On Jan 28, 11:24 am, Bill Michaelson <[email protected]> wrote: > I might be misunderstanding some restrictions or subtlety about the > use of Spannables in a TextView. > > It seems that whenever I apply an identical combination of display > enhancements to two separate and non-overlapping ranges of text, the > first set (earlier in the string) does not take effect in the actual > display. > > For example, if I make characters 0-3 foreground blue, and also > characters 12-14 foreground blue, then only characters 12-14 appear > blue. But if I use a different combination of enhancements for the > second range, say, blue foreground with white background, the all of > the enhancements appear in both ranges as expected. > > I hope the problem is in my own code, but I'm not seeing it, and I'm > suspecting that there is some consolidation at a lower level occurring > that is going awry. Here is a class I use to apply this stuff: > > class EnhTextBuilder { > public static final String TAG = "ETB"; > StringBuilder sbb; > Vector<Enote> enhVec; // hold enhancements > > EnhTextBuilder () { > sbb = new StringBuilder(); > enhVec = new Vector<Enote>(); // hold enhancements > } > private class Enote { > int pos, len; > Object enh; > Enote (int p, int l, Object e) { > pos = p; len = l; enh = e; > } > } > void append (String s) { > Log.d(TAG,"ETB text:"+s); > sbb.append(s); > } > void append (String s, Object e) { > Log.d(TAG,"ETB E:"+e); > enhVec.add(new Enote(sbb.length(),s.length(),e)); > append(s); > } > void append (String s, Object[] e) { > for (int i = 0; i < e.length; i++) { > Log.d(TAG,"ETB E:"+e[i]); > enhVec.add(new Enote(sbb.length(),s.length(),e[i])); > } > append(s); > } > public String toString () { return sbb.toString(); } > > // Put text into TextView and apply accumulated span > enhancements... > public void setText (TextView tv) { > tv.setText(sbb.toString()); > SpannablesText = (Spannable)tv.getText(); > //Log.d(TAG,"Spannablelen:"+sText.length()); > for (Iterator ei = enhVec.iterator(); ei.hasNext(); ) { > Enote e = (Enote)ei.next(); > //Log.d(TAG,"Enh P: "+e.pos+" for "+e.len); > sText.setSpan(e.enh,e.pos,e.pos+e.len,0); > } > } > > }
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