Animation

一、Animation

在Activity中设置动画效果：

package org.demo.animations1;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.animation.AlphaAnimation;

import android.view.animation.Animation;

import android.view.animation.AnimationSet;

import android.view.animation.RotateAnimation;

import android.view.animation.ScaleAnimation;

import android.view.animation.TranslateAnimation;

import android.widget.Button;

import android.widget.ImageView;

public class Animations1Activity extends Activity {

       private ImageView img=null;

    private Button alphaBtn=null;

    private Button scaleBtn=null;

    private Button rotateBtn=null;

    private Button translateBtn=null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        img=(ImageView)findViewById(R.id.img);

        alphaBtn=(Button)findViewById(R.id.alpha);

        alphaBtn.setOnClickListener(new AlphaClick());

       

        scaleBtn=(Button)findViewById(R.id.scale);

        scaleBtn.setOnClickListener(new scaleClick());

       

        rotateBtn=(Button)findViewById(R.id.rotate);

        rotateBtn.setOnClickListener(new rotateClick());

       

        translateBtn=(Button)findViewById(R.id.translate);

        translateBtn.setOnClickListener(new translateClick());

    }

    class AlphaClick implements OnClickListener{

              public void onClick(View v) {

                     //缩放效果

                     //建立一个AnimationSet，用来存放动画效果，true表示所有Animation共享AnimationSet设置的Interpolator

                     //如果为false，则需要为每个动画设置Interpolator

                     AnimationSet  set=new AnimationSet(true);

                     //建立一个alphaanimation

                     AlphaAnimation alpha=new AlphaAnimation(1f, 0.1f);

                     //设置动画持续时间

                     set.setDuration(5000);

                     //设置动画是否停留在执行动画后

                     set.setFillAfter(true);

                     //设置动画是否恢复到执行动画前

                     set.setFillBefore(false);

                     //将alpha添加到set集合中

                     set.addAnimation(alpha);

                     img.startAnimation(set);

              }

    }

    class scaleClick implements OnClickListener{

              public void onClick(View v) {

                     //缩放效果

                     //建立一个AnimationSet，用来存放动画效果

                     AnimationSet  set=new AnimationSet(true);

                     //建立一个scaleanimation

                     ScaleAnimation scale=new ScaleAnimation(0f, 0.5f, 0, 0.5f);

                     //设置动画持续时间

                     set.setDuration(5000);

                     //设置动画是否停留在执行动画后

                     set.setFillAfter(true);

                     //设置动画是否恢复到执行动画前

                     set.setFillBefore(false);

                     //将alpha添加到set集合中

                     set.addAnimation(scale);

                     img.startAnimation(set);

              }

    }

    class rotateClick implements OnClickListener{

              public void onClick(View v) {

                     //旋转

                     //建立一个AnimationSet，用来存放动画效果

                     AnimationSet  set=new AnimationSet(true);

                     //建立一个rotateanimation

                     RotateAnimation rotate=new RotateAnimation(10f,50f);

                     //设置动画持续时间

                     set.setDuration(5000);

                     set.addAnimation(rotate);

                     img.startAnimation(set);

              }

    }

    class translateClick implements OnClickListener{

              public void onClick(View v) {

                     //旋转

                     //建立一个AnimationSet，用来存放动画效果

                     AnimationSet  set=new AnimationSet(true);

                     //建立一个translateanimation

                     TranslateAnimation translate=new TranslateAnimation(0f,0f,1f,20f);

                     //设置动画持续时间

                     set.setDuration(5000);

                     set.addAnimation(translate);

                     img.startAnimation(set);

              }

    }

}