Android帧动画

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转载请标明出处：http://blog.csdn.net/wu_wxc/article/details/50204235
本文出自【吴孝城的CSDN博客】

帧动画其实就是用几张静态的图片依次显示，由于人的“视觉残留”，所以给人一种动画的错觉。下面是帧动画的几个小例子

一

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="cn.wuxiaocheng.anim.MainActivity">    <ImageView        android:id="@+id/iv"        android:layout_gravity="center"        android:layout_width="100dp"        android:layout_height="100dp"        android:text="Hello World!" />    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="控制动画"        android:layout_gravity="bottom|center"/></FrameLayout>

MainActivity.java

package cn.wuxiaocheng.anim;import android.graphics.drawable.AnimationDrawable;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends AppCompatActivity {    private AnimationDrawable ad;    private ImageView iv;    private Button btn;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        iv = (ImageView) findViewById(R.id.iv);        btn = (Button) findViewById(R.id.btn);        ad = new AnimationDrawable();        //用addFrame向动画中添加帧，后面的参数是毫秒        ad.addFrame(getResources().getDrawable(R.mipmap.img1), 320);        ad.addFrame(getResources().getDrawable(R.mipmap.img2), 320);        ad.addFrame(getResources().getDrawable(R.mipmap.img3), 320);        //循环播放        ad.setOneShot(false);        iv.setBackgroundDrawable(ad);        btn.setOnClickListener(new View.OnClickListener() {            //调用stop()或start()方法停止或开始动画            @Override            public void onClick(View v) {                if (ad.isRunning()){                    ad.stop();                }else {                    ad.start();                }            }        });    }}

二

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="cn.wuxiaocheng.anim.MainActivity">    <ImageView        android:id="@+id/iv"        android:layout_gravity="center"        android:layout_width="100dp"        android:layout_height="100dp"        android:text="Hello World!" />    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="控制动画"        android:layout_gravity="bottom|center"/></FrameLayout>

res\drawable\pic_anim.xml

<?xml version="1.0" encoding="utf-8"?><animation-list xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@mipmap/img1" android:duration="320"/>    <item android:drawable="@mipmap/img2" android:duration="320"/>    <item android:drawable="@mipmap/img3" android:duration="320"/></animation-list>

MainActivity.java

package cn.wuxiaocheng.anim;import android.graphics.drawable.AnimationDrawable;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends AppCompatActivity {    private AnimationDrawable ad;    private ImageView iv;    private Button btn;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        iv = (ImageView) findViewById(R.id.iv);        btn = (Button) findViewById(R.id.btn);        iv.setBackgroundResource(R.drawable.pic_anim);        ad = (AnimationDrawable) iv.getBackground();        btn.setOnClickListener(new View.OnClickListener() {            //调用stop()或start()方法停止或开始动画            @Override            public void onClick(View v) {                if (ad.isRunning()){                    ad.stop();                }else {                    ad.start();                }            }        });    }}

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