下载动画经常出现在下载需求多的app中，比如游戏下载平台，应用市场……
先看看效果图：
实现
private void startAnim() {
//以bitmap创建new ImageView
iv.setDrawingCacheEnabled(true);
Bitmap bitmap = iv.getDrawingCache();
ImageView logo = new ImageView(this);
logo.setScaleType(ImageView.ScaleType.FIT_XY);
logo.setImageBitmap(bitmap);
int[] startLocation = new int[2];
iv.getLocationInWindow(startLocation);
end.getLocationInWindow(location_download);
setAnim(logo, startLocation, location_download);
}
设置动画
private void setAnim(final ImageView logo, int[] startLocation,int[] location_download) {
ViewGroup animMaskLayout = createAnimLayout();
animMaskLayout.addView(logo);// 把动画小球添加到动画层
// 计算位移
final View view = addViewToAnimLayout(logo, startLocation);
// 动画位移的X坐标
int endY = location_download[1] - startLocation[1];
// 动画位移的y坐标
TranslateAnimation translateAnimationX = new TranslateAnimation(0, endX, 0, 0);
translateAnimationX.setInterpolator(new LinearInterpolator());
translateAnimationX.setRepeatCount(0);// 动画重复执行的次数
translateAnimationX.setFillAfter(true); TranslateAnimation
translateAnimationY = new TranslateAnimation(0, 0, 0, endY);
translateAnimationY.setInterpolator(new AccelerateInterpolator());
translateAnimationY.setRepeatCount(0);// 动画重复执行的次数
translateAnimationX.setFillAfter(true); AnimationSet set = new
AnimationSet(false);
set.setFillAfter(false);
set.addAnimation(translateAnimationY);
set.addAnimation(translateAnimationX);
set.setDuration(2000);// 动画的执行时间
view.startAnimation(set); // 动画监听事件
set.setAnimationListener(new Animation.AnimationListener() {
// 动画的开始
@Override
public void onAnimationStart(Animation animation) {
logo.setVisibility(View.VISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
// 动画的结束
@Override
public void onAnimationEnd(Animation animation) {
logo.setVisibility(View.GONE);
}
});
}
创建动画父布局
private ViewGroup createAnimLayout() {
ViewGroup rootView = (ViewGroup) 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;
}
设置动画布局参数
private static View addViewToAnimLayout(final View view, int[] location) {
int x = location[0];
int y = location[1];
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(80, 80);
lp.leftMargin = x;
lp.topMargin = y;
view.setLayoutParams(lp);
return view;
}
代码就到此结束了，看起来并不难，动手试试吧。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持找一找教程网。
