带有动画效果的Gallery控件
由于项目想做得更加漂亮一些,想做一个滑动的标题栏,每个item对应各自的listview,经过几天终于写出来,先上界面效果

所有的设计思路会在下面几篇里讲述出来,这一篇先讲一下我搜到的一个朋友的说法
一次只想拨动一个item,系统的gallery轻轻一拨。。。嗖的一下跑到最后一项了,或者想做更炫的动画效果的时候就需要我们自定义一个gallery

- Android中Gallery 点击图片放大的思路:
- 第一、可以通过Matrix对象来变换图像,在选择的时候放大,在失去焦点的时候,缩小到原来的大小。
- 推荐阅读:Android gallery滑动惯性问题
- double scale = 1.2;
- int width = bm.getWidth();
- int height = bm.getHeight();
- Log.i("size:", width+"");
- float scaleWidth = (float)(scale*width);
- float scaleHeight = (float)(scale*height);
- Log.i("size:", scaleWidth+"");
- Matrix matrix = new Matrix();
- matrix.postScale(scaleWidth, scaleHeight);
- bm = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, true);
- 第二 、通过动画
- <?xml version="1.0" encoding="utf-8"?>
- <scale
- xmlns:android=
- android:interpolator="@android:anim/decelerate_interpolator"
- android:fromXScale="1"
- android:toXScale="1.1"
- android:fromYScale="1"
- android:toYScale="1.1"
- android:pivotX="50%"
- android:pivotY="50%"
- android:duration="500">
- </scale>
- 第三、通过setLayoutParams
- view.setLayoutParams(new Gallery.LayoutParams(150,150));
- int mCounts = g.getCount() - 1;
- if(position>0 && (position < mCounts))
- {
- g.getChildAt(position - 1).setLayoutParams(new Gallery.LayoutParams(136, 88));
- g.getChildAt(position + 1).setLayoutParams(new Gallery.LayoutParams(136, 88));
- }
- if(position == 0)
- {
- g.getChildAt(position + 1).setLayoutParams(new Gallery.LayoutParams(136, 88));
- }
- if(position == mCounts)
- {
- g.getChildAt(position - 1).setLayoutParams(new Gallery.LayoutParams(136, 88));
- }
- 注释:其中(136, 88)是gallery中图片的大小,是在ImageAdapter里面设置的。(150,150)是选中图片放大后的大小,可以随便设置,只要跟(136, 88)区别就行了,是为了观察变化,我设置的是150而已。
- 第四 、通过动画和LayoutParam结合
- gallery.setOnItemSelectedListener(new OnItemSelectedListener(){
- @Override
- public
- void onItemSelected(AdapterView<?> arg0, View arg1,
- int arg2, long arg3) {
- ImageView v = (ImageView)arg1;
- if(tempView != null && v.hashCode() != tempView.hashCode()){
- tempView.setLayoutParams(new Gallery.LayoutParams(50,50));
- }
- v.startAnimation(toLarge);
- tempView = v;
- v.setLayoutParams(new Gallery.LayoutParams(60,60));
- //
- //v.setLayoutParams(new Gallery.LayoutParams(130,130));
- tvName.setText(tempList.get(arg2).getPicName());
- }
- @Override,
- public
- void onNothingSelected(AdapterView<?> arg0) {
- tvName.setText("Nothing selected .");
- }
- });