滑动效果的View

像汽车之家找车界面点击后出现出现一个侧边栏，侧边栏可以根据手势滑动而滑动。

那我们就要自定义可以滑动的RelativeLayout, 当我们要使用 此功能的时候，需要将该Activity的顶层布局设置为SildingFinishLayout，然后需要调用setTouchView()方法来设置需要滑动的View

现在就上代码说话：

自定义SildingFinishLayout .java

public class SildingFinishLayout extends RelativeLayout implements
OnTouchListener {
/**
* SildingFinishLayout布局的父布局
*/
private ViewGroup mParentView;
/**
* 处理滑动逻辑的View
*/
private View touchView;
/**
* 滑动的最小距离
*/
private int mTouchSlop;
/**
* 按下点的X坐标
*/
private int downX;
/**
* 按下点的Y坐标
*/
private int downY;
/**
* 临时存储X坐标
*/
private int tempX;
/**
* 滑动类
*/
private Scroller mScroller;
/**
* SildingFinishLayout的宽度
*/
private int viewWidth;
/**
* 记录是否正在滑动
*/
private boolean isSilding;

private OnSildingFinishListener onSildingFinishListener;
private boolean isFinish;

public SildingFinishLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public SildingFinishLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);

mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
mScroller = new Scroller(context);
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
if (changed) {
// 获取SildingFinishLayout所在布局的父布局
mParentView = (ViewGroup) this.getParent();
viewWidth = this.getWidth();
}
}

/**
* 设置OnSildingFinishListener, 在onSildingFinish()方法中finish Activity
*
* @param onSildingFinishListener
*/
public void setOnSildingFinishListener(
OnSildingFinishListener onSildingFinishListener) {
this.onSildingFinishListener = onSildingFinishListener;
}

/**
* 设置Touch的View
*
* @param touchView
*/
public void setTouchView(View touchView) {
this.touchView = touchView;
touchView.setOnTouchListener(this);
}

public View getTouchView() {
return touchView;
}

/**
* 滚动出界面
*/
private void scrollRight() {
final int delta = (viewWidth + mParentView.getScrollX());
// 调用startScroll方法来设置一些滚动的参数，我们在computeScroll()方法中调用scrollTo来滚动item
mScroller.startScroll(mParentView.getScrollX(), 0, -delta + 1, 0,
Math.abs(delta));
postInvalidate();
}

/**
* 滚动到起始位置
*/
private void scrollOrigin() {
int delta = mParentView.getScrollX();
mScroller.startScroll(mParentView.getScrollX(), 0, -delta, 0,
Math.abs(delta));
postInvalidate();
}

/**
* touch的View是否是AbsListView， 例如ListView, GridView等其子类
*
* @return
*/
private boolean isTouchOnAbsListView() {
return touchView instanceof AbsListView;
}

/**
* touch的View是否是StickyListHeadersListView
*
* @return
*/
private boolean isTouchOnStickyListHeadersListView() {
return touchView instanceof StickyListHeadersListView;
}

/**
* touch的view是否是ScrollView或者其子类
*
* @return
*/
private boolean isTouchOnScrollView() {
return touchView instanceof ScrollView;
}

@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
downX = tempX = (int) event.getRawX();
downY = (int) event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
int moveX = (int) event.getRawX();
int deltaX = tempX - moveX;
tempX = moveX;
if (Math.abs(moveX - downX) > mTouchSlop
&& Math.abs((int) event.getRawY() - downY) < mTouchSlop) {
isSilding = true;

// 若touchView是AbsListView，
// 则当手指滑动，取消item的点击事件，不然我们滑动也伴随着item点击事件的发生
if (isTouchOnAbsListView() ||isTouchOnStickyListHeadersListView() ) {
MotionEvent cancelEvent = MotionEvent.obtain(event);
cancelEvent
.setAction(MotionEvent.ACTION_CANCEL
| (event.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));
v.onTouchEvent(cancelEvent);
}

}

if (moveX - downX >= 0 && isSilding) {
mParentView.scrollBy(deltaX, 0);
// 屏蔽在滑动过程中ListView ScrollView等自己的滑动事件
if (isTouchOnScrollView() || isTouchOnAbsListView() || isTouchOnStickyListHeadersListView()) {
return true;
}
}
break;
case MotionEvent.ACTION_UP:
isSilding = false;
if (mParentView.getScrollX() <= -viewWidth / 2) {
isFinish = true;
scrollRight();
} else {
scrollOrigin();
isFinish = false;
}
break;
}

// 假如touch的view是AbsListView或者ScrollView 我们处理完上面自己的逻辑之后
// 再交给AbsListView, ScrollView自己处理其自己的逻辑
if (isTouchOnScrollView() || isTouchOnAbsListView() || isTouchOnStickyListHeadersListView()) {
return v.onTouchEvent(event);
}

// 其他的情况直接返回true
return true;
}

@Override
public void computeScroll() {
// 调用startScroll的时候scroller.computeScrollOffset()返回true，
if (mScroller.computeScrollOffset()) {
mParentView.scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
postInvalidate();

if (mScroller.isFinished()) {

if (onSildingFinishListener != null && isFinish) {
onSildingFinishListener.onSildingFinish();
} else {
//如果没有设置回调接口, 直接划到起始位置
//                    scrollOrigin();
}
}
}
}

public interface OnSildingFinishListener {
public void onSildingFinish();
}

}

xml运用：

<com.jeff.view.SildingFinishLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/sildingFinishLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/second_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/view_line"
android:scrollbars="vertical" />

</com.jeff.view.SildingFinishLayout>

在Activity中直接调用setTouchView()：

......

ListView listView = (ListView) view.findViewById(R.id.listView);
SildingFinishLayout mSildingFinishLayout = (SildingFinishLayout) view.findViewById(R.id.sildingFinishLayout);
mSildingFinishLayout.setOnSildingFinishListener(new SildingFinishLayout.OnSildingFinishListener() {
@Override
public void onSildingFinish() {
getActivity().finish();
}
});
mSildingFinishLayout.setTouchView(listView);
.....

感谢大家的支持