Question

我是Android工作室的初学者，我正在尝试创建一个应用程序。我有一个问题：我有一个自定义ListView，当我点击一个按钮（打开一个带有editText的对话框）时，我想向这个ListView添加项目。但我不成功！目前我成功地将项目添加到一个简单的列表视图中，但我现在想要将项目添加到我的自定义ListView中：

这是我的自定义ListView（我的灵感来自互联网）：

public class CustomList extends ArrayAdapter<String> {
private final Activity context;
private  String[] web;
private final Integer[] imageId;
public CustomList(Activity context,
                  String[] web, Integer[] imageId) {
    super(context, R.layout.list_single, web);
    this.context = context;
    this.web = web;
    this.imageId = imageId;
 }
@Override
public View getView(int position, View view, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    View rowView= inflater.inflate(R.layout.list_single, null, true);
    TextView txtTitle = (TextView) rowView.findViewById(R.id.txt);
    ImageView imageView = (ImageView) rowView.findViewById(R.id.img);
    txtTitle.setText(web[position]);
    imageView.setImageResource(imageId[position]);
    return rowView;
 }

}

这是我现在的代码，但只是将项目添加到“普通”ListView

public class MenuActivity extends Activity {
ListView listplayer=null;
ImageButton addButton = null;
/** Items entered by the user is stored in this ArrayList variable */
ArrayList<String> list = new ArrayList<String>();

/** Declaring an ArrayAdapter to set items to ListView */
ArrayAdapter<String> adapter;



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


    listplayer=(ListView) findViewById(R.id.list);
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);



    addButton = (ImageButton) findViewById(R.id.buttonaddplayer);
    addButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Create custom dialog object
            final Dialog dialog = new Dialog(MenuActivity.this);
            dialog.setTitle(getResources().getString(R.string.addperson));
            // Include dialog.xml file
            dialog.setContentView(R.layout.dialoglayout);
            // Set dialog title
           // dialog.setTitle("Custom Dialog");

            // set values for custom dialog components - text, image and button
            final EditText text = (EditText) dialog.findViewById(R.id.editTextdialog);


            dialog.show();

            ImageButton validButton = (ImageButton) dialog.findViewById(R.id.imageButtonvalid);
            // if decline button is clicked, close the custom dialog
            validButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    list.add(text.getText().toString());
                    text.setText("");
                    adapter.notifyDataSetChanged();


                    dialog.dismiss();
                }
            });
            listplayer.setAdapter(adapter);





        }
    });

}

感谢您帮助我。事实上我想做一个你可以添加播放器的应用程序，但是smth“漂亮”而不是android工作室的法线列表视图

Answer 1

阅读此on adapters

检查here

找出你的'数据'的位置。

onButtonClick（） - ＆gt;将新项插入适配器数据的“head”，调用'notifyDataSetChanged（）'来更新视图

如何将项添加到自定义ListView

1 个答案: