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小部件中的ListView在滚动和调整大小时随机添加项目（嵌套的remoteviews）

debugcn 发表于 Dev
9
油

更新：我用更少的代码创建了一个存储库，以使其更易于理解。

我正在尝试创建一个小部件。我像这里描述的那样做到了：https : //stackoverflow.com/a/6093753/2180161

它部分起作用，但是我有一个非常奇怪的错误。我进行了截屏，所以更容易理解我的意思：http : //c.maysi.de/c6H9

屏幕截图：在此处输入图片说明

As you can see there are some items which were added randomly. (RemoteViews which were added to another RemoteViews object) The same happens when I resize the widget.

The things I printed out in the log are like expected. there is no wrong data. Also there are no new log entries when I scroll.

This is my code:

RemoteViewsFactory:

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MyWidgetViewsFactory implements RemoteViewsService.RemoteViewsFactory {
    private static ArrayList<Item> items = new ArrayList<>();
    private static int itemnr = 0;
    private static int subitemnr = 0;
    private int appWidgetId;
    private Context context;

    public MyWidgetViewsFactory(Context context, Intent intent) {
        this.context = context;
        appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);


        //Some random data to display
        for (int i = 0; i < 10; i++) {
            Item item = new Item(String.valueOf(itemnr++));

            for (int j = 0; j < 3; j++) {
                String[] subitem = {String.valueOf(subitemnr++), String.valueOf(subitemnr++), String.valueOf(subitemnr++)};
                item.addSubitem(subitem);
            }

            items.add(item);
        }
    }

    @Override
    public void onCreate() {
        // no-op
    }

    @Override
    public void onDestroy() {
        // no-op
    }

    @Override
    public int getCount() {
        return items.size();
    }

    @Override
    public RemoteViews getViewAt(int position) {
        Log.d("MyWidgetViewsFactory", "getViewAt(" + position + "):" + items.get(position));
        Item item = items.get(position);

        RemoteViews itemView = new RemoteViews(context.getPackageName(), R.layout.widget_listview_item);

        itemView.setTextViewText(R.id.textView_itemnr, item.getItemNr());

        for (String[] s : item.getSubitems()) {
            Log.d("MyWidgetViewsFactory", "subitem:" + s[0] + "|" + s[1] + "|" + s[2]);
            RemoteViews subitem = new RemoteViews(context.getPackageName(), R.layout.widget_listview_subitem);

            subitem.setTextViewText(R.id.textView_1, s[0]);
            subitem.setTextViewText(R.id.textView_2, s[1]);
            subitem.setTextViewText(R.id.textView_3, s[2]);

            itemView.addView(R.id.linearLayout_item_body, subitem);
        }
        return itemView;
    }

    @Override
    public RemoteViews getLoadingView() {
        return (null);
    }

    @Override
    public int getViewTypeCount() {
        return (1);
    }

    @Override
    public long getItemId(int position) {
        return (position);
    }

    @Override
    public boolean hasStableIds() {
        return (true);
    }

    @Override
    public void onDataSetChanged() {
        // no-op
    }

    class Item {
        private ArrayList<String[]> subitems = new ArrayList<>();
        private String itemnr = "";

        Item(String itemnr) {
            this.itemnr = itemnr;
        }

        Item() {
        }

        public void addSubitem(String[] subitem) {
            this.subitems.add(subitem);
        }

        public ArrayList<String[]> getSubitems() {
            return subitems;
        }

        public String getItemNr() {
            return itemnr;
        }

        public void setItemNr(String itemnr) {
            this.itemnr = itemnr;
        }
    }
}

AppWidgetProvider

    public class MyWidgetProvider extends AppWidgetProvider {

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        // There may be multiple widgets active, so update all of them
        Log.d("MyWidgetProvider", "appWidgetIds.lenght:" + appWidgetIds.length);
        for (int appWidgetId : appWidgetIds) {
            Intent svcIntent = new Intent(context, MyWidgetService.class);
            svcIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);

            RemoteViews widget = new RemoteViews(context.getPackageName(), R.layout.widget_root);

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH)
                widget.setRemoteAdapter(R.id.listView_widget, svcIntent);
            else
                widget.setRemoteAdapter(appWidgetId, R.id.listView_widget, svcIntent);

            /*
            Intent clickIntent = new Intent(context, MainActivity.class);
            PendingIntent clickPI = PendingIntent.getActivity(context, 0, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            widget.setPendingIntentTemplate(R.id.listView_widget, clickPI);*/

            appWidgetManager.updateAppWidget(appWidgetId, widget);
        }
    }

    @Override
    public void onEnabled(Context context) {
        // Enter relevant functionality for when the first widget is created
    }

    @Override
    public void onDisabled(Context context) {
        // Enter relevant functionality for when the last widget is disabled
    }
}

RemoteViewsService

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class MyWidgetService extends RemoteViewsService {
    @Override
    public RemoteViewsFactory onGetViewFactory(Intent intent) {
        return (new MyWidgetViewsFactory(this.getApplicationContext(), intent));
    }
}

all other resources can you find in the repo at GitHub.

Logcat output:

08-08 02:11:10.858  32427-32444/? D/MyWidgetViewsFactory﹕ getViewAt(0):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@3e7179c9
08-08 02:11:10.860  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:0|1|2
08-08 02:11:10.864  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:3|4|5
08-08 02:11:10.866  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:6|7|8
08-08 02:11:10.927  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(0):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@3e7179c9
08-08 02:11:10.927  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:0|1|2
08-08 02:11:10.927  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:3|4|5
08-08 02:11:10.927  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:6|7|8
08-08 02:11:10.931  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(1):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@23e248ce
08-08 02:11:10.931  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:9|10|11
08-08 02:11:10.931  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:12|13|14
08-08 02:11:10.931  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:15|16|17
08-08 02:11:10.933  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(2):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@16dbf3ef
08-08 02:11:10.933  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:18|19|20
08-08 02:11:10.933  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:21|22|23
08-08 02:11:10.933  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:24|25|26
08-08 02:11:10.936  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(3):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@19d3defc
08-08 02:11:10.936  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:27|28|29
08-08 02:11:10.936  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:30|31|32
08-08 02:11:10.936  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:33|34|35
08-08 02:11:10.938  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(4):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@ee985
08-08 02:11:10.938  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:36|37|38
08-08 02:11:10.938  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:39|40|41
08-08 02:11:10.938  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:42|43|44
08-08 02:11:10.941  32427-32443/? D/MyWidgetViewsFactory﹕ getViewAt(8):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@335e23da
08-08 02:11:10.941  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:72|73|74
08-08 02:11:10.941  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:75|76|77
08-08 02:11:10.941  32427-32443/? D/MyWidgetViewsFactory﹕ subitem:78|79|80
08-08 02:11:10.943  32427-32447/? D/MyWidgetViewsFactory﹕ getViewAt(9):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@229de00b
08-08 02:11:10.943  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:81|82|83
08-08 02:11:10.943  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:84|85|86
08-08 02:11:10.943  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:87|88|89
08-08 02:11:10.945  32427-32444/? D/MyWidgetViewsFactory﹕ getViewAt(5):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@2afdeee8
08-08 02:11:10.945  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:45|46|47
08-08 02:11:10.945  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:48|49|50
08-08 02:11:10.945  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:51|52|53
08-08 02:11:10.948  32427-32444/? D/MyWidgetViewsFactory﹕ getViewAt(7):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@1c599901
08-08 02:11:10.948  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:63|64|65
08-08 02:11:10.948  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:66|67|68
08-08 02:11:10.948  32427-32444/? D/MyWidgetViewsFactory﹕ subitem:69|70|71
08-08 02:11:10.951  32427-32447/? D/MyWidgetViewsFactory﹕ getViewAt(6):de.mayerhofersimon.listviewproblem.MyWidgetViewsFactory$Item@368aa3a6
08-08 02:11:10.951  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:54|55|56
08-08 02:11:10.951  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:57|58|59
08-08 02:11:10.951  32427-32447/? D/MyWidgetViewsFactory﹕ subitem:60|61|62

So the data gets passed correct. it just doesn't get correct displayed...

BTW: this is what it should look like: http://c.maysi.de/cB8K

Could it be, that the problem is because of nested remoteviews? because all the outer remoteviews are displayed correct...

maysi

I found the answer myself.

要解决在滚动和调整大小时添加奇怪的视图的问题，您必须调用removeAllViews添加了子视图的布局：

@Override
    public RemoteViews getViewAt(int position) {
        ...
        RemoteViews itemView = new RemoteViews(context.getPackageName(), R.layout.widget_listview_item);
        itemView.removeAllViews(R.id.linearLayout_item_body);
        ...
        return itemView;
    }

而视图不显示的原因是由于颜色：添加后 

    subitem.setTextColor(R.id.textView_1, context.getResources().getColor(R.color.abc_primary_text_material_light));
    subitem.setTextColor(R.id.textView_2, context.getResources().getColor(R.color.abc_primary_text_material_light));
    subitem.setTextColor(R.id.textView_3, context.getResources().getColor(R.color.abc_primary_text_material_light));

显示所有视图：

在此处输入图片说明

本文收集自互联网，转载请注明来源。

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