问题描述
保护无效的onCreate(捆绑savedInstanceState){
// TODO自动生成方法存根
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main); preferences = getShared preferences(FAVORI,0); ListView控件favlist =(ListView控件)findViewById(R.id.favoriliste); ArrayList的<串GT;富=新的ArrayList<串GT;();
的String []巴= foo.toArray(新的String [0]); 公共无效favekle(字符串字符串){ foo.add(字符串);
巴= foo.toArray(新的String [0]); favadapter =新MyFavAdapter(Diziler.this,
android.R.layout.simple_list_item_1,R.id.txtTitle,吧);
// favlist =新的ArrayList<>();
favlist.setAdapter(favadapter);
favadapter.notifyDataSetChanged();}
favadapter =新MyFavAdapter(Diziler.this,
android.R.layout.simple_list_item_1,R.id.txtTitle,吧);
// favlist =新的ArrayList<>();
favlist.setAdapter(favadapter);
favadapter.notifyDataSetChanged();
Hello.I需要help.I要保存列表视图动态添加的项目与共享preferences。
我添加列表视图项与公共无效favekle function.I'm项目添加到ArrayList的<>比我转换的ArrayList<>到字符串数组最后我设置项目适配器。
如果我重新启动应用程序的列表视图我的物品消失。
我如何保存与共享preferences添加的项目?我用的StringBuilder但它没有work.Thank你。
您可以存储字符串集共享preferences,然后将其转换回一个列表,当你找回它们。
的ArrayList<串GT;名单=新的ArrayList<串GT;();
list.add(测试1);
list.add(测试2);preferenceManager.getDefaultShared preferences(上下文)
。编辑()
.putStringSet(stringset,新的HashSet<串GT;(列表))
。承诺();
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
preferences = getSharedPreferences(FAVORI, 0);
ListView favlist = (ListView) findViewById(R.id.favoriliste);
ArrayList<String> foo = new ArrayList<String>();
String [] bar = foo.toArray(new String[0]);
public void favekle(String string) {
foo.add(string);
bar = foo.toArray(new String[0]);
favadapter = new MyFavAdapter(Diziler.this,
android.R.layout.simple_list_item_1, R.id.txtTitle, bar);
// favlist= new ArrayList<>();
favlist.setAdapter(favadapter);
favadapter.notifyDataSetChanged();
}
favadapter = new MyFavAdapter(Diziler.this,
android.R.layout.simple_list_item_1, R.id.txtTitle, bar);
// favlist= new ArrayList<>();
favlist.setAdapter(favadapter);
favadapter.notifyDataSetChanged();
Hello.I need help.I want save dynamically added items in Listview with SharedPreferences.I'm adding listview items with public void favekle function.I'm adding items to ArrayList<> than i convert ArrayList<> to string array finally i set items to adapter.If i restart application my listview items disappear.How can i save added items with sharedpreferences?I used StringBuilder but it didn't work.Thank you.
You can store string sets in Shared Preferences, then convert them back to a List when you retrieve them.
ArrayList<String> list = new ArrayList<String>();
list.add("test1");
list.add("test2");
PreferenceManager.getDefaultSharedPreferences(context)
.edit()
.putStringSet("stringset", new HashSet<String>(list))
.commit();
这篇关于如何保存在列表视图动态添加的项目与共享preferences?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!