基于Android自定义控件实现刮刮乐效果

 只是简单的实现了效果，界面没怎么做优化，不过那都是次要的啦！！相信大家都迫不及待的想看效果图了吧，

其中主要的彩票视图类和橡皮擦类都是通过代码的方式构建视图，布局文件就一个主activity_main

上代码！！

主activity：

package com.guaguale;
import android.app.activity;
import android.os.bundle;
import android.view.menu;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.viewgroup.layoutparams;
import android.widget.button;
import android.widget.relativelayout;
/**
 * 主activity
 *
 * @author haozai
 *
 */
public class mainactivity extends activity {
relativelayout container;
button btn;
erinieshow erinieshow;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
container = (relativelayout) findviewbyid(r.id.container);
btn = (button) findviewbyid(r.id.enterbtn);
btn.setonclicklistener(new onclicklistener() {
@override
public void onclick(view v) {
// todo auto-generated method stub
showenrie();
}
});
}
private void showenrie() {
// todo auto-generated method stub
// 移除所有子元素
container.removeallviews();
// 产生一个彩票
int level = getlevel();
erinieshow = new erinieshow(this, level);
container.addview(erinieshow, new layoutparams(-2, -2));
}
/**
 * 获取奖励等级
 *
 * @return
 */
private int getlevel() {
// todo auto-generated method stub
double d = math.random() * 100;
if (d < 50) {
return 3;
}
if (d < 90) {
return 2;
}
return 1;
}
@override
public boolean oncreateoptionsmenu(menu menu) {
// inflate the menu; this adds items to the action bar if it is present.
getmenuinflater().inflate(r.menu.main, menu);
return true;
}
}

因为彩票视图相对复杂，所以通过自定义控件的方式，构造了一个彩票视图

package com.guaguale;
import android.content.context;
import android.graphics.color;
import android.view.gravity;
import android.view.view;
import android.widget.button;
import android.widget.relativelayout;
/**
 * 彩票视图类
 *
 * @author haozai
 *
 */
public class erinieshow extends relativelayout {
int level;
context mcontext;
relativelayout rubberbg;// 最底层奖励等级
rubbershow mrubbershow;// 橡皮擦
button mbutton;
int rubberbgid = 10001;
int mbuttonid = 10002;
public erinieshow(context context, int level) {
super(context);
// todo auto-generated constructor stub
this.mcontext = context;
this.level = level;
getelement();// 得到子元素
setelementlp();// 设置布局参数
// 初始化彩票了
setelementstyle();
// 设置橡皮檫了
setelement();
}
private void setelement() {
// 第一步在彩票上面画一个图层
mrubbershow.beginrubber(color.parsecolor("#d3d3d3"), 30, 10);
}
private void setelementstyle() {
switch (level) {
case 1:
rubberbg.setbackgroundresource(r.drawable.ic_launcher);
break;
case 2:
rubberbg.setbackgroundresource(r.drawable.ic_launcher);
break;
case 3:
rubberbg.setbackgroundresource(r.drawable.ic_launcher);
break;
default:
break;
}
}
/**
 * 给布局的子元素设置布局参数
 */
private void setelementlp() {
// todo auto-generated method stub
relativelayout.layoutparams rubber_bg_lp = new relativelayout.layoutparams(
350, 80);
rubberbg.setlayoutparams(rubber_bg_lp);
mrubbershow.setlayoutparams(rubber_bg_lp);
// rubber_bg_lp正下方
relativelayout.layoutparams rubber_btn_lp = new relativelayout.layoutparams(
-2, -2);
rubber_btn_lp.addrule(relativelayout.center_horizontal);
rubber_btn_lp.addrule(relativelayout.below, rubberbgid);
mbutton.setlayoutparams(rubber_btn_lp);
mbutton.setclickable(false);
}
/**
 * 获取布局的子元素
 */
private void getelement() {
// todo auto-generated method stub
rubberbg = new relativelayout(mcontext);// 得到彩票
mrubbershow = new rubbershow(mcontext, level);// 得到橡皮擦
mbutton = new button(mcontext);
rubberbg.setid(rubberbgid);
mbutton.setid(mbuttonid);
mbutton.setonclicklistener(new onclicklistener() {
@override
public void onclick(view v) {
// todo auto-generated method stub
}
});
rubberbg.addview(mrubbershow);
addview(rubberbg);
addview(mbutton);
}
}

橡皮檫类，用于将中奖信息上面的临时画布去掉

package com.guaguale;
import android.content.context;
import android.graphics.bitmap;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.bitmap.config;
import android.graphics.paint.style;
import android.graphics.path;
import android.graphics.porterduff;
import android.graphics.porterduffxfermode;
import android.util.log;
import android.view.motionevent;
import android.view.view;
import android.view.viewgroup.layoutparams;
/**
 * 橡皮擦类
 *
 * @author haozai
 *
 */
public class rubbershow extends view {
private float touch_to_erance;// 填充的最小距离，这个值越小画出来的曲线越柔和
private bitmap bitmap;
private canvas canvas;// 临时画布
private paint paint;// 画笔
private path mpath;// 鼠标的运行路径
private float mx, my;// 坐标
private boolean isdraw = false;
public rubbershow(context context, int level) {
super(context);
// todo auto-generated constructor stub
}
@override
protected void ondraw(canvas mcanvas) {
// todo auto-generated method stub
super.ondraw(mcanvas);
if (isdraw) {
log.i("tag", "111");
mcanvas.drawpath(mpath, paint);
mcanvas.drawbitmap(bitmap, 0, 0, null);// 从起点开始画
}
}
@override
public boolean ontouchevent(motionevent event) {
if (!isdraw) {
return true;
}
switch (event.getaction()) {
case motionevent.action_down:
touchdown(event.getx(), event.gety());
invalidate();// 刷新
break;
case motionevent.action_move:
touchmove(event.getx(), event.gety());
invalidate();// 刷新
break;
case motionevent.action_up:
touchup(event.getx(), event.gety());
invalidate();// 刷新
break;
default:
break;
}
return true;
}
private void touchup(float x, float y) {
// 画出路线
mpath.lineto(x, y);
canvas.drawpath(mpath, paint);
mpath.reset();
}
private void touchmove(float x, float y) {
float dx = math.abs(x - mx);
float dy = math.abs(y - my);
// 两点之间的距离大于touch_to_erance，就生成贝瑟尔曲线
if (dx >= touch_to_erance || dy >= touch_to_erance) {
// 用贝瑟尔实现平滑的曲线
// mpath.lineto(dx, dy);
mpath.quadto(mx, my, (x + mx) / 2, (y + my) / 2);
mx = x;
my = y;
}
}
private void touchdown(float x, float y) {
mpath.reset();// 重置路径
mpath.moveto(x, y);
mx = x;
my = y;
}
/**
 * @param bgcolor
 *   覆盖的背景颜色
 * @param paintstrokewidth
 *   橡皮擦宽度
 * @param touchtolerance
 *   填充距离
 */
public void beginrubber(final int bgcolor, final int paintstrokewidth,
float touchtolerance) {
touch_to_erance = touchtolerance;
paint = new paint();
// 画笔划过的痕迹变为透明
paint.setcolor(color.black);// 此处不能为透明
paint.setxfermode(new porterduffxfermode(porterduff.mode.dst_out));
paint.setantialias(true);// 变为光滑
paint.setstyle(style.stroke);// 空心和实心
paint.setstrokejoin(paint.join.round);// 前面圆角
paint.setstrokecap(paint.cap.round);// 后圆角
paint.setstrokewidth(paintstrokewidth);// 画笔宽度
// 覆盖
layoutparams layoutparams = getlayoutparams();
int height = layoutparams.height;
int width = layoutparams.width;
// if(layoutparams.height ==layoutparams.match_parent){
//
// }else{
//
// }
// 记录痕迹
mpath = new path();
bitmap = bitmap.createbitmap(width, height, config.argb_4444);// 4444占内存更少
canvas = new canvas(bitmap);
canvas.drawcolor(bgcolor);
isdraw = true;
}
}

以上代码附有注释，有哪里不明白的地方欢迎大家提出宝贵意见，谢谢大家一直以来对服务器之家网站的支持。