src/com/android/launcher3/AppWidgetsRestoredReceiver.java


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package com.android.launcher3;

import static com.android.launcher3.LauncherPrefs.APP_WIDGET_IDS;
import static com.android.launcher3.LauncherPrefs.OLD_APP_WIDGET_IDS;

import android.appwidget.AppWidgetManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import com.android.launcher3.util.IntArray;
import com.android.launcher3.widget.LauncherWidgetHolder;

public class AppWidgetsRestoredReceiver extends BroadcastReceiver {

    private static final String TAG = "AppWidgetsRestoredReceiver";

    @Override
    public void onReceive(final Context context, Intent intent) {
        if (AppWidgetManager.ACTION_APPWIDGET_HOST_RESTORED.equals(intent.getAction())) {
            int hostId = intent.getIntExtra(AppWidgetManager.EXTRA_HOST_ID, 0);
            Log.d(TAG, "Widget ID map received for host:" + hostId);
            if (hostId != LauncherWidgetHolder.APPWIDGET_HOST_ID) {
                return;
            }

            final int[] oldIds = intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_OLD_IDS);
            final int[] newIds = intent.getIntArrayExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS);
            if (oldIds != null && newIds != null && oldIds.length == newIds.length) {
                LauncherPrefs.get(context).putSync(
                        OLD_APP_WIDGET_IDS.to(IntArray.wrap(oldIds).toConcatString()),
                        APP_WIDGET_IDS.to(IntArray.wrap(newIds).toConcatString()));
            } else {
                Log.e(TAG, "Invalid host restored received");
            }
        }
    }
}