小米手机，允许通知，显示桌面应用角标，悬浮通知，锁屏通知，允许发声，允许振动，允许呼吸灯闪烁。

好的，小米手机允许通知并显示桌面应用角标的方法如下：

1. 在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

2. 在应用程序代码中请求“显示通知”权限：

Intent intent = new Intent(Settings.ACTION_APP_NOTIFICATION_SETTINGS);
intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
startActivity(intent);

3. 启用角标：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setNumber(1)
        .setAutoCancel(true);

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, builder.build());

4. 悬浮通知和锁屏通知的权限可以通过在通知设置屏幕中启用“悬浮通知”和“锁屏通知”选项来启用。

5. 允许发声和振动：

NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setNumber(1)
        .setAutoCancel(true)
        .setDefaults(Notification.DEFAULT_ALL);

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, builder.build());

6. 允许呼吸灯闪烁：

在 AndroidManifest.xml 文件中添加以下代码：

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
    </intent-filter>
</receiver>

在 MyBroadcastReceiver 的 onReceive() 方法中添加以下代码：

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.cancelAll();

NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setNumber(1)
        .setAutoCancel(true)
        .setDefaults(Notification.DEFAULT_ALL)
        .setLights(Color.BLUE, 500, 500);

notificationManager.notify(notificationId, builder.build());