Question

我是android的新手，帮助代码如何使用BaseAdapter通过单击Button将EditText值添加到ListView。当我在EditText中输入值并单击添加按钮时，值必须放在ListViw中（ListView必须只有BaseAdapter）

ListDataActivity.java

public class ListDataActivity {
String myData;

public String getMyData()
{
    return myData;
}
public  void setMyData(String myDataa)
{
    myData=myDataa;
}}

BaseAdapterActivity.java

public class MyBaseAdapterActivity extends BaseAdapter {

ArrayList<ListDataActivity> list =new ArrayList<ListDataActivity>();
LayoutInflater inflater;
Context context;

public MyBaseAdapterActivity(Context context,ArrayList<ListDataActivity>list)
{
    this.list=list;
    this.context=context;
    inflater = LayoutInflater.from(this.context);
}

@Override
public int getCount() {
    return list.size();
}

@Override
public Object getItem(int position) {
    return list.get(position);
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    MyViewHolder myViewHolder;

    if (convertView==null)
    {
        convertView=inflater.inflate(R.layout.activity_addlist,parent,false);
        myViewHolder=new MyViewHolder(convertView);
        convertView.setTag(myViewHolder);
    }else {
        myViewHolder =(MyViewHolder)convertView.getTag();
    }
    ListDataActivity listDataActivity = getItemId(position);

    myViewHolder.mydata.setText(listDataActivity.getMyData());

    return convertView;
}
private class MyViewHolder{
    String mydata;

    public MyViewHolder(View item)
    {
        mydata=(ListView)item.findViewById(R.id.myData);
    }
}}

AddListActivity.java

public class AddlistActivity extends Activity {
ListView lstName;
Button btnAdd;
EditText edtName;
String myData;
Context context=AddlistActivity.this;
ArrayList<ListDataActivity>list=new ArrayList<ListDataActivity>();

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

    lstName=(ListView)findViewById(R.id.lst_name);
    btnAdd=(Button)findViewById(R.id.btn_add);
    edtName=(EditText)findViewById(R.id.edt_name);
    getDataInList();

    btnAdd.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            myData=edtName.getText().toString().trim();
        }
    });

    lstName.setAdapter(new MyBaseAdapterActivity(context,list));
}
private void getDataInList()
{
    for (int i = 0 ; i < myData.length();i++)
    {
        ListDataActivity listDataActivity = new ListDataActivity();
        listDataActivity.setMyData(myData[i]);
        list.add(listDataActivity);
    }
}}

Answer 1

要在点击按钮时将值从编辑文本存储到列表视图，请在按钮上单击以下步骤：

从editText获取文本并存储在String中。

    String myText=editText.getText().toString().trim();

然后将其保存到您的arraylist（您将用于通过BaseAdapter将数据提供到列表视图的数据结构）。
```
      ArrayList<String> stockList = new ArrayList<String>();
        stockList.add(myText);
```
主要是这个arraylist会有你的edittext数据然后你有调用adapter.notifydatasetchanged（）;

感谢

如何通过单击按钮

1 个答案: