Question

我是Android开发的新手。我正在尝试为我的应用程序创建一个包含listview的小部件，每个listview除了标题和内容之外还有2个按钮。

当我按下该元素的按钮时，我试图在app小部件（主屏幕）中隐藏listitem的相应元素。

首先，我尝试检查按钮点击是否得到任何响应，如果我能检测到我是否可以获得该项目的位置。所以我这样做了：

listprovider.java（实现remoteviewfactory）：

@Override
    public RemoteViews getViewAt(int position) {
        final RemoteViews remoteView = new RemoteViews(
                context.getPackageName(), R.layout.list_row);
        ListItem listItem = listItemList.get(position);
        remoteView.setTextViewText(R.id.heading, listItem.heading);
        remoteView.setTextViewText(R.id.content, listItem.content);

        Bundle extras = new Bundle();
        extras.putInt(WidgetProvider.EXTRA_ITEM, position);
        Intent fillInIntent = new Intent();
        fillInIntent.putExtras(extras);
        // Make it possible to distinguish the individual on-click
        // action of a given item
        remoteView.setOnClickFillInIntent(R.id.buttonwidget, fillInIntent);

        return remoteView;
    }

然后在 WidgetProvider.java（扩展AppWidgetProvider）：

for (int i = 0; i < N; ++i) {
            RemoteViews remoteViews = updateWidgetListView(context,
                    appWidgetIds[i]);
            Intent clickIntent = new Intent(context, MainActivity.class);
            clickIntent.setAction(WidgetProvider.TOAST_ACTION);
            clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]);
            clickIntent.setData(Uri.parse(clickIntent.toUri(Intent.URI_INTENT_SCHEME)));
            PendingIntent clickPI = PendingIntent.getActivity(context, 0,
                    clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

            remoteViews.setPendingIntentTemplate(com.example.markup.R.id.listViewWidget, clickPI);
            appWidgetManager.updateAppWidget(appWidgetIds[i], remoteViews);
        }
        super.onUpdate(context, appWidgetManager, appWidgetIds);

mainActivity.java 是该程序的默认活动，我这样做是为了获取项目位置：

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Printing detail of clicked item from widget
        Intent intent = getIntent();
        if (intent.getAction().equals(WidgetProvider.TOAST_ACTION)) {
            int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);
            int viewIndex = intent.getIntExtra(WidgetProvider.EXTRA_ITEM, 0);
            Toast.makeText(getApplicationContext(), "Touched view " + viewIndex, Toast.LENGTH_SHORT).show();
        }else{
            Toast.makeText(getApplicationContext(), "Touched view none ", Toast.LENGTH_SHORT).show();
        }
    }

因此我可以通过点击按钮打开主要活动并在底部获取TOAST文本，从而得到准确的结果。

但我希望在点击时隐藏/禁用app小部件的相应元素。我该怎么做？

Answer 1

you must remove list item from the adapter when the button is pressed. And call

adapter.notifyDataSetChanged();

then the item will disappear. Hopes this can help.

Android应用小部件listview onclick监听器

1 个答案: