商品詳情頁
有需要做電商類app的童鞋可以看看, 首先先看看效果實作
- 開發工具:
- Android Studio
- 使用的第三方架構:
- 加載網絡圖檔使用的 Fresco
- 頭部的商品圖輪播 ConvenientBanner
- 導航欄切換 PagerSlidingTabStrip
-
項目源碼
Android仿京東、天貓app的商品詳情頁的布局架構, 以及功能實作 商品詳情頁 效果圖
由于代碼量過多, 就不一一講解隻介紹幾個核心的自定義控件
不想看的童鞋可以下載下傳apk或者在github上下載下傳源碼使用
-
最外層的布局檔案
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!-- 頂部标題 -->
<LinearLayout
android:id="@+id/ll_title_root"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ec0f38"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="44dp"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/ll_back"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:paddingLeft="15dp">
<ImageView
android:id="@+id/iv_back"
android:layout_width="22dp"
android:layout_height="22dp"
android:layout_gravity="center_vertical"
android:src="@mipmap/address_come_back" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center">
<!-- 商品、詳情、評價切換的控件 -->
<com.gxz.PagerSlidingTabStrip
android:id="@+id/psts_tabs"
android:layout_width="wrap_content"
android:layout_height="32dp"
android:layout_gravity="center"
android:textColor="#ffffff"
android:textSize="15sp"
app:pstsDividerColor="@android:color/transparent"
app:pstsDividerPaddingTopBottom="0dp"
app:pstsIndicatorColor="#ffffff"
app:pstsIndicatorHeight="2dp"
app:pstsScaleZoomMax="0.0"
app:pstsShouldExpand="false"
app:pstsSmoothScrollWhenClickTab="false"
app:pstsTabPaddingLeftRight="12dp"
app:pstsTextAllCaps="false"
app:pstsTextSelectedColor="#ffffff"
app:pstsUnderlineHeight="0dp" />
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="圖文詳情"
android:textColor="#ffffff"
android:textSize="15sp"
android:visibility="gone" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
<!-- 功能下面有介紹 -->
<com.hq.hsmwan.widget.NoScrollViewPager
android:id="@+id/vp_content"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
</LinearLayout>
-
ItemWebView是
的子View (SlideDetailsLayout代碼太多, 放到了最後)SlideDetailsLayout
- 功能為顯示商品簡介的
Webview
- 防止往上滑動時會直接滑動到第一個
View
- 實作滑動到
頂部時, 讓父控件重新獲得觸摸事件WebView
- 功能為顯示商品簡介的
/**
* 商品詳情頁底部的webview
*/
public class ItemWebView extends WebView {
public float oldY;
private int t;
private float oldX;
public ItemWebView(Context context) {
super(context);
}
public ItemWebView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ItemWebView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_MOVE:
float Y = ev.getY();
float Ys = Y - oldY;
float X = ev.getX();
//滑動到頂部讓父控件重新獲得觸摸事件
if (Ys > && t == ) {
getParent().getParent().requestDisallowInterceptTouchEvent(false);
}
break;
case MotionEvent.ACTION_DOWN:
getParent().getParent().requestDisallowInterceptTouchEvent(true);
oldY = ev.getY();
oldX = ev.getX();
break;
case MotionEvent.ACTION_UP:
getParent().getParent().requestDisallowInterceptTouchEvent(true);
break;
default:
break;
}
return super.onTouchEvent(ev);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
this.t = t;
super.onScrollChanged(l, t, oldl, oldt);
}
}
-
ItemListView 也是
的子ViewSlideDetailsLayout
- 跟
功能大緻一樣ItemWebView
- 當然這裡不隻是
可以, 其他的控件都可以寫成這樣來适配ListView
的滑動功能SlideDetailsLayout
- 跟
/**
* 商品詳情頁底部的ListView
*/
public class ItemListView extends ListView implements AbsListView.OnScrollListener {
private float oldX, oldY;
private int currentPosition;
public ItemListView(Context context) {
super(context);
setOnScrollListener(this);
}
public ItemListView(Context context, AttributeSet attrs) {
super(context, attrs);
setOnScrollListener(this);
}
public ItemListView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setOnScrollListener(this);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_MOVE:
float Y = ev.getY();
float Ys = Y - oldY;
float X = ev.getX();
int [] location = new int [];
getLocationInWindow(location);
//滑動到頂部讓父控件重新獲得觸摸事件
if (Ys > && currentPosition == ) {
getParent().getParent().requestDisallowInterceptTouchEvent(false);
}
break;
case MotionEvent.ACTION_DOWN:
getParent().getParent().requestDisallowInterceptTouchEvent(true);
oldY = ev.getY();
oldX = ev.getX();
break;
case MotionEvent.ACTION_UP:
getParent().getParent().requestDisallowInterceptTouchEvent(true);
break;
default:
break;
}
return super.onTouchEvent(ev);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
currentPosition = getFirstVisiblePosition();
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
}
}
-
NoScrollViewPager為最外層的父布局
- 當滑動到圖文詳情子產品時, 能禁止掉
的滑動事件ViewPager
- 大概意思就是滑動跟到了圖文詳情時不能直接向右滑動的方式切換到詳情和評價子產品(參照京東淘寶功能)
- 當滑動到圖文詳情子產品時, 能禁止掉
/**
* 提供禁止滑動功能的自定義ViewPager
*/
public class NoScrollViewPager extends ViewPager {
private boolean noScroll = false;
public NoScrollViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
public NoScrollViewPager(Context context) {
super(context);
}
public void setNoScroll(boolean noScroll) {
this.noScroll = noScroll;
}
@Override
public void scrollTo(int x, int y) {
super.scrollTo(x, y);
}
@Override
public boolean onTouchEvent(MotionEvent arg0) {
if (noScroll)
return false;
else
return super.onTouchEvent(arg0);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
if (noScroll)
return false;
else
return super.onInterceptTouchEvent(arg0);
}
@Override
public void setCurrentItem(int item, boolean smoothScroll) {
super.setCurrentItem(item, smoothScroll);
}
@Override
public void setCurrentItem(int item) {
super.setCurrentItem(item);
}
}
-
商品子產品最外層的布局是一個自定義的ViewGroup名為
SlideDetailsLayout
内容有兩個SlideDetailsLayout
,View
(第一個mFrontView
)和View
(第二個mBehindView
View
)
有兩種狀态, 狀态設定為close就顯示第一個商品資料
, open狀态就顯示第二個圖文詳情View
View
@SuppressWarnings("unused")
public class SlideDetailsLayout extends ViewGroup {
/**
* Callback for panel OPEN-CLOSE status changed.
*/
public interface OnSlideDetailsListener {
/**
* Called after status changed.
*
* @param status {@link Status}
*/
void onStatucChanged(Status status);
}
public enum Status {
/** Panel is closed */
CLOSE,
/** Panel is opened */
OPEN;
public static Status valueOf(int stats) {
if ( == stats) {
return CLOSE;
} else if ( == stats) {
return OPEN;
} else {
return CLOSE;
}
}
}
private static final float DEFAULT_PERCENT = ;
private static final int DEFAULT_DURATION = ;
private View mFrontView;
private View mBehindView;
private float mTouchSlop;
private float mInitMotionY;
private float mInitMotionX;
private View mTarget;
private float mSlideOffset;
private Status mStatus = Status.CLOSE;
private boolean isFirstShowBehindView = true;
private float mPercent = DEFAULT_PERCENT;
private long mDuration = DEFAULT_DURATION;
private int mDefaultPanel = ;
private OnSlideDetailsListener mOnSlideDetailsListener;
public SlideDetailsLayout(Context context) {
this(context, null);
}
public SlideDetailsLayout(Context context, AttributeSet attrs) {
this(context, attrs, );
}
public SlideDetailsLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SlideDetailsLayout, defStyleAttr, );
mPercent = a.getFloat(R.styleable.SlideDetailsLayout_percent, DEFAULT_PERCENT);
mDuration = a.getInt(R.styleable.SlideDetailsLayout_duration, DEFAULT_DURATION);
mDefaultPanel = a.getInt(R.styleable.SlideDetailsLayout_default_panel, );
a.recycle();
mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
}
/**
* Set the callback of panel OPEN-CLOSE status.
*
* @param listener {@link OnSlideDetailsListener}
*/
public void setOnSlideDetailsListener(OnSlideDetailsListener listener) {
this.mOnSlideDetailsListener = listener;
}
/**
* Open pannel smoothly.
*
* @param smooth true, smoothly. false otherwise.
*/
public void smoothOpen(boolean smooth) {
if (mStatus != Status.OPEN) {
mStatus = Status.OPEN;
final float height = -getMeasuredHeight();
animatorSwitch(, height, true, smooth ? mDuration : );
}
}
/**
* Close pannel smoothly.
*
* @param smooth true, smoothly. false otherwise.
*/
public void smoothClose(boolean smooth) {
if (mStatus != Status.CLOSE) {
mStatus = Status.CLOSE;
final float height = -getMeasuredHeight();
animatorSwitch(height, , true, smooth ? mDuration : );
}
}
/**
* Set the float value for indicate the moment of switch panel
*
* @param percent (0.0, 1.0)
*/
public void setPercent(float percent) {
this.mPercent = percent;
}
@Override
protected LayoutParams generateDefaultLayoutParams() {
return new MarginLayoutParams(MarginLayoutParams.WRAP_CONTENT, MarginLayoutParams.WRAP_CONTENT);
}
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MarginLayoutParams(getContext(), attrs);
}
@Override
protected LayoutParams generateLayoutParams(LayoutParams p) {
return new MarginLayoutParams(p);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
final int childCount = getChildCount();
if ( >= childCount) {
throw new RuntimeException("SlideDetailsLayout only accept childs more than 1!!");
}
mFrontView = getChildAt();
mBehindView = getChildAt();
// set behindview's visibility to GONE before show.
//mBehindView.setVisibility(GONE);
if(mDefaultPanel == ){
post(new Runnable() {
@Override
public void run() {
smoothOpen(false);
}
});
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int pWidth = MeasureSpec.getSize(widthMeasureSpec);
final int pHeight = MeasureSpec.getSize(heightMeasureSpec);
final int childWidthMeasureSpec =
MeasureSpec.makeMeasureSpec(pWidth, MeasureSpec.EXACTLY);
final int childHeightMeasureSpec =
MeasureSpec.makeMeasureSpec(pHeight, MeasureSpec.EXACTLY);
View child;
for (int i = ; i < getChildCount(); i++) {
child = getChildAt(i);
// skip measure if gone
if (child.getVisibility() == GONE) {
continue;
}
measureChild(child, childWidthMeasureSpec, childHeightMeasureSpec);
}
setMeasuredDimension(pWidth, pHeight);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int left = l;
final int right = r;
int top;
int bottom;
final int offset = (int) mSlideOffset;
View child;
for (int i = ; i < getChildCount(); i++) {
child = getChildAt(i);
// skip layout
if (child.getVisibility() == GONE) {
continue;
}
if (child == mBehindView) {
top = b + offset;
bottom = top + b - t;
} else {
top = t + offset;
bottom = b + offset;
}
child.layout(left, top, right, bottom);
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
ensureTarget();
if (null == mTarget) {
return false;
}
if (!isEnabled()) {
return false;
}
final int aciton = MotionEventCompat.getActionMasked(ev);
boolean shouldIntercept = false;
switch (aciton) {
case MotionEvent.ACTION_DOWN: {
mInitMotionX = ev.getX();
mInitMotionY = ev.getY();
shouldIntercept = false;
break;
}
case MotionEvent.ACTION_MOVE: {
final float x = ev.getX();
final float y = ev.getY();
final float xDiff = x - mInitMotionX;
final float yDiff = y - mInitMotionY;
if (canChildScrollVertically((int) yDiff)) {
shouldIntercept = false;
} else {
final float xDiffabs = Math.abs(xDiff);
final float yDiffabs = Math.abs(yDiff);
// intercept rules:
// 1. The vertical displacement is larger than the horizontal displacement;
// 2. Panel stauts is CLOSE:slide up
// 3. Panel status is OPEN:slide down
if (yDiffabs > mTouchSlop && yDiffabs >= xDiffabs
&& !(mStatus == Status.CLOSE && yDiff >
|| mStatus == Status.OPEN && yDiff < )) {
shouldIntercept = true;
}
}
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
shouldIntercept = false;
break;
}
}
return shouldIntercept;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
ensureTarget();
if (null == mTarget) {
return false;
}
if (!isEnabled()) {
return false;
}
boolean wantTouch = true;
final int action = MotionEventCompat.getActionMasked(ev);
switch (action) {
case MotionEvent.ACTION_DOWN: {
// if target is a view, we want the DOWN action.
if (mTarget instanceof View) {
wantTouch = true;
}
break;
}
case MotionEvent.ACTION_MOVE: {
final float y = ev.getY();
final float yDiff = y - mInitMotionY;
if (canChildScrollVertically(((int) yDiff))) {
wantTouch = false;
} else {
processTouchEvent(yDiff);
wantTouch = true;
}
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL: {
finishTouchEvent();
wantTouch = false;
break;
}
}
return wantTouch;
}
/**
* @param offset Displacement in vertically.
*/
private void processTouchEvent(final float offset) {
if (Math.abs(offset) < mTouchSlop) {
return;
}
final float oldOffset = mSlideOffset;
// pull up to open
if (mStatus == Status.CLOSE) {
// reset if pull down
if (offset >= ) {
mSlideOffset = ;
} else {
mSlideOffset = offset;
}
if (mSlideOffset == oldOffset) {
return;
}
// pull down to close
} else if (mStatus == Status.OPEN) {
final float pHeight = -getMeasuredHeight();
// reset if pull up
if (offset <= ) {
mSlideOffset = pHeight;
} else {
final float newOffset = pHeight + offset;
mSlideOffset = newOffset;
}
if (mSlideOffset == oldOffset) {
return;
}
}
// relayout
requestLayout();
}
/**
* Called after gesture is ending.
*/
private void finishTouchEvent() {
final int pHeight = getMeasuredHeight();
final int percent = (int) (pHeight * mPercent);
final float offset = mSlideOffset;
boolean changed = false;
if (Status.CLOSE == mStatus) {
if (offset <= -percent) {
mSlideOffset = -pHeight;
mStatus = Status.OPEN;
changed = true;
} else {
// keep panel closed
mSlideOffset = ;
}
} else if (Status.OPEN == mStatus) {
if ((offset + pHeight) >= percent) {
mSlideOffset = ;
mStatus = Status.CLOSE;
changed = true;
} else {
// keep panel opened
mSlideOffset = -pHeight;
}
}
animatorSwitch(offset, mSlideOffset, changed);
}
private void animatorSwitch(final float start, final float end) {
animatorSwitch(start, end, true, mDuration);
}
private void animatorSwitch(final float start, final float end, final long duration) {
animatorSwitch(start, end, true, duration);
}
private void animatorSwitch(final float start, final float end, final boolean changed) {
animatorSwitch(start, end, changed, mDuration);
}
private void animatorSwitch(final float start,
final float end,
final boolean changed,
final long duration) {
ValueAnimator animator = ValueAnimator.ofFloat(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mSlideOffset = (float) animation.getAnimatedValue();
requestLayout();
}
});
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
if (changed) {
if (mStatus == Status.OPEN) {
checkAndFirstOpenPanel();
}
if (null != mOnSlideDetailsListener) {
mOnSlideDetailsListener.onStatucChanged(mStatus);
}
}
}
});
animator.setDuration(duration);
animator.start();
}
/**
* Whether the closed pannel is opened at first time.
* If open first, we should set the behind view's visibility as VISIBLE.
*/
private void checkAndFirstOpenPanel() {
if (isFirstShowBehindView) {
isFirstShowBehindView = false;
mBehindView.setVisibility(VISIBLE);
}
}
/**
* When pulling, target view changed by the panel status. If panel opened, the target is behind view.
* Front view is for otherwise.
*/
private void ensureTarget() {
if (mStatus == Status.CLOSE) {
mTarget = mFrontView;
} else {
mTarget = mBehindView;
}
}
/**
* Check child view can srcollable in vertical direction.
*
* @param direction Negative to check scrolling up, positive to check scrolling down.
*
* @return true if this view can be scrolled in the specified direction, false otherwise.
*/
protected boolean canChildScrollVertically(int direction) {
if (mTarget instanceof AbsListView) {
return canListViewSroll((AbsListView) mTarget);
} else if (mTarget instanceof FrameLayout ||
mTarget instanceof RelativeLayout ||
mTarget instanceof LinearLayout) {
View child;
for (int i = ; i < ((ViewGroup) mTarget).getChildCount(); i++) {
child = ((ViewGroup) mTarget).getChildAt(i);
if (child instanceof AbsListView) {
return canListViewSroll((AbsListView) child);
}
}
}
if (android.os.Build.VERSION.SDK_INT < ) {
return ViewCompat.canScrollVertically(mTarget, -direction) || mTarget.getScrollY() > ;
} else {
return ViewCompat.canScrollVertically(mTarget, -direction);
}
}
protected boolean canListViewSroll(AbsListView absListView) {
if (mStatus == Status.OPEN) {
return absListView.getChildCount() >
&& (absListView.getFirstVisiblePosition() > || absListView.getChildAt()
.getTop() <
absListView.getPaddingTop());
} else {
final int count = absListView.getChildCount();
return count >
&& (absListView.getLastVisiblePosition() < count -
|| absListView.getChildAt(count - )
.getBottom() > absListView.getMeasuredHeight());
}
}
@Override
protected Parcelable onSaveInstanceState() {
SavedState ss = new SavedState(super.onSaveInstanceState());
ss.offset = mSlideOffset;
ss.status = mStatus.ordinal();
return ss;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
mSlideOffset = ss.offset;
mStatus = Status.valueOf(ss.status);
if (mStatus == Status.OPEN) {
mBehindView.setVisibility(VISIBLE);
}
requestLayout();
}
static class SavedState extends BaseSavedState {
private float offset;
private int status;
/**
* Constructor used when reading from a parcel. Reads the state of the superclass.
*
* @param source
*/
public SavedState(Parcel source) {
super(source);
offset = source.readFloat();
status = source.readInt();
}
/**
* Constructor called by derived classes when creating their SavedState objects
*
* @param superState The state of the superclass of this view
*/
public SavedState(Parcelable superState) {
super(superState);
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeFloat(offset);
out.writeInt(status);
}
public static final Creator<SavedState> CREATOR =
new Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
}
這個商品詳情頁的架構也是本人在已上線的項目中使用
歡迎star、fork, 謝謝
- github位址