Android TextView Marqee

Question

我正在尝试创建一个显示标题的魔镜应用程序。我成功地抓住了RSS的头条新闻，并将3个顶级标题混合成了字符串。当我将文本添加到选框时，它只显示最后一个标题。

标题字符串示例：

US election: Trump 'encourages Russia to hack Clinton emails' | France church attack: Killers 'pledged allegiance to IS' in video | UN condemns 'barbaric' Boko Haram violence in Nigeria

布局的一部分

        <TextView
    android:id="@+id/news_headline"
    style="@style/MirrorListText"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    android:singleLine="true"
    android:visibility="gone"
    android:textSize="@dimen/mirror_cur_event_text_size"
    tools:text=""
        tools:visiblity="visible" />

设置textview的功能 编辑添加了整个功能

private NewsModule.NewsListener mNewsListener = new NewsModule.NewsListener() {
        @Override
        public void onNewNews(String headline) {
            if (TextUtils.isEmpty(headline)) {
                mNewsHeadline.setVisibility(View.INVISIBLE);
            } else {
                mNewsHeadline.setVisibility(View.VISIBLE);
                Log.d("NEWSMODULE", headline);
                mNewsHeadline.setText(headline);
                mNewsHeadline.setSelected(true);
            }
        }
    };

编辑：添加了拉RSS的类

public class NewsModule {
    public interface NewsListener {
        void onNewNews(String headline);
    }

    public static void getNewsHeadline(final NewsListener newsListener) {
        new AsyncTask<Void, Void, String>() {
            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                newsListener.onNewNews(s);
            }

            @Override
            protected String doInBackground(Void... params) {
                RSSReader rssReader = new RSSReader();
                String url = "http://feeds.bbci.co.uk/news/world/rss.xml?edition=us";
                try {
                    RSSFeed feed = rssReader.load(url);
                    Log.d("NEWSMODULE", "successful load");

                    String headlines = feed.getItems().get(0).getTitle();// + feed.getItems().get(1).getTitle() + feed.getItems().get(2).getTitle();
                    Log.d("NEWSMODULE",headlines);
                    return headlines;
                } catch (RSSReaderException e) {
                    Log.d("NEWSMODULE", "Error parsing RSS");
                    return null;
                } catch (Exception e) {
                    // not great to catch general exceptions, but this lib is being sketchy
                    Log.d("NEWSMODULE", "Error parsing RSS");
                    return null;
                }
            }
        }.execute();
    }
}

我知道我已成功将完整的字符串传递给该函数，但唯一的标题出现并且四处移动

"UN condemns 'barbaric' Boko Haram violence in Nigeria"

Answer 1

TextView的重力不正确。我放android:gravity="left"之后 作为其中一个属性，内部工作就像一个魅力。