android - 如何在小部件中循环文本？

Question

我是 android 的新手，我正在尝试创建一个新闻小部件，显示标题和摘要 30 秒。然后更改为另一个标题和摘要。我希望小部件连续循环执行此操作。到目前为止，我只能显示第一个标题和 fragment 。如何在不每 30 秒调用 alarmManager 的情况下更改文本？非常感谢任何帮助。

我的代码

public static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {



    RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.widget1);


    String tickerheadline="testing";
    String tickerstory="testing";
    for (int i = 0; i < RssReader.rssheadline.size(); i++) {
        tickerheadline = RssReader.rssheadline.get(RssReader.rssheadline.size()-(i+1));
        tickerstory = RssReader.rssstory.get(RssReader.rssheadline.size()-(i+1));
        Handler handler = new Handler(); 
        handler.postDelayed(new Runnable() { 
             public void run() {} 
            }, 30000);

    }

    updateViews.setTextViewText(R.id.headline, tickerheadline );
    updateViews.setTextViewText(R.id.story, tickerstory );

    appWidgetManager.updateAppWidget(appWidgetId, updateViews);
} 

编辑

public static void updateAppWidget(final Context context, final AppWidgetManager appWidgetManager, final int appWidgetId) {
    final RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.widget1);

new Thread(new Runnable() {
        public void run() {     
    tickerheadline="testing";
    tickerstory="testing";
    for (int i = 0; i < RssReader.rssheadline.size(); i++) {
        tickerheadline = RssReader.rssheadline.get(RssReader.rssheadline.size()-(i+1));
        tickerstory = RssReader.rssstory.get(RssReader.rssheadline.size()-(i+1));
        context.runOnUiThread(action); //action cannot be resolved as variable
        SystemClock.sleep(30000);

    }
        }
    }).start();

    Runnable action = new Runnable() {
        public void run() {
    updateViews.setTextViewText(R.id.headline, tickerheadline );
    updateViews.setTextViewText(R.id.story, tickerstory );


    appWidgetManager.updateAppWidget(appWidgetId, updateViews);
        }
    };

} }

Answer 1

无论您在方法中传递什么参数，您都可以创建类的构造函数并将其传递，并将“MainActivity.this”替换为“context”。不过，如果您有任何疑问，请告诉我...:)

public void updateAppWidget(){
    new YourNewClass().start();
}
private class YourNewClass extends Thread {
    @Override
    public void run() {
        for(--,--,--){
            MainActivity.this.runOnUiThread(runnable);
            SystemClock.sleep(30000);
        }
    }
}
private Runnable  runnable = new Runnable() {
    public void run() {

    }
};