Android中的動畫詳解系列【1】——逐幀動畫

逐幀動畫其實很簡單，下面我們來看一個例子：

<?xml version="1.0" encoding="utf-8"?><animation-list     xmlns:android="http://schemas.android.com/apk/res/android"      android:oneshot="false">    <item android:drawable="@drawable/progress_1" android:duration="200"/>     <item android:drawable="@drawable/progress_2" android:duration="200"/>     <item android:drawable="@drawable/progress_3" android:duration="200"/>     <item android:drawable="@drawable/progress_4" android:duration="200"/>     <item android:drawable="@drawable/progress_5" android:duration="200"/>     <item android:drawable="@drawable/progress_6" android:duration="200"/>     <item android:drawable="@drawable/progress_7" android:duration="200"/>     <item android:drawable="@drawable/progress_8" android:duration="200"/> </animation-list>

android:oneshot="false"的意思是迴圈播放

介面布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="開始"        android:onClick="start"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="停止"        android:onClick="stop"/><ImageView    android:id="@+id/iv"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:background="@anim/zhuzhen"    android:layout_gravity="center"/></LinearLayout>

MainActivity.java

package com.example.testanimation;import android.graphics.drawable.AnimationDrawable;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.View;import android.widget.ImageView;public class MainActivity extends ActionBarActivity {private AnimationDrawable anim;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ImageView iv = (ImageView) findViewById(R.id.iv);anim = (AnimationDrawable) iv.getBackground();}public void start(View view){anim.start();}public void stop(View view){anim.stop();}}

運行效果：