Android图形与图像处理-补间动画
Android图形与图像处理-补间动画
创建项目:TweenAnim
项目运行效果:
项目代码:
动画资源文件:两个动画资源文件
anim.xml
<?xml version="1.0" encoding="utf-8"?> <!-- 指定动画匀速改变 --> <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator"> <!-- 定义缩放变换 --> <scale android:fromXScale="1.0" android:toXScale="0.01" android:fromYScale="1.0" android:toYScale="0.01" android:pivotX="50%" android:pivotY="50%" android:fillAfter="true" android:duration="3000"/> <!-- 定义透明度的变换 --> <alpha android:fromAlpha="1" android:toAlpha="0.05" android:duration="3000" /> <!-- 定义旋转变换 --> <rotate android:fromDegrees="0" android:toDegrees="1800" android:pivotX="50%" android:pivotY="50%" android:duration="3000"/> </set>
reverse.xml
<?xml version="1.0" encoding="utf-8"?> <!-- 指定动画匀速改变 --> <set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator" android:startOffset="3000"> <!-- 定义缩放变换 --> <scale android:fromXScale="0.01" android:toXScale="1" android:fromYScale="0.01" android:toYScale="1" android:pivotX="50%" android:pivotY="50%" android:fillAfter="true" android:duration="3000" /> <!-- 定义透明度的变换 --> <alpha android:fromAlpha="0.05" android:toAlpha="1" android:duration="3000" /> <!-- 定义旋转变换 --> <rotate android:fromDegrees="1800" android:toDegrees="0" android:pivotX="50%" android:pivotY="50%" android:duration="3000" /> </set>
布局文件:main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center_horizontal" > <Button android:id="@+id/bn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="播放动画" /> <ImageView android:id="@+id/flower" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/flower" /> </LinearLayout>
TweenAnim.java
package wwj.tweenanim; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.View.OnClickListener; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.Button; import android.widget.ImageView; public class TweenAnim extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ImageView flower = (ImageView)findViewById(R.id.flower); //加载第一份动画资源 final Animation anim = AnimationUtils.loadAnimation(this, R.anim.anim); //设置动画结束后保留结束状态 anim.setFillAfter(true); //加载第二份动画资源 final Animation reverse = AnimationUtils.loadAnimation(this, R.anim.reverse); //设置动画结束后保留结束状态 reverse.setFillAfter(true); Button bn = (Button)findViewById(R.id.bn); final Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { if(msg.what == 0x123){ flower.startAnimation(reverse); } }; }; bn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub flower.startAnimation(anim); //设置3。5秒后启动第二个动画 new Timer().schedule(new TimerTask() { @Override public void run() { // TODO Auto-generated method stub handler.sendEmptyMessage(0x123); } }, 3500); } }); } }