如何在自定义 ListView 的 arraylist 中添加 EditText 值

Question

我在我的第一个自定义 ListView 中创建了两个 TextView 和一个 EditText，我想在 Arraylist 中添加/存储 EditText 值，因为我想在第二个自定义 ListView 中一个一个地显示 EditText 值，所以如何做到这一点请给出提示或代码来解决这个问题..

public class Mmenu extends Activity {
ArrayList<Candy> myArrList;
ArrayList<String> editTextValues;

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

    myArrList = new ArrayList<Candy>();
    editTextValues = new ArrayList<String>();
    final ListView lisView1 = (ListView)findViewById(R.id.listView1);
    final ListView lisView2 = (ListView)findViewById(R.id.listView2);

    myArrList.add(new Candy("Butterscotch", "Rs 10"));
    myArrList.add(new Candy("Birthday Cake", "Rs 100"));
    myArrList.add(new Candy("Black Crunch", "Rs 102"));
    myArrList.add(new Candy("Industrial Chocolate", "Rs 200"));
    myArrList.add(new Candy("Coffee Molasses Chip", "Rs 500"));      


    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);

            EditText text = (EditText)findViewById(R.id.txtInput);
            String value = text.getText().toString();
            editTextValues.add(value);
            Toast.makeText(getApplicationContext(),"10"+value,   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.views, null);
     }
    // ColID
    TextView txtID = (TextView) convertView.findViewById(R.id.nm);
    txtID.setText(myArrList.get(position).getID() +".");
    // ColCode
    TextView txtCode = (TextView) convertView.findViewById(R.id.rat);
    txtCode.setText(myArrList.get(position).getCode());
    return convertView;

    }
     }
    public class CountryAdapter2 extends BaseAdapter
    {
    private Context context;
    public CountryAdapter2(Context c)
    {
        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.newviews, null);
    }

    // ColID
    TextView txtID = (TextView) convertView.findViewById(R.id.nm);
    txtID.setText(myArrList.get(position).getID() +".");
    // ColCode
    TextView txtCode = (TextView) convertView.findViewById(R.id.rat);
    txtCode.setText(myArrList.get(position).getCode());
    return convertView;

    }

Answer 1

首先，您每次都创建一个新的HashMap<String, String> 会浪费大量空间。不知道为什么你会有ArrayList 的HashMaps。拥有其中一个就足够了。

您可以像这样创建一个名为 Candy 的类：

class Candy {
    private String id;
    private String code;
    Candy(String id, String code) {
        this.id = id;
        this.code = code;
    }
    public String getID() { return this.id; }
    public String getCode() { return this.code; }
}

然后你可以定义你的ArrayList并在onCreate()的开头实例化它：

// Don't use starting capital letters for methods, classes have first capital letter
// I renamed MyArrList to myArrList
ArrayList<Candy> myArrList;
// ...
void onCreate() {
// ...
    myArrList = new ArrayList<Candy>();
// ...
}

然后像这样填充它：

myArrList.add(new Candy("Butterscotch", "Rs 10"));
myArrList.add(new Candy("Birthday Cake", "Rs 100"));
myArrList.add(new Candy("Black Crunch", "Rs 102"));
myArrList.add(new Candy("Industrial Chocolate", "Rs 200"));
myArrList.add(new Candy("Coffee Molasses Chip", "Rs 500"));

现在您可以使用名为getID() 和getCode() 的Candy 类的getter 方法。

变化：

// 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"));

收件人：

// ColID
TextView txtID = (TextView) convertView.findViewById(R.id.nm);
txtID.setText(myArrList.get(position).getID() +".");
// ColCode
TextView txtCode = (TextView) convertView.findViewById(R.id.rat);
txtCode.setText(myArrList.get(position).getCode());

现在回答您的问题，我假设您要将EditText 字段中的文本存储到ArrayList 中。

您可以创建另一个类ArrayList 对象来保存String 对象并在onCreate() 中实例化它。

ArrayList<String> editTextValues;
// ...
void onCreate() {
// ...
    editTextValues = new ArrayList<String>();
// ...
}

现在您只需将 EditText 中的文本添加到此 ArrayList：

EditText text = (EditText)findViewById(R.id.YOUR_ID);
String value = text.getText().toString();
editTextValues.add(value);

然后在需要的地方使用editTextValues。