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

概述思路：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

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,int moneyNum) {        if(isCheck){          money = moneyNum;          ToastUtil.showCustomToast(PayActivity.this,money+"");        }else{          money = 0;        }      }    });   }

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