android - 在 android 文本切换器或 View 翻转器中将大文本分成页面

Question

我正在为 android 3.0 平板电脑开发电子书阅读器应用程序。首先，我有一大块字符串数据。我想根据设备的屏幕大小将该字符串拆分/拆分为页面 [我打算使用文本切换器或 View 翻转器]。虽然我尝试使用 getWindowManager() 方法，但我无法获得首选结果。

在以下线程中提到文本切换器会根据屏幕大小自动拆分文本。但是我不这么认为。 Managing text in android applicaiton like in a eBook

这是我使用的逻辑:

    // retreiving the flipper       
    flipper = (ViewFlipper) findViewById(R.id.new_view_flipper);        

    // obtaining screen dimensions      
    Display display = getWindowManager().getDefaultDisplay(); 
    int screenWidth = display.getWidth();
    int screenHeight = display.getHeight();

    // contentString is the whole string of the book

    while (contentString != null && contentString.length() != 0) 
    {
        totalPages ++;

        // creating new textviews for every page
        TextView contentTextView = new TextView(this);
        contentTextView.setWidth(ViewGroup.LayoutParams.FILL_PARENT);
        contentTextView.setHeight(ViewGroup.LayoutParams.FILL_PARENT);
        contentTextView.setMaxHeight(screenHeight);
        contentTextView.setMaxWidth(screenWidth);

        float textSize = contentTextView.getTextSize();
        Paint paint = new Paint();
        paint.setTextSize(textSize);

        int numChars = 0;
        int lineCount = 0;
        int maxLineCount = screenHeight/contentTextView.getLineHeight();
        contentTextView.setLines(maxLineCount);

        while ((lineCount < maxLineCount) && (numChars < contentString.length())) {
            numChars = numChars + paint.breakText(contentString.substring(numChars), true, screenWidth, null);
            lineCount ++;
        }

        // retrieve the String to be displayed in the current textbox
        String toBeDisplayed = contentString.substring(0, numChars);
        contentString = contentString.substring(numChars);
        contentTextView.setText(toBeDisplayed);
        flipper.addView(contentTextView);


        numChars = 0;
        lineCount = 0;
    }

Answer 1

这就是让您的代码正常工作所需的一切。

    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);
    int screenWidth = dm.widthPixels;
    int screenHeight= dm.heightPixels;

用我的替换下面的代码块。它会起作用。

Display display = getWindowManager().getDefaultDisplay(); 
int screenWidth = display.getWidth();
int screenHeight = display.getHeight();