在自定义viewgroup（5）：http://www.jb51.net/article/100639.htm的基础上，添加使用adapter来适配数据，这样更加的方便，这里只是使用adapter适配数据，不能更新。
package com.example.libingyuan.horizontallistview.ScrollViewGroup; import android.content.Context; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.Scroller; /** * 自定义ViewGroup（横向滚动） */ public class ScrollViewGroup extends ViewGroup { //滚动计算辅助类 private Scroller mScroller; //屏幕宽度 private int screenWidth; //可以移动的最大距离 private int mMaxDistance; //自定义手势监听类 private ScrollTouchLisener mTouchLisener; //手势监听 private GestureDetector mDetector; private BaseAdapter mAdapter; /** * 使用new关键字创建对象的时候调用 */ public ScrollViewGroup(Context context) { this(context, null); } /** * 在XML文件中使用的时候调用 */ public ScrollViewGroup(Context context, AttributeSet attrs) { this(context, attrs, 0); } /** * 在xml文件中调用，并且使用了自定义属性的时候调用 */ public ScrollViewGroup(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context); } /** * 初始化方法 * 初始化滚动辅助类Scroller以及计算出屏幕宽度 */ private void init(Context context) { //初始化辅助类 mScroller = new Scroller(context); //获取屏幕宽度 WindowManager manager = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); manager.getDefaultDisplay().getMetrics(outMetrics); screenWidth = outMetrics.widthPixels; //手势指示器初始化 mTouchLisener = new ScrollTouchLisener(); mDetector = new GestureDetector(context, mTouchLisener); } /** * 滚动时需要重写的方法，用于控制滚动 */ @Override public void computeScroll() { //判断滚动时候停止 if (mScroller.computeScrollOffset()) { //滚动到指定的位置 scrollTo(mScroller.getCurrX(), mScroller.getCurrY()); //这句话必须写，否则不能实时刷新 invalidate(); } } /** * 手指触屏事件监听 */ @Override public boolean onTouchEvent(MotionEvent event) { mDetector.onTouchEvent(event); if (event.getAction() == MotionEvent.ACTION_UP) { this.onUp(event); } return true; } public void setAdapter(BaseAdapter adapter) { this.mAdapter = adapter; requestLayout(); } /* *测量方法，测量父布局的宽度和高度 */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { removeAllViews(); for (int i = 0; i < mAdapter.getCount(); i++) { View child = mAdapter.getView(i, null, null); addView(child); } //重新设置宽高 this.setMeasuredDimension(measureWidth(widthMeasureSpec, heightMeasureSpec), measureHeight(widthMeasureSpec, heightMeasureSpec)); } /** * 测量宽度 */ private int measureWidth(int widthMeasureSpec, int heightMeasureSpec) { // 宽度 int sizeWidth = MeasureSpec.getSize(widthMeasureSpec); int modeWidth = MeasureSpec.getMode(widthMeasureSpec); //父控件的宽（wrap_content） int width = 0; int childCount = getChildCount(); //重新测量子view的宽度，以及最大高度 for (int i = 0; i < childCount; i++) { View child = getChildAt(i); measureChild(child, widthMeasureSpec, heightMeasureSpec); // LayoutParams lp = child.getLayoutParams(); /* MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin; width += childWidth;*/ width += child.getMeasuredWidth(); } return modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width; } /** * 测量高度 */ private int measureHeight(int widthMeasureSpec, int heightMeasureSpec) { //高度 int sizeHeight = MeasureSpec.getSize(heightMeasureSpec); int modeHeight = MeasureSpec.getMode(heightMeasureSpec); //父控件的高（wrap_content） int height = 0; int childCount = getChildCount(); //重新测量子view的宽度，以及最大高度 for (int i = 0; i < childCount; i++) { View child = getChildAt(i); measureChild(child, widthMeasureSpec, heightMeasureSpec); /* MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin; height += childHeight;*/ height += child.getMeasuredHeight(); } height = height / childCount; return modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height; } /** * 给子布局设定位置 */ @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int childLeft = 0;//子View左边的间距 int childWidth;//子View的宽度 int height = getHeight();//屏幕的宽度 int childCount = getChildCount();//子View的数量 for (int i = 0; i < childCount; i++) { View child = getChildAt(i); /* MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;*/ childWidth = child.getMeasuredWidth(); child.layout(childLeft, 0, childLeft + childWidth, height); childLayout(child); childLeft += childWidth; } } /** *让子View的子View和子View大小一样 */ private void childLayout(View child){ if (child==null){ throw new IllegalStateException("ScrollViewGroup must has one child"); } if (child instanceof ViewGroup){ if(((ViewGroup)child).getChildCount()>0) throw new IllegalStateException("view can host only one direct child"); ((ViewGroup) child).getChildAt(0).layout(0,0,child.getWidth(),child.getHeight()); } } @Override public LayoutParams generateLayoutParams(AttributeSet attrs) { return new MarginLayoutParams(getContext(), attrs); } /* *按下事件 ACTION_DOWN */ public boolean onDown(MotionEvent e) { //得到最后一个子View View lastChild = getChildAt(getChildCount() - 1); //获取滑动的最大滑动距离（最后一个Child的右边框的坐标减去屏幕的宽度） int finalyChild = (int) (lastChild.getX() + lastChild.getWidth() - screenWidth); mMaxDistance = finalyChild; //如果停止滚动则取消动画（即手指按下就停止滚动） if (!mScroller.isFinished()) { mScroller.abortAnimation(); } return false; } /* *抬起事件 ACTION_UP */ public boolean onUp(MotionEvent e) { //如果滑动的距离小于第一个控件的最左边（0）则回弹至（0,0）点 if (getScrollX() <= 0) { scrollTo(0, 0); } //如果滑动的距离大于最大可滑动距离则滑动到最后一个子View if (getScrollX() >= mMaxDistance) { scrollTo(mMaxDistance, 0); } //刷新界面 invalidate(); return false; } /* *ACTION_DOWN 、短按不移动 */ public void onShowPress(MotionEvent e) { } /* *短按ACTION_DOWN、ACTION_UP */ public boolean onSingleTapUp(MotionEvent e) { return false; } /* *ACTION_DOWN 、慢滑动 */ public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { //滚动 scrollBy((int) distanceX, 0); return false; } // ACTION_DOWN 、长按不滑动 public void onLongPress(MotionEvent e) { } /* *ACTION_DOWN 、快滑动、 ACTION_UP */ public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { mScroller.fling(getScrollX(), 0, (int) -velocityX, 0, 0, mMaxDistance, 0, 0); return false; } /** * 自定义手势监听类 */ private class ScrollTouchLisener implements GestureDetector.OnGestureListener { //按下事件 @Override public boolean onDown(MotionEvent e) { return ScrollViewGroup.this.onDown(e); } //单击事件 @Override public void onShowPress(MotionEvent e) { ScrollViewGroup.this.onShowPress(e); } //手指抬起事件 @Override public boolean onSingleTapUp(MotionEvent e) { return ScrollViewGroup.this.onSingleTapUp(e); } //滚动事件 @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return ScrollViewGroup.this.onScroll(e1, e2, distanceX, distanceY); } //长按事件 @Override public void onLongPress(MotionEvent e) { ScrollViewGroup.this.onLongPress(e); } //滑动事件 @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return ScrollViewGroup.this.onFling(e1, e2, velocityX, velocityY); } } }
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。