滚动textview是不可能的吗? [英] Is scrolling a textview impossible?

问题描述

我为Android制作了一个迷你冒险游戏，用于学习Android编程.但是，包含有关游戏事件信息的textview不会滚动.我已经以编程方式完成了.为什么不滚动?我尝试了所有事情，但我想得出的结论是Android可以做到，但到目前为止，它还只是bug.

I make a mini adventure game for Android to learn Android programming. But my textview which contains information about the game events does not scroll. I have done it programmatically. Why won't it scroll? I tried everything and I want to conclude that Android can do it but so far it just bugs.

我的观点是这样的.

我的代码可从我的存储库中获取.

        textView = new TextView(this);
        textView.setText("You are in a dungeon.");
        textView.setMaxLines(4);

        textView.setMovementMethod(new ScrollingMovementMethod());

...
        tr2.addView(textView);
        TableRow.LayoutParams params = (TableRow.LayoutParams) textView.getLayoutParams();
        params.span = 6; //amount of columns you will span
        textView.setLayoutParams(params);

        tbl.addView(tr2);

更新

2个答案，一些评论，没有任何效果.我尝试了一切.什么都行不通.

2 answers, several comments and nothing works. I tried everything. Nothing works.

推荐答案

这可能是因为您没有添加带有以下内容的 scrollbars 属性:

That's probably because you didn't add scrollbars attributes with something like this:

<TextView
    android:id="@+id/your_tv"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:scrollbars = "vertical"
    android:text="@string/your_really_long_string" >
</TextView>

然后设置 movementMethod :

TextView tv = (TextView) findViewById(R.id.your_tv);
tv.setMovementMethod(new ScrollingMovementMethod());

---

更新

在匿名类和初始化程序块的帮助下，这有点丑陋，但可在Android 6.0上使用:

This is a bit ugly hacks, with the help of an anonymous class and an initializer block, but works on Android 6.0:

LinearLayout lly = (LinearLayout) findViewById(R.id.container);

TextView textView = new TextView(this) {
  {
    setVerticalScrollBarEnabled(true);
    setMovementMethod(ScrollingMovementMethod.getInstance());
    setScrollBarStyle(View.SCROLLBARS_INSIDE_INSET);

    // Force scrollbars to be displayed.
    TypedArray a = this.getContext().getTheme().obtainStyledAttributes(new int[0]);
      // the initializeScrollbars is marked with @removed on API 21 but it still there.
      // call the initializeScrollbars with reflection.
      try {
        // initializeScrollbars(TypedArray)
        Method initializeScrollbars =
            android.view.View.class.getDeclaredMethod("initializeScrollbars", TypedArray.class);
        initializeScrollbars.invoke(this, a);
      } catch (NoSuchMethodException e) {
        e.printStackTrace();
      } catch (InvocationTargetException e) {
        e.printStackTrace();
      } catch (IllegalAccessException e) {
        e.printStackTrace();
      }
    a.recycle();
  }
};

lly.addView(textView);
textView.setText(R.string.long_string);

代码是从 https://stackoverflow.com/a/19649335/4758255 和https://stackoverflow.com/a/28036532/4758255

字符串资源如下:

<resources>
  <string name="long_string">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum
  Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?

  At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Temporibus autem quibusdam et aut officiis debitis aut rerum necessitatibus saepe eveniet ut et voluptates repudiandae sint et molestiae non recusandae. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

  </string>
</resources>

您应将以上代码修改为布局.我以 LinearLayout 为例.

You should modify the above code to your layout. I'm using a LinearLayout as an example.

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