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。
android:layout_width="fill_parent" android:layout_height="fill_parent" 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" /> 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" /> 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" /> 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" /> 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" /> 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" /> 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; } }