20 Animation

4中特效对应四个类。

package mars.animations01;

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 MainActivity extends Activity {

    /** Called when the activity is first created. */

    private ImageView imageView = null;

    private Button rotateButton = null;

    private Button scaleButton = null;

    private Button alphaButton = null;

    private Button translateButton = null;
@Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        imageView = (ImageView) findViewById(R.id.imageViewId);
rotateButton = (Button) findViewById(R.id.rotateButtonId);

        rotateButton.setOnClickListener(new RotateButtonListener());
scaleButton = (Button) findViewById(R.id.scaleButtonId);

        scaleButton.setOnClickListener(new ScaleButtonListener());
alphaButton = (Button) findViewById(R.id.alphaButtonId);

        alphaButton.setOnClickListener(new AlphaButtonListener());
translateButton = (Button) findViewById(R.id.translateButtonId);

        translateButton.setOnClickListener(new TranslateButtonListener());

    }
private class RotateButtonListener implements OnClickListener {
@Override

        public void onClick(View view) {

            AnimationSet animationSet = new AnimationSet(true);

            RotateAnimation rotateAnimation = new RotateAnimation(0, 360,

                    Animation.RELATIVE_TO_PARENT, 1f,

                    Animation.RELATIVE_TO_PARENT, 0f);

            rotateAnimation.setDuration(5000);

            animationSet.addAnimation(rotateAnimation);

            imageView.startAnimation(animationSet);

        }

    }
private class ScaleButtonListener implements OnClickListener {
@Override

        public void onClick(View view) {

            AnimationSet animationSet = new AnimationSet(true);

            ScaleAnimation scaleAnimation = new ScaleAnimation(1, 0.1f, 1, 0.1f,

                    Animation.RELATIVE_TO_SELF, 0.5f,

                    Animation.RELATIVE_TO_SELF, 0.5f);

            animationSet.addAnimation(scaleAnimation);

            animationSet.setStartOffset(1000);

            animationSet.setFillAfter(true);

            animationSet.setFillBefore(false);

            animationSet.setDuration(2000);

            imageView.startAnimation(animationSet);

        }
}
private class AlphaButtonListener implements OnClickListener {
@Override

        public void onClick(View view) {

            //创建一个AnimationSet对象

            AnimationSet animationSet = new AnimationSet(true);

            //创建一个AlphaAnimation对象

            AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);

            //设置动画执行的时间（单位：毫秒）

            alphaAnimation.setDuration(1000);

            //将AlphaAnimation对象添加到AnimationSet当中

            animationSet.addAnimation(alphaAnimation);

            //使用ImageView的startAnimation方法开始执行动画

            imageView.startAnimation(animationSet);

        }
}
private class TranslateButtonListener implements OnClickListener {
@Override

        public void onClick(View view) {

            AnimationSet animationSet = new AnimationSet(true);

            TranslateAnimation translateAnimation = new TranslateAnimation(

                    Animation.RELATIVE_TO_SELF, 0f,

                    Animation.RELATIVE_TO_SELF, 0.5f,

                    Animation.RELATIVE_TO_SELF, 0f,

                    Animation.RELATIVE_TO_SELF, 1.0f);

            translateAnimation.setDuration(1000);

            animationSet.addAnimation(translateAnimation);

            imageView.startAnimation(animationSet);

        }

    }

}

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