Question

I’m trying to make a textview that scales the contents so that it all shows, no cropping, multi lines or elipsis.

I’ll quickly run through the layout just to put it into context.

*There’s a gridview with several rows and columns.
*The items for the gridview are provided by an adapter which returns (pseudo markup 🙂 ):-

<LinearLayout Orientation=vertical>
    <MyCustomTextview name='titletext' Not multiline />
    <MyCustomTextview name='itemtext' Not multiline />
</LinearLayout>

I’ve tried overriding onSizeChanged as this is where several google results pointed me and I started with:-

...
if (this.getLinecount() > 1)
{
    this.setTextSize(... currentsize -10);
}
...

and this gave me really small text where it would have appeared on more than one line, so I knew I could resize and find out if the TextView had more than one line correctly.

so I progressed to:-

while (this.getLinecount() > 1)
{
    this.setTextSize(... currentsize - 1);
}

which I expected to run until the text was small enough, but after the call to setTextSize getLineCount() returns 0, I believe this is because it needs to recalculate the text size so I tried various combinations of refreshLayout(), forceLayout() and invalidate() to no avail.

I’ve an idea for perhaps a better approach, but I don’t know if it’s easily attainable:-

onSizeChanged is called after it is put into the Gridview by the Adapter so I will execute my code there, but is the following possible and how:-

• The TextView is set to a width of fill parent, can I accurately tell a pixel size of the width of available space for text? (I believe there may be padding and such applied)
• I then intend to use measureText(String) to see if the text will fit, if not decrease size and check again.

I believe that would be a good solution, but I’m not sure on the accurate measurement of available space, and if the event I’ve chosen would be best.

Any assistance would be appreciated.

• Anthony

Answer 1

Why don’t you try the same sort of approach, but use measureText instead?

while (mPaint.measureText(MyTextString)>mTextView.getWidth() ) //maybe adjust for padding/margins etc
{
    mPaint.setTextSize(... currentsize - 1);
}