簡體   English   中英

如何在Xamarin C#中使用setCompoundDrawables

[英]How to use setCompoundDrawables with Xamarin c#

所以我一直在努力處理特定的代碼行很長時間了。 這里是:

btnForward.SetCompoundDrawablesWithIntrinsicBounds(0,0,Android.Resource.Drawable.IcMediaPlay,0);

每當調用此行時,我的應用程序崩潰,並且我的應用程序輸出顯示以下內容:

[mono-rt] java.lang.NoSuchMethodError:沒有名稱為'getDrawable'signature ='(I)Landroid / graphics / drawable / Drawable;的方法;' 在類Landroid / content / Context中;
com.enterprise.project.CallDetails.n_onCreate上的[mono-rt](本機方法)
com.enterprise.project.CallDetails.onCreate(CallDetails.java:29)上的[mono-rt]
[mono-rt]在android.app.Activity.performCreate(Activity.java:5104)
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)上的[mono-rt]
[mono-rt]在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
[mono-rt]在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
[mono-rt],位於android.app.ActivityThread.access $ 600(ActivityThread.java:141)
[mono-rt],位於android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1234)
[mono-rt]在android.os.Handler.dispatchMessage(Handler.java:99)
[mono-rt]在android.os.Looper.loop(Looper.java:137)
[mono-rt]位於android.app.ActivityThread.main(ActivityThread.java:5041)
[mono-rt],位於java.lang.reflect.Method.invokeNative(本機方法)
[mono-rt],位於java.lang.reflect.Method.invoke(Method.java:511)
com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run中的[mono-rt](ZygoteInit.java:793)
com.android.internal.os.ZygoteInit.main上的[mono-rt](ZygoteInit.java:560)
dalvik.system.NativeStart.main上的[mono-rt](本機方法)

我嘗試了SetCompoundDrawables的多個變體(intrinsicbound,relative等),但是由於許多其他線程都說WithIntrinsicBounds是必經之路,所以我遵循了這種方式。

我嘗試使用SetCompoundDrawablesWithIntrinsicBounds的其他變體(使用null代替0,使用Drawable代替ID),但是出現了同樣的問題。

萬一這可能是問題,這里是bug之前的代碼塊中使用的幾行代碼

        case CallStatus.Paused: //Started but paused
            btnForward.Text = "Complete";
            btnForward.Clickable = true;
            btnForward.Visibility = ViewStates.Visible;
            btnForward.SetBackgroundColor (Android.Graphics.Color.Rgb (30, 118, 121));
            btnForward.SetCompoundDrawablesWithIntrinsicBounds(0,0,Android.Resource.Drawable.IcMediaPlay,0);
            break;

試試這個內部活動:

首先獲取資源ID:

_flagResourceId = this.Resources.GetIdentifier ("IcMediaPlay", "drawable", this.PackageName);

然后設置drawable:

btnForward.SetCompoundDrawablesWithIntrinsicBounds(0,0,Resources.GetDrawable(_flagResourceId),0); Resources.GetDrawable (_flagResourceId)

如何使用清單<object>回應 API - C# Xamarin<div id="text_translate"><p> I trying to convert this JSON API ( <a href="http://194.141.118.43:3000/?date=2022-03-22&id=400&daysForward=8" rel="nofollow noreferrer">http://194.141.118.43:3000/?date=2022-03-22&id=400&daysForward=8</a> ) to C# object here: <a href="https://json2csharp.com/" rel="nofollow noreferrer">https://json2csharp.com/</a></p><p> 我收到List<object> aladinModel { get; set; } List<object> aladinModel { get; set; }</p><p> 如何在我對 API 的回復中使用此列表 aladinModel:</p><pre> public async Task List<AladinModel> GetWeatherData(string query) { List<AladinModel> weatherData = new List<AladinModel>(); try { var response = await _client.GetAsync(query); if (response.IsSuccessStatusCode) { var content = await response.Content.ReadAsStringAsync(); weatherData = JsonConvert.DeserializeObject<AladinModel>(content); } } catch (Exception ex) { Debug.WriteLine("\t\tERROR {0}", ex.Message); } return weatherData; }</pre><p> 此行不正確:</p><pre> public async Task List<AladinModel> GetWeatherData(string query)</pre><p> 如何在這里使用這個列表?</p><p> ================================================ =============</p><p> <strong>更新</strong></p><p> ================================================ =============</p><p> object class 看起來像:</p><pre> class ItemsAPI { public partial class RootAladinModel { [JsonProperty("aladinModel")] public AladinModel[] AladinModel { get; set; } } public partial class AladinModel { [JsonProperty("DATS")] public DateTimeOffset Dats { get; set; } [JsonProperty("TA")] public double Ta { get; set; } [JsonProperty("RH")] public double Rh { get; set; } [JsonProperty("WS")] public double Ws { get; set; } [JsonProperty("RR")] public double Rr { get; set; } [JsonProperty("SR")] public double Sr { get; set; } [JsonProperty("APRES")] public double Apres { get; set; } } }</pre><p> RestService class 看起來像:</p><pre> public async Task<List<AladinModel>> GetAladinData(string query) { List<AladinModel> weatherData = new List<AladinModel>(); try { var response = await _client.GetAsync(query); if (response.IsSuccessStatusCode) { var content = await response.Content.ReadAsStringAsync(); weatherData = JsonConvert.DeserializeObject<List<AladinModel>>(content); } } catch (Exception ex) { Debug.WriteLine("\t\tERROR {0}", ex.Message); } return weatherData; }</pre><p> 但我收到錯誤:</p><pre> {Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON object (eg {"name":"value"}) into type 'System.Collections.Generic.List`1[pizhevsoft.Models.ItemsAPI+AladinModel]' because the type requires a JSON array (eg [1,2,3]) to deserialize correctly. To fix this error either change the JSON to a JSON array (eg [1,2,3]) or change the deserialized type so that it is a normal .NET type (eg not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. Path 'aladinModel', line 1, position 15. at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x003a0] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00054] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at pizhevsoft.Services.RestServiceAPI.GetAladinData (System.String query) [0x00151] in C:\Users\Admin\Desktop\pizhevsoft\pizhevsoft\pizhevsoft\pizhevsoft\Services\RestServiceAPI.cs:30 }</pre></div></object>

[英]How to use List<object> in response to API - C# Xamarin

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

相關問題 如何在Xamarin C#for iOS中使用UIPageControl 如何在 C# (Xamarin) 中使用 setOnTouchListener? 是否可以將 C# 9 用於 Xamarin? 如何在 Xamarin Forms 項目中使用最新的 C# 版本 如何在C#/ Xamarin中使用“ .ScrollTo”列表視圖方法 C#Xamarin如何在類中使用現有List? 如何在C#Xamarin Forms中將綁定屬性用作函數參數 如何使用清單<object>回應 API - C# Xamarin<div id="text_translate"><p> I trying to convert this JSON API ( <a href="http://194.141.118.43:3000/?date=2022-03-22&id=400&daysForward=8" rel="nofollow noreferrer">http://194.141.118.43:3000/?date=2022-03-22&id=400&daysForward=8</a> ) to C# object here: <a href="https://json2csharp.com/" rel="nofollow noreferrer">https://json2csharp.com/</a></p><p> 我收到List<object> aladinModel { get; set; } List<object> aladinModel { get; set; }</p><p> 如何在我對 API 的回復中使用此列表 aladinModel:</p><pre> public async Task List<AladinModel> GetWeatherData(string query) { List<AladinModel> weatherData = new List<AladinModel>(); try { var response = await _client.GetAsync(query); if (response.IsSuccessStatusCode) { var content = await response.Content.ReadAsStringAsync(); weatherData = JsonConvert.DeserializeObject<AladinModel>(content); } } catch (Exception ex) { Debug.WriteLine("\t\tERROR {0}", ex.Message); } return weatherData; }</pre><p> 此行不正確:</p><pre> public async Task List<AladinModel> GetWeatherData(string query)</pre><p> 如何在這里使用這個列表?</p><p> ================================================ =============</p><p> <strong>更新</strong></p><p> ================================================ =============</p><p> object class 看起來像:</p><pre> class ItemsAPI { public partial class RootAladinModel { [JsonProperty("aladinModel")] public AladinModel[] AladinModel { get; set; } } public partial class AladinModel { [JsonProperty("DATS")] public DateTimeOffset Dats { get; set; } [JsonProperty("TA")] public double Ta { get; set; } [JsonProperty("RH")] public double Rh { get; set; } [JsonProperty("WS")] public double Ws { get; set; } [JsonProperty("RR")] public double Rr { get; set; } [JsonProperty("SR")] public double Sr { get; set; } [JsonProperty("APRES")] public double Apres { get; set; } } }</pre><p> RestService class 看起來像:</p><pre> public async Task<List<AladinModel>> GetAladinData(string query) { List<AladinModel> weatherData = new List<AladinModel>(); try { var response = await _client.GetAsync(query); if (response.IsSuccessStatusCode) { var content = await response.Content.ReadAsStringAsync(); weatherData = JsonConvert.DeserializeObject<List<AladinModel>>(content); } } catch (Exception ex) { Debug.WriteLine("\t\tERROR {0}", ex.Message); } return weatherData; }</pre><p> 但我收到錯誤:</p><pre> {Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON object (eg {"name":"value"}) into type 'System.Collections.Generic.List`1[pizhevsoft.Models.ItemsAPI+AladinModel]' because the type requires a JSON array (eg [1,2,3]) to deserialize correctly. To fix this error either change the JSON to a JSON array (eg [1,2,3]) or change the deserialized type so that it is a normal .NET type (eg not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. Path 'aladinModel', line 1, position 15. at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x003a0] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00054] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in <7ca8898b690a4181a32a9cf767cedb1e>:0 at pizhevsoft.Services.RestServiceAPI.GetAladinData (System.String query) [0x00151] in C:\Users\Admin\Desktop\pizhevsoft\pizhevsoft\pizhevsoft\pizhevsoft\Services\RestServiceAPI.cs:30 }</pre></div></object> Xamarin.Forms:如何在C#代碼中使用自定義字體 如何在類構造函數中使用方法數據 c# xamarin
 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM