Question

当我尝试将振铃器模式更改为正常时会出现运行时错误。我正在使用依赖项服务以xamarin形式在android中调用音频管理器，但是当振铃器模式更改为无声（也许已经是无声的）时代码运行没有错误>

Answer 1

关于更改振铃模式，您可以按照以下步骤操作。

1。在Xamarin.Forms PCL中定义一个接口。

 public interface IChangeRingModeService
{
    void changeRingModeToNormal();
    void changeRingModeToVibrate();

    void changeRingModeToSilent();

}

在Android项目中，请在Mainactivity.cs中实现此接口，请不要忘记注册依赖项

[assembly: Dependency(typeof(MainActivity))]

namespace App4.Droid
{
[Activity(Label = "App4", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize| ConfigChanges.Orientation)]
public class MainActivity : 
   global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity, IChangeRingModeService
 {
AudioManager am;      
protected override void OnCreate(Bundle savedInstanceState)
{
    TabLayoutResource = Resource.Layout.Tabbar;
    ToolbarResource = Resource.Layout.Toolbar;


    base.OnCreate(savedInstanceState);

    global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
    LoadApplication(new App());                            

}

public void changeRingModeToVibrate()
{
    am = (AudioManager)Android.App.Application.Context.GetSystemService(Context.AudioService);
    am.RingerMode = RingerMode.Vibrate;
}

public void changeRingModeToNormal()
{
    am = (AudioManager)Android.App.Application.Context.GetSystemService(Context.AudioService);
    am.RingerMode = RingerMode.Normal;
}

public void changeRingModeToSilent()
{
    am = (AudioManager)Android.App.Application.Context.GetSystemService(Context.AudioService);
    am.RingerMode = RingerMode.Silent;
}}}

在点击事件中调用此方法。

 private void Button1licked(object sender, EventArgs e)
{
    DependencyService.Get<IChangeRingModeService>().changeRingModeToVibrate();
}

private void Button2licked(object sender, EventArgs e)
{
    DependencyService.Get<IChangeRingModeService>().changeRingModeToNormal();
}

private void Button3licked(object sender, EventArgs e)
{
    DependencyService.Get<IChangeRingModeService>().changeRingModeToSilent();
}

我们如何更改Xamarin形式的铃声模式

1 个答案: