Re: [android-developers] TextView maxLines based on height
Hi,
I guess now i have understood my issue and can explain it much better and
clearly.
I am loading all my view dynamically in a Horizontal ViewGroup. Inside one
view there a collection of pictures along with text and the bottom. I have
the width and height of the view fixed (When creating a view i pass the
width and height to the layout params).
The image is loaded dynamically, till then a loading icon is display. But
the text is already display in the TextView. The visible lineCount that I
get before the image is different than the lineCount that I actually
displayed after the Image is loaded. I want to revalidate the whole view
again after the image loading and displayed in the UI.
I tried sevaral methods to revalidate the TextView, the Layouts, but none
of it help me to get the correct visible line count after image is loaded.
-Ankur.
On Sat, Feb 15, 2014 at 5:27 PM, Ralph Bergmann | the4thFloor.eu
ra...@the4thfloor.eu wrote:
Am 13.02.14 03:54, schrieb Ankur Avlani:
Can someone please suggest me some faster was to achieve my requirement.
try this one:
/**
* Calculates the lines needed to show the text.
*
* @param paint
* the TextPaint from the TextView
* @param text
* the text for the calculation
* @param textAppearance
* text typeface, size, and style
* @param avail
* the available width
* @return the number of lines needed to show the text
*/
public static int neededLines(final TextPaint paint, final String text,
final TextAppearanceSpan textAppearance, final int avail) {
if (TextUtils.isEmpty(text)) {
return 0;
}
final TextPaint textPaint = new TextPaint();
textPaint.set(paint);
textPaint.setTextSize(textAppearance.getTextSize());
textPaint.setTypeface(Typeface.create(textAppearance.getFamily(),
textAppearance.getTextStyle()));
final StaticLayout layout = new StaticLayout(text, textPaint, avail,
Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);
final int lineCount = layout.getLineCount();
return lineCount;
}
Ralph
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Re: [android-developers] TextView maxLines based on height
Am 13.02.14 03:54, schrieb Ankur Avlani:
Can someone please suggest me some faster was to achieve my requirement.
try this one:
/**
* Calculates the lines needed to show the text.
*
* @param paint
* the TextPaint from the TextView
* @param text
* the text for the calculation
* @param textAppearance
* text typeface, size, and style
* @param avail
* the available width
* @return the number of lines needed to show the text
*/
public static int neededLines(final TextPaint paint, final String text,
final TextAppearanceSpan textAppearance, final int avail) {
if (TextUtils.isEmpty(text)) {
return 0;
}
final TextPaint textPaint = new TextPaint();
textPaint.set(paint);
textPaint.setTextSize(textAppearance.getTextSize());
textPaint.setTypeface(Typeface.create(textAppearance.getFamily(),
textAppearance.getTextStyle()));
final StaticLayout layout = new StaticLayout(text, textPaint, avail,
Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);
final int lineCount = layout.getLineCount();
return lineCount;
}
Ralph
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[android-developers] TextView maxLines based on height
Hi All,
I am designing an native custom article view in android. My requirement is
such that I have a long text which i need to break into pages. I can
find out the total height of my TextView, how do i calculate the max
visible lines for the view based on the height?
I know Paint.breakText will do for me, but its very slow. Please have a
look at the following code snippet:
public static int getTextLineCountForHeight(String text, int maxWidth,
float textSize, Typeface typeface, int maxHeight) {
TextPaint paint = new TextPaint(Paint.LINEAR_TEXT_FLAG |
Paint.SUBPIXEL_TEXT_FLAG);
paint.setTextSize(textSize);
paint.setTypeface(typeface);
int lineCount = 0;
int index = 0;
int length = text.length();
Rect bounds = new Rect();
bounds.setEmpty();
while(index length - 1) {
bounds.setEmpty();
index += paint.breakText(text, index, length, true, maxWidth, null);
lineCount++;
paint.getTextBounds(Py, 0, 2, bounds);
if((int)Math.floor(lineCount * bounds.height())=maxHeight){
return lineCount;
}
}
return lineCount;
}
Can someone please suggest me some faster was to achieve my requirement.
Any help is highly appreciated.
-Ankur.
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