我正在开发一个android 3.0平板电脑的电子书阅读器应用程序。首先,我有一大块String数据。我想根据设备的屏幕大小拆分/打破字符串到页面[我计划使用文本切换器或视图翻转]。虽然我尝试使用getWindowManager()方法,但我无法获得首选结果。
在下面的线程中提到,文本切换器根据屏幕大小自动断开文本。但我不这么认为。在android应用程序中像在电子书中一样管理文本
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;
}
这就是使代码工作所需的全部内容。
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth = dm.widthPixels;
int screenHeight= dm.heightPixels;
用我的代码块替换下面的代码块。它会成功的。
Display display = getWindowManager().getDefaultDisplay();
int screenWidth = display.getWidth();
int screenHeight = display.getHeight();