Question

我创建了两个自定义listView，都有两个textView和一个EditText，我想显示在edittext中输入的所有记录在第二个自定义ListView上接受textView但是当我点击按钮获取记录时，它只显示最后一个记录在第二个自定义listView！

enter image description here

public class Mmnue extends Activity {

ArrayList<HashMap<String, String>> MyArrList;
String rate ;
String name ;
String quant;

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.menuitem);
    final ListView lisView1 = (ListView)findViewById(R.id.listView1);
    final ListView lisView2 = (ListView)findViewById(R.id.listView2);


    MyArrList = new ArrayList<HashMap<String, String>>();

    HashMap<String, String> map;

    /*** Rows 1 ***/
    map = new HashMap<String, String>();
    map.put("ID", "Butterscotch");
    map.put("Code", "Rs 10");
    MyArrList.add(map);

    /*** Rows 2 ***/
    map = new HashMap<String, String>();
    map.put("ID", "Birthday Cake");
    map.put("Code", "Rs 100");
    MyArrList.add(map);

    /*** Rows 3 ***/
    map = new HashMap<String, String>();
    map.put("ID", "Black  Crunch");
    map.put("Code", "Rs 102");
    MyArrList.add(map);

    /*** Rows 4 ***/
    map = new HashMap<String, String>();
    map.put("ID", "Industrial Chocolate");
    map.put("Code", "Rs 200");
    MyArrList.add(map);

    /*** Rows 5 ***/
    map = new HashMap<String, String>();
    map.put("ID", "Coffee Molasses Chip");
    map.put("Code", " Rs 500");
    MyArrList.add(map);    




    lisView1.setAdapter(new CountryAdapter(this));






    Button btnGetItem = (Button) findViewById(R.id.btnGetItem);
    btnGetItem.setOnClickListener(new OnClickListener() 
    {
    public void onClick(View v) 
    {


    int count = lisView1.getAdapter().getCount();
    for (int i = 0; i < count; i++) {
    LinearLayout itemLayout = (LinearLayout)lisView1.getChildAt(i); // Find by under   LinearLayout
    TextView itemname = (TextView)itemLayout.findViewById(R.id.nm);

    TextView rat = (TextView)itemLayout.findViewById(R.id.rat);

    EditText quan = (EditText)itemLayout.findViewById(R.id.txtInput);

    rate = rat.getText().toString();
     quant = quan.getText().toString();
     name = itemname.getText().toString();

    Toast.makeText(Mmnue.this,name + ", " + rate+ " , " +quant   ,Toast.LENGTH_LONG).show(); 
    lisView2.setAdapter(new CountryAdapter2(getApplicationContext()));

    }




    }
    });



    }


    public class CountryAdapter extends BaseAdapter
    {
    private Context context;

    public CountryAdapter(Context c)
    {
    //super( c, R.layout.activity_column, R.id.rowTextView, );
    // TODO Auto-generated method stub
    context = c;
    }

    public int getCount() {
    // TODO Auto-generated method stub
    return MyArrList.size();
    }

    public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
    }

    public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
    }
    public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
     LayoutInflater inflater = (LayoutInflater) context
    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
    convertView = inflater.inflate(R.layout.activity_mmnue, null);

    }

    // ColID
    TextView txtID = (TextView) convertView.findViewById(R.id.nm);

    txtID.setText(MyArrList.get(position).get("ID") +".");

    // ColCode
    TextView txtCode = (TextView) convertView.findViewById(R.id.rat);
    txtCode.setText(MyArrList.get(position).get("Code"));


    return convertView;

    }

    }

    public class CountryAdapter2 extends BaseAdapter
    {
    private Context context;

    public CountryAdapter2(Context c)
    {
    //super( c, R.layout.activity_column, R.id.rowTextView, );
    // TODO Auto-generated method stub
    context = c;
    }


    public int getCount() {
    // TODO Auto-generated method stub
        return MyArrList.size();
    }

    public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
    }

    public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
    }
    public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
     LayoutInflater inflater = (LayoutInflater) context
    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
    convertView = inflater.inflate(R.layout.activity_mmnue, null);

    }

    // ColID
    TextView txtID = (TextView) convertView.findViewById(R.id.nm);
    //txtID.setText(MyArrList.get(position).get("ID") +".");
    txtID.setText(name);
    // ColCode
    TextView txtCode = (TextView) convertView.findViewById(R.id.rat);
//  txtCode.setText(MyArrList.get(position).get("Code"));
    txtCode.setText(rate);

    EditText quan = (EditText) convertView.findViewById(R.id.txtInput);
//  txtCode.setText(MyArrList.get(position).get("Code"));
    quan.setText(quant);
    Toast.makeText(getApplicationContext(),""+quant+""+rate+""+name,  Toast.LENGTH_LONG).show();

    return convertView;

    }

    }

Answer 1

我不确定您究竟在问什么，但似乎您希望将ListView1中公开的相同数据复制到ListView2。由于ListViews由Adapters支持，而你的是CountryAdapter，因此其中有一个ArrayList。您可以添加一个名为public ArrayList getData()的方法，该方法返回您的ArrayList，以便您可以填充ListView2。

Answer 2

在for循环中，您将名称，quant和rate存储在每次循环时都会被覆盖的变量中。要解决这个问题，您可以考虑将所有值存储在数组中，然后一旦拥有整个数据数组，就可以更新第二个listView。

您的问题点

for (int i = 0; i < count; i++) {
LinearLayout itemLayout = (LinearLayout)lisView1.getChildAt(i); // Find by under   LinearLayout
    TextView itemname = (TextView)itemLayout.findViewById(R.id.nm);

    TextView rat = (TextView)itemLayout.findViewById(R.id.rat);

    EditText quan = (EditText)itemLayout.findViewById(R.id.txtInput);

    rate = rat.getText().toString();
     quant = quan.getText().toString();
     name = itemname.getText().toString();

一个解决方案

String rate[count], quant[count], name[count];
for (int i = 0; i < count; i++) {
    LinearLayout itemLayout = (LinearLayout)lisView1.getChildAt(i); // Find by under   LinearLayout
        TextView itemname = (TextView)itemLayout.findViewById(R.id.nm);

        TextView rat = (TextView)itemLayout.findViewById(R.id.rat);

        EditText quan = (EditText)itemLayout.findViewById(R.id.txtInput);

        rate[i] = rat.getText().toString();
         quant[i] = quan.getText().toString();
         name[i] = itemname.getText().toString();

在按钮上单击，更改数据集并使用adapter.notifyDataSetChanged()更新listView

Button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // Change ListView Data Set
                adapter.notifyDataSetChanged();
            }

        });

我想在Button Click Event上显示一个Custom listLiew的所有记录到另一个Custom ListView

2 个答案: