Android 更改小部件背景图片

Question

过去两天一直在努力更改我的小部件的背景，基于一些 if 语句(现在删除只是想从类中更改小部件背景)下面是我的来源。不过怎么了，我之前已经更改了图片，例如背景，但无法让它为我的小部件工作，谢谢。顺便说一句，这是我最近的尝试

//Widget Provider Class
public class WidgetProvider extends AppWidgetProvider {

    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        final int N = appWidgetIds.length;

        for (int i=0; i<N; i++) {
            int appWidgetId = appWidgetIds[i];

            Intent intent = new Intent(context, com.widget.WidgetDialog.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

            RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
            views.setOnClickPendingIntent(R.id.widget, pendingIntent);

            appWidgetManager.updateAppWidget(appWidgetId, views);
            views.setImageViewBitmap(R.id.widget, ((BitmapDrawable)context.getResources().getDrawable(R.drawable.widget_background)).getBitmap());

        }
    }
}



//Widget Layout XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button android:id="@+id/widget"
    android:background="#00000000"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    </Button>
</LinearLayout>

Answer 1

这里有一个你可以做的技巧:使用 ImageView 作为你的背景，而不是你 View 的“背景”属性，并将 scaleType 设置为“fitXY”。像这样:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">    

<ImageView
    android:id="@+id/backgroundImage"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:src="@drawable/some_background"
    android:scaleType="fitXY"/>

<RelativeLayout
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="match_parent">       

        <Button
            android:text="some button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

        <!-- all your views -->

</RelativeLayout>

</FrameLayout>

现在您可以在运行时切换 ImageView 源:

//updating current widget
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
RemoteViews views = new RemoteViews(getPackageName(), R.layout.widget_layout);

views.setImageViewResource(R.id.backgroundImage, R.drawable.some_other_background);

appWidgetManager.updateAppWidget(widgetId, views);