详谈自定义View之GridView单选 金额选择Layout-ChooseMoneyLayout

思路：

外层控件用的是gridview，里面每个item放一个framelayout，framelayout里面有checkbox和imageview，chechbox添加background实现选中效果,选中背景为透明，显示item的勾勾图标，不选中checkbox就有背景，挡住选中的勾勾。。重写gridview，实现监听和数据适配，用一个接口返回选中的数据。

代码：

choosemoneylayout.java

public class choosemoneylayout extends gridview {
 
  private int[] moneylist = {};  //数据源
 
  private layoutinflater minflater; 
 
  private myadapter adapter;  //适配器
 
  int defaultchoose = 0;   //默认选中项
 
  public choosemoneylayout(context context, attributeset attrs) {
    super(context, attrs);
    setdata();
  }
 
  public void setdata() {
    minflater = layoutinflater.from(getcontext());
    //配置适配器
    adapter = new myadapter();
    setadapter(adapter);
  }
 
  /**
   * 设置默认选择项目，
   * @param defaultchoose
   */
  public void setdefaultpositon(int defaultchoose) {
    this.defaultchoose = defaultchoose;
    adapter.notifydatasetchanged();
  }
 
  /**
   * 设置数据源
   * @param moneydata
   */
  public void setmoneydata(int[] moneydata){
    this.moneylist = moneydata;
  }
 
  class myadapter extends baseadapter {
 
 
    private checkbox checkbox;
 
 
    @override
    public int getcount() {
      return moneylist.length;
    }
 
    @override
    public object getitem(int position) {
      return moneylist[position];
    }
 
    @override
    public long getitemid(int position) {
      return position;
    }
 
    @override
    public view getview(final int position, view convertview, viewgroup parent) {
      myviewholder holder;
      if (convertview == null) {
        holder = new myviewholder();
        convertview = minflater.inflate(r.layout.item_money_pay, parent, false);
        holder.moneypaycb = (checkbox) convertview.findviewbyid(r.id.money_pay_cb);
        convertview.settag(holder);
      } else {
        holder = (myviewholder) convertview.gettag();
      }
 
      holder.moneypaycb.settext(getitem(position) + "元");
 
      holder.moneypaycb.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener() {
        @override
        public void oncheckedchanged(compoundbutton buttonview, boolean ischecked) {
          if (ischecked) {
            //设置选中文字颜色
            buttonview.settextcolor(getresources().getcolor(r.color.light_color_blue));
 
            //取消上一个选择
            if (checkbox != null) {
              checkbox.setchecked(false);
            }
            checkbox = (checkbox) buttonview;
          } else {
            checkbox = null;
            //设置不选中文字颜色
            buttonview.settextcolor(getresources().getcolor(r.color.darkgray));
          }
          //回调
          listener.choosemoney(position, ischecked, (integer) getitem(position));
        }
      });
 
 
      if (position == defaultchoose) {
        defaultchoose = -1; 
        holder.moneypaycb.setchecked(true);
        checkbox = holder.moneypaycb;
      }
 
      return convertview;
    }
 
 
    private class myviewholder {
      private checkbox moneypaycb;
    }
  }
 
 
  /**
   * 解决嵌套显示不完
   * @param widthmeasurespec
   * @param heightmeasurespec
   */
  @override
  public void onmeasure(int widthmeasurespec, int heightmeasurespec) {
 
    int expandspec = measurespec.makemeasurespec(integer.max_value >> 2,
        measurespec.at_most);
    super.onmeasure(widthmeasurespec, expandspec);
  }
 
  private onchosemoneylistener listener;
 
  public void setonchosemoneylistener(onchosemoneylistener listener) {
    this.listener = listener;
  }
 
  public interface onchosemoneylistener {
    /**
     * 选择金额返回
     *
     * @param position gridview的位置
     * @param ischeck 是否选中
     * @param moneynum 钱数
     */
    void choosemoney(int position, boolean ischeck, int moneynum);
  }
}

item_money_pay.xml

 

<?xml version="1.0" encoding="utf-8"?>
<framelayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="80dp"
  android:descendantfocusability="blocksdescendants">
 
<!-- 选中时候的图片 -->
  <imageview
    android:layout_width="15dp"
    android:layout_height="15dp"
    android:layout_gravity="right|bottom"
    android:layout_marginbottom="3dp"
    android:layout_marginright="3dp"
    android:maxheight="9dp"
    android:maxwidth="9dp"
    android:scaletype="fitcenter"
    android:src="@drawable/money_pay_type_choose" />
 
  <checkbox
    android:id="@+id/money_pay_cb"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:background="@drawable/money_pay_selector"
    android:button="@null"
    android:gravity="center"
    android:paddingbottom="2.5dp"
    android:paddingleft="15dp"
    android:paddingright="15dp"
    android:paddingtop="2.5dp"
    android:textsize="20sp"
    android:textcolor="#ff777777"
    />
 
</framelayout>

 checkbox的background: money_pay_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 
  <item android:state_pressed="true" android:drawable="@drawable/blue_border_noback_drawable"/>
  <item android:state_selected="true" android:drawable="@drawable/blue_border_noback_drawable"/>
  <item android:state_checked="true" android:drawable="@drawable/blue_border_noback_drawable"/>
 
  <item >
 
    <shape>
      <solid android:color="#ffffffff"/>
      <corners android:radius="5dp"/>
      <stroke android:color="#ffbfbfbf"
        android:width="1dp"/>
    </shape>
 
  </item>
 
</selector>

activity xml:

<com.minstone.view.choosemoneylayout
      android:id="@+id/money_chose_money"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_margin="10dp"
      android:horizontalspacing="17dp"
      android:numcolumns="3"
      android:verticalspacing="20dp" />

activity里面代码:

private choosemoneylayout moneychosemoney;
  private int money; //当前选择的金额
 
  private void initdata() {
    //获取控件
    moneychosemoney = (choosemoneylayout)findviewbyid(r.id.money_chose_money);
    //数设置据源
    moneychosemoney.setmoneydata(new int[]{30, 50, 100, 200, 300, 500,1000});
    //设置默认选中项
    moneychosemoney.setdefaultpositon(3);
    //金额选择监听
    moneychosemoney.setonchosemoneylistener(new choosemoneylayout.onchosemoneylistener() {
      @override
      public void choosemoney(int position,boolean ischeck, int moneynum) {
        if(ischeck){
          money = moneynum;
          toastutil.showcustomtoast(payactivity.this,money+"");
        }else{
          money = 0;
        }
      }
    });
 
  }

以上这篇详谈自定义view之gridview单选 金额选择layout-choosemoneylayout就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。