标题 | 安卓开发中动态添加lsitView 代码实例 |
范文 | 这个很简单 就是为了说明别忘了adapter.notifyDataSetChanged(); 唤醒一下,其实这个唤醒也就是在button下用 或者在别的控件下调用 如果是在getView下就不必了 java代码: public class DynamicListItems extends ListActivity { private static final String ITEM_KEY = "key"; ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>(); private SimpleAdapter adapter; private EditText newValue; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dynamic_list); newValue = (EditText) findViewById(R.id.new_value_field); setListAdapter(new SimpleAdapter(this, list, R.layout.row, new String[] { ITEM_KEY }, new int[] { R.id.list_value })); ((ImageButton) findViewById(R.id.button)).setOnClickListener(getBtnClickListener()); } private OnClickListener getBtnClickListener() { return new OnClickListener() { public void onClick(View view) { try { HashMap<String, String> item = new HashMap<String, String>(); item.put(ITEM_KEY, newValue.getText().toString()); list.add(item); adapter.notifyDataSetChanged(); } catch (NullPointerException e) { Log.i("[Dynamic Items]", "Tried to add null value"); } } }; } } Java代码: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ListView android:id="@+id/android:list" android:layout_width="fill_parent" android:layout_height="0px" android:layout_weight="1" android:cacheColorHint="#00000000"> </ListView> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="6px" android:layout_marginBottom="8px" android:layout_marginLeft="8px" android:layout_marginRight="8px" android:background="#00000000"> <ImageButton android:id="@+id/button" android:layout_width="100px" android:layout_height="100px" android:src="@android:drawable/ic_menu_add" /> </LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="230px" android:layout_height="wrap_content" android:layout_marginTop="8px" android:layout_marginBottom="8px" android:layout_marginLeft="0px" android:layout_marginRight="28px" android:background="#cccccc00" > <EditText android:id="@+id/new_value_field" android:textColor="#020905" android:textSize="18sp" android:layout_marginTop="6px" android:layout_marginBottom="8px" android:layout_marginLeft="12px" android:layout_marginRight="12px" android:layout_width="210px" android:layout_height="wrap_content" android:layout_weight="1"/> </LinearLayout> </LinearLayout> ROw: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#00000000"> <TextView android:id="@+id/list_value" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout> |
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