[英]ListView, prevent adding new items
我有我的listview活动,效果很好,但是我有一个烦人的问题。 无论何时恢复,它都会在列表中添加相同的项,并且ist会变大。 我只希望它保持我最初输入的值。 我怎样才能做到这一点? 这是我的活动
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom_list_view);
adapter = new SimpleAdapter(
this,
list,
R.layout.custom_row_view,
new String[] {"pen","price","color"},
new int[] {R.id.text1,R.id.text2, R.id.text3}
);
populateList();
setListAdapter(adapter);
}
这是我的arrayList:
static final ArrayList<LinkedHashMap<String,String>> list =
new ArrayList<LinkedHashMap<String,String>>();
private void populateList() {
LinkedHashMap<String,String> temp = new LinkedHashMap<String,String>();
temp.put("pen"," Mission name");
list.add(temp);
LinkedHashMap<String,String> temp1 = new LinkedHashMap<String,String>();
temp1.put("pen"," Map activity");
list.add(temp1);
LinkedHashMap<String,String> temp2 = new LinkedHashMap<String,String>();
temp2.put("pen"," Check sensors");
list.add(temp2);
LinkedHashMap<String,String> temp3 = new LinkedHashMap<String,String>();
temp3.put("pen"," Infrared Image");
list.add(temp3);
LinkedHashMap<String,String> temp4 = new LinkedHashMap<String,String>();
temp4.put("pen"," Radar Image");
list.add(temp4);
LinkedHashMap<String,String> temp5 = new LinkedHashMap<String,String>();
temp5.put("pen"," Visual image");
list.add(temp5);
LinkedHashMap<String,String> temp6 = new LinkedHashMap<String,String>();
temp6.put("pen"," suscribe to Viewer");
list.add(temp6);
}
不要将列表声明为静态。 即:
final ArrayList<LinkedHashMap<String,String>> list = new ArrayList<LinkedHashMap<String,String>>();
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