I am on the most current version of Xamarin Forms. I have a Content Page. The Content Page has a content that has a Button. That Button has Button_Clicked event Which you can see below. I use IToastNitificator (https://github.com/EgorBo/Toasts.Forms.Plugin), and I try to pass when I send this notification after I close my app, and after I clicked the Notification my App doesn't pop up Again. Anybody can help me how can I reach this?
This is my Button_Clicked method:
private async void Button_Clicked(object sender, EventArgs e)
{
var notificator = DependencyService.Get<IToastNotificator>();
var options = new NotificationOptions()
{
Title = "Teszt",
Description = "Önnek teszteket kell kitöltenie!",
IsClickable = true
};
var result = await notificator.Notify(options);
if(result.Action == NotificationAction.Clicked)
{
await Navigation.PushAsync(new QuestionPage());
}
}
I registered this Dependency and It's working fine.
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate (Bundle bundle)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
base.OnCreate (bundle);
Xamarin.Forms.DependencyService.Register<ToastNotification>();
Xamarin.Forms.DependencyService.Register<OpenAppAndroid>();
ToastNotification.Init(this);
BluetoothLowEnergyAdapter.Init(this);
global::Xamarin.Forms.Forms.Init (this, bundle);
LoadApplication (new Spirocco.App (BluetoothLowEnergyAdapter.ObtainDefaultAdapter(ApplicationContext)));
}
}
To reopen the Android application you need to set the ForceOpenAppOnNotificationTap to true in the AndroidOptions
Example:
var options = new NotificationOptions()
{
Title = "Teszt",
Description = "Önnek teszteket kell kitöltenie!",
IsClickable = true,
AndroidOptions = new AndroidOptions()
{
ForceOpenAppOnNotificationTap = true
}
};
Related
I am new on xamarin and i am trying to save my checkbox state even if the app is closed because when i close it the checkbox reset to uncheck state...
also.. the image that was changed resets.. is there any way to preserve both?
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.layout1);
var seletor = FindViewById<CheckBox>(Resource.Id.checkBox1);
var imagem = FindViewById<ImageView>(Resource.Id.imageView1);
seletor.Click += (o, e) => {
if (seletor.Checked)
imagem.SetImageResource(Resource.Drawable.estado1);
else
imagem.SetImageResource(Resource.Drawable.estado2);
};
}
Have you tried to use the Preferences?
Check the following: How to save user settings
Store the option selected onclose or suspend.. and retrieve onResume / OnLoad
Something like:
// Function called from OnDestroy
protected void saveset(){
//store
var prefs = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
var prefEditor = prefs.Edit();
prefEditor.PutString("PrefName", "Some value");
prefEditor.Commit();
}
// Function called from OnCreate
protected void retrieveset()
{
//retreive
var prefs = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
var somePref = prefs.GetString("PrefName", null);
//Show a toast
RunOnUiThread(() => Toast.MakeText(this, somePref, ToastLength.Long).Show());
}
as in the link provided.
Of course you'll need to adapt to your needs and get / populate the value of the checkbox.
If you want, you can also implement some kind of db and use the same mechanism to persist and retrieve settings.
This is usually what I use to store settings and persist values that I need to "remember"
This is an example of how I'm using the same behavior in one app.. not for a checkbox.. but you can see how it works. I removed some code, but I think should be a good example.
[Activity(Label = "#string/ApplicationName",
Icon = "#drawable/Icon")]
public class PersonalDetailsActivity : Activity
{
...
private ISharedPreferencesEditor prefEditor;
private ISharedPreferences preferences;
...
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.PersonalDetailView);
preferences = Application.Context.GetSharedPreferences("AppName", FileCreationMode.Private);
PopulatePersistedData();
}
private void PopulatePersistedData()
{
myId = preferences.GetInt(nameof(myData.Id), 0);
name.Text = preferences.GetString(nameof(myData.Name), null);
address.Text = preferences.GetString(nameof(myData.Address), null);
city.Text = preferences.GetString(nameof(myData.City), null);
county.Text = preferences.GetString(nameof(myData.County), null);
emailAddress.Text = preferences.GetString(nameof(myData.Email), null);
phoneNumber.Text = preferences.GetString(nameof(myData.PhoneNumber), null);
bio.Text = preferences.GetString(nameof(myData.Bio), null);
rating.Rating = 5;
}
private void SaveButton_Click(object sender, EventArgs e)
{
prefEditor = preferences.Edit();
myData = new Citizen();
myData.Name = name.Text;
myData.Address = address.Text;
myData.City = city.Text;
myData.County = county.Text;
myData.Email = emailAddress.Text;
myData.PhoneNumber = phoneNumber.Text;
myData.Bio = bio.Text;
prefEditor.PutInt(nameof(myData.Id), myId);
prefEditor.PutString(nameof(myData.Name), myData.Name);
prefEditor.PutString(nameof(myData.Address), myData.Address);
prefEditor.PutString(nameof(myData.City), myData.City);
prefEditor.PutString(nameof(myData.County), myData.County);
prefEditor.PutString(nameof(myData.Email), myData.Email);
prefEditor.PutString(nameof(myData.PhoneNumber), myData.PhoneNumber);
prefEditor.PutString(nameof(myData.Bio), myData.Bio);
prefEditor.Apply();
prefEditor.Commit();
var intent = new Intent();
intent.PutExtra("CitizenName", name.Text);
SetResult(Result.Ok, intent);
this.Finish();
}
}
I'm building a xamarin app where I'm using a Preprocessed Razor Template as a webview. I used this guide to set it up: https://developer.xamarin.com/guides/cross-platform/advanced/razor_html_templates/
It's working great and all but every time I do some css changes I have to restart the app to see the css changes. Is there another way to do this so I don't have to restart the app every time?
I tried adding a button which reloads the webView but that did not work. This is my activity:
public class ItemWebViewActivity : Activity
{
WebView webView;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
var itemId = Intent.GetIntExtra("itemId", 0);
SetContentView(Resource.Layout.ItemWebView);
webView = FindViewById<WebView>(Resource.Id.webView);
var dataService = new AzureDataService();
var item = dataService.GetItem(itemId);
Button refreshButton = (Button)FindViewById(Resource.Id.refreshButton);
refreshButton.Click += ReloadPage;
var decodedDesc = WebUtility.HtmlDecode(item.Description);
var vm = new Item()
{
Artist = item.Artist,
Title = item.Title,
Picture = item.Picture,
Description = decodedDesc
};
var template = new ItemWebView() { Model = vm };
var page = template.GenerateString();
webView.LoadDataWithBaseURL("file:///android_asset/",page, "text/html", "charset=UTF-8",null);
}
private void ReloadPage(object sender, EventArgs e)
{
webView.Reload();
}
}
Would appreciate any help :)
I've created a quick xamarin android project. Eventually I will want to take the learning below and apply it to a xamarin forms project that is shared between android and ios. For now I'm just focusing on the Android side of things.
I've been trying to learn how to schedule a local notification to appear at some time in the future. Made a quick throw away application, below is the AlarmReceiver Class I've written, as well as the MainActivity.cs below.
class AlarmReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
var message = intent.GetStringExtra("message");
var title = intent.GetStringExtra("title");
var notIntent = new Intent(context, typeof(MainActivity));
var contentIntent = PendingIntent.GetActivity(context, 0, notIntent, PendingIntentFlags.CancelCurrent);
var manager = NotificationManager.FromContext(context);
//Generate a notification with just short text and small icon
var builder = new Notification.Builder(context)
.SetContentIntent(contentIntent)
.SetContentTitle(title)
.SetContentText(message)
.SetWhen(Java.Lang.JavaSystem.CurrentTimeMillis())
.SetAutoCancel(true);
var notification = builder.Build();
manager.Notify(0, notification);
}
}
public class MainActivity : Activity
{
// Unique ID for our notification:
private static readonly int ButtonClickNotificationId = 1000;
// Number of times the button is tapped (starts with first tap):
private int count = 1;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
// Display the "Hello World, Click Me!" button and register its event handler:
Button button = FindViewById<Button>(Resource.Id.MyButton);
button.Click += ButtonOnClick;
}
// Handler for button click events.
private void ButtonOnClick(object sender, EventArgs eventArgs)
{
Intent alarmIntent = new Intent(Application.Context, typeof(AlarmReceiver));
alarmIntent.PutExtra("message", "This is my test message!");
alarmIntent.PutExtra("title", "This is my test title!");
PendingIntent pendingIntent = PendingIntent.GetBroadcast(Application.Context, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
AlarmManager alarmManager = (AlarmManager)Application.Context.GetSystemService(Context.AlarmService);
alarmManager.Set(AlarmType.ElapsedRealtime, SystemClock.ElapsedRealtime() + 1 * 1000, pendingIntent);
}
}
When I step through and debug this, it appears that my OnReceive method is not being called.
I was following this article as I'm having a really tough time researching how to do this correctly via google searches. Here: Scheduled Notifications
If anyone could share some wisdom, would greatly appreciate it.
The problem is that your BroadcastReceiver does not have the [BroadcastReceiver] attribute.
This code works:
AlarmReceiver.cs
[BroadcastReceiver]
public class AlarmReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
var message = intent.GetStringExtra("message");
var title = intent.GetStringExtra("title");
var resultIntent = new Intent(context, typeof(MainActivity));
resultIntent.SetFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
var pending = PendingIntent.GetActivity(context, 0,
resultIntent,
PendingIntentFlags.CancelCurrent);
var builder =
new Notification.Builder(context)
.SetContentTitle(title)
.SetContentText(message)
.SetSmallIcon(Resource.Drawable.Icon)
.SetDefaults(NotificationDefaults.All);
builder.SetContentIntent(pending);
var notification = builder.Build();
var manager = NotificationManager.FromContext(context);
manager.Notify(1337, notification);
}
}
MainActivity.cs
[Activity(Label = "App3", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(Resource.Layout.Main);
var button = FindViewById<Button>(Resource.Id.MyButton);
button.Click += delegate
{
var alarmIntent = new Intent(this, typeof(AlarmReceiver));
alarmIntent.PutExtra("title", "Hello");
alarmIntent.PutExtra("message", "World!");
var pending = PendingIntent.GetBroadcast(this, 0, alarmIntent, PendingIntentFlags.UpdateCurrent);
var alarmManager = GetSystemService(AlarmService).JavaCast<AlarmManager>();
alarmManager.Set(AlarmType.ElapsedRealtime, SystemClock.ElapsedRealtime() + 5*1000, pending);
};
}
}
MainActivity.cs
namespace testApp
{
[Activity (Label = "DHS HotKeys", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Activity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button1 = FindViewById<Button> (Resource.Id.button1);
Button button = FindViewById<Button> (Resource.Id.myButton);
button.Click += delegate {
var uri = Android.Net.Uri.Parse ("https://www.fridayparentportal.com/delran/");
var intent = new Intent (Intent.ActionView, uri);
StartActivity (intent);
};
button1.Click += (object sender, EventArgs e) => {
var uri2 = Android.Net.Uri.Parse ("http://dhs.delranschools.org/students/lunch_menu/");
var intent2 = new Intent (Intent.ActionView, uri2);
StartActivity (intent2);
};
}
}
}
Inside the resource designer:
public partial class Id
{
// aapt resource value: 0x7f050001
public const int button1 = 2131034113;
// aapt resource value: 0x7f050000
public const int myButton = 2131034112;
The 2nd button is set exactly like the first, but it does nothing when clicked, while the first one opens the webpage. The ID for 2nd button is #+id/button1
Thank you
write each button closer to their eventhandler, like this :
Button btn1 = FindViewById<Button>(Resource.Id.button1);
btn.Click += (object se,EventArgs e)
{
}
I am building an app where user can select which Language he wants to set when the app starts. A pop up will show "Select your Language" with two buttons one for Arabic and the other one for English.
The problem is that when I change the locale and execute this line
SetContentView (Resource.Layout.Main);
the app broke. there is no error or any exception but all controls stop capturing the events. I tried to declare an Intent using this and this.Class and when I call StartActivity it is like restarting the whole app and the pop comes again to select the language. I am new to android development as I spent my last two years working on SAP Abap so I might ask a stupid question :D
here is my code
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
namespace Khums
{
[Activity (Label = "Khums", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Activity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
// Set our view from the "main" layout resource
int r = Resource.Layout.Main;
SetContentView (Resource.Layout.Main);
var languageIso = "ar-SA";
AlertDialog.Builder alert = new AlertDialog.Builder (this);
//alert.SetTitle ("Selected Language");
AlertDialog alertDiaog = alert.Create ();
alertDiaog.SetTitle ("Select Language:");
alertDiaog.SetButton ("العربية", (s, EventArgs) => {
languageIso = "ar-SA";
var locale = new Java.Util.Locale(languageIso);
Java.Util.Locale.Default = locale;
var config = new Android.Content.Res.Configuration{Locale = locale };
BaseContext.Resources.UpdateConfiguration(config, BaseContext.Resources.DisplayMetrics);
//base.SetContentView(r);
//Intent intent = new Intent(this, this.Class);
//StartActivity(intent);
SetContentView (Resource.Layout.Main);
});
alertDiaog.SetButton2 ("English", (s, EventArgs) => {
languageIso = "en-US";
var locale = new Java.Util.Locale(languageIso);
Java.Util.Locale.Default = locale;
var config = new Android.Content.Res.Configuration{Locale = locale };
BaseContext.Resources.UpdateConfiguration(config, BaseContext.Resources.DisplayMetrics);
SetContentView (Resource.Layout.Main);
});
alertDiaog.Show();
Button button = FindViewById<Button> (Resource.Id.myButton);
RadioButton rb_FirstTime = FindViewById<RadioButton> (Resource.Id.radioButton1);
RadioButton rb_Regular = FindViewById<RadioButton> (Resource.Id.radioButton2);
EditText ti_lyearBalance = FindViewById<EditText> (Resource.Id.ti_lastBalance);
EditText ti_Balance = FindViewById<EditText> (Resource.Id.ti_Balance);
EditText ti_Clothes = FindViewById<EditText> (Resource.Id.ti_Clothes);
EditText ti_Food = FindViewById<EditText> (Resource.Id.ti_Food);
EditText ti_Perfumes = FindViewById<EditText> (Resource.Id.ti_Perfumes);
EditText ti_Subscriptions = FindViewById<EditText> (Resource.Id.ti_Subscriptions);
EditText ti_Others = FindViewById<EditText> (Resource.Id.ti_Others);
TextView lbl_lyearBalance = FindViewById<TextView> (Resource.Id.lbl_lastBalance);
rb_FirstTime.Click += RadioButtonHandler;
rb_Regular.Click += RadioButtonHandler;
button.Click += MyButtoHandler;
}
private void RadioButtonHandler(object sender, EventArgs e)
{
}
private void MyButtoHandler(object sender, EventArgs e)
{
}
private double calculateKhumus (double[] amounts, Boolean isRegular)
{
}
private void LangSwitchHndler(Object sender, EventArgs e)
{
}
}
}
can you please show me what I'm doing wrong here. I tried to use togglebutton instead of alert and also standard button but ends up with the same issue. Thank you.
It is solved after trying for two days. All I did is to create a menu and change the target framework to Android 3.1 Honeycomb. Then I just start the activity and everything is working fine.
So the issue was only target framework!