBar.Progress += 25);
DoSomeWork2(arguments);
RunOnUiThread(() => progressBar.Progress += 25);
DoSomeWork3(arguments);
RunOnUiThread(() => progressBar.Progress += 25);
DoSomeWork4(arguments);
RunOnUiThread(() => progressBar.Progress += 25);
});
}
But even then I've had some inconsistent behavior - there may be an element of timing to it as well...
I have been using SaveToString() method to get the source code of the page in WebBrowser Control. But since its been deprecated in Windows 10, Whats the equivalent for SaveToString() in WebView Control of Windows 10.
WebView allows us to invoke script, and we can dump the document.documentElement.outerHTML to do the same thing as SaveToString().
The following shows a very simple sample for your test. Note that I didn't try to make a cool UI design and make all things formatted, but only try to show you the idea.
In xaml:
<StackPanel>
<WebView x:Name="MyWebView" Source="http://www.bing.com" Height="200"
DOMContentLoaded="MyWebView_DOMContentLoaded"/>
<Button x:Name="ViewSourceBtn" Content="View Source" Click="ViewSourceBtn_Click"/>
<RichTextBlock x:Name="SourceBlock" Height="300" >
</RichTextBlock>
</StackPanel>
Code behind:
bool contentloaded = false;
private async void ViewSourceBtn_Click(object sender, RoutedEventArgs e)
{
if (contentloaded)
{
string html = await MyWebView.InvokeScriptAsync("eval", new string[] { "document.documentElement.outerHTML;" });
var paragraph = new Paragraph();
paragraph.Inlines.Add(new Run { Text = html });
SourceBlock.Blocks.Clear();
SourceBlock.Blocks.Add(paragraph);
}
else
{
string err = "Waiting for HTML content to load!";
var paragraph = new Paragraph();
paragraph.Inlines.Add(new Run { Text = err });
SourceBlock.Blocks.Clear();
SourceBlock.Blocks.Add(paragraph);
}
}
private void MyWebView_DOMContentLoaded(WebView sender, WebViewDOMContentLoadedEventArgs args)
{
contentloaded = true;
}
Here is the result by clicking view source button: