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public class CustomView extends LinearLayout{

private static final String TAG = "CustomView";
private OverScroller mScroller;
private float init_x, end_x, start_x, final_x;
private ScaleAnimation animation, animation1;
private Context context;
private View layout_bitmap;
private LinearLayout.LayoutParams lp_big,lp_small;

private int width_big,height_big,width_small,height_small,distance,Top_distance;
private float width_scale_big = 1.0f,height_scale_big = 1.0f;
private float width_scale_small = 1.0f,height_scale_small = 1.0f;
private int slect_num = 0,first_num = 0,delay_multiple = 0,scroll_direct = 0;
private final int max_num = 7,animation_delaytime = 150;

private final int SCROLL_ONE = 1,SCROLL_TWO = 2,SCROLL_THREE = 3,
SCROLL_FOUR = 4,SCROLL_FIVE = 5,SCROLL_SIX = 6,CLICK_STATE = 10;
public static final String ACTION_CLICK_ONE = "com.example.deskscroll.clickone";
private boolean mScrolling = false;

public CustomView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
getScrollwidth_height();
mScroller = new OverScroller(context);
animation = new ScaleAnimation(0.8f, 1.0f, 0.8f, 1.0f);//(width_scale_small,width_scale_big,height_scale_small,height_scale_big);//
animation1 = new ScaleAnimation(1.1f, 1.0f, 1.1f, 1.0f);//(width_scale_big,width_scale_small,height_scale_big,height_scale_small);//
animation.setDuration(300);
animation1.setDuration(100);
//animation.setFillAfter(true);
//animation1.setFillAfter(true);
OnTimer_trace();
Log.i(TAG, "slect_num = "+slect_num+" first_num = "+first_num + "click_num = "+MainActivity.click_num);
initView();
}

private void initView(){
Log.i(TAG, " MainActivity.first_temp = "+MainActivity.first_temp+"first_num = "+first_num);
if(first_num != MainActivity.first_temp){
if(MainActivity.first_temp - first_num > 0)
smoothScrollBy((width_small+10)*(MainActivity.first_temp - first_num), 0);

first_num = MainActivity.first_temp;
}
lp_big = new LinearLayout.LayoutParams(width_big, height_big);
lp_small = new LinearLayout.LayoutParams(width_small, height_small);
}

public void getScrollwidth_height(){
DisplayMetrics dm = new DisplayMetrics();

((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE))
.getDefaultDisplay().getMetrics(dm);
//设置窗口的大小
if(dm.widthPixels==1024){ //1024*600
width_big = 235;
height_big = 280;
width_small = 182;
height_small = 200;
distance = 10;
Top_distance = 12;
}
else{ //800*480
width_big = 180;
height_big = 280;
width_small = 140;
height_small = 200;
distance = 10;
Top_distance = 8;
}

Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.backcar_d);
int height = bitmap.getHeight();
int width= bitmap.getWidth();
width_scale_big = (float)width_big/width;
height_scale_big = (float)height_big/height;
width_scale_small = (float)width_small/width;
height_scale_small = (float)height_small/height;

//Log.i(TAG, "width_scale_big = "+width_scale_big+" width_scale_small = "+width_scale_small);
}

// 调用此方法滚动到目标位置
public void smoothScrollTo(int fx, int fy) {
int dx = fx - mScroller.getFinalX();
int dy = fy - mScroller.getFinalY();
smoothScrollBy(dx, dy);
}

// 调用此方法设置滚动的相对偏移
public void smoothScrollBy(int dx, int dy) {

// 设置mScroller的滚动偏移量
mScroller.startScroll(mScroller.getFinalX(), mScroller.getFinalY(), dx, dy);
invalidate();// 这里必须调用invalidate()才能保证computeScroll()会被调用，否则不一定会刷新界面，看不到滚动效果
}

@Override
public void computeScroll() {

// 先判断mScroller滚动是否完成
if (mScroller.computeScrollOffset()) {
//true 说明滚动尚未完成
// 这里调用View的scrollTo()完成实际的滚动
scrollTo(mScroller.getCurrX(), mScroller.getCurrY());

// 必须调用该方法，否则不一定能看到滚动效果
postInvalidate();
}
super.computeScroll();
}

@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
Log.i(TAG, "ACTION_MOVE");
end_x = event.getRawX();
if (start_x - end_x > 60) { // 左移
scroll_direct = 1;
delay_multiple++;
switch (delay_multiple) {
case 1:
myHandler.sendEmptyMessageDelayed(SCROLL_ONE, 0);
break;
case 2:
myHandler.sendEmptyMessageDelayed(SCROLL_TWO, animation_delaytime * 1);
break;
case 3:
myHandler.sendEmptyMessageDelayed(SCROLL_THREE, animation_delaytime * 2);
break;
case 4:

myHandler.sendEmptyMessageDelayed(SCROLL_FOUR, animation_delaytime * 3);
break;
case 5:
myHandler.sendEmptyMessageDelayed(SCROLL_FIVE, animation_delaytime * 4);
break;
default:
break;
}

} else if (end_x - start_x > 60) {
scroll_direct = 0;
delay_multiple++;
switch (delay_multiple) {
case 1:
myHandler.sendEmptyMessageDelayed(SCROLL_ONE, 0);
break;
case 2:
myHandler.sendEmptyMessageDelayed(SCROLL_TWO, animation_delaytime * 1);
break;
case 3:

myHandler.sendEmptyMessageDelayed(SCROLL_THREE, animation_delaytime * 2);
break;
case 4:
myHandler.sendEmptyMessageDelayed(SCROLL_FOUR, animation_delaytime * 3);
break;
case 5:
myHandler.sendEmptyMessageDelayed(SCROLL_FIVE, animation_delaytime * 4);
break;
default:
break;
}
}
if (Math.abs(end_x - start_x) > 60)
start_x = end_x;
break;

case MotionEvent.ACTION_DOWN:
Log.i(TAG, "ACTION_DOWN");
myHandler.removeMessages(SCROLL_ONE);
myHandler.removeMessages(SCROLL_TWO);
myHandler.removeMessages(SCROLL_THREE);
myHandler.removeMessages(SCROLL_FOUR);
myHandler.removeMessages(SCROLL_FIVE);
init_x = event.getRawX();
delay_multiple = 0;
break;
case MotionEvent.ACTION_UP:
Log.i(TAG, "ACTION_UP");
break;
default:
break;
}
return true;
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
// TODO Auto-generated method stub
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
myHandler.removeMessages(SCROLL_ONE);
myHandler.removeMessages(SCROLL_TWO);
myHandler.removeMessages(SCROLL_THREE);
myHandler.removeMessages(SCROLL_FOUR);
myHandler.removeMessages(SCROLL_FIVE);
delay_multiple = 0;
Log.i("daxiang", "custom:onInterceptTouchEvent--down");
start_x = ev.getRawX();
mScrolling = false;
break;

case MotionEvent.ACTION_MOVE:
Log.i("daxiang", "custom:onInterceptTouchEvent--move");
if (Math.abs(start_x - ev.getRawX()) >= 0) {
mScrolling = true;
} else {
mScrolling = false;
}
break;
case MotionEvent.ACTION_UP:
Log.i("daxiang", "custom:onInterceptTouchEvent--up");
mScrolling = false;
break;

default:
break;
}
return mScrolling;

}

public void scroll_process(int right_left) {
Log.i("yxl", "slect_num = " + slect_num + " first_num = " + first_num);
if (right_left == 1) {// 左移
if (slect_num < max_num) {
if (slect_num - first_num < 4) {
slect_num++;
smoothScrollBy(0, 0);
} else {
slect_num++;
first_num++;
smoothScrollBy(width_small+distance, 0);
}
MainActivity.click_num = slect_num;
set_anim(getChildAt(slect_num), getChildAt(slect_num - 1));
getChildAt(slect_num).setLayoutParams(lp_big);
lp_big.setMargins(distance, Top_distance, 0, 0);
((TextView) getChildAt(slect_num)).setTextSize(25);

getChildAt(slect_num - 1).setLayoutParams(lp_small);
((TextView) getChildAt(slect_num - 1)).setTextSize(20);
lp_small.setMargins(distance, 0, 0, 0);

if (mOnInfoChange != null) {
mOnInfoChange.onAction(slect_num,first_num);
}
}
}
else{//右移
if(slect_num > 0){
if(slect_num - first_num > 0){
slect_num--;
smoothScrollBy(0, 0);
}
else{

slect_num--;
first_num--;
smoothScrollBy(-width_small-distance, 0);
}
MainActivity.click_num = slect_num;
set_anim(getChildAt(slect_num), getChildAt(slect_num + 1));

getChildAt(slect_num).setLayoutParams(lp_big);
lp_big.setMargins(distance, Top_distance, 0, 0);
((TextView) getChildAt(slect_num)).setTextSize(25);

getChildAt(slect_num + 1).setLayoutParams(lp_small);
lp_small.setMargins(distance, 0, 0, 0);
((TextView) getChildAt(slect_num + 1)).setTextSize(20);

if (mOnInfoChange != null) {
mOnInfoChange.onAction(slect_num,first_num);
}
}
}

}
public void set_anim(View view, View view2) {
view.startAnimation(animation);
view2.startAnimation(animation1);
}


public void click_process(int click_num){
Log.i(TAG, "click_num = "+click_num);
set_anim(getChildAt(click_num), getChildAt(slect_num));
getChildAt(click_num).setLayoutParams(lp_big);
lp_big.setMargins(distance, Top_distance, 0, 0);
((TextView)getChildAt(click_num)).setTextSize(25);

getChildAt(slect_num).setLayoutParams(lp_small);
lp_small.setMargins(distance, 0, 0, 0);
((TextView)getChildAt(slect_num)).setTextSize(20);
slect_num = click_num;

if (mOnInfoChange != null) {
mOnInfoChange.onAction(slect_num,first_num);
}
}

public void OnTimer_trace() {
Timer timer = new Timer();
timer.schedule(new TimerTask() {
public void run() {

myHandler.sendEmptyMessageDelayed(CLICK_STATE, 0);
}
}, 0, 100);
}

Handler myHandler = new Handler() {
public void handleMessage(Message msg) {
switch(msg.what){
case CLICK_STATE:

myHandler.removeMessages(CLICK_STATE);
if(slect_num != MainActivity.click_num)
click_process(MainActivity.click_num);
break;
case SCROLL_ONE:
case SCROLL_TWO:
case SCROLL_THREE:
case SCROLL_FOUR:
case SCROLL_FIVE:
scroll_process(scroll_direct);
break;
}

}
};

public int getSlectNum(){
return slect_num;
}

public int getFirstNum(){
return first_num;
}
  public interface OnInfoChangeSlect{
public void onAction(int slect_num,int first_num);
}
private static OnInfoChangeSlect mOnInfoChange = null;

public static void setOnInfoChange(OnInfoChangeSlect mOnInfoChangeSlect){
mOnInfoChange = mOnInfoChangeSlect;
}
}

一个左右拖动的控件

请标注原文地址：http://write.blog.csdn.net/postedit

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