android 特效之一 電視機關閉特效

廢話不說，上代碼： 1、要關閉的Activity代碼：  [java]  <span style="font-size:18px;">public class TVOffDemo extends Activity {      /** Called when the activity is first created. */            public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          Button b = (Button) findViewById(R.id.Button01);          b.setOnClickListener(new OnClickListener() {                            public void onClick(View v) {                  View img = findViewById(R.id.layout);                  img.startAnimation(new TVOffAnimation());              }          });      }  }</span>     [java]  <span style="font-size:18px;">2、動畫實作類別TVOffAnimation </span>  [java] view plaincopyprint?<span style="font-size:18px;">public class TVOffAnimation extends Animation {        private int halfWidth;      private int halfHeight;        public void initialize(int width, int height, int parentWidth, int parentHeight) {            super.initialize(width, height, parentWidth, parentHeight);          setDuration(500);          setFillAfter(true);          // 儲存View的中心點          halfWidth = width / 2;          halfHeight = height / 2;          setInterpolator(new AccelerateDecelerateInterpolator());        }        protected void applyTransformation(float interpolatedTime, Transformation t) {            final Matrix matrix = t.getMatrix();          if (interpolatedTime < 0.8) {              matrix.preScale(1 + 0.625f * interpolatedTime, 1 - interpolatedTime / 0.8f + 0.01f,                      halfWidth, halfHeight);          } else {              matrix.preScale(7.5f * (1 - interpolatedTime), 0.01f, halfWidth, halfHeight);          }      }  }</span>