Question

我的Android应用中定义了一个小部件，该小部件映射到由配置Activity选择的特定lightswitch。窗口小部件的每个实例都可以映射到不同的灯光开关，并点击窗口小部件可以打开和关闭灯光。以下是设置窗口小部件的活动代码：

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() != R.id.action_choose) {
        return super.onOptionsItemSelected(item);
    RemoteViews remoteViews = new RemoteViews(this.getPackageName(), R.layout.device_widget);
    remoteViews.setImageViewResource(R.id.widgetOnOffButton, android.R.drawable.star_big_off);

    SharedPreferences.Editor prefs = getApplicationContext().getSharedPreferences(MyWidgetService.WIDGET_PREFS, MODE_PRIVATE).edit();
    prefs.putInt(MyWidgetService.WIDGET_DEVICE_ID + Integer.toString(mAppWidgetId), mDeviceId);
    prefs.apply();

    Intent clickIntent = new Intent(this.getApplicationContext(), MyWidgetProvider.class);
    clickIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
    clickIntent.putExtra(MyWidgetService.ON_LEVEL, 100);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.widgetOnOffButton, pendingIntent);

    mAppWidgetManager.updateAppWidget(mAppWidgetId, remoteViews);
}

我已经验证了mAppWidgetId是小部件的新ID。这是我的AppWidgetProvider的代码，我使用onReceive方法，所以我可以访问Intent中的额外内容，但我为任何超出正常点击条件的Intent定义了onUpdate和onDelete：

@Override
public void onReceive(Context context, Intent intent) {

    String action = intent.getAction();
    int widgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
    int onLevel = intent.getIntExtra(MyWidgetService.ON_LEVEL, -1);

    if(action == AppWidgetManager.ACTION_APPWIDGET_UPDATE && widgetId > -1 && onLevel > -1) {

        Intent newIntent = new Intent(context.getApplicationContext(), WishFullWidgetService.class);
        newIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
        newIntent.putExtra(MyWidgetService.ON_LEVEL, onLevel);
        context.startService(newIntent);
    }
    super.onReceive(context, intent);

    Intent resultValue = new Intent();
    resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
    setResult(RESULT_OK, resultValue);
    finish();

    return true;
}

这是来自MyWidgetService的代码。每次单击窗口小部件时，我都会使用自己的WidgetId和OnLevel重置其OnClickPendingIntent，但是所有窗口小部件都会使用最新窗口小部件的ID和OnLevel激活PendingIntent。

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this.getApplicationContext());
    int widgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
    int onLevel = intent.getIntExtra(ON_LEVEL, -1);

    RemoteViews remoteViews = new RemoteViews(this.getApplicationContext().getPackageName(), R.layout.device_widget);
    Intent clickIntent = new Intent(this.getApplicationContext(), WishFullWidgetProvider.class);
    clickIntent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
    clickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);

    if(onLevel > 0) {
        remoteViews.setImageViewResource(R.id.widgetOnOffButton, android.R.drawable.star_big_on);
        clickIntent.putExtra(ON_LEVEL, 0);
    } else {
        remoteViews.setImageViewResource(R.id.widgetOnOffButton, android.R.drawable.star_big_off);
        clickIntent.putExtra(ON_LEVEL, 100);
    }

    if(onLevel > -1) {
        int deviceId = mPrefs.getInt(WIDGET_DEVICE_ID + Integer.toString(widgetId), -1);
        sendMessageToDevice(onLevel, deviceId);
    }

    PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    remoteViews.setOnClickPendingIntent(R.id.widgetOnOffButton, pendingIntent);
    appWidgetManager.updateAppWidget(widgetId, remoteViews);

    stopSelf();
    return super.onStartCommand(intent, flags, startId);
}

此时，如果我有Widget 1和Widget 2，单击Widget 1将触发包含Widget 2的ID和OnLevel的Intent。如何在不最新的部件覆盖其他部件的情况下独立更新每个部件的OnClickPendingIntent？

Answer 1

传递一个唯一的int作为pendingIntent的第一个标志（第二个参数），最好是widgetID。

PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), uniqueID, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT);

这将导致android不覆盖现有的pendingIntent，但会创建一个新的。

这是针对具有类似问题的不同帖子的link。

为什么AppWidgetManager更新Widget的所有RemoteView的Intent？

1 个答案: