如何在小部件的列表视图中以编程方式为项目设置背景颜色？

Question

我按照github上的示例代码做了一个Widget：LoremWidget。

我想为每个项目设置不同的背景颜色（不是随机的）。 我想在该行下方设置背景颜色：

row.setTextViewText(R.id.widget_row_title, items[position].title)
// I want to do something similar like:
// row.findViewById<LinearLayout>(R.id.widget_row_root).setBackgroundColor = ...

我要设置的颜色是"#e57373"这样的字符串形式

----编辑----

为了更好地理解问题，在数据提供者类中为小部件设置背景颜色没有这样的方法：

public class LoremViewsFactory implements RemoteViewsService.RemoteViewsFactory {
    @Override
    public RemoteViews getViewAt(int position) {
        // no method available for setting background color

Answer 1

请检查这个更新的答案：-

在定义主要小部件布局的布局中，我必须添加以下内容：android:id="@+id/LineaRLayout1"

然后在 AppWidgetProvider 中，onUpdate 最终看起来像这样，我在这里真正展示的是我如何更改颜色

只需将项目的 ID 替换为您的项目 ID。

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

    Log.d(LOG_TAG, "Updating Example Widgets.");

    // Perform this loop procedure for each App Widget that belongs to this
    // provider
    for (int i = 0; i < N; i++) {
        int appWidgetId = appWidgetIds[i];

        // Create an Intent to launch ExampleActivity
        Intent intent = new Intent(context, WidgetActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

        // Get the layout for the App Widget and attach an on-click listener
        // to the button
        RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.activity_main);

        //try change color here with no luck, I tried activity_main,background, widget1

        views.setInt(R.id.LineaRLayout1, "setBackgroundColor", Color.GREEN);
        views.setOnClickPendingIntent(R.id.button, pendingIntent);
        // Tell the AppWidgetManager to perform an update on the current app
        // widget
        appWidgetManager.updateAppWidget(appWidgetId, views);

Answer 2

我在onUpdate 方法中这样做

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

if(/*condition for changing background colour is met*/){
    remoteViews.setInt(R.id.widget_row_title, "setBackgroundColor", R.color.new_colour);
}else{
    remoteViews.setInt(R.id.widget_row_title, "setBackgroundColor", R.color.default_colour);
}