把代码过程重要的一些代码做个记录，下面代码是关于Android-图形图像与动画之Animation实现图像的 渐变、缩放、位移、旋转的代码。

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实现本实例的源代码如下：

public class Animations_Activity extends Activity {
    private Button button1;
    private Button button2;
    private Button button3;
    private Button button4;
    private Button button5;
    private ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_animations_);
        button1=(Button)findViewById(R.id.button_alpha);
        button2=(Button)findViewById(R.id.button_rotate);
        button3=(Button)findViewById(R.id.button_scale);
        button4=(Button)findViewById(R.id.button_translate);
        button5=(Button)findViewById(R.id.button_alpha_translate);
        imageView=(ImageView)findViewById(R.id.imageview);
        button1.setOnClickListener(new MyButton());
        button2.setOnClickListener(new MyButton());
        button3.setOnClickListener(new MyButton());
        button4.setOnClickListener(new MyButton());
        button5.setOnClickListener(new MyButton());
    }
    class MyButton implements OnClickListener{

        @Override
        public void onClick(View arg0) {
            switch (arg0.getId()) {
            case R.id.button_alpha:
                Alpha();
                break;
            case R.id.button_rotate:
                Rotata();
                break;
            case R.id.button_scale:
                Scale();
                break;
            case R.id.button_translate:
                Translate();
                break;
            case R.id.button_alpha_translate:
                Alpha_Translate();
                break;

            default:
                break;
            }
        }

    }

    public void Alpha() {
        AnimationSet animationSet=new AnimationSet(true);
        AlphaAnimation alphaAnimation=new AlphaAnimation(1, 0);
        alphaAnimation.setDuration(2000);
        animationSet.addAnimation(alphaAnimation);
        imageView.startAnimation(animationSet);
    }
    public void Rotata(){
        AnimationSet animationSet=new AnimationSet(true);
        RotateAnimation rotateAnimation=new RotateAnimation(
                0, 360, 
                Animation.RELATIVE_TO_PARENT, 1f,
                Animation.RELATIVE_TO_PARENT, 0f);
        rotateAnimation.setDuration(2000);
        animationSet.addAnimation(rotateAnimation);
        imageView.startAnimation(animationSet);
    }
    public void Scale() {
        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);
        scaleAnimation.setDuration(2000);
        animationSet.addAnimation(scaleAnimation);
        imageView.startAnimation(scaleAnimation);
    }
    public void Translate() {
        AnimationSet animationSet=new AnimationSet(true);
        TranslateAnimation translateAnimation=new TranslateAnimation(
        translateAnimation.setDuration(2000);
        animationSet.addAnimation(translateAnimation);

        animationSet.setFillAfter(true);
        animationSet.setFillBefore(false);
        animationSet.setStartOffset(2000);
        animationSet.setRepeatCount(3);

        imageView.startAnimation(animationSet);
    }
    public void Alpha_Translate() {
        AnimationSet animationSet=new AnimationSet(true);
        AlphaAnimation alphaAnimation=new AlphaAnimation(1, 0);
        alphaAnimation.setDuration(2000);
        animationSet.addAnimation(alphaAnimation);
        TranslateAnimation translateAnimation=new TranslateAnimation(
        translateAnimation.setDuration(2000);
        animationSet.addAnimation(translateAnimation);
        imageView.startAnimation(animationSet);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_animations_, menu);
        return true;
    }

}

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