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。

<?xml version="1.0" encoding="utf-8"?>

<AbsoluteLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

<Button

android:id="@+id/button_scale"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="scale"

android:layout_x="5dp"

android:layout_y="383dp" />

<Button

android:id="@+id/button_rotate"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="rotate"

android:layout_x="158dp"

android:layout_y="383dp" />

<Button

android:id="@+id/button_alpha"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="alpha"

android:layout_x="5dp"

android:layout_y="331dp" />

<Button

android:id="@+id/button_translate"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="translate"

android:layout_x="160dp"

android:layout_y="329dp" />

<Button

android:id="@+id/button_alpha_translate"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="alpha_translate"

android:layout_x="84dp"

android:layout_y="265dp" />

<ImageView

android:id="@+id/imageview"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_x="105dp"

android:layout_y="133dp"

android:src="@drawable/ic_launcher"

/>

</AbsoluteLayout>

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;

}

}