Android Custom ViewGroup using adapter adapter data (6) _android

On the basis of custom ViewGroup (5): http://www.jb51.net/article/100639.htm, add the use of adapter to fit the data, which is more convenient, just use the adapter adapter data and cannot be updated.

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;
  /** * Custom ViewGroup (horizontal scrolling)/public class Scrollviewgroup extends ViewGroup {//rolling compute auxiliary class private scroller Mscroller;
  Screen width private int screenwidth;
  The maximum distance that can be moved is private int mmaxdistance;
  Custom gesture Listening class private Scrolltouchlisener mtouchlisener;

  Gesture monitoring private gesturedetector mdetector;

  Private Baseadapter Madapter;
  /** * When creating objects using the New keyword, call the/public Scrollviewgroup (context) {This (context, NULL);
 /** * Call/Public scrollviewgroup when used in XML file (context, AttributeSet attrs) {   This is (context, attrs, 0); /** * is invoked in an XML file, and the custom attribute is used when calling/public Scrollviewgroup (context, AttributeSet attrs, int defstyleat
    TR) {Super (context, attrs, defstyleattr);
  Init (context);  /** * Initialization Method * Initializes the scrolling helper class scroller and calculates the screen width/private void init (context context) {///initialization of the auxiliary class Mscroller
    = new Scroller (context);
    Get screen width WindowManager manager = (windowmanager) context. Getsystemservice (Context.window_service);
    Displaymetrics outmetrics = new Displaymetrics ();
    Manager.getdefaultdisplay (). Getmetrics (Outmetrics);
    ScreenWidth = Outmetrics.widthpixels;
    Gesture Indicator Initialization Mtouchlisener = new Scrolltouchlisener ();
  Mdetector = new Gesturedetector (context, mtouchlisener); /** * The method that needs to be overridden when rolling * is used to control scrolling/@Override public void Computescroll () {//To stop if scrolling (mscroller.compute
      Scrolloffset ()) {//scroll to the specified position Scrollto (Mscroller.getcurrx (), Mscroller.getcurry ()); This sentence must be written, or it cannot be refreshed in real time
      Invalidate (); /** * Finger touchscreen event Monitor/@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 ();
    /* * Measuring method, measuring the width and height of the parent layout * * * @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); //Reset Width High this.setmeasureddimension (Measurewidth (Widthmeasurespec, Heightmeasurespec), Measureheight (widthMeasure
  Spec, Heightmeasurespec)); /** * Measuring width */private int measurewidth (int widthmeasurespec, int heightmeasurespec) {//width int Sizew
    Idth = 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);
      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; /** * Measuring Height * * private int measureheight (int widthmeasurespec, int heightmeasurespec) {//height int size
    Height = 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 = child.getmeasuredheight ();
    Height = Height/childcount; return modeheight = = measurespec.exactly?
  Sizeheight:height; /** * Give sub layout set position * * @Override protected void OnLayout (Boolean changed, int l, int t, int r, int b) {int Childleft = 0;//to the left of the space int childwidth;//view width int height = getheight ()//Screen width int childcount = Getchil
     DCount ();//number of view (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; }/** * Lets child view's child view and child view size */private void Childlayout (View child) {if (child==null) {throw NE
    W illegalstateexception ("Scrollviewgroup must has one child"); } if (child instanceof ViewGroup) {if ((ViewGroup) child). Getchildcount () >0) throw new Illegalstateexc
      Eption ("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 (getc
  Ontext (), attrs); /* * Press Event Action_down/public boolean ondown (Motionevent e) {//Get last child view view LastChild = Getchil
    DAt (Getchildcount ()-1); Gets the maximum sliding distance of the slide (the coordinates of the last child's right border minus the screen width) int finalychild = (int) (LASTCHILD.GETX () + lastchild.getwidth ()-Screenwidth);
    Mmaxdistance = Finalychild;
    If you stop scrolling, the animation is canceled (that is, the finger presses to stop scrolling) if (!mscroller.isfinished ()) {mscroller.abortanimation ();
  return false; * * * Lift Event ACTION_UP/public boolean onup (Motionevent e) {//If the sliding distance is less than the leftmost (0) of the first control, bounce back to (0,0) point if (GETSCR
    OLLX () <= 0) {scrollto (0, 0);
    //If the sliding distance is greater than the maximum sliding distance, slide to the last child view if (GETSCROLLX () >= mmaxdistance) {scrollto (mmaxdistance, 0);
    //Refresh interface invalidate ();
  return false; }/* *action_down, Short Press no move/public void onshowpress (Motionevent e) {}/* Short press Action_down, ACTION_UP *
  /public boolean onsingletapup (Motionevent e) {return false; }/* *action_down, slow sliding/public boolean onscroll (Motionevent E1, motionevent E2, float Distancex, float Distan
    CEY) {//rolling scrollby (int) Distancex, 0);
  return false;
  }//Action_down, long press not sliding public void onlongpress (Motionevent e) {}/* *action_down, fast sliding, action_up/public boolean onfling (Motionevent E1, motionevent E2, float Velocityx, float velocityy) {mscroller.fling (
    ), 0, (int)-velocityx, 0, 0, mmaxdistance, 0, 0);
  return false; 
    /** * Custom Gesture Listener Class * * Private class Scrolltouchlisener implements Gesturedetector.ongesturelistener {//press Event
    @Override public boolean Ondown (Motionevent e) {return ScrollViewGroup.this.onDown (e);
    //Click event @Override public void onshowpress (Motionevent e) {ScrollViewGroup.this.onShowPress (e); //Finger Lift Event @Override public boolean onsingletapup (Motionevent e) {return ScrollViewGroup.this.onSingle
    Tapup (e); }//Scrolling event @Override public boolean onscroll (Motionevent E1, motionevent E2, float Distancex, float distancey)
    {return ScrollViewGroup.this.onScroll (E1, E2, Distancex, Distancey);
    }//Long by Event @Override public void onlongpress (Motionevent e) {ScrollViewGroup.this.onLongPress (e);}//Sliding event @Override public boolean onfling (Motionevent E1, motionevent E2, float Velocityx, float velocityy) {
    Return ScrollViewGroup.this.onFling (E1, E2, Velocityx, Velocityy);

 }
  }

}

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