十八、动画-帧动画

一、帧动画

1.创建xml动态文件，我这里创建的是 frame.xml

2.使用 animation-list 将图片进行定位，并通过 android:duration 设置播放的时间

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/pic1" android:duration="100"/>
    <item android:drawable="@drawable/pic2" android:duration="100"/>
    <item android:drawable="@drawable/pic3" android:duration="100"/>
    <item android:drawable="@drawable/pic4" android:duration="100"/>
    <item android:drawable="@drawable/pic5" android:duration="100"/>
    <item android:drawable="@drawable/pic6" android:duration="100"/>
    <item android:drawable="@drawable/pic7" android:duration="100"/>
    <item android:drawable="@drawable/pic8" android:duration="100"/>
</animation-list>

3.创建主窗体页面

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/linearlayout1"
    android:orientation="vertical"
    android:background="@drawable/frame"
    xmlns:android="http://schemas.android.com/apk/res/android"/>

4.动画的启动和停止

//获取动画的Drawable资源

AnimationDrawable anim = (AnimationDrawable)relativeLayout.getBackground();

//启动动画

anim.start();

//停止动画

anim.stop();

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.drawable.Animatable;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    //标志位
    private  Boolean flag=true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LinearLayout ly= findViewById(R.id.linearlayout1);

        AnimationDrawable anim =(AnimationDrawable)ly.getBackground();

        ly.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (flag){
                    anim.start();
                    flag=false;
                }
                else {
                    anim.stop();
                    flag=true;
                }
            }
        });
    }
}

5.效果图