Android Custom ViewGroup to achieve a scrollable landscape layout (2) _android

Last article Custom ViewGroup (1) Address: http://www.jb51.net/article/100608.htm

Here the Direct code:

Package com.example.libingyuan.horizontallistview.ScrollViewGroup;
Import Android.content.Context;
Import Android.util.AttributeSet;
Import android.view.MotionEvent;
Import Android.view.View;
Import Android.view.ViewGroup;

Import Android.widget.Scroller; /** * Custom ViewGroup * On the basis of horizontal layout, increased scrolling effect, but no boundary restrictions/public class Scrollviewgroup extends ViewGroup {private scroller
  Mscroller;

  private float Mlastmotionx = 0;
  Public Scrollviewgroup {This (context, NULL);
  Public Scrollviewgroup (context, AttributeSet attrs) {This (context, attrs, 0); Scrollviewgroup (context, AttributeSet attrs, int defstyleattr) {Super (context, Attrs, Defstyleatt
    R);
  Init (context);
  private void init (context context) {Mscroller = new scroller (context); @Override public void Computescroll () {if (Mscroller.computescrolloffset ()) {Scrollto (Mscroller.getcurr
      X (), Mscroller.getcurry ());
 Postinvalidate ();   @Override public boolean ontouchevent (Motionevent event) {//TODO auto-generated method stub int A
    ction = Event.getaction ();
    float x = Event.getx (); Switch (action) {Case MotionEvent.ACTION_DOWN:if (!mscroller.isfinished ()) {Mscroller.abortanim
        Ation ();
        } Mlastmotionx = Event.getx ();
      Break
        Case MotionEvent.ACTION_MOVE:float delt = mlastmotionx-x;
        Mlastmotionx = x;
        Scrollby ((int) delt, 0);
      Break
        Case MotionEvent.ACTION_UP:invalidate ();

      Break
    Default:break;
  return true; @Override protected void onmeasure (int widthmeasurespec, int heightmeasurespec) {//Reset width High this.setmeasured
  Dimension (Measurewidth (Widthmeasurespec, Heightmeasurespec), Measureheight (Widthmeasurespec, Heightmeasurespec));
  /** * Measuring width */private int measurewidth (int widthmeasurespec, int heightmeasurespec) {//width  int sizewidth = measurespec.getsize (Widthmeasurespec);
    int modewidth = Measurespec.getmode (Widthmeasurespec);
    The width of the parent control (wrap_content) int width = 0;

    int childcount = Getchildcount ();
      Re-measure the width of the child View and the maximum height for (int i = 0; i < ChildCount i++) {View children = getchildat (i);
      Measurechild (Child, Widthmeasurespec, Heightmeasurespec);
      Marginlayoutparams LP = (marginlayoutparams) child.getlayoutparams ();
      int childwidth = child.getmeasuredwidth () + Lp.leftmargin + lp.rightmargin;
    width + + childwidth; return modewidth = = measurespec.exactly?
  Sizewidth:width; /** * Measuring Height * * private int measureheight (int widthmeasurespec, int heightmeasurespec) {//height int Sizeh
    eight = Measurespec.getsize (HEIGHTMEASURESPEC);
    int modeheight = Measurespec.getmode (Heightmeasurespec);
    The height (wrap_content) int height = 0 of the parent control;

    int childcount = Getchildcount (); Re-measure the width of the child view and the maximum height 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 = Height/childcount; return modeheight = = measurespec.exactly?
  Sizeheight:height;
    @Override protected void OnLayout (Boolean changed, int l, int t, int r, int b) {int childleft = 0;
    int childwidth;
    int height = getheight ();
    int childcount = Getchildcount ();
      for (int i = 0; i < ChildCount. i++) {View child = Getchildat (i);
      Marginlayoutparams LP = (marginlayoutparams) child.getlayoutparams ();
      Childwidth = child.getmeasuredwidth () + Lp.leftmargin + lp.rightmargin;
      Child.layout (childleft, 0, Childleft + childwidth, height);
    Childleft + = Childwidth; }} @Override public Layoutparams GeneratelayoUtparams (AttributeSet attrs) {return new Marginlayoutparams (GetContext (), attrs);
 }
}

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