在Android中更新应用程序小部件的多个实例

试图创建应用程序小部件的多个实例并分别更新每个实例，但找不到它不能正常工作的原因。以下是代码，从中收集并稍作修改：

package com.example.widgetagain;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

public class MyWidgetProvider extends AppWidgetProvider {
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {

        for (int appWidSingle = 0; appWidSingle < appWidgetIds.length; appWidSingle++) {
            // initializing widget layout
            RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                    R.layout.widget_main);

            // register for button event
            remoteViews.setOnClickPendingIntent(R.id.sync_button,
                    buildButtonPendingIntent(context, appWidSingle));

            // updating view with initial data
            remoteViews.setTextViewText(R.id.title, getTitle());
            remoteViews.setTextViewText(R.id.desc, getDesc());

            // request for widget update
            pushWidgetUpdate(context, remoteViews, appWidSingle);
        }

    }

    public static PendingIntent buildButtonPendingIntent(Context context, int appWidgetSingleId) {
        ++MyWidgetIntentReceiver.clickCount;

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        clickIntent.setAction("WidgetUtils.WIDGET_UPDATE_ACTION");
        return PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        // initiate widget update request
        /*Intent intent = new Intent();
        intent.setAction("WidgetUtils.WIDGET_UPDATE_ACTION");
        return PendingIntent.getBroadcast(context, 0, intent,
                PendingIntent.FLAG_UPDATE_CURRENT);*/
    }

    private static CharSequence getDesc() {
        return "Sync to see some of our funniest joke collections";
    }

    private static CharSequence getTitle() {
        return "Funny Jokes";
    }

    public static void pushWidgetUpdate(Context context, RemoteViews remoteViews, int appWidgetSingleId) {

        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_main);

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        views.setOnClickPendingIntent(R.id.sync_button, pendingIntent);
        manager.updateAppWidget(appWidgetSingleId, views);
    }
}  

---

根据您发布的内容，似乎：

// request for widget update
pushWidgetUpdate(context, remoteViews, appWidSingle);

应该是这样的：

// request for widget update
pushWidgetUpdate(context, remoteViews, appWidgetIds[appWidSingle]);

同样地：

// register for button event
remoteViews.setOnClickPendingIntent(R.id.sync_button,
    buildButtonPendingIntent(context, appWidSingle));

应该是：

// register for button event
remoteViews.setOnClickPendingIntent(R.id.sync_button,
    buildButtonPendingIntent(context, appWidgetIds[appWidSingle]));

---

根据您发布的内容，似乎：

// request for widget update
pushWidgetUpdate(context, remoteViews, appWidSingle);

应该是这样的：

// request for widget update
pushWidgetUpdate(context, remoteViews, appWidgetIds[appWidSingle]);

同样地：

// register for button event
remoteViews.setOnClickPendingIntent(R.id.sync_button,
    buildButtonPendingIntent(context, appWidSingle));

应该是：

// register for button event
remoteViews.setOnClickPendingIntent(R.id.sync_button,
    buildButtonPendingIntent(context, appWidgetIds[appWidSingle]));

---

除了j_um提到的错误之外，这部分代码也不正确：

public static void pushWidgetUpdate(Context context, RemoteViews remoteViews, int appWidgetSingleId) {

        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_main);

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        views.setOnClickPendingIntent(R.id.sync_button, pendingIntent);
        manager.updateAppWidget(appWidgetSingleId, views);
    }

i、 e每次都在创建新的remoteview，而不是在pushwidgetupdate方法中使用传递的remoteview。因此，上述代码更改为：

public static void pushWidgetUpdate(Context context, RemoteViews remoteViews, int appWidgetSingleId) {

        AppWidgetManager manager = AppWidgetManager.getInstance(context);

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        remoteViews.setOnClickPendingIntent(R.id.sync_button, pendingIntent);
        manager.updateAppWidget(appWidgetSingleId, views);
    }

---

除了j_um提到的错误之外，这部分代码也不正确：

public static void pushWidgetUpdate(Context context, RemoteViews remoteViews, int appWidgetSingleId) {

        AppWidgetManager manager = AppWidgetManager.getInstance(context);
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_main);

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        views.setOnClickPendingIntent(R.id.sync_button, pendingIntent);
        manager.updateAppWidget(appWidgetSingleId, views);
    }

i、 e每次都在创建新的remoteview，而不是在pushwidgetupdate方法中使用传递的remoteview。因此，上述代码更改为：

public static void pushWidgetUpdate(Context context, RemoteViews remoteViews, int appWidgetSingleId) {

        AppWidgetManager manager = AppWidgetManager.getInstance(context);

        Intent clickIntent = new Intent(context, MyWidgetIntentReceiver.class);
        clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetSingleId);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, appWidgetSingleId, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

        remoteViews.setOnClickPendingIntent(R.id.sync_button, pendingIntent);
        manager.updateAppWidget(appWidgetSingleId, views);
    }

---

是否至少更新了一个实例？否，原始代码更新。在我改变之后，甚至一个都没有。仅创建具有背景和按钮的小部件，并更新至少一个实例？否，原始代码更新。在我改变之后，甚至一个都没有。仅创建具有背景和按钮的小部件我还建议将变量appWidSingle重命名为类似index的名称，以明确它只是一个索引，而不是实际的小部件id。是的，你是对的，而且我还必须纠正我答案中的另一个错误。谢谢：我还建议将变量appWidSingle重命名为类似index的名称，以明确它只是一个索引，而不是实际的小部件id。是的，你是对的，而且我还必须纠正我答案中的另一个错误。谢谢：