Question

我正在使用小部件制作应用程序。小部件包含ImageView，当我点击它时，它将改变ImageView中的图像。

但是，当我创建多个实例并单击其中一个实例时，图像会在所有实例中更改

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.content.SharedPreferences;
import android.util.Log;
import android.widget.RemoteViews;

public class MyWidgetProviderSimple extends AppWidgetProvider {

    private static final String ACTION_CLICK = "ACTION_CLICK";
    public static String MY_PREFS_NAME = "MyPrefsFile";

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

        // Get all ids
        ComponentName thisWidget = new ComponentName(context,
                MyWidgetProviderSimple.class);
        int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);

        for (int widgetId : allWidgetIds) {

            updateAppWidget (context, appWidgetManager, widgetId, allWidgetIds);

        }
    }

    private void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int widgetId, int [] allWidgetIds) {

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

        Log.w("-widgetId:", String.valueOf(widgetId));


        if (getWidgetValue(context, widgetId) == -1)
        {
            setWidgetValue(context, widgetId, 0);
        }

        // Set the text to the view with the id R.id.update
        // instead of -1
        remoteViews.setImageViewResource(R.id.widgetImageView, getImageToSet(context, widgetId));

        // Register an onClickListener
        Intent intent = new Intent(context, MyWidgetProviderSimple.class);

        intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, allWidgetIds);

        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.widgetImageView, pendingIntent);

        appWidgetManager.updateAppWidget(widgetId, remoteViews);



    }
    public int getImageToSet(Context context, int widgetId) {
        int value = getWidgetValue (context, widgetId);
        Log.w("-- getImageToSet:", String.valueOf(widgetId));

        if (value == -1) {
            Log.d("-- couldn't find", String.valueOf(widgetId));
            return -1;
        }


        if (value == 5)
        {
            value = 0;
        }

        //TODO: must be replaced by Array list
        int drawables = R.drawable.uui1 + value;

        value++;

        setWidgetValue(context, widgetId, value);

        return drawables;
    }

    public static void setWidgetValue(Context context, int appWidgetId, int value) {

        SharedPreferences.Editor editor = context.getSharedPreferences(MY_PREFS_NAME, Context.MODE_PRIVATE).edit();
        editor.putInt(String.valueOf(appWidgetId), value);
        editor.apply();
    }

    public static int getWidgetValue(Context context, int appWidgetId) {
        SharedPreferences prefs = context.getSharedPreferences(MY_PREFS_NAME, Context.MODE_PRIVATE);


        return prefs.getInt(String.valueOf(appWidgetId), -1);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        super.onReceive(context, intent);

        int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
        if( appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID )
        {
            super.onReceive(context, intent);
        }

    }
}

Answer 1

“方法updateAppWidget（ComponentName提供程序，RemoteViews视图）将RemoteView设置为用于所提供的AppWidget提供程序的所有AppWidget实例。

您想要使用此方法：updateAppWidget（int appWidgetId，RemoteViews视图），它将RemoteView设置为用于指定的appWidgetId。

为此，您需要跟踪小部件的ID“

在这里查看其余的答案： multiple instances of widget with separated working clickable ImageView

仅在一个实例中更改ImageView

1 个答案: