好久没有写博客了,上一篇博文距现在都有七个多月了,实在是惭愧。但是这段时间仍然是在忙于项目或是自我充电。这几天实现了一个基于GridView的翻牌动画效果,这里就将其整理出来同各位分享。
一、整体介绍
GridView设置15个Item(5*3),刚好满屏显示(没有ScrollBar),没有点击某个Item前可以使用摇一摇功能对GridView中的图片进行切换,点击某个Item时对应的图片放大,然后实现“翻牌”效果,并将该Item中显示的图片切换为对应的文字。随后所有其他的Item也自动实现翻牌效果。
(1)目录结构
(2)效果图
二、详细介绍
按上面的目录结构从上致下
1、GridAdapter 继承至 BaseAdapter
重点代码:
(1)自定义的一个Item touch事件监听接口
1 public interface OnItemTouchedListener {
2 public boolean onItemTouch (View v, MotionEvent event, int position);
3 }
(2)设置OnItemTouchedListener
1 public void setOnItemTouchedListener(OnItemTouchedListener onItemTouchedListener) {
2 this.listener = onItemTouchedListener;
3 }
(3)getView()函数中动态设置 Item的高、宽加载网络图片为每个Item设置OnTouchListener
1 @Override
2 public View getView(final int position, View convertView, ViewGroup parent) {
3 LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
4 convertView = inflater.inflate(R.layout.grid_item, parent, false);
5
6 LayoutParams layoutParams = convertView.getLayoutParams();
7 layoutParams.width = viewWidth;
8 layoutParams.height = viewHeight;
9 convertView.setLayoutParams(layoutParams);
10 ImageView imageView = (ImageView) convertView.findViewById(R.id.grid_image);
11
12 DisplayImageOptions options = new DisplayImageOptions.Builder()//
13 .cacheInMemory(true)//
14 .cacheOnDisc(true)//
15 .bitmapConfig(Config.RGB_565)//
16 .build();
17 ImageLoader.getInstance().displayImage(urlArray.get(position),
18 imageView, options);
19 convertView.setOnTouchListener(new OnTouchListener() {
20
21 @Override
22 public boolean onTouch(View v, MotionEvent event) {
23
24 return listener.onItemTouch(v, event, position);
25 }
26 });
27
28 return convertView;
29 }
2、RotateAnimation
参考于github上jianghejie的3DNumberRotate项目中的NumberRotate3DAnimation类,基于Camera实现数字3D翻转动画。
3、自定义的Application类
项目中使用了universal-image-loader加载网络图片,在这里对ImageLoader进行初始化:
1 private void initImageLoader() {
2
3 DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder() //
4 .showImageForEmptyUri(R.mipmap.empty_img) //
5 .showImageOnFail(R.mipmap.empty_img) //
6 .cacheInMemory(true) //
7 .cacheOnDisc(true) //
8 .build();//
9
10 File cacheDir = StorageUtils.getCacheDirectory(getApplicationContext());
11 ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
12 getApplicationContext())//
13 .memoryCache(new LruMemoryCache(5 * 1024 * 1024))//
14 .memoryCacheSize(10 * 1024 * 1024)//
15 .defaultDisplayImageOptions(defaultOptions)//
16 .discCache(new UnlimitedDiscCache(cacheDir))//
17 .discCacheFileNameGenerator(new HashCodeFileNameGenerator())//
18 .build();
19 ImageLoader.getInstance().init(config);
20 }
4、util包中的几个工具类
(1)Constants:放一些常量,这里我存放的是GridView中网络图片的路径;
(2)DisplayUtil:这是关于显示的一个工具类,包括获取屏幕高宽、dp转px等功能;
(3)ItemCenterMeasure:这个类是设计用来根据GridView高宽计算Item尺寸的,其实可以省去,或者直接归并到DisplayUtil中;
5、MainActivity中功能较多写的比较杂乱
主要代码:
(1)Adapter设置自定义的OnItemTouchedListener
1 mAdapter.setOnItemTouchedListener(new GridAdapter.OnItemTouchedListener() {
2
3 @Override
4 public boolean onItemTouch(View v, MotionEvent event, int position) {
5 mView = v;
6 currentPos = position;
7 if(event.getAction() == MotionEvent.ACTION_DOWN){
8 if (isClicked) {
9 Toast toast = Toast.makeText(context, getString(R.string.warning),
10 Toast.LENGTH_SHORT);
11 toast.setGravity(Gravity.CENTER, 0, 0);
12 toast.show();
13 return false;
14 } else{
15 //play sound
16 soundPool.play(music, 1, 1, 0, 0, 1);
17 //trigger zoom animation on items
18 ScaleAnimation scaleAnimation = new ScaleAnimation(1.0f, 1.1f, 1.0f, 1.1f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
19 scaleAnimation.setDuration(500);
20 AnimationSet animationSet = new AnimationSet(true);
21 animationSet.addAnimation(scaleAnimation);
22 animationSet.setFillAfter(true);
23 animationSet.setAnimationListener(new Animation.AnimationListener() {
24
25 @Override
26 public void onAnimationStart(Animation animation) {
27
28 }
29
30 @Override
31 public void onAnimationRepeat(Animation animation) {
32
33 }
34
35 @Override
36 public void onAnimationEnd(Animation animation) {
37 enableRefreshFirst = true;
38 RotateAnimation rotateAnim = null;
39
40 float cX = mView.getWidth() / 2.0f;
41 float cY = mView.getHeight() / 2.0f;
42 rotateAnim = new RotateAnimation(cX, cY);
43
44 if (rotateAnim != null) {
45 rotateAnim.setInterpolatedTimeListener(MainActivity.this, mView);
46 rotateAnim.setFillAfter(true);
47 rotateAnim.setAnimationListener(new Animation.AnimationListener() {
48
49 @Override
50 public void onAnimationStart(Animation animation) {
51
52 }
53
54 @Override
55 public void onAnimationRepeat(Animation animation) {
56
57 }
58
59 @Override
60 public void onAnimationEnd(Animation animation) {
61 handler.postDelayed(new Runnable() {
62
63 @Override
64 public void run() {
65 otherItemRotate();
66 }
67 }, 500);
68 }
69 });
70 mView.startAnimation(rotateAnim);
71
72 }
73
74 isClicked = true;
75 }
76 });
77 v.startAnimation(animationSet);
78 }
79 }
80
81 return false;
82 }
83 });
(2)动态创建一个TextView,并算出GridView的高、宽
其中计算GridView的高度这一句(DisplayUtil.SCREEN_HEIGHT_PIXELS - DisplayUtil.dp2px(16) * 2 - tvBmHeight - 80)在我设备(分辨率:1920*1080)上要减去80px才能使所有的Item整好全部显示出来,不知道为什么,如果不减去80px,GridViw 中的最后一行Item将会显示不完全也就是说要通过滑动ScrollBar才能看全。这一点还望大神能给予指点。
1 private void createCRTextView() {
2 LinearLayout ll = (LinearLayout) findViewById(R.id.logo_ly);
3 tvBm = new TextView(context);
4 tvBm.setText(getResources().getString(R.string.logo));
5 tvBm.setTextAppearance(context, R.style.logoTextView);
6 LinearLayout.LayoutParams crParams = new LinearLayout.LayoutParams(GridLayout.LayoutParams.WRAP_CONTENT, GridLayout.LayoutParams.WRAP_CONTENT);
7 crParams.topMargin = 5;
8 crParams.bottomMargin = 10;
9 crParams.gravity = Gravity.CENTER;
10 tvBm.setLayoutParams(crParams);
11
12 tvBm.setOnClickListener(new View.OnClickListener() {
13
14 @Override
15 public void onClick(View v) {
16 ScaleAnimation scaleAnim = new ScaleAnimation(1.0f, 1.2f, 1.0f, 1.2f,
17 Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
18 scaleAnim.setDuration(500);
19 scaleAnim.setFillAfter(false);
20 tvBm.startAnimation(scaleAnim);
21 }
22 });
23
24 ll.addView(tvBm);
25 int tvBmHeight = crParams.height + 5 + 10;
26
27
28 gridWidthPix = DisplayUtil.SCREEN_WIDTH_PIXELS - DisplayUtil.dp2px(16) * 2;
29 //I am not sure why the right of next equality should minus 80px to display all items in the gridview without scrollbar in my devices (1 920*1080),
30 //this may make a bad adaption for various devices with different resolution ratio
31 gridHeightPix = DisplayUtil.SCREEN_HEIGHT_PIXELS - DisplayUtil.dp2px(16) * 2 - tvBmHeight - 80;
32
33
34 }
(3)摇一摇触发的时候更新GridView中的图片路径
@Override
public void onSensorChanged(SensorEvent event) {
int sensorType = event.sensor.getType();
float[] values = event.values;
if (sensorType == Sensor.TYPE_ACCELEROMETER) {
//values[0] X axis acceleration;values[1] Y axis acceleration;values[2] Z axis acceleration
if (Math.abs(values[0]) > 17 || Math.abs(values[1]) > 17 || Math.abs(values[2]) > 17) {
if (!isClicked) {
vibrator.vibrate(500);
mAdapter.setUrls(Constants.getUrls(2));
mGridView.invalidate();
}
}
}
}
6、还有一个自定义的GridView,实现禁止滑动
重写dispatchTouchEvent方法
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_MOVE) {
return true;//禁止gridview滑动
}
return super.dispatchTouchEvent(ev);
}
7、布局文件这里就不给予说明了,很简单明了的,需要参考的可以直接下源码看。
源码下载链接:
(1)CSDN:需要1个下载积分,积分有点缺您要是愿意打赏请点这里下载;
(2)GitHub:实在吝啬或是没有积分也没关系,请到这里下载,当然也希望你Start一下,或是Fork;
好了到此算是写完了,如果对您有用,劳烦您点个赞或是分享一下;如果您对代码有一些建议,期待您在评论处给予指正。
最近状态有点不佳,送给自己以及各位一句话共勉:
业精于勤 荒于嬉;行成于思 毁于随