Android仿天貓商品拋物線加入購物車動畫

public class MainActivity extends Activity {
 
 private ImageView top;
 private ImageView bottom;
 private ImageView animImageView;
 private ViewGroup anim_mask_layout;// 動畫層
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 top = (ImageView) findViewById(R.id.top);
 bottom = (ImageView) findViewById(R.id.bottom);
 
 }
 
 public void startAnim(View view) {
 // 記錄開始的位置
 int[] startLocation = new int[2];// 一個整型數(shù)組，用來存儲按鈕的在屏幕的X、Y坐標(biāo)
 top.getLocationInWindow(startLocation);// 這是獲取購買按鈕的在屏幕的X、Y坐標(biāo)（這也是動畫開始的坐標(biāo)）
 
 // 創(chuàng)建要做動畫的ImageView
 animImageView = new ImageView(this);
 
 // 設(shè)置animImageView的背景
 Drawable background = top.getBackground();
 Drawable zoomDrawable = zoomDrawable(background, dip2Px(this, 200),
 dip2Px(this, 200));
 animImageView.setBackgroundDrawable(zoomDrawable);
 
 // 開始執(zhí)行動畫
 setAnim(animImageView, startLocation, top);
 }
 
 /**
 * 設(shè)置動畫
 * 
 * @param v
 * @param startLocation
 * @param view
 */
 private void setAnim(final View v, int[] startLocation, final View view) {
 
 anim_mask_layout = null;
 anim_mask_layout = createAnimLayout();
 anim_mask_layout.addView(v);// 把動畫小球添加到動畫層
 final View viewa = addViewToAnimLayout(anim_mask_layout, v,
 startLocation);
 int[] endLocation = new int[2];// 存儲動畫結(jié)束位置的X、Y坐標(biāo)
 bottom.getLocationInWindow(endLocation);// shopCart是那個購物車
 
 // 計算位移
 int endX = endLocation[0] - startLocation[0];// 動畫位移的X坐標(biāo)
 int endY = endLocation[1] - startLocation[1];// 動畫位移的y坐標(biāo)
 TranslateAnimation translateAnimationX = new TranslateAnimation(0,
 endX, 0, 0);
 translateAnimationX.setInterpolator(new LinearInterpolator());
 translateAnimationX.setRepeatCount(0);// 動畫重復(fù)執(zhí)行的次數(shù)
 translateAnimationX.setFillAfter(true);
 
 TranslateAnimation translateAnimationY = new TranslateAnimation(0, 0,
 0, endY);
 translateAnimationY.setInterpolator(new AccelerateInterpolator());
 translateAnimationY.setRepeatCount(0);// 動畫重復(fù)執(zhí)行的次數(shù)
 translateAnimationX.setFillAfter(true);
 
 ScaleAnimation scaleAnimation = new ScaleAnimation(0.6f, 0.1f,0.6f, 0.1f);
 scaleAnimation.setInterpolator(new AccelerateInterpolator());
 scaleAnimation.setRepeatCount(0);// 動畫重復(fù)執(zhí)行的次數(shù)
 scaleAnimation.setFillAfter(true);
 
 AnimationSet set = new AnimationSet(false);
 set.setFillAfter(false);
 set.addAnimation(scaleAnimation);
 set.addAnimation(translateAnimationY);
 set.addAnimation(translateAnimationX);
 set.setDuration(600);// 動畫的執(zhí)行時間
 viewa.startAnimation(set);
 // 動畫監(jiān)聽事件
 set.setAnimationListener(new AnimationListener() {
 // 動畫的開始
 @Override
 public void onAnimationStart(Animation animation) {
 v.setVisibility(View.VISIBLE);
 }
 
 @Override
 public void onAnimationRepeat(Animation animation) {
 }
 
 // 動畫的結(jié)束
 @Override
 public void onAnimationEnd(Animation animation) {
 v.setVisibility(View.GONE);
 }
 });
 }
 
 /**
 * @Description: 創(chuàng)建動畫層
 * @param
 * @return void
 * @throws
 */
 private ViewGroup createAnimLayout() {
 ViewGroup rootView = (ViewGroup) ((Activity) this).getWindow()
 .getDecorView();
 LinearLayout animLayout = new LinearLayout(this);
 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
 LinearLayout.LayoutParams.MATCH_PARENT,
 LinearLayout.LayoutParams.MATCH_PARENT);
 animLayout.setLayoutParams(lp);
 animLayout.setId(Integer.MAX_VALUE);
 animLayout.setBackgroundResource(android.R.color.transparent);
 rootView.addView(animLayout);
 return animLayout;
 }
 
 private View addViewToAnimLayout(final ViewGroup parent, final View view,
 int[] location) {
 int x = location[0];
 int y = location[1];
 LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
 LinearLayout.LayoutParams.WRAP_CONTENT,
 LinearLayout.LayoutParams.WRAP_CONTENT);
 lp.leftMargin = x;
 lp.topMargin = y;
 view.setLayoutParams(lp);
 return view;
 }
 
 /**
 * 將drawable對象進(jìn)行指定大小的縮放
 * 
 * @param drawable
 * @param w
 * @param h
 * @return
 */
 public Drawable zoomDrawable(Drawable drawable, int w, int h) {
 int width = drawable.getIntrinsicWidth();
 int height = drawable.getIntrinsicHeight();
 Bitmap oldbmp = drawableToBitmap(drawable); // drawable 轉(zhuǎn)換成 bitmap
 Matrix matrix = new Matrix(); // 創(chuàng)建操作圖片用的 Matrix 對象
 float scaleWidth = ((float) w / width); // 計算縮放比例
 float scaleHeight = ((float) h / height);
 matrix.postScale(scaleWidth, scaleHeight); // 設(shè)置縮放比例
 Bitmap newbmp = Bitmap.createBitmap(oldbmp, 0, 0, width, height,
 matrix, true); // 建立新的 bitmap ，其內(nèi)容是對原 bitmap 的縮放后的圖
 return new BitmapDrawable(newbmp); // 把 bitmap 轉(zhuǎn)換成 drawable 并返回
 }
 
 /**
 * 將drawable 轉(zhuǎn)換成 bitmap
 * 
 * @param drawable
 * @return
 */
 public Bitmap drawableToBitmap(Drawable drawable) {
 int width = drawable.getIntrinsicWidth(); // 取 drawable 的長寬
 int height = drawable.getIntrinsicHeight();
 Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
 : Bitmap.Config.RGB_565; // 取 drawable 的顏色格式
 Bitmap bitmap = Bitmap.createBitmap(width, height, config); // 建立對應(yīng)
   // bitmap
 Canvas canvas = new Canvas(bitmap); // 建立對應(yīng) bitmap 的畫布
 drawable.setBounds(0, 0, width, height);
 drawable.draw(canvas); // 把 drawable 內(nèi)容畫到畫布中
 return bitmap;
 }
 
 // dp轉(zhuǎn)換為像素px
 public static int dip2Px(Context context, float dp) {
 final float scale = context.getResources().getDisplayMetrics().density;
 return (int) (dp * scale + 0.5f);
 }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="${relativePackage}.${activityClass}" >
 
 <ImageView
 android:id="@+id/top"
 android:layout_width="60dp"
 android:layout_height="60dp"
 android:background="@drawable/cart_product_img" 
 android:onClick="startAnim"/>
 
 <ImageView
 android:id="@+id/bottom"
 android:layout_width="60dp"
 android:layout_height="60dp"
 android:layout_alignParentBottom="true"
 android:layout_alignParentRight="true"
 android:background="@drawable/gouwuche_ico" />
 
</RelativeLayout>