我正在尝试在我的Android应用程序中的SaveInstanceState中存储2个String ArrayLists和1个Spanned ArrayList。这可能吗?如果是这样,你能提供一个例子吗?
ArrayListList<String> businessNames = new ArrayList<String>();
List<Spanned> businessInfo = new ArrayList<Spanned>();
ArrayList<String> businessCategories = new ArrayList<String>();
protected void onSaveInstanceState(Bundle bundle) {
super.onSaveInstanceState(bundle);
bundle.putStringArrayList("businessNames", businessNames);
bundle.putStringArrayList("businessCategories", businessCategories);
// ??????
bundle.putParcelableArrayList("businessInfo", businessInfo);
}
答案 0 :(得分:-1)
我自己解决了这个问题。这是下面的代码......
ArrayList<String> businessNames = new ArrayList<String>();
List<Spanned> businessInfo = new ArrayList<Spanned>();
ArrayList<String> businessCategories = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expListView = (ExpandableListView) findViewById(R.id.lvExp);
String userChoice = (String) getIntent().getExtras().get("userChoice");
if (savedInstanceState != null){
businessInfo = (List<Spanned>) savedInstanceState.getSerializable("businessInfo");
businessNames = savedInstanceState.getStringArrayList("businessNames");
businessCategories = savedInstanceState.getStringArrayList("businessCategories");
new DisplaySavedResults().execute();
} else {
new RetreiveSearchResults().execute(userChoice);
}
}
protected void onSaveInstanceState(Bundle savedInstanceState) {
super.onSaveInstanceState(savedInstanceState);
savedInstanceState.putStringArrayList("businessNames", businessNames);
savedInstanceState.putStringArrayList("businessCategories", businessCategories);
savedInstanceState.putSerializable("businessInfo", (Serializable) businessInfo);
}
新的asynctask DisplaySavedResults
只是在onPostExecute
中改变了UI。 doInBackground
留空。