2015年6月六级真题,一路向西快播观看,濠江岁月
前言：公司需求，自己写的一个弧形菜单！
效果：
开发环境：androidstudio2.2.1+gradle-2.14.1
涉及知识：1.自定义控件，2.事件分发等
部分代码：
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public class homepagemenulayout extends viewgroup {
private context context;
// 菜单项的文本
private string[] mitemtexts = null;
private int statusheight;//状态栏高度
public homepagemenulayout(context context, attributeset attrs) {
super(context, attrs);
this.context = context;
statusheight = screenutils.getstatusheight(context);
}
/**
* 设置布局的宽高，并策略menu item宽高
*/
int reswidth = 0;
int resheight = 0;
int mradius = 0;
@override
protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
//布局宽高尺寸设置为屏幕尺寸
//设置该布局的大小
setmeasureddimension(widthmeasurespec, heightmeasurespec);
/**
* 根据传入的参数，分别获取测量模式和测量值
*/
int width = measurespec.getsize(widthmeasurespec);
resheight = measurespec.getsize(heightmeasurespec);
reswidth = measurespec.getsize(widthmeasurespec);
// 获得半径
mradius = (int) (resheight / 2 - 2 * statusheight);
//设置item尺寸
int childsize = (int) (mradius * 1 / 2);
// menu item测量模式--精确模式
int childmode = measurespec.exactly;
for (int i = 0; i < getchildcount(); i++) {
final view child = getchildat(i);
if (child.getvisibility() == gone) {
continue;
}
// 计算menu item的尺寸；以及和设置好的模式，去对item进行测量
int makemeasurespec = -1;
makemeasurespec = measurespec.makemeasurespec(childsize, childmode);
child.measure(makemeasurespec, makemeasurespec);
}
}
/**
* item布局的角度
*/
private int[] widthall = null;
/**
* 设置item的位置：第一个参数1：该参数指出当前viewgroup的尺寸或者位置是否发生了改变
* 2.当期绘图光标横坐标位置
* 3.当前绘图光标纵坐标位置
*/
@override
protected void onlayout(boolean changed, int l, int t, int r, int b) {
int left, top;
int cwidth = (int) (mradius * 1 / 2);
final int childcount = getchildcount();
// 计算，中心点到menu item中心的距离
float tmp = mradius - cwidth / 2;
// 遍历去设置menuitem的位置
for (int i = 0; i < childcount; i++) {
final view child = getchildat(i);
if (child.getvisibility() == gone) {
continue;
}
left = (int) (mradius * math.cos(math.toradians(widthall[i]))) - 65;
top = (int) (mradius - (resheight / 2 - 2 * statusheight) * math.sin(math.toradians(widthall[i])) - statusheight);
child.layout(left, top, left + cwidth, top + cwidth);
}
}
public interface onmenuitemclicklistener {
void itemclick(view view, int pos);
}
public void setonmenuitemclicklistener(
onmenuitemclicklistener monmenuitemclicklistener) {
this.monmenuitemclicklistener = monmenuitemclicklistener;
}
// 菜单的个数
private int mmenuitemcount;
/**
* 设置菜单条目的图标和文本
*/
public void setmenuitemiconsandtexts(string[] mitemtexts) {
this.mitemtexts = mitemtexts;
this.mmenuitemcount = mitemtexts.length;
resultangle();
addmenuitems();
}
private void resultangle() {
switch (this.mmenuitemcount) {
case 3:
widthall = constants.item3;
break;
case 4:
widthall = constants.item4;
break;
case 5:
widthall = constants.item5;
break;
case 6:
widthall = constants.item6;
break;
case 7:
widthall = constants.item7;
break;
case 8:
widthall = constants.item8;
break;
case 9:
widthall = constants.item9;
break;
case 10:
widthall = constants.item10;
break;
default:
break;
}
}
/**
* 设置菜单条目的图标和文本
*/
public void setmenuitemiconsandtexts() {
addmenuitems();
}
private int mmenuitemlayoutid = r.layout.homepage_item_layout;
/**
* menuitem的点击事件接口
*/
private onmenuitemclicklistener monmenuitemclicklistener;
private float yposition = 0;
/**
* 添加菜单项
*/
private void addmenuitems() {
layoutinflater minflater = layoutinflater.from(getcontext());
/**
* 根据用户设置的参数，初始化view
*/
for (int i = 0; i < mmenuitemcount; i++) {
final int j = i;
view view = minflater.inflate(mmenuitemlayoutid, this, false);
final imageview iv = (imageview) view
.findviewbyid(r.id.homepage_pager1_item_img);
final textview tv = (textview) view
.findviewbyid(r.id.homepage_pager1_item_tv);
if (iv != null) {
iv.setimageresource(r.mipmap.menu_ture);
}
if (tv != null) {
tv.settext(mitemtexts[i]);
}
view.findviewbyid(r.id.homepage_item_layout).setonclicklistener(new onclicklistener() {
@override
public void onclick(view v) {}
});
view.findviewbyid(r.id.homepage_item_layout).setontouchlistener(new ontouchlistener() {
@override
public boolean ontouch(view v, motionevent event) {
if (event.getaction() == motionevent.action_down) {
yposition = event.gety();//获取按下的位置
iv.setimageresource(r.mipmap.menu);
} else if (event.getaction() == motionevent.action_up) {
iv.setimageresource(r.mipmap.menu_ture);
float displacement = math.abs(yposition - event.gety());
//精确按下的位置做出响应
if (monmenuitemclicklistener != null&&displacement<25) {
monmenuitemclicklistener.itemclick(v,j);
}
} else if (event.getaction() == motionevent.action_cancel || event.getaction() == motionevent.action_pointer_up) {
iv.setimageresource(r.mipmap.menu_ture);
}
return true;
}
});
addview(view);
}
}
}
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