我有一個活動,在視圖上繪製一些圖標。我用`notifyDataSetChanged`丟失了什麼?
它在onCreate()
中設置了一個list和listAdapter。
我已經提取公共方法的代碼,將列表分配給我的適配器。
使外部代碼,可以調用UI線程,並指定新的列表到適配器,並使其通知通過notifyDataSetChange()
的變化。然而,新的圖標中沒有畫出,但只有離開,又回到了後活動。
我該如何解決這個問題?
我已經試過adapter.clear()
了一倍檢查UI線程中運行該代碼。
還有什麼?
public class CategoriesActivity extends ActivityBase {
private Category[] categories;
SettingValueAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_values);
((TitleBar)findViewById(R.id.theTitleBar)).init(this,DisplayStrings.DS_CATEGORIES);
adapter = new SettingValueAdapter(this);
DriveToNativeManager nativeManager = DriveToNativeManager.getInstance();
nativeManager.getCategories(new CategoriesListener() {
@Override
public void onComplete(Category[] aCategories) {
categories = aCategories;
refreshListIcons();
}
});
final ListView list = (ListView)findViewById(R.id.settingsValueList);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
..
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
..
}
public void refreshListIcons() {
NativeManager nativeManager = AppService.getNativeManager();
SettingsValue[] values = new SettingsValue[categories.length];
for (int i = 0; i < categories.length; i++) {
values[i] = new SettingsValue(categories[i].value, nativeManager.getLanguageString(categories[i].displayString), false);
values[i].icon = ResManager.GetSkinDrawable(categories[i].iconName + ".bin");
}
adapter.setValues(values);
}
}
public class SettingValueAdapter extends BaseAdapter {
private SettingsValue[] values;
private LayoutInflater inflater;
public SettingValueAdapter(Context context) {
inflater = LayoutInflater.from(context);
}
...
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.settings_item, null);
}
SettingsValue item = values[position];
CheckedTextView name = (CheckedTextView) convertView.findViewById(R.id.itemText);
ImageView iconView = (ImageView) convertView.findViewById(R.id.itemIcon);
if (iconView != null && (item != null) && (item.icon != null)) {
iconView.setImageDrawable(item.icon);
iconView.setVisibility(View.VISIBLE);
} else {
iconView.setVisibility(View.GONE);
}
name.setText(item.display);
name.setChecked(item.isSelected);
View container = convertView.findViewById(R.id.itemContainer);
if (position == 0) {
..
return convertView;
}
public void setValues(SettingsValue[] values) {
this.values = values;
notifyDataSetChanged();
}
}
即使你說你確定它在UI線程中,請嘗試在'CategoriesActivity.this'中放置'refreshListIcons()'調用。runOnUiThread()' –
沒有幫助。我努力了。它甚至可能導致崩潰? –
它不應該。編輯你的問題,併發布你如何嘗試它,以及你在logcat中遇到了什麼錯誤。 –