Question

使用this教程我创建了一个带按钮的小部件。在下面的代码中，当我点击ButtonP1时，会看到一个toast msg。我也试着用ButtonP2做同样的事情，但只看到一个设置为ButtonP1的toast msg。当用户点击ButtonP2时，我怎么能这样做呢？

    public class HelloWidget extends AppWidgetProvider {

    public static String ACTION_WIDGET_CONFIGURE = "ConfigureWidget";
    public static String ACTION_WIDGET_RECEIVER = "ActionReceiverWidget";

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        context.startService(new Intent(context, UpdateService.class));

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widgetmain);

         Intent active = new Intent(context, HelloWidget.class);
         active.setAction(ACTION_WIDGET_RECEIVER);
         active.putExtra("msg", "Message for Button P1");

         PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, active, 0);
         remoteViews.setOnClickPendingIntent(R.id.ButtonP1, actionPendingIntent);

         Intent active2 = new Intent(context, HelloWidget.class);
         active2.setAction(ACTION_WIDGET_RECEIVER);
         active2.putExtra("msg", "Message for Button P2");

         PendingIntent actionPendingIntent2 = PendingIntent.getBroadcast(context, 0, active2, 0);
         remoteViews.setOnClickPendingIntent(R.id.ButtonP2, actionPendingIntent2);

         appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
   }

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

    final String action = intent.getAction();
    if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) 
    {
        final int appWidgetId = intent.getExtras().getInt(
                AppWidgetManager.EXTRA_APPWIDGET_ID,AppWidgetManager.INVALID_APPWIDGET_ID);
        if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) 
        {
            this.onDeleted(context, new int[] { appWidgetId });
        }
    } 
    else 
    {
        if (intent.getAction().equals(ACTION_WIDGET_RECEIVER)) 
        {
            String msg = "null";
            try {
                msg = intent.getStringExtra("msg");
                } catch (NullPointerException e) {
                Log.e("Error", "msg = null");
                }
                Toast.makeText(context, "Out: " + msg, Toast.LENGTH_SHORT).show();
        }
        super.onReceive(context, intent);
    }
}
}

我试过这个（ACTION_WIDGET_RECEIVER2而不是ACTION_WIDGET_RECEIVER）

Intent active2 = new Intent(context, HelloWidget.class);
     active2.setAction(ACTION_WIDGET_RECEIVER2);
     active2.putExtra("msg", "Message for Button P2");

     PendingIntent actionPendingIntent2 = PendingIntent.getBroadcast(context, 0, active2, 0);
     remoteViews.setOnClickPendingIntent(R.id.ButtonP2, actionPendingIntent2);

与

if (intent.getAction().equals(ACTION_WIDGET_RECEIVER2)) 
                {
                    String msg2 = "null";
                    try {
                        msg2 = intent.getStringExtra("msg2");
                        } catch (NullPointerException e) {
                        Log.e("Error", "msg = null");
                        }
                        Toast.makeText(context, "Out2: " + msg2, Toast.LENGTH_SHORT).show(); //null
                }

在相同的if行之后。在这种情况下，msg2变量为空。

Answer 1

在检索将执行广播的PendingIntent时，您必须使用不同的请求代码。如果不是PendingIntent.getBroadcast(..)将返回您的案例中的现有案件，并使用您的第一个意图中的消息。

private static final int REQUEST_CODE_ONE = 10;
private static final int REQUEST_CODE_TWO = 20;

....

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    ....
    PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, REQUEST_CODE_ONE, active, 0);
    ....

    PendingIntent actionPendingIntent2 = PendingIntent.getBroadcast(context, REQUEST_CODE_TWO, active2, 0);
    ....
}

Android Widget按钮

1 个答案: