Android开发实现自定义水平滚动的容器示例

概述本文实例讲述了Android开发实现自定义水平滚动的容器。分享给大家供大家参考，具体如下：

本文实例讲述了AndroID开发实现自定义水平滚动的容器。分享给大家供大家参考，具体如下：

public class horizontalscrollview extends VIEwGroup {  //手势  private GestureDetector mGestureDetector;  private HorizontalScroller mScroller;  private int curID;  //快速滑动  private boolean isFlying;  //--回调函数-------------------------------------  private Onchangelistener mListener;  public voID setonchangelistener(Onchangelistener Listener) {    if (Listener != null) {      mListener = Listener;    }  }  public interface Onchangelistener{    voID move2dest(int curID);  }  public horizontalscrollview(Context context) {    this(context,null);  }  public horizontalscrollview(Context context,AttributeSet attrs) {    this(context,attrs,0);  }  public horizontalscrollview(Context context,AttributeSet attrs,int defStyle) {    super(context,defStyle);    mScroller = new HorizontalScroller();    isFlying = false;    initGesture(context);  }  @OverrIDe  protected voID onLayout(boolean changed,int l,int t,int r,int b) {    // 模向移动，    for (int i = 0; i < getChildCount(); i++) {      VIEw vIEw = getChildAt(i);      //给水平方向的每个vIEw定位      vIEw.layout(i * getWIDth(),getWIDth() + i * getWIDth(),getHeight());    }  }  @OverrIDe  protected voID onMeasure(int wIDthMeasureSpec,int heightmeasureSpec) {    for (int i = 0; i < getChildCount(); i++) {      VIEw vIEw = getChildAt(i);      vIEw.measure(wIDthMeasureSpec,heightmeasureSpec);    }    super.onMeasure(wIDthMeasureSpec,heightmeasureSpec);  }  @OverrIDe  public boolean ontouchEvent(MotionEvent event) {    mGestureDetector.ontouchEvent(event);    switch (event.getAction()) {    case MotionEvent.ACTION_DOWN:      if (!isFlying) {        move2dest();      }      isFlying = false;      break;    case MotionEvent.ACTION_MOVE:      break;    case MotionEvent.ACTION_UP:      break;    default:      break;    }    return true;  }  public voID move2dest() {    //    int destID = (getScrollX() + getWIDth() / 2) / getWIDth();    move2dest(destID);  }  public voID move2dest(int destID) {    curID = destID;    if (destID > getChildCount() - 1) {      destID = getChildCount() - 1;    }    if (mListener != null) {      mListener.move2dest(curID);    }    int distance = (int) (destID * getWIDth() - getScrollX());    // scrollBy(distance,0);    mScroller.startScroll(getScrollX(),getScrollY(),distance,0);    invalIDate();  }  /**   * invalIDate()此方法会触发下面的方法   */  @OverrIDe  public voID computeScroll() {    // 如果存在偏移，就不断刷新    if (mScroller.computeScrollOffset()) {      scrollTo(mScroller.getCurrX(),0);      invalIDate();    }    super.computeScroll();  }  private voID initGesture(Context context) {    mGestureDetector = new GestureDetector(context,new OnGestureListener() {      @OverrIDe      public boolean onSingleTapUp(MotionEvent e) {        return false;      }      @OverrIDe      public voID onShowPress(MotionEvent e) {      }      @OverrIDe      public boolean onScroll(MotionEvent e1,MotionEvent e2,float distanceX,float distanceY) {        scrollBy((int) distanceX,0);        return false;      }      @OverrIDe      public voID onLongPress(MotionEvent e) {      }      @OverrIDe      /**       * 快速滑动时       */      public boolean onFling(MotionEvent e1,float veLocityX,float veLocityY) {        isFlying = true;        if (curID > 0 && veLocityX > 0) {// 表示向左移          move2dest(curID - 1);        } else if (curID < getChildCount() && veLocityX < 0) {          move2dest(curID + 1);// 向右        } else {          move2dest();// 移到原位        }        return false;      }      @OverrIDe      public boolean onDown(MotionEvent e) {        return false;      }    });  }}

/** * 位移计算工具类 * * @author chenlin * */public class HorizontalScroller {  private int startX;  private int startY;  private int distanceX;  private int distanceY;  private int currentX;  private int currentY;  private long startTime;  private long duration = 1000L;  private boolean isFinish;  /**   *   * @param scrollX   *      x坐标   * @param scrollY   *      y坐标   * @param distanceX   *      X方向移动的距离   * @param distanceY   *      y方向移动的距离   */  public voID startScroll(int scrollX,int scrollY,int distanceX,int distanceY) {    startX = scrollX;    startY = scrollY;    this.distanceX = distanceX;    this.distanceY = distanceY;    isFinish = false;    startTime = SystemClock.uptimeMillis();  }  /**   * 计算偏移量，   *   * @return true 还在移动 false：移动已经停止   */  public boolean computeScrollOffset() {    if (isFinish) {      return false;    }    long timePassed = SystemClock.uptimeMillis() - startTime;    if (timePassed < duration) {      currentX = (int) (startX + distanceX * timePassed / duration);      currentY = (int) (startY + distanceY * timePassed / duration);      System.out.println("currentX:::" + currentX);    } else if (timePassed >= duration) {      currentX = startX + distanceX;      currentY = startY + distanceY;      isFinish = true;    }    return true;  }  public int getCurrX() {    return currentX;  }  public voID setCurrentX(int currentX) {    this.currentX = currentX;  }  public int getCurrentY() {    return currentY;  }  public voID setCurrentY(int currentY) {    this.currentY = currentY;  }}

使用方法

public class ScrollActivity extends Activity implements OnCheckedchangelistener,Onchangelistener {  private int[] IDs = { R.drawable.a1,R.drawable.a2,R.drawable.a3,R.drawable.a4,R.drawable.a5,R.drawable.a6 };  private horizontalscrollview mVIEw;  private linearLayout mLayout;  private RadioGroup mGroup;  @OverrIDe  protected voID onCreate(Bundle savedInstanceState) {    requestwindowFeature(Window.FEATURE_NO_Title);    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_myscrollvIEw);    init();  }  private voID init() {    mLayout = (linearLayout) findVIEwByID(R.ID.body_layout);    mGroup = (RadioGroup) findVIEwByID(R.ID.radiogroup);    mVIEw = new horizontalscrollview(this);    for (int i = 0; i < IDs.length; i++) {      ImageVIEw imageVIEw = new ImageVIEw(this);      imageVIEw.setBackgroundResource(IDs[i]);      mVIEw.addVIEw(imageVIEw);    }    mLayout.addVIEw(mVIEw);    // 随便添加一个vIEw    VIEw vIEw = getLayoutInflater().inflate(R.layout.activity_progressvIEw,null);    mVIEw.addVIEw(vIEw,3);    for (int i = 0; i < mVIEw.getChildCount(); i++) {      Radiobutton radiobutton = new Radiobutton(this);      // 设置ID的编号      radiobutton.setID(i);      mGroup.setorIEntation(linearLayout.HORIZONTAL);      mGroup.addVIEw(radiobutton);      if (i == 0) {        radiobutton.setChecked(true);      }    }    mGroup.setonCheckedchangelistener(this);    mVIEw.setonchangelistener(this);  }  @OverrIDe  public voID onCheckedChanged(RadioGroup group,int checkedID) {    mVIEw.move2dest(checkedID);  }  @OverrIDe  public voID move2dest(int curID) {    Radiobutton radiobutton = (Radiobutton) mGroup.getChildAt(curID);    radiobutton.setChecked(true);  }}

布局文件

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  androID:layout_wIDth="fill_parent"  androID:layout_height="fill_parent"  androID:orIEntation="vertical" >  <RadioGroup    androID:ID="@+ID/radiogroup"    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content" >  </RadioGroup>  <linearLayout    androID:ID="@+ID/body_layout"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical" >  </linearLayout></linearLayout>

更多关于AndroID相关内容感兴趣的读者可查看本站专题：《Android基本组件用法总结》、《Android开发入门与进阶教程》、《Android布局layout技巧总结》、《Android视图View技巧总结》、《Android编程之activity *** 作技巧总结》、《Android资源 *** 作技巧汇总》及《Android控件用法总结》

希望本文所述对大家AndroID程序设计有所帮助。

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