Android（七）：序列动画图片

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目录

源码

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/FrameLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:foregroundGravity="center">
    
    <TextView
        android:id="@+id/TextCount"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:textSize="50dp"
        android:text="00"/>

</FrameLayout>

using System.Timers;
using Android.App;
using Android.Graphics.Drawables;
using Android.OS;
using Android.Widget;
using Android.Support.V4.Content;

namespace android_by_csharp
{
    [Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]
    public class MainActivity : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);
            
            // 记录当前是第几图
            var textCount = (TextView)FindViewById(Resource.Id.TextCount);
            var frame = (FrameLayout)FindViewById(Resource.Id.FrameLayout1);
            if (textCount == null || frame == null) return;
            var count = 1;
            var t = new Timer(100); // 实例化Timer类，设置时间间隔
            t.Elapsed += new ElapsedEventHandler((s, e) =>
            {
                textCount.Text = count.ToString("00");
                frame.Foreground = SwitchImage(count);
                count++;
                if (count > 17) count = 1;
            });
            t.AutoReset = true; // 设置是执行一次（false）还是一直执行(true)
            t.Enabled = true; // 是否执行Timer.Elapsed事件
        }

        private Drawable SwitchImage(int n)
        {
            var drawable = n switch
            {
                1 => ContextCompat.GetDrawable(this, Resource.Drawable.s_1),
                2 => ContextCompat.GetDrawable(this, Resource.Drawable.s_2),
                3 => ContextCompat.GetDrawable(this, Resource.Drawable.s_3),
                4 => ContextCompat.GetDrawable(this, Resource.Drawable.s_4),
                5 => ContextCompat.GetDrawable(this, Resource.Drawable.s_5),
                6 => ContextCompat.GetDrawable(this, Resource.Drawable.s_6),
                7 => ContextCompat.GetDrawable(this, Resource.Drawable.s_7),
                8 => ContextCompat.GetDrawable(this, Resource.Drawable.s_8),
                9 => ContextCompat.GetDrawable(this, Resource.Drawable.s_9),
                10 => ContextCompat.GetDrawable(this, Resource.Drawable.s_10),
                11 => ContextCompat.GetDrawable(this, Resource.Drawable.s_11),
                12 => ContextCompat.GetDrawable(this, Resource.Drawable.s_12),
                13 => ContextCompat.GetDrawable(this, Resource.Drawable.s_13),
                14 => ContextCompat.GetDrawable(this, Resource.Drawable.s_14),
                15 => ContextCompat.GetDrawable(this, Resource.Drawable.s_15),
                16 => ContextCompat.GetDrawable(this, Resource.Drawable.s_16),
                17 => ContextCompat.GetDrawable(this, Resource.Drawable.s_17),
                _ => null
            };
            return drawable;
        }
    }
}