这篇文章主要为大家详细介绍了Android实现购物车功能的具体方法，具有一定的参考价值,需要的朋友可以参考下
最近看了一些淘宝购物车的demo，于是也写了一个。
效果图如下：
主要代码如下：
actvity中的代码：
public class ShoppingCartActivity extends BaseActivity {
private List<Test> data;
private ListView mListView;
private ShoppingCartAdapter adapter;
private RelativeLayout rlRefresh;
private TextView tvRefresh;
private ProgressBar barRefresh;
private LinearLayout clear;
private CheckBox checkBox_select_all;
private CheckBox checkBox_add;
private TextView integral_sum;
private int sum = 0;
private int[] sumIntegral;
private Context context;
@Override
protected void onCreate(Bundle bundle) {
// TODO Auto-generated method stub
super.onCreate(bundle);
setContentView(R.layout.activity_shopping_cart);
initView();
}
private void initView() {
context = this;
showpage = 1;
isPermitFlag = true;
data = new ArrayList<Test>();
// 测试数据
data.add(new Test("id", "color", "type", "100"));
data.add(new Test("id", "color", "type", "200"));
data.add(new Test("id", "color", "type", "300"));
data.add(new Test("id", "color", "type", "0"));
data.add(new Test("id", "color", "type", "300"));
data.add(new Test("id", "color", "type", "100"));
data.add(new Test("id", "color", "type", "500"));
data.add(new Test("id", "color", "type", "0"));
data.add(new Test("id", "color", "type", "900"));
adapter = new ShoppingCartAdapter(context, handler, data);
sumIntegral = new int[data.size() + 1];
checkBox_add = (CheckBox) findViewById(R.id.checkbox_add);
integral_sum = (TextView) findViewById(R.id.integral_sum);
clear = (LinearLayout) findViewById(R.id.clear);
clear.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
data.clear();
adapter.notifyDataSetChanged();
integral_sum.setText(0 + "");
checkBox_select_all.setChecked(false);
checkBox_add.setClickable(false);
}
});
checkBox_select_all = (CheckBox) findViewById(R.id.checkbox_select);
checkBox_select_all.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
HashMap<Integer, Boolean> isSelected = ShoppingCartAdapter
.getIsSelected();
Iterator iterator = isSelected.entrySet().iterator();
List<Boolean> array = new ArrayList<Boolean>();//列表中checkbox选中状态
List<Integer> nums = new ArrayList<Integer>();//列表中商品数量
while (iterator.hasNext()) {
HashMap.Entry entry = (HashMap.Entry) iterator.next();
Integer key = (Integer) entry.getKey();
Boolean val = (Boolean) entry.getValue();
array.add(val);
}
for (int i = 0; i < data.size(); i++) {
int num = data.get(i).getNum();
int integral = Integer.valueOf(data.get(i).getIntegral());
nums.add(num);
}
if (checkBox_select_all.isChecked()) {
for (int i = 0; i < data.size(); i++) {
ShoppingCartAdapter.getIsSelected().put(i, true);
}
checkBox_add.setChecked(true);
adapter.notifyDataSetChanged();
} else {
for (int i = 0; i < data.size(); i++) {
ShoppingCartAdapter.getIsSelected().put(i, false);
}
checkBox_add.setChecked(false);
adapter.notifyDataSetChanged();
integral_sum.setText(0 + "");
}
}
});
mListView= (ListView) findViewById(R.id.finance_list);
mListView.setAdapter(adapter);
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(context, position + "", Toast.LENGTH_LONG)
.show();
int pos = position - 1;
ViewHolder viewHolder = (ViewHolder) view.getTag();
int num = data.get(pos).getNum();
if (num == 0) {
Toast.makeText(context, "请选择商品数量", Toast.LENGTH_LONG)
.show();
} else {
boolean cu = !ShoppingCartAdapter.getIsSelected().get(pos);
ShoppingCartAdapter.getIsSelected().put(pos, cu);
adapter.notifyDataSetChanged();
//遍历获取列表中checkbox的选中状态
HashMap<Integer, Boolean> isSelected = ShoppingCartAdapter
.getIsSelected();
Iterator iterator = isSelected.entrySet().iterator();
List<Boolean> array = new ArrayList<Boolean>();
while (iterator.hasNext()) {
HashMap.Entry entry = (HashMap.Entry) iterator.next();
Integer key = (Integer) entry.getKey();
Boolean val = (Boolean) entry.getValue();
array.add(val);
}
if (Test.isAllFalse(array)) {
checkBox_select_all.setChecked(false);
checkBox_add.setChecked(false);
}
if (Test.isAllTrue(array)) {
checkBox_select_all.setChecked(true);
checkBox_add.setChecked(true);
}
if (Test.isHaveOneFasle(array)) {
checkBox_select_all.setChecked(false);
}
if (Test.isHaveOneTrue(array)) {
checkBox_add.setChecked(true);
}
}
}
});
}
@SuppressLint("HandlerLeak")
private Handler handler = new Handler(){
@SuppressWarnings("unchecked")
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if(msg.what == 10){ //更改选中商品的总价格
float price = (Float)msg.obj;
if(price > 0){
integral_sum.setText(price+"");
}else{
integral_sum.setText("0");
}
}
else if(msg.what == 11){
//列表选中状态
List<Boolean> array = (List<Boolean>) msg.obj;
if (Test.isAllFalse(array)) {
checkBox_select_all.setChecked(false);
checkBox_add.setChecked(false);
}
if (.isAllTrue(array)) {
checkBox_select_all.setChecked(true);
checkBox_add.setChecked(true);
}
if (Test.isHaveOneFasle(array)) {
checkBox_select_all.setChecked(false);
}
if (Test.isHaveOneTrue(array)) {
checkBox_add.setChecked(true);
}
}
}
};
