我正在构建一个“日视图”日历应用程序。我已经使用列表视图创建了空日历，现在需要添加我的约会。
我的光标已全部设置，我可以检索我的约会，只需在列表视图上绘制它们。棘手的部分是每个列表行是 30 分钟，我的一些约会可能会更长，长达几个小时。所以需要能够指定约会应该在列表视图的哪个位置绘制，即使它目前不在屏幕上。
【问题讨论】：
我也有同样的看法。我开发了自己的 CustomView 并将其保存在 ScrollView 中。这个 customView 的高度是 24 * 60 dip。所以视图的高度会随着我们保持 dip 而不是 px 而增加（我希望你知道 px 和 dip 之间的区别）并且宽度将是设备屏幕的宽度。
我无法与您分享完整的代码。但是，可以在这里部分粘贴。这将为您带来处理每件事的清晰画面。
public class CustomDayView extends View implements OnTouchListener{
private Paint p;
private Paint textp;
private Paint roundRectP;
private int parentWidth = 0;
private int parentHeight = 0;
private int X_OFFSET = 5;
private int Y_OFFSET = 5;
private int HOUR_BLOCK_HEIGHT = 60;
private int font_max_width;
private ScrollView _scrollView;
private int least_time_in_hours = 24*60;//6 * 60
private RectF _rects[];
private int font_height;
private Context context;
public CustomDayEmployeeView(Context context) {
super(context);
this.context = context;
init();
}
public CustomDayEmployeeView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
init();
}
public CustomDayEmployeeView(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
this.context = context;
init();
}
private void init(){
//Creating Paint Objects
//setting color
//setting Fonts
this.setOnTouchListener(this);
calculateRectValues();
}
private void calculateRectValues() {
// Calculating the Rects to draw in the paint this includes x,y points starting of the rect and width and height of the rectangle.
int font_max_width = calculate the width needed to draw the hours from 0 to 24 hours;
for(int i=0;i<no of appts;i++)
_rects[j] = new RectF(font_max_width, convertTimetoSeconds("09:30"), screenwidth-font_max_width , convertTimetoSeconds("11:30");
}
private int convertTimetoSeconds(String _startTime) {
// TODO Auto-generated method stub
int total = Integer.parseInt(_startTime.substring(0,_startTime.indexOf(":"))) * 60;
total += Integer.parseInt(_startTime.substring(_startTime.indexOf(":")+1, _startTime.length()));
return total;
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
parentWidth = MeasureSpec.getSize(widthMeasureSpec);
parentHeight = MeasureSpec.getSize(heightMeasureSpec);
calculateRectValues();
setMeasuredDimension(screenwidth,24 * HOUR_BLOCK_HEIGHT);
}
public void draw(Canvas canvas) {
// TODO Auto-generated method stub
super.draw(canvas);
for(int i=0;i<25;i++)
{
String preString = "";
String poststring = "";
if(i == 12)
{
preString = "Noon";
poststring = "";
}
else if(i%12 == 0)
{
preString = "12";
poststring = " AM";
}
else if(i<12)
{
preString = i+"";
poststring = " AM";
}
else
{
preString = i%12+"";
poststring = " PM";
}
canvas.drawText(preString, X_OFFSET+3, i * HOUR_BLOCK_HEIGHT + font_height, p);
canvas.drawText(poststring, X_OFFSET+p.measureText(preString), i * HOUR_BLOCK_HEIGHT + font_height, p);
p.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.NORMAL));
p.setColor(Color.parseColor("#cbcaca"));
p.setStrokeWidth(0.2f);
p.setPathEffect(new DashPathEffect(new float[] {1,2}, 0));
canvas.drawLine(font_max_width, i * (HOUR_BLOCK_HEIGHT)+ font_height/2+HOUR_BLOCK_HEIGHT/2, parentWidth-8, i * (HOUR_BLOCK_HEIGHT)+ font_height/2+HOUR_BLOCK_HEIGHT/2, p);
p.setColor(Color.parseColor("#f1f1f1"));
p.setPathEffect(new PathEffect());
p.setStrokeWidth(0.2f);
canvas.drawLine(font_max_width, i * HOUR_BLOCK_HEIGHT+ font_height/2, parentWidth-8, i * HOUR_BLOCK_HEIGHT+ font_height/2, p);
}
for(int j=0;j<no of appts;j++)
{
canvas.drawRoundRect(_rects[j], 3, 3, roundRectP);
canvas.drawText(obj._title, _rects[j].left+X_OFFSET,_rects[j].top + font_height + Y_OFFSET, textp);
}
}
}
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
int x = (int) event.getX();
int y = (int) event.getY();
for(int j=0;j<no of appts;j++)
{
if(_rects[j].contains(x, y))
{
//Selected J appointmrnt
}
}
return true;
}
}
我认为这会对您有所帮助。只需创建 Object 并将约会传递给 ArrayList 以初始化该对象并对其进行所需的调整。
【讨论】：
如果不在屏幕上，则无需绘制任何内容。
我会以这种方式实现列表适配器：getItem(int position) 方法返回每个列表项表示的时间（实际上是时间间隔）。 getView(int position, View convertView, ViewGroup parent) 定义了哪些约会在给定位置对应项目的区间内，并根据此信息更新项目的视图。
您可能还需要an endless adapter。
【讨论】：