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文件大小: 199kb
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上传时间: 2015-03-06
详细说明： public class MySideBar extends View{ OnTouchingLetterChangedListener onTouchingLetterChangedListener; 按住改变背景色 private boolean showBkg; public static String[] b { "热" "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O&q uot; "P" "Q" "R" "S" "T" "U" "V" "W" "X" "Y" "Z" }; 被选中位置 int choose 1; private Paint paint new Paint ; public MySideBar Context context { super context ; } public MySideBar Context context AttributeSet attrs int defStyle { super context attrs defStyle ; } public MySideBar Context context AttributeSet attrs { super context attrs ; } protected void onDraw Canvas canvas { super onDraw canvas ; if showBkg { canvas drawColor Color parseColor "#ccddFF" ; } float height getHeight ; float width getWidth ; 计算单个字母高度 float singleHeight height float b length ; for int i 0; i < b length; i++ { paint setColor Color BLACK ; if i choose { 选中的颜色 paint setColor Color parseColor "#3399ff" ; 加粗 paint setFakeBoldText true ; } 设置文本坐标 float xPos width 2 paint measureText b[i] 2; float yPos singleHeight i + singleHeight; canvas drawText b[i] xPos yPos paint ; paint reset ; } } public boolean dispatchTouchEvent MotionEvent event { int action event getAction ; float y event getY ; final int oldChoose choose; final int c int y getHeight b length ; final OnTouchingLetterChangedListener listener onTouchingLetterChangedListener; switch action { case MotionEvent ACTION DOWN: showBkg true; if oldChoose c && listener null { if c > 0 && c < b length { listener onTouchingLetterChanged c ; choose c; invalidate ; } } break; case MotionEvent ACTION MOVE: if oldChoose c && listener null { if c > 0 && c < b length { listener onTouchingLetterChanged c ; choose c; invalidate ; } } break; case MotionEvent ACTION UP: showBkg false; choose 1; invalidate ; break; } return true; } public void setOnTouchingLetterChangedListener OnTouchingLetterChangedListener onTouchingLetterChangedListener { this onTouchingLetterChangedListener onTouchingLetterChangedListener; } public interface OnTouchingLetterChangedListener { public void onTouchingLetterChanged int s ; }">public class MySideBar extends View{ OnTouchingLetterChangedListener onTouchingLetterChangedListener; 按住改变背景色 private boolean showBkg; public static String[] b { "热" "A" "B" "C" "D" "E" "F" "G&q [更多] ...展开收缩
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