android

ListView中如何添加删除按钮

我们在安卓开发中有时候会需要这样一个功能,就是在一个listView上显示一个列表,列表上需要有一个删除按钮,点击相应的删除按钮则删除该条信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
public class Test_4_Activity extends Activity {
    private DeletableAdapter adapter;
    private ArrayList<String> text;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test4);
         ListView list_view = (ListView) findViewById(R.id.list_view);
         text = new ArrayList<String>();
         text.add(＂Android_001＂);
         text.add(＂Android_002＂);
         text.add(＂Android_003＂);
         text.add(＂Android_004＂);
         // 初始化数据结束
         adapter = new DeletableAdapter(this, text);
         list_view.setAdapter(adapter);
         // list_view.setSelector(R.drawable.list_select_color);
         Button button = (Button) findViewById(R.id.button);
         button.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 text.add(＂10000＂);
                 adapter.notifyDataSetChanged();
             }
         });
     }
 }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
public class DeletableAdapter extends BaseAdapter {
    private Context context;
    private ArrayList<String> text;
    public DeletableAdapter(Context context, ArrayList<String> text) {
        this.context = context;
        this.text = text;
    }
     @Override
     public int getCount() {
         // TODO Auto-generated method stub
         return text.size();
     }
     @Override
     public Object getItem(int position) {
         // TODO Auto-generated method stub
         return text.get(position);
     }
     @Override
     public long getItemId(int position) {
         // TODO Auto-generated method stub
         return position;
     }
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         // TODO Auto-generated method stub
         final int index = position;
         View view = convertView;
         if (view == null) {
             LayoutInflater inflater = (LayoutInflater) context
                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             view = inflater.inflate(R.layout.row_simple_list_item_2, null);
         }
         final TextView textView = (TextView) view
                 .findViewById(R.id.simple_item_1);
         textView.setText(text.get(position));
         final ImageView imageView = (ImageView) view
                 .findViewById(R.id.simple_item_2);
         imageView.setBackgroundResource(android.R.drawable.ic_delete);
         imageView.setTag(position);
         imageView.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 text.remove(index);
                 notifyDataSetChanged();
                 Toast.makeText(context, textView.getText().toString(),
                         Toast.LENGTH_SHORT).show();
             }
         });
         return view;
     }
 }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
<?xml version=＂1.0＂ encoding=＂utf-8＂?>
<RelativeLayout xmlns:android=＂http://schemas.android.com/apk/res/android＂
    android:layout_width=＂fill_parent＂
    android:layout_height=＂wrap_content＂>
    <ImageView
        android:id=＂@+id/simple_item_2＂
        android:layout_width=＂wrap_content＂
        android:layout_height=＂fill_parent＂
        android:layout_alignParentRight=＂true＂
        android:focusable=＂false＂ />
     <TextView
        android:id=＂@+id/simple_item_1＂
        android:layout_width=＂fill_parent＂
        android:layout_height=＂fill_parent＂
        android:layout_alignParentLeft=＂true＂ />
</RelativeLayout>