android view实现横向滑动选择

概述本文实例为大家分享了androidview实现横向滑动选择的具体代码，供大家参考，具体内容如下

本文实例为大家分享了androID vIEw实现横向滑动选择的具体代码，供大家参考，具体内容如下

做文字编辑，从网上找来的。

HorizontalScrollSelectVIEw：

  public boolean mAlwaysOverrIDetouch = true;  protected listadapter mAdapter;  private int mleftVIEwIndex = -1;  private int mRightVIEwIndex = 0;  protected int mCurrentX;  protected int mNextX;  private int mMaxX = Integer.MAX_VALUE;  private int mdisplayOffset = 0;  protected Scroller mScroller;  private GestureDetector mGesture;  private Queue<VIEw> mRemovedVIEwQueue = new linkedList<VIEw>();  private OnItemSelectedListener mOnItemSelected;  private OnItemClickListener mOnItemClicked;  private OnItemLongClickListener mOnItemLongClicked;  private OnScrollListener mScrollListener;  /**   * 选中item时图片   */  private Drawable mDrawable;  private boolean mDataChanged = false;  private Context context;  private boolean scrollerFalg1 = false;  private boolean scrollerFalg2 = false;  private int position = 0x7f020000;    public HorizontalScrollSelectVIEw(Context context,AttributeSet attrs) {    super(context,attrs);    this.context = context;    initVIEw();  }   private synchronized voID initVIEw() {    mleftVIEwIndex = -1;    mRightVIEwIndex = 0;    mdisplayOffset = 0;    mCurrentX = 0;    mNextX = 0;    mMaxX = Integer.MAX_VALUE;    mScroller = new Scroller(getContext());    mGesture = new GestureDetector(getContext(),mOnGesture);  }   public voID setMScrollListener(OnScrollListener Listener) {    mScrollListener = Listener;  }   @OverrIDe  public voID setonItemSelectedListener(OnItemSelectedListener Listener) {    mOnItemSelected = Listener;  }   @OverrIDe  public voID setonItemClickListener(OnItemClickListener Listener) {    mOnItemClicked = Listener;  }   @OverrIDe  public voID setonItemLongClickListener(OnItemLongClickListener Listener) {    mOnItemLongClicked = Listener;  }   /**   * 设置选中状态时的图片   *   * @param mDrawable   */  public voID setSelectBitmap(Drawable mDrawable) {    this.mDrawable = mDrawable;  }   private DataSetobserver mDataObserver = new DataSetobserver() {     @OverrIDe    public voID onChanged() {      synchronized (HorizontalScrollSelectVIEw.this) {        mDataChanged = true;      }      invalIDate();      requestLayout();    }     @OverrIDe    public voID onInvalIDated() {      reset();      invalIDate();      requestLayout();    }   };   @OverrIDe  public listadapter getAdapter() {    return mAdapter;  }   @OverrIDe  public VIEw getSelectedVIEw() {    //Todo: implement    return null;  }   @OverrIDe  public voID setAdapter(listadapter adapter) {    if (mAdapter != null) {      mAdapter.unregisterDataSetobserver(mDataObserver);    }    mAdapter = adapter;    mAdapter.registerDataSetobserver(mDataObserver);    reset();  }   private synchronized voID reset() {    initVIEw();    removeAllVIEwsInLayout();    requestLayout();  }   @OverrIDe  public voID setSelection(int position) {    //Todo: implement    int positionX = position * this.getWIDth();    int maxWIDth = this.getChildCount() * this.getWIDth();    if (positionX <= 0) {      positionX = 0;    }    if (positionX > maxWIDth) {      positionX = maxWIDth;    }    scrollTo(positionX);  }   private voID addAndMeasureChild(final VIEw child,int vIEwPos) {    LayoutParams params = child.getLayoutParams();    if (params == null) {      params = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);    }     addVIEwInLayout(child,vIEwPos,params,true);    child.measure(MeasureSpec.makeMeasureSpec(getWIDth(),MeasureSpec.AT_MOST),MeasureSpec.makeMeasureSpec(getHeight(),MeasureSpec.AT_MOST));  }    @Suppresslint("NewAPI")  @OverrIDe  protected synchronized voID onLayout(boolean changed,int left,int top,int right,int bottom) {    super.onLayout(changed,left,top,right,bottom);     if (mAdapter == null) {      return;    }     if (mDataChanged) {      int oldCurrentX = mCurrentX;      initVIEw();      removeAllVIEwsInLayout();      mNextX = oldCurrentX;      mDataChanged = false;    }     if (mScroller.computeScrollOffset()) {      int scrollx = mScroller.getCurrX();      mNextX = scrollx;    } // if(mNextX <= 0){//  mNextX = 0;//  mScroller.forceFinished(true);// }// if(mNextX >= mMaxX) {//  mNextX = mMaxX;//  mScroller.forceFinished(true);// }     int dx = mCurrentX - mNextX;     removeNonVisibleItems(dx);    fillList(dx);    positionItems(dx);// Log.e("onlayout","mleftVIEwIndex"+(mleftVIEwIndex+1));    mCurrentX = mNextX;     if (!mScroller.isFinished()) {      post(new Runnable() {        @OverrIDe        public voID run() {          requestLayout();        }      });     } else {      if (scrollerFalg1 || (!scrollerFalg1 && scrollerFalg2)) {        VIEw chID = getChildAt(0);        if (chID != null) {          mdisplayOffset = 0;          positionItems(0);          if (mDrawable != null) {            getChildAt(2).setBackground(mDrawable);          }          if (mScrollListener != null) {            int position = (int) getChildAt(2).getTag(this.position);            mScrollListener.onScrollSelectItem(this,position);          }        }       }    }    }   /**   * 获取屏幕宽度   *   * @param context   * @return   */  public static int getSecreenWIDth(Context context) {    displayMetrics dm = new displayMetrics();    dm = context.getResources().getdisplayMetrics();    int screenWIDth = dm.wIDthPixels;    return screenWIDth / 5;  }   private voID fillList(final int dx) {    int edge = 0;    VIEw child = getChildAt(0);    if (child != null) {      edge = child.getleft();    }    fillListleft(edge,dx);     edge = 0;    child = getChildAt(getChildCount() - 1);    if (child != null) {      edge = child.getRight();    }    fillListRight(edge,dx);   }   private voID fillListRight(int rightEdge,final int dx) {    //&& mRightVIEwIndex < mAdapter.getCount()    while (rightEdge + dx < getWIDth()) {      if (mRightVIEwIndex >= mAdapter.getCount()) {        mRightVIEwIndex = 0;      }      VIEw child = mAdapter.getVIEw(mRightVIEwIndex,mRemovedVIEwQueue.poll(),this);      child.setTag(position,mRightVIEwIndex);      addAndMeasureChild(child,-1);      rightEdge += child.getMeasureDWIDth(); //  if(mRightVIEwIndex == mAdapter.getCount()-1) {//  mMaxX = mCurrentX + rightEdge - getWIDth();//  }//  //  if (mMaxX < 0) {//  mMaxX = 0;//  }      mRightVIEwIndex++;    }   }   private voID fillListleft(int leftEdge,final int dx) {    //&& mleftVIEwIndex >= 0    while (leftEdge + dx > 0) {      if (mleftVIEwIndex <= -1) {        mleftVIEwIndex = mAdapter.getCount() - 1;      }      VIEw child = mAdapter.getVIEw(mleftVIEwIndex,mleftVIEwIndex);      addAndMeasureChild(child,0);      leftEdge -= child.getMeasureDWIDth();      mleftVIEwIndex--;      mdisplayOffset -= child.getMeasureDWIDth();    }  }   private voID removeNonVisibleItems(final int dx) {    VIEw child = getChildAt(0);    while (child != null && child.getRight() + dx <= 0) {      mdisplayOffset += child.getMeasureDWIDth();      mRemovedVIEwQueue.offer(child);      removeVIEwInLayout(child);      mleftVIEwIndex++;      if (mleftVIEwIndex >= mAdapter.getCount()) {        mleftVIEwIndex = 0;      }      child = getChildAt(0);     }     child = getChildAt(getChildCount() - 1);    while (child != null && child.getleft() + dx >= getWIDth()) {      mRemovedVIEwQueue.offer(child);      removeVIEwInLayout(child);      mRightVIEwIndex--;      if (mRightVIEwIndex <= -1) {        mRightVIEwIndex = mAdapter.getCount() - 1;      }      child = getChildAt(getChildCount() - 1);    }  }    private voID positionItems(final int dx) {    if (getChildCount() > 0) {      mdisplayOffset += dx;      int left = mdisplayOffset;      for (int i = 0; i < getChildCount(); i++) {        VIEw child = getChildAt(i);        getChildAt(2).setBackground(null);        int chilDWIDth = child.getMeasureDWIDth();        child.layout(left,left + chilDWIDth,child.getMeasuredHeight());        left += chilDWIDth + child.getpaddingRight();      }    }  }   public synchronized voID scrollTo(int x) {    mScroller.startScroll(mNextX,x - mNextX,0);    requestLayout();  }   @OverrIDe  public boolean dispatchtouchEvent(MotionEvent ev) {    boolean handled = super.dispatchtouchEvent(ev);    handled |= mGesture.ontouchEvent(ev);     switch (ev.getAction()) {      case MotionEvent.ACTION_UP:        scrollerFalg2 = true;        requestLayout();        break;      default:        break;    }    return handled;  }   protected boolean onFling(MotionEvent e1,MotionEvent e2,float veLocityX,float veLocityY) {    synchronized (HorizontalScrollSelectVIEw.this) {      //mNextX      mScroller.fling(mNextX,(int) -veLocityX,Integer.MIN_VALUE,mMaxX,0);    }    requestLayout();    scrollerFalg1 = true;    return true;  }   protected boolean onDown(MotionEvent e) {    mScroller.forceFinished(true);    return true;  }   public interface OnScrollListener {    /**     * 互动过程中选中的item     *     * @param position     */    public voID onScrollSelectItem(VIEwGroup vIEwGroup,int position);   }    private OnGestureListener mOnGesture = new GestureDetector.SimpleOnGestureListener() {     @OverrIDe    public boolean onDown(MotionEvent e) {      return HorizontalScrollSelectVIEw.this.onDown(e);    }     @OverrIDe    public boolean onFling(MotionEvent e1,float veLocityY) {      return HorizontalScrollSelectVIEw.this.onFling(e1,e2,veLocityX,veLocityY);    }     @OverrIDe    public boolean onScroll(MotionEvent e1,float distanceX,float distanceY) {       synchronized (HorizontalScrollSelectVIEw.this) {        mNextX += (int) distanceX;      }      requestLayout();      scrollerFalg1 = false;      scrollerFalg2 = false;      return true;    }      @OverrIDe    public voID onShowPress(MotionEvent e) {      super.onShowPress(e);    }     @OverrIDe    public boolean onSingleTapUp(MotionEvent e) {      Log.e("onSingleTapUp","mleftVIEwIndex" + (mleftVIEwIndex + 1));//  scrollerFalg=true;      return super.onSingleTapUp(e);    }     @OverrIDe    public boolean onSingleTapConfirmed(MotionEvent e) {      for (int i = 0; i < getChildCount(); i++) {        VIEw child = getChildAt(i);        if (isEventWithinVIEw(e,child)) {          if (mOnItemClicked != null) {            mOnItemClicked.onItemClick(HorizontalScrollSelectVIEw.this,child,mleftVIEwIndex + 1 + i,mAdapter.getItemID(mleftVIEwIndex + 1 + i));          }          if (mOnItemSelected != null) {            mOnItemSelected.onItemSelected(HorizontalScrollSelectVIEw.this,mAdapter.getItemID(mleftVIEwIndex + 1 + i));          }          break;        }       }      return true;    }     @OverrIDe    public voID onLongPress(MotionEvent e) {      int childCount = getChildCount();      for (int i = 0; i < childCount; i++) {        VIEw child = getChildAt(i);        if (isEventWithinVIEw(e,child)) {          if (mOnItemLongClicked != null) {            mOnItemLongClicked.onItemLongClick(HorizontalScrollSelectVIEw.this,mAdapter.getItemID(mleftVIEwIndex + 1 + i));          }          break;        }       }    }     private boolean isEventWithinVIEw(MotionEvent e,VIEw child) {      Rect vIEwRect = new Rect();      int[] childposition = new int[2];      child.getLocationOnScreen(childposition);      int left = childposition[0];      int right = left + child.getWIDth();      int top = childposition[1];      int bottom = top + child.getHeight();      vIEwRect.set(left,bottom);      return vIEwRect.contains((int) e.getRawX(),(int) e.getRawY());    }  };

demo截图：

源码下载：android view实现横向滑动选择

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