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Android自定義控件仿QQ抽屜效果

 更新時(shí)間：2017年03月24日 09:29:37   作者：Horrarndoo  
這篇文章主要為大家詳細(xì)介紹了Android自定義控件仿QQ抽屜效果的相關(guān)資料，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

其實(shí)網(wǎng)上類(lèi)似的實(shí)現(xiàn)已經(jīng)很多了，原理也并不難，只是網(wǎng)上各種demo運(yùn)行下來(lái)，多少都有一些問(wèn)題。折騰了半天，決定自己實(shí)現(xiàn)一個(gè)。

首先我們看看實(shí)現(xiàn)效果：

對(duì)比網(wǎng)上各類(lèi)demo，這次要實(shí)現(xiàn)的主要表現(xiàn)在以下幾點(diǎn)：

1.側(cè)滑顯示抽屜view
2.側(cè)滑抽屜隱藏view控件點(diǎn)擊事件
3.單擊任意item隱藏顯示的抽屜view
4.滑動(dòng)list隱藏顯示的抽屜view
5.增加SwipeLayout點(diǎn)擊事件和Swipe touch事件判斷處理
6.優(yōu)化快速劃開(kāi)多個(gè)抽屜隱藏view時(shí)多個(gè)SwipeLayout滑動(dòng)狀態(tài)判斷處理，僅顯示最后一個(gè)滑動(dòng)的抽屜隱藏view，隱藏前面所有打開(kāi)的抽屜view（快速滑動(dòng)時(shí)，可能存在多個(gè)抽屜view打開(kāi)情況，網(wǎng)上找的幾個(gè)demo主要問(wèn)題都集中在這一塊）

實(shí)現(xiàn)原理

其實(shí)單就一個(gè)SwipeLayout的實(shí)現(xiàn)原理來(lái)講的話，還是很簡(jiǎn)單的，實(shí)際上單個(gè)SwipeLayout隱藏抽屜狀態(tài)時(shí)，應(yīng)該是這樣的：

也就是說(shuō)，最初的隱藏狀態(tài)，實(shí)際上是將hide view區(qū)域layout到conten view的右邊，達(dá)到隱藏效果，而后顯示則是根據(jù)拖拽的x值變化來(lái)動(dòng)態(tài)的layout 2個(gè)view，從而達(dá)到一個(gè)滑動(dòng)抽屜效果。
當(dāng)然，直接重寫(xiě)view的onTouchEvent來(lái)動(dòng)態(tài)的layout 2個(gè)view是可以實(shí)現(xiàn)我們需要的效果的，但是有更好的方法來(lái)實(shí)現(xiàn)，就是同過(guò)ViewDragHelper。
ViewDragHelper是google官方提供的一個(gè)專(zhuān)門(mén)用于手勢(shì)分析處理的類(lèi)，關(guān)于ViewDragHelper的基本使用，網(wǎng)上有一大堆的資源。具體的ViewDragHelper介紹以及基本使用方法，本文就不重復(fù)造輪子了，此處推薦鴻洋大神的一篇微博：Android ViewDragHelper完全解析 自定義ViewGroup神器。

具體實(shí)現(xiàn)

下面我們開(kāi)始具體的實(shí)現(xiàn)。
布局比較簡(jiǎn)單，這里就不貼代碼了，最后會(huì)貼上本demo的完整代碼地址。

首先我們實(shí)現(xiàn)一個(gè)繼承FrameLayout的自定義SwipeLauout，重寫(xiě)onFinishInflate方法：
這里我們只允許SwipeLayout設(shè)置2個(gè)子View，ContentLayout是繼承LinearLayout的自定義layout，后面會(huì)講到這個(gè)，此處先略過(guò)；

 @Override
 protected void onFinishInflate() {
  super.onFinishInflate();
  if (getChildCount() != 2) {
   throw new IllegalStateException("Must 2 views in SwipeLayout");
  }
  contentView = getChildAt(0);
  hideView = getChildAt(1);
  if (contentView instanceof ContentLayout)
   ((ContentLayout) contentView).setSwipeLayout(this);
  else {
   throw new IllegalStateException("content view must be an instanceof FrontLayout");
  }
 }

接著重寫(xiě)onSizeChanged，onLayout，onInterceptTouchEvent方法：

 @Override
 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  super.onSizeChanged(w, h, oldw, oldh);
  hideViewHeight = hideView.getMeasuredHeight();
  hideViewWidth = hideView.getMeasuredWidth();
  contentWidth = contentView.getMeasuredWidth();
 }

 @Override
 protected void onLayout(boolean changed, int left, int top, int right,
       int bottom) {
  // super.onLayout(changed, left, top, right, bottom);
  contentView.layout(0, 0, contentWidth, hideViewHeight);
  hideView.layout(contentView.getRight(), 0, contentView.getRight()
    + hideViewWidth, hideViewHeight);
 }

 @Override
 public boolean onInterceptTouchEvent(MotionEvent ev) {
  boolean result = viewDragHelper.shouldInterceptTouchEvent(ev);
  //  Log.e("SwipeLayout", "-----onInterceptTouchEvent-----");
  return result;
 }

然后是比較關(guān)鍵的，重寫(xiě)onTouchEvent方法以及ViewDragHelper.Callback回調(diào)，我們定了一個(gè)enum來(lái)判斷SwipeLayout的三種狀態(tài)。在onViewPositionChanged中，有2種方法實(shí)現(xiàn)content view和hide view的伴隨移動(dòng)，一種是直接offset view的橫向變化量，還有一種就是直接通過(guò)layout的方式，兩種方式都可以。

 public enum SwipeState {
  Open, Swiping, Close;
 }
 @Override
 public boolean onTouchEvent(MotionEvent event) {
  //  Log.e("SwipeLayout", "-----onTouchEvent-----");
  switch (event.getAction()) {
   case MotionEvent.ACTION_DOWN:
    downX = event.getX();
    downY = event.getY();
    break;
   case MotionEvent.ACTION_MOVE:
    // 1.獲取x和y方向移動(dòng)的距離
    float moveX = event.getX();
    float moveY = event.getY();
    float delatX = moveX - downX;// x方向移動(dòng)的距離
    float delatY = moveY - downY;// y方向移動(dòng)的距離

    if (Math.abs(delatX) > Math.abs(delatY)) {
     // 表示移動(dòng)是偏向于水平方向，那么應(yīng)該SwipeLayout應(yīng)該處理，請(qǐng)求listview不要攔截
     this.requestDisallowInterceptTouchEvent(true);
    }

    // 更新downX，downY
    downX = moveX;
    downY = moveY;
    break;
   case MotionEvent.ACTION_UP:

    break;
  }
  viewDragHelper.processTouchEvent(event);
  return true;
 }

 private ViewDragHelper.Callback callback = new ViewDragHelper.Callback() {
  @Override
  public boolean tryCaptureView(View child, int pointerId) {
   return child == contentView || child == hideView;
  }

  @Override
  public int getViewHorizontalDragRange(View child) {
   return hideViewWidth;
  }

  @Override
  public int clampViewPositionHorizontal(View child, int left, int dx) {
   if (child == contentView) {
    if (left > 0)
     left = 0;
    if (left < -hideViewWidth)
     left = -hideViewWidth;
   } else if (child == hideView) {
    if (left > contentWidth)
     left = contentWidth;
    if (left < (contentWidth - hideViewWidth))
     left = contentWidth - hideViewWidth;
   }
   return left;
  }

  @Override
  public void onViewPositionChanged(View changedView, int left, int top,
           int dx, int dy) {
   super.onViewPositionChanged(changedView, left, top, dx, dy);
   if (changedView == contentView) {
    // 如果手指滑動(dòng)deleteView，那么也要講橫向變化量dx設(shè)置給contentView
    hideView.offsetLeftAndRight(dx);
   } else if (changedView == hideView) {
    // 如果手指滑動(dòng)contentView，那么也要講橫向變化量dx設(shè)置給deleteView
    contentView.offsetLeftAndRight(dx);
   }

   //   if (changedView == contentView) {
   //    // 手動(dòng)移動(dòng)deleteView
   //    hideView.layout(hideView.getLeft() + dx,
   //      hideView.getTop() + dy, hideView.getRight() + dx,
   //      hideView.getBottom() + dy);
   //   } else if (hideView == changedView) {
   //    // 手動(dòng)移動(dòng)contentView
   //    contentView.layout(contentView.getLeft() + dx,
   //      contentView.getTop() + dy, contentView.getRight() + dx,
   //      contentView.getBottom() + dy);
   //   }
   //實(shí)時(shí)更新當(dāng)前狀態(tài)
   updateSwipeStates();
   invalidate();
  }

  @Override
  public void onViewReleased(View releasedChild, float xvel, float yvel) {
   super.onViewReleased(releasedChild, xvel, yvel);
   //根據(jù)用戶(hù)滑動(dòng)速度處理開(kāi)關(guān)
   //xvel: x方向滑動(dòng)速度
   //yvel: y方向滑動(dòng)速度
   //   Log.e("tag", "currentState = " + currentState);
   //   Log.e("tag", "xvel = " + xvel);
   if (xvel < -200 && currentState != SwipeState.Open) {
    open();
    return;
   } else if (xvel > 200 && currentState != SwipeState.Close) {
    close();
    return;
   }

   if (contentView.getLeft() < -hideViewWidth / 2) {
    // 打開(kāi)
    open();
   } else {
    // 關(guān)閉
    close();
   }
  }
 };

open()，close()實(shí)現(xiàn)

 public void open() {
  open(true);
 }

 public void close() {
  close(true);
 }

 /**
  * 打開(kāi)的方法
  *
  * @param isSmooth 是否通過(guò)緩沖動(dòng)畫(huà)的形式設(shè)定view的位置
  */
 public void open(boolean isSmooth) {
  if (isSmooth) {
   viewDragHelper.smoothSlideViewTo(contentView, -hideViewWidth,
     contentView.getTop());
   ViewCompat.postInvalidateOnAnimation(SwipeLayout.this);
  } else {
   contentView.offsetLeftAndRight(-hideViewWidth);//直接偏移View的位置
   hideView.offsetLeftAndRight(-hideViewWidth);//直接偏移View的位置
   //   contentView.layout(-hideViewWidth, 0, contentWidth - hideViewWidth, hideViewHeight);//直接通過(guò)坐標(biāo)擺放
   //   hideView.layout(contentView.getRight(), 0, hideViewWidth, hideViewHeight);//直接通過(guò)坐標(biāo)擺放
   invalidate();
  }
 }

 /**
  * 關(guān)閉的方法
  *
  * @param isSmooth true：通過(guò)緩沖動(dòng)畫(huà)的形式設(shè)定view的位置
  *     false：直接設(shè)定view的位置
  */
 public void close(boolean isSmooth) {
  if (isSmooth) {
   viewDragHelper.smoothSlideViewTo(contentView, 0, contentView.getTop());
   ViewCompat.postInvalidateOnAnimation(SwipeLayout.this);
  } else {
   contentView.offsetLeftAndRight(hideViewWidth);
   hideView.offsetLeftAndRight(hideViewWidth);
   invalidate();
   //contentView.layout(0, 0, contentWidth, hideViewHeight);//直接通過(guò)坐標(biāo)擺放
   //hideView.layout(contentView.getRight(), 0, hideViewWidth, hideViewHeight);//直接通過(guò)坐標(biāo)擺放
  }
 }

此上基本實(shí)現(xiàn)了單個(gè)SwipeLayout的抽屜滑動(dòng)效果，但是將此SwipeLayout作為一個(gè)item布局設(shè)置給一個(gè)listView的時(shí)候，還需要做許多的判斷。

由于listView的重用機(jī)制，我們這里并未針對(duì)listview做任何處理，所以一旦有一個(gè)item的SwipeLayout的狀態(tài)是打開(kāi)狀態(tài)，不可避免的其它也必然有幾個(gè)是打開(kāi)狀態(tài)，所以我們這里需要根據(jù)檢測(cè)listView的滑動(dòng)，當(dāng)listView滑動(dòng)時(shí)，關(guān)閉SwipeLayout。既然需要在外部控制SwipeLayout的開(kāi)關(guān)，我們先定義一個(gè)SwipeLayoutManager用于管理SwipeLayout的控制。

public class SwipeLayoutManager {
 //記錄打開(kāi)的SwipeLayout集合
 private HashSet<SwipeLayout> mUnClosedSwipeLayouts = new HashSet<SwipeLayout>();

 private SwipeLayoutManager() {
 }

 private static SwipeLayoutManager mInstance = new SwipeLayoutManager();

 public static SwipeLayoutManager getInstance() {
  return mInstance;
 }

 /**
  * 將一個(gè)沒(méi)有關(guān)閉的SwipeLayout加入集合
  * @param layout
  */
 public void add(SwipeLayout layout) {
  mUnClosedSwipeLayouts.add(layout);
 }

 /**
  * 將一個(gè)沒(méi)有關(guān)閉的SwipeLayout移出集合
  * @param layout
  */
 public void remove(SwipeLayout layout){
  mUnClosedSwipeLayouts.remove(layout);
 }

 /**
  * 關(guān)閉已經(jīng)打開(kāi)的SwipeLayout
  */
 public void closeUnCloseSwipeLayout() {
  if(mUnClosedSwipeLayouts.size() == 0){
   return;
  }

  for(SwipeLayout l : mUnClosedSwipeLayouts){
   l.close(true);
  }
  mUnClosedSwipeLayouts.clear();
 }

 /**
  * 關(guān)閉已經(jīng)打開(kāi)的SwipeLayout
  */
 public void closeUnCloseSwipeLayout(boolean isSmooth) {
  if(mUnClosedSwipeLayouts.size() == 0){
   return;
  }

  for(SwipeLayout l : mUnClosedSwipeLayouts){
   l.close(isSmooth);
  }
  mUnClosedSwipeLayouts.clear();
 }
}

這樣就可以監(jiān)聽(tīng)listView的滑動(dòng)，然后在listView滑動(dòng)的時(shí)候，關(guān)閉所有的抽屜View。

 listView.setOnScrollListener(new OnScrollListener() {
   @Override
   public void onScrollStateChanged(AbsListView view, int scrollState) {
    swipeLayoutManager.closeUnCloseSwipeLayout();
   }

   @Override
   public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
   }
  });

考慮到大多數(shù)時(shí)候，在我們打開(kāi)抽屜View和關(guān)閉抽屜View的時(shí)候，外部需要知道SwipeLayout的狀態(tài)值，所以我們需要在SwipeLayout中增加幾個(gè)接口，告訴外部當(dāng)前SwipeLayout的狀態(tài)值：

SwipeLayout.java

----------------
 private void updateSwipeStates() {
  SwipeState lastSwipeState = currentState;
  SwipeState swipeState = getCurrentState();

  if (listener == null) {
   try {
    throw new Exception("please setOnSwipeStateChangeListener first!");
   } catch (Exception e) {
    e.printStackTrace();
   }
   return;
  }

  if (swipeState != currentState) {
   currentState = swipeState;
   if (currentState == SwipeState.Open) {
    listener.onOpen(this);
    // 當(dāng)前的Swipelayout已經(jīng)打開(kāi)，需要讓Manager記錄
    swipeLayoutManager.add(this);
   } else if (currentState == SwipeState.Close) {
    listener.onClose(this);
    // 說(shuō)明當(dāng)前的SwipeLayout已經(jīng)關(guān)閉，需要讓Manager移除
    swipeLayoutManager.remove(this);
   } else if (currentState == SwipeState.Swiping) {
    if (lastSwipeState == SwipeState.Open) {
     listener.onStartClose(this);
    } else if (lastSwipeState == SwipeState.Close) {
     listener.onStartOpen(this);
     //hideView準(zhǔn)備顯示之前，先將之前打開(kāi)的的SwipeLayout全部關(guān)閉
     swipeLayoutManager.closeUnCloseSwipeLayout();
     swipeLayoutManager.add(this);
    }
   }
  } else {
   currentState = swipeState;
  }
 }

 /**
  * 獲取當(dāng)前控件狀態(tài)
  *
  * @return
  */
 public SwipeState getCurrentState() {
  int left = contentView.getLeft();
  //  Log.e("tag", "contentView.getLeft() = " + left);
  //  Log.e("tag", "hideViewWidth = " + hideViewWidth);
  if (left == 0) {
   return SwipeState.Close;
  }

  if (left == -hideViewWidth) {
   return SwipeState.Open;
  }
  return SwipeState.Swiping;
 }
 private OnSwipeStateChangeListener listener;

 public void setOnSwipeStateChangeListener(
   OnSwipeStateChangeListener listener) {
  this.listener = listener;
 }

 public View getContentView() {
  return contentView;
 }

 public interface OnSwipeStateChangeListener {
  void onOpen(SwipeLayout swipeLayout);

  void onClose(SwipeLayout swipeLayout);

  void onStartOpen(SwipeLayout swipeLayout);

  void onStartClose(SwipeLayout swipeLayout);
 }

然后接下來(lái)是寫(xiě)一個(gè)為listView設(shè)置的SwipeAdapter

SwipeAdapter.java

------------
public class SwipeAdapter extends BaseAdapter implements OnSwipeStateChangeListener {
 private Context mContext;
 private List<String> list;
 private MyClickListener myClickListener;
 private SwipeLayoutManager swipeLayoutManager;

 public SwipeAdapter(Context mContext) {
  super();
  this.mContext = mContext;
  init();
 }

 private void init() {
  myClickListener = new MyClickListener();
  swipeLayoutManager = SwipeLayoutManager.getInstance();
 }

 public void setList(List<String> list){
  this.list = list;
  notifyDataSetChanged();
 }

 @Override
 public int getCount() {
  return list.size();
 }

 @Override
 public Object getItem(int position) {
  return list.get(position);
 }

 @Override
 public long getItemId(int position) {
  return position;
 }

 @Override
 public View getView(final int position, View convertView, ViewGroup parent) {
  if (convertView == null) {
   convertView = UIUtils.inflate(R.layout.list_item_swipe);
  }
  ViewHolder holder = ViewHolder.getHolder(convertView);

  holder.tv_content.setText(list.get(position));
  holder.tv_overhead.setOnClickListener(myClickListener);
  holder.tv_overhead.setTag(position);
  holder.tv_delete.setOnClickListener(myClickListener);
  holder.tv_delete.setTag(position);
  holder.sv_layout.setOnSwipeStateChangeListener(this);
  holder.sv_layout.setTag(position);

  holder.sv_layout.getContentView().setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    ToastUtils.showToast("item click : " + position);
    swipeLayoutManager.closeUnCloseSwipeLayout();
   }
  });

  return convertView;
 }

 static class ViewHolder {
  TextView tv_content, tv_overhead, tv_delete;
  SwipeLayout sv_layout;

  public ViewHolder(View convertView) {
   tv_content = (TextView) convertView.findViewById(R.id.tv_content);
   tv_overhead = (TextView) convertView.findViewById(R.id.tv_overhead);
   tv_delete = (TextView) convertView.findViewById(R.id.tv_delete);
   sv_layout = (SwipeLayout) convertView.findViewById(R.id.sv_layout);
  }

  public static ViewHolder getHolder(View convertView) {
   ViewHolder holder = (ViewHolder) convertView.getTag();
   if (holder == null) {
    holder = new ViewHolder(convertView);
    convertView.setTag(holder);
   }
   return holder;
  }
 }

 class MyClickListener implements View.OnClickListener {
  @Override
  public void onClick(View v) {
   Integer position = (Integer) v.getTag();
   switch (v.getId()) {
    case R.id.tv_overhead:
     //ToastUtils.showToast("position : " + position + " overhead is clicked.");
     }
     break;
    case R.id.tv_delete:
     //ToastUtils.showToast("position : " + position + " delete is clicked.");
     }
     break;
    default:
     break;
   }
  }
 }

 @Override
 public void onOpen(SwipeLayout swipeLayout) {
  //ToastUtils.showToast(swipeLayout.getTag() + "onOpen.");
 }

 @Override
 public void onClose(SwipeLayout swipeLayout) {
  //ToastUtils.showToast(swipeLayout.getTag() + "onClose.");
 }

 @Override
 public void onStartOpen(SwipeLayout swipeLayout) {
  //   ToastUtils.showToast("onStartOpen.");
 }

 @Override
 public void onStartClose(SwipeLayout swipeLayout) {
  //   ToastUtils.showToast("onStartClose.");
 }
}

此時(shí)已經(jīng)基本實(shí)現(xiàn)了我們需要的大部分功能了，但是當(dāng)我們滑動(dòng)的時(shí)候，又發(fā)現(xiàn)新的問(wèn)題，我們的SwipeLayout和listview滑動(dòng)判斷有問(wèn)題。由于前面我們僅僅是將touch攔截事件簡(jiǎn)簡(jiǎn)單單的丟給了viewDragHelper.shouldInterceptTouchEvent(ev)來(lái)處理，導(dǎo)致SwipeLayout和listview攔截touch事件時(shí)的處理存在一定的問(wèn)題，這里我們要提到一個(gè)知識(shí)點(diǎn)：Android view事件的傳遞。
（1）首先由Activity分發(fā)，分發(fā)給根View，也就是DecorView（DecorView為整個(gè)Window界面的最頂層View）
（2）然后由根View分發(fā)到子的View

view事件攔截如下圖所示：

view事件的消費(fèi)如下圖所示：

注：以上2張圖借鑒網(wǎng)上總結(jié)的比較經(jīng)典的圖

所以這里我們就要談到一開(kāi)始出現(xiàn)的ContentLayout，主要重寫(xiě)了onInterceptTouchEvent和onTouchEvent。

public class ContentLayout extends LinearLayout {
 SwipeLayoutInterface mISwipeLayout;

 public ContentLayout(Context context) {
  super(context);
 }

 public ContentLayout(Context context, AttributeSet attrs) {
  super(context, attrs);
 }

 public ContentLayout(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
 }

 public void setSwipeLayout(SwipeLayoutInterface iSwipeLayout) {
  this.mISwipeLayout = iSwipeLayout;
 }

 @Override
 public boolean onInterceptTouchEvent(MotionEvent ev) {
//  Log.e("ContentLayout", "-----onInterceptTouchEvent-----");
  if (mISwipeLayout.getCurrentState() == SwipeState.Close) {
   return super.onInterceptTouchEvent(ev);
  } else {
   return true;
  }
 }

 @Override
 public boolean onTouchEvent(MotionEvent ev) {
//  Log.e("ContentLayout", "-----onTouchEvent-----");
  if (mISwipeLayout.getCurrentState() == SwipeState.Close) {
   return super.onTouchEvent(ev);
  } else {
   if (ev.getActionMasked() == MotionEvent.ACTION_UP) {
    mISwipeLayout.close();
   }
   return true;
  }
 }
}

另外由于在ContentLayout中需要拿到父View SwipeLayout的開(kāi)關(guān)狀態(tài)以及控制SwipeLayout的關(guān)閉，因此在再寫(xiě)一個(gè)接口，用于ContentLayout獲取SwipeLayout的開(kāi)關(guān)狀態(tài)以及更新SwipeLayout。

public interface SwipeLayoutInterface {

 SwipeState getCurrentState();

 void open();

 void close();
}

然后接著的是完善SwipeLayout的onInterceptTouchEvent，我們?cè)谶@里增加一個(gè)GestureDetectorCompat處理手勢(shì)識(shí)別：

 private void init(Context context) {
  viewDragHelper = ViewDragHelper.create(this, callback);
  mGestureDetector = new GestureDetectorCompat(context, mOnGestureListener);
  swipeLayoutManager = SwipeLayoutManager.getInstance();
 }

 private SimpleOnGestureListener mOnGestureListener = new SimpleOnGestureListener() {
  @Override
  public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
   // 當(dāng)橫向移動(dòng)距離大于等于縱向時(shí)，返回true
   return Math.abs(distanceX) >= Math.abs(distanceY);
  }
 };
  @Override
 public boolean onInterceptTouchEvent(MotionEvent ev) {
  boolean result = viewDragHelper.shouldInterceptTouchEvent(ev) & mGestureDetector.onTouchEvent(ev);
  //  Log.e("SwipeLayout", "-----onInterceptTouchEvent-----");
  return result;
 }

如此下來(lái)，整個(gè)View不管是上下拖動(dòng)，還是SwipeLayout的開(kāi)關(guān)滑動(dòng)，都已經(jīng)實(shí)現(xiàn)完成了。最后增加對(duì)應(yīng)overhead，delete以及item的點(diǎn)擊事件，此處完善SwipeAdapter的代碼之后如下。

 class MyClickListener implements View.OnClickListener {
  @Override
  public void onClick(View v) {
   Integer position = (Integer) v.getTag();
   switch (v.getId()) {
    case R.id.tv_overhead:
     //ToastUtils.showToast("position : " + position + " overhead is clicked.");
     swipeLayoutManager.closeUnCloseSwipeLayout(false);
     if(onSwipeControlListener != null){
      onSwipeControlListener.onOverhead(position, list.get(position));
     }
     break;
    case R.id.tv_delete:
     //ToastUtils.showToast("position : " + position + " delete is clicked.");
     swipeLayoutManager.closeUnCloseSwipeLayout(false);
     if(onSwipeControlListener != null){
      onSwipeControlListener.onDelete(position, list.get(position));
     }
     break;
    default:
     break;
   }
  }
 }

 private OnSwipeControlListener onSwipeControlListener;

 public void setOnSwipeControlListener(OnSwipeControlListener onSwipeControlListener){
  this.onSwipeControlListener = onSwipeControlListener;
 }

 /**
  * overhead 和 delete點(diǎn)擊事件接口
  */
 public interface OnSwipeControlListener{
  void onOverhead(int position, String itemTitle);

  void onDelete(int position, String itemTitle);
 }

最后貼上MainActivity代碼，此處通過(guò)OnSwipeControlListener接口回調(diào)實(shí)現(xiàn)item的刪除和置頂：

public class MainActivity extends Activity implements OnSwipeControlListener {
 private ListView listView;
 private List<String> list = new ArrayList<String>();
 private SwipeLayoutManager swipeLayoutManager;
 private SwipeAdapter swipeAdapter;

 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  initData();
  initView();
 }

 private void initData() {
  for (int i = 0; i < 50; i++) {
   list.add("content - " + i);
  }
 }

 private void initView() {
  swipeLayoutManager = SwipeLayoutManager.getInstance();
  swipeAdapter = new SwipeAdapter(this);
  swipeAdapter.setList(list);

  listView = (ListView) findViewById(R.id.list_view);

  listView.setAdapter(swipeAdapter);
  listView.setOnScrollListener(new OnScrollListener() {
   @Override
   public void onScrollStateChanged(AbsListView view, int scrollState) {
    swipeLayoutManager.closeUnCloseSwipeLayout();
   }

   @Override
   public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
   }
  });

  swipeAdapter.setOnSwipeControlListener(this);
 }

 @Override
 public void onOverhead(int position, String itemTitle) {
  setItemOverhead(position, itemTitle);
 }

 @Override
 public void onDelete(int position, String itemTitle) {
  removeItem(position, itemTitle);
 }

 /**
  * 設(shè)置item置頂
  *
  * @param position
  * @param itemTitle
  */
 private void setItemOverhead(int position, String itemTitle) {
  // ToastUtils.showToast("position : " + position + " overhead.");
  ToastUtils.showToast("overhead ---" + itemTitle + "--- success.");
  String newTitle = itemTitle;
  list.remove(position);//刪除要置頂?shù)膇tem
  list.add(0, newTitle);//根據(jù)adapter傳來(lái)的Title數(shù)據(jù)在list 0位置插入title字符串，達(dá)到置頂效果
  swipeAdapter.setList(list);//重新給Adapter設(shè)置list數(shù)據(jù)并更新
  UIUtils.runOnUIThread(new Runnable() {
   @Override
   public void run() {
    listView.setSelection(0);//listview選中第0項(xiàng)item
   }
  });
 }

 /**
  * 刪除item
  *
  * @param position
  * @param itemTitle
  */

 private void removeItem(int position, String itemTitle) {
  //  ToastUtils.showToast("position : " + position + " delete.");
  ToastUtils.showToast("delete ---" + itemTitle + "--- success.");
  list.remove(position);
  swipeAdapter.setList(list);//重新給Adapter設(shè)置list數(shù)據(jù)并更新
 }
}

至此整個(gè)demo基本完成，本次完成的功能基本能夠直接放到項(xiàng)目中使用。其實(shí)最麻煩的地方就在于view的touch事件攔截和處理，不過(guò)將本demo的log打開(kāi)看一下對(duì)比之后，也就能夠理解整個(gè)傳遞過(guò)程了。

完整demo地址：https://github.com/Horrarndoo/SwipeLayout

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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