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我正在尝试将长字符串显示到多个页面中。我的 Activity.xml 有一个文本视图,它占据了屏幕高度的 90%(这是我设置的相对布局)。我需要一些帮助来找出可以用来实现目标的正确方法/类

下面是我的代码。粗体内容(代码中以 ** 开头的注释)是我需要帮助的地方。

public class StoryActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_story);

    String contentString;
    String pageString;
    final int screenWidth;
    final int screenHeight;
   final int pageWidth;
   final int pageHeight;
   final int totalPages;
   int pageNumber;


    //load the content into the string contentString    
    InputStream is = getAssets().open("Story.txt");
        int size = is.available();
       byte[] buffer = new byte[size];
       is.read(buffer);
       is.close();
     contentString = new String(buffer);

           // get screen dimensions       
       DisplayMetrics dm = new DisplayMetrics();
       getWindowManager().getDefaultDisplay().getMetrics(dm);
       screenWidth = dm.widthPixels;
       screenHeight= dm.heightPixels;

       // create textview
       TextView tv = (TextView)findViewById(R.id.textViewStory);

             // calculate pageheight since textview size is 90% of the screen 
            pageHeight = (int) (0.9* screenHeight);
            pageWidth = screenWidth;

            **// 1)need to find number of lines which will fit pageHeight
            // 2)then I need to find total number of lines in my String contentString
            // 3)dividing 2) by 1) can give me number of pages required to display 
            // contentString. 
            // 4)I can then concatenate contentString at number of lines as found in 
            // 1) and thus I know what text (pageString) to display in page1**

            tv.setText(pageString); 

            **// steps 4) can be repeated to display next page when user click 
            // “nextpage” button**         

    }
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1 回答 1

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我不会为您提供完整的解决方案,但我找到了可以帮助您的答案。

  1. 首先有助于找出 TextView 宽度可以容纳多少个字符。
  2. 其次有助于获得 TextView 准确显示的行数。

但是换行存在问题。您需要应用一些算法来找出 android 框架是如何包装文本的,或者为它执行此操作。这是文本换行的好答案

于 2013-01-06T22:33:35.420 回答