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

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);  }}

<?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>

<?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>

<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" />

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;        }      }    });   }