adapter.notifyDataSetChanged();是不是在Android中工作我正在检索for循环中的值,但值不显示在屏幕上。 我的Java文件:NotifyDataSetChanged在我的代码中不起作用
private static final String TAG_NAME="Notification";
String[] resultsAsString = {""};
ListView listView;
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, resultsAsString);
ParseQuery<ParseObject> parseObjectParseQuery=new ParseQuery<ParseObject>("PushNotifications");
parseObjectParseQuery.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> objects, ParseException e) {
if (e==null){
resultsAsString = new String[objects.size()];
Log.d(TAG_NAME,"Objects size in MyService is:"+objects.size());
if(objects.size()>0){
Log.d(TAG_NAME,"Object size is "+objects.size());
for(int index = 0; index < objects.size(); index++){
resultsAsString[index] = objects.get(index).getString("Message");
Log.d(TAG_NAME,"result value is:"+resultsAsString[index]);
}
adapter.notifyDataSetChanged();
}else {
Log.d(TAG_NAME,"Object size is "+objects.size());
}
}
}
});
listView = (ListView) findViewById(R.id.notificatio_listView);
listView.setAdapter(adapter);
我的logcat显示: 对象大小为MyService是:3 对象大小为3 第一Nottification 第二消息 第三则消息
你确定objects.size()是> 0吗? – Opiatefuchs
我确信对象大小是3,我可以查看for循环 –
和...通常,在将适配器设置为listView后调用adapterNotifyDataSetChanged()...... – Opiatefuchs