xamarin.android App在后台运行不退出

发布：2021/11/8 17:45:42作者：管理员来源：本站浏览次数：1323

/// <summary>

/// 重写按键事件

/// </summary>

/// <param name="keyCode"></param>

/// <param name="e"></param>

/// <returns></returns>

public override bool OnKeyDown([GeneratedEnum] Keycode keyCode, KeyEvent e)

{

// 根据某种情形禁用返回键

if (keyCode == Keycode.Back && disableBack)

{

PackageManager pm = PackageManager;

ResolveInfo homeInfo = pm.ResolveActivity(new Intent(Intent.ActionMain).AddCategory(Intent.CategoryHome), 0);

ActivityInfo ai = homeInfo.ActivityInfo;

Intent startIntent = new Intent(Intent.ActionMain);

startIntent.AddCategory(Intent.CategoryLauncher);

startIntent.SetComponent(new ComponentName(ai.PackageName, ai.Name));

StartActivitySafely(startIntent);

return false;

}

return base.OnKeyDown(keyCode, e);

}

private void StartActivitySafely(Intent intent)

{

intent.AddFlags(ActivityFlags.NewTask);

try

{

StartActivity(intent);

}

catch (ActivityNotFoundException ex)

{

Toast.MakeText(this, "StartActivitySafely()异常:" + ex.Message, ToastLength.Short).Show();

}

catch (SecurityException ex)

{

Toast.MakeText(this, "StartActivitySafely()异常:" + ex.Message, ToastLength.Short).Show();

}

　c# - Xamarin形式的隔离进程的后台服务

在 Xamarin.Android 中使用 Notification.Builder 构建通知　

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