Question

在以下代码中这是我的主要活动我选择各种产品并继续进行但当我检查多个或一个时，它传递0值; 在Toast中我没有得到如下图像

中的任何内容

public class MainActivity extends ListActivity {

ListView list;
Button btn1;
String url="";
private ArrayList <Product>  allProducts = new ArrayList<Product>();
private ProductAdapter adapter;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

    btn1 = (Button) findViewById(R.id.btn);
    list = getListView();


    url="http://192.168.1.100/test/product.txt?id=";//+d.getInt("id");


    try{
        ConnectivityManager c =(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);                  
        NetworkInfo n =c.getActiveNetworkInfo();
        if (n!= null && n.isConnected()){

            Log.d("url*********",url);

            new Background().execute(url);
        }
       }catch(Exception e){}
adapter = new ProductAdapter(this,allProducts);
setListAdapter(adapter);
getListView().setItemsCanFocus(false);

btn1.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {


    StringBuffer responseText = new StringBuffer();
    responseText.append("The following were selected...\n");


    for(int i=0;i<allProducts.size();i++){
     Product product = allProducts.get(i);
     if(product.isChecked()){
      responseText.append("\n" + product.getProduct_name());
     }
    }

    Toast.makeText(getApplicationContext(),
      responseText, Toast.LENGTH_LONG).show();



}
});


}

这是ProductAdapter

 public class ProductAdapter extends ArrayAdapter<Product> {




ArrayList<Product> allProducts;
LayoutInflater vi;
int Resource;

Context context;

public ProductAdapter (Context context ,ArrayList<Product> objects)
{
    super(context, R.layout.productrow, objects);

    allProducts = objects;
    this.context = context;


}
@Override
 public View getView(int position, View convertView, ViewGroup parent) {
 // TODO Auto-generated method stub
 LayoutInflater inflater = ((Activity)context).getLayoutInflater();
 convertView = inflater.inflate(R.layout.productrow, parent, false); 
 TextView name = (TextView) convertView.findViewById(R.id.price);
 CheckBox cb = (CheckBox) convertView.findViewById(R.id.cb1);

 int s = allProducts.get(position).getProduct_price();
 name.setText(Integer.toString(s));
 cb.setText(allProducts.get(position).getProduct_name());
 if(allProducts.get(position).isChecked())
 cb.setChecked(true);
 else
 cb.setChecked(false);
 return convertView;
 }
}

我的Product.java文件是我的模型

public class Product {

int product_id;

private boolean checked = false ;

    public boolean isChecked() {
    return checked;
}

public void setChecked(boolean checked) {
    this.checked = checked;
}

    String product_name;

   int product_price;

   int product_qunatity;

   int hotel_id;

public int getProduct_id() {
    return product_id;
}

public void setProduct_id(int product_id) {
    this.product_id = product_id;
}

public String getProduct_name() {
    return product_name;
}

public void setProduct_name(String product_name) {
    this.product_name = product_name;
}

public int getProduct_price() {
    return product_price;
}

public void setProduct_price(int product_price) {
    this.product_price = product_price;
}

public int getProduct_qunatity() {
    return product_qunatity;
}

public void setProduct_qunatity(int product_qunatity) {
    this.product_qunatity = product_qunatity;
}

public int getHotel_id() {
    return hotel_id;
}

public void setHotel_id(int hotel_id) {
    this.hotel_id = hotel_id;
}



}

Img Of screen Shot

Answer 1

好的，有复选框CheckBox cb = (CheckBox) convertView.findViewById(R.id.cb1);的声明，但听众在哪里？

我假设你需要添加监听器：

@Override
 public View getView(int position, View convertView, ViewGroup parent) {
   //your code goes here
   cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    Log.i(TAG, "Entered onCheckedChanged()");
      //other stuff for listener
      }
   });
}

在Custom ListActivity中实现Checkbox

1 个答案: