Simple-text-styling-Android- A simple framework for text styling in android
In android its not very simple to manipulate text in a simple EditText without using a special library or some form of richtext xml widget that consumes large amount of space and makes all text editors similar .This app does just that a simple customization text editing method exists that accepts simple parameters of type or size of span and both the start and end of the spanned text.
For the size parameter :
-1 makes text bold
-2 Highlights text provided the color is in integer hicolor
-3 underline
-4 italic
1 decrease text size by amount var
2 decrease text size by amount var
(any size) changes text to that size
After thorough testing and investigation on text behavior in android this method is the end result
private void Spanning(int size, int ss, int se) {//Styling
int st = m.getSelectionStart();
int end = m.getSelectionEnd();
int ind = -1;
int oldei = -1;
m.clearComposingText();
int maindiff = 0;
int colororig = hicolor;
int colorchang = 0;
String separation = "0";
SpannableString selection = new SpannableString(m.getText().subSequence(ss, se));//selected part
SpannableString selectionl = new SpannableString("");
SpannableString selectionr = new SpannableString("");
SpannedString newparts = new SpannedString("");
AbsoluteSizeSpan[] spannedsize = m.getText().getSpans(ss, se, AbsoluteSizeSpan.class);
StyleSpan[] spannedsize2 = m.getText().getSpans(ss, se, StyleSpan.class);
BackgroundColorSpan[] spannedsize3 = m.getText().getSpans(ss, se, BackgroundColorSpan.class);
UnderlineSpan[] spannedsize4 = m.getText().getSpans(ss, se, UnderlineSpan.class);
//abs size spans selection
int v = -1;
if (size < 0) {
for (int xc = 0; size == -2 ? xc < spannedsize3.length : size == -3 ? xc < spannedsize4.length : xc < spannedsize2.length; xc++) {//check removal
int sps = m.getText().getSpanStart(size == -2 ? spannedsize3[xc] : size == -3 ? spannedsize4[xc] : spannedsize2[xc]);
int spe = m.getText().getSpanEnd(size == -2 ? spannedsize3[xc] : size == -3 ? spannedsize4[xc] : spannedsize2[xc]);//endinf index
if (size == -2) {
colororig = spannedsize3[xc].getBackgroundColor();
if (colororig != hicolor) {
colorchang = 1;
}
} else if (size == -4 || size == -1) {
int vcheck = spannedsize2[xc].getStyle();
if ((size == -4 && vcheck == Typeface.BOLD || size == -1 && vcheck == Typeface.ITALIC)) {
if ((ss == sps && se == spe)) {
ind = 1;
} else
ind = -2;// difference exists
}
}
if (!(ss == sps && se == spe)) {
if (ss < spe && sps < ss && se>spe ) {// left spanned part within selection
maindiff = maindiff + (spe - ss);
} else if (se < spe && sps < se && ss<sps ) {//right //
maindiff = maindiff + (se - sps);
} else if(se-ss>spe-sps){
maindiff = maindiff + (spe - sps);// in selection
}else
maindiff = maindiff + (se - ss);// outside selection
} else {
maindiff = (se - ss);
break;
}
}
}
int sstyle = 0, shigh = 0, sunder = 0;
int style = 0, high = 0, under = 0, abs = 0;
int totallength = spannedsize.length + spannedsize2.length + spannedsize3.length + spannedsize4.length;
int actualtotallength = totallength;
for (int sp = 0; sp < totallength; sp++) {//for inside word
int pst = -1;
int pend = -1;
int subvar = -1;
int si = -1, ei = -1, si1 = -1, ei1 = -1, si2 = -1, ei2 = -1, si3 = -1, ei3 = -1;
if (spannedsize.length > (sp + (high + style + under))) {
si = m.getText().getSpanStart(spannedsize[sp + (high + style + under)]);
ei = m.getText().getSpanEnd(spannedsize[sp + (high + style + under)]);//endinf index
CurrentSize = spannedsize[sp + (high + style + under)].getSize();
pst = si;
pend = ei;
}
if (spannedsize4.length > sunder + (sp + (high + style + abs))) {
si3 = m.getText().getSpanStart(spannedsize4[sunder + (sp + (high + style + abs))]);
ei3 = m.getText().getSpanEnd(spannedsize4[sunder + (sp + (high + style + abs))]);//endinf index
if (ei3 < pend) {
pend = ei3;
pst = si3;
} else if (ei3 == pend) {
subvar = switchspans(size, sstyle, shigh, sunder, sp, high, under, abs, style);//for getting the right index of the span
totallength = totallength - 1;
} else if (pend == -1) {
pst = si3;
pend = ei3;
}
}
if (spannedsize2.length > sstyle + (sp + (high + under + abs))) {
si1 = m.getText().getSpanStart(spannedsize2[sstyle + (sp + (high + under + abs))]);
ei1 = m.getText().getSpanEnd(spannedsize2[sstyle + (sp + (high + under + abs))]);//endinf index
v = spannedsize2[sstyle + (sp + (high + under + abs))].getStyle();
if (ei1 < pend) {
pend = ei1;
pst = si1;
} else if (ei1 == pend) {
subvar = switchspans(size, sstyle, shigh, sunder, sp, high, under, abs, style);
totallength = totallength - 1;
} else if (pend == -1) {
pst = si1;
pend = ei1;
}
}
if (spannedsize3.length > shigh + (sp + (style + under + abs))) {
si2 = m.getText().getSpanStart(spannedsize3[shigh + (sp + (style + under + abs))]);
ei2 = m.getText().getSpanEnd(spannedsize3[shigh + (sp + (style + under + abs))]);//endinf index
colororig = spannedsize3[shigh + (sp + (style + under + abs))].getBackgroundColor();
if (ei2 < pend) {
pend = ei2;
pst = si2;
} else if (ei2 == pend) {
subvar = switchspans(size, sstyle, shigh, sunder, sp, high, under, abs, style);
totallength = totallength - 1;
} else if (pend == -1) {
pst = si2;
pend = ei2;
}
}
// for selecting the main index, shifting and shifting similarities
if (pend == ei) {
if (subvar == -1) {
subvar = sp + (high + style + under);
}
abs--;
}
if (pend == ei1) {
if (pend != ei) {
if (subvar == -1) {
subvar = (sstyle) + (sp + (high + under + abs));
}
style--;
} else {//if there is a similarity
sstyle++;
}
}
if (pend == ei2) {
if (pend != ei && pend != ei1) {
if (subvar == -1) {
subvar = (shigh) + (sp + (style + under + abs));
}
high--;
} else {
shigh++;
}
}
if (pend == ei3) {
if (pend != ei && pend != ei1 && pend != ei2) {
if (subvar == -1) {
subvar = (sunder) + (sp + (high + style + abs));
}
under--;
} else {
sunder++;
}
}
if (pst < ss && ss < pend && pend < se) {
if (ss < ei && si < ss && se > ei) {//abs left
selectionl = new SpannableString(m.getText().subSequence(si, ss));
selectionl.removeSpan(spannedsize[subvar]);
separation = "l";
selectionl.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pst = ss;
si = pst;
}
if (ss < ei1 && si1 < ss && se > ei1) {//STYLE left
if (!separation.contains("l")) {
selectionl = new SpannableString(m.getText().subSequence(si1, ss));
selectionl.removeSpan(spannedsize2[subvar]);
}
separation = "l";
if (v == Typeface.ITALIC) {//fot itallic
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (v == Typeface.BOLD_ITALIC) {
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pst = ss;
si1 = pst;
}
if (ss < ei2 && si2 < ss && se > ei2) {// highlight left
if (!separation.contains("l")) {
selectionl = new SpannableString(m.getText().subSequence(si2, ss));
selectionl.removeSpan(spannedsize3[subvar]);
}
separation = "l";
selectionl.setSpan((new BackgroundColorSpan(colororig)), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pst = ss;
si2 = pst;
}
if (ss < ei3 && si3 < ss && se > ei3) {// underline left
if (!separation.contains("l")) {
selectionl = new SpannableString(m.getText().subSequence(si3, ss));
selectionl.removeSpan(spannedsize4[subvar]);
}
separation = "l";
selectionl.setSpan((new UnderlineSpan()), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pst = ss;
si3 = pst;
}
} else if (se < pend && pst < se && ss < pst) {
if (se < ei && si < se && ss < si) {//abs right
selectionr = new SpannableString(m.getText().subSequence(si, se));
selectionr.removeSpan(spannedsize[subvar]);
separation = "r";
selectionr.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pend = se;
ei = pend;
}
if (se < ei1 && si1 < se && ss < si1) {//STYLE right
if (!separation.contains("r")) {
selectionr = new SpannableString(m.getText().subSequence(si1, se));
selectionr.removeSpan(spannedsize2[subvar]);
}
separation = "r";
if (v == Typeface.ITALIC) {//fot itallic
selectionr.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (v == Typeface.BOLD_ITALIC) {
selectionr.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else
selectionr.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pend = se;
ei1 = pend;
}
if (se < ei2 && si2 < se && ss < si2) {// highlight right
if (!separation.contains("r")) {
selectionr = new SpannableString(m.getText().subSequence(si2, se));
selectionr.removeSpan(spannedsize3[subvar]);
}
separation = "r";
selectionr.setSpan((new BackgroundColorSpan(colororig)), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pend = se;
ei2 = pend;
Toast.makeText(this, String.valueOf(selectionr), Toast.LENGTH_SHORT).show();
}
if (se < ei3 && si3 < se && ss < si3) {// underline right
if (!separation.contains("r")) {
selectionr = new SpannableString(m.getText().subSequence(si3, se));
selectionr.removeSpan(spannedsize4[subvar]);
}
separation = "r";
selectionr.setSpan((new UnderlineSpan()), 0, selectionr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
pend = se;
ei3 = pend;
Toast.makeText(this, String.valueOf(selectionr), Toast.LENGTH_SHORT).show();
}
}
//separation implementation
if (separation.equals("l") && sp == 0 || separation.equals("r")) {
a = (SpannedString) TextUtils.concat(a.subSequence(0, ss - selectionl.length()), selectionl, a.subSequence(ss, selectionr.toString().isEmpty() ? m.length() : se - selectionr.length()), selectionr, selectionr.toString().isEmpty() ? "" : a.subSequence(se, m.length()));
m.setText(a);
//separated so they can only come in right
}
if ((ss > si && se <= ei || ss >= si && se < ei) || (ss > si3 && se <= ei3 || ss >= si3 && se < ei3) || ((ss > si1 && se <= ei1 || ss >= si1 && se < ei1)) || ((ss > si2 && se <= ei2 || ss >= si2 && se < ei2))) {//inword
separation = "w";
if ((ss > si && se <= ei || ss >= si && se < ei)) {
selectionl = new SpannableString(m.getText().subSequence(si, ss));
selectionl.removeSpan(spannedsize[subvar]);
if (si != ss) {
selectionl.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (ei != se) {
selection.removeSpan(spannedsize[subvar]);
selection.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);//to be done anyways
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, si), selectionl, selection, m.getText().subSequence(se, m.length()));
if (ss > si) {//shifting indexis
pst = ss;
}
if (se < ei) {
pend = se;
ei = pend;
}
}
if ((ss > si1 && se <= ei1 || ss >= si1 && se < ei1)) {//styling
if (selectionl.toString().isEmpty()) {
selectionl = new SpannableString(m.getText().subSequence(si1, ss));
} else
selectionl.removeSpan(spannedsize2[subvar]);
if (si1 != ss) {
if (v == Typeface.ITALIC) {
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (v == Typeface.BOLD) {
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else
selectionl.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (ei1 != se) {
selection.removeSpan(spannedsize2[subvar]);
if (v == Typeface.BOLD) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (v == Typeface.ITALIC) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (v == Typeface.BOLD_ITALIC) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, si1), selectionl, selection, m.getText().subSequence(se, m.length()));
if (ss > si1) {
pst = ss;
}
if (se < ei1) {
pend = se;
ei1 = pend;
}
}
if ((ss > si2 && se <= ei2 || ss >= si2 && se < ei2)) {//highlight
if (selectionl.toString().isEmpty()) {
selectionl = new SpannableString(m.getText().subSequence(si2, ss));
} else
selectionl.removeSpan(spannedsize3[subvar]);
if (si2 != ss) {
selectionl.setSpan((new BackgroundColorSpan(colororig)), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (ei2 != se) {
selection.removeSpan(spannedsize3[subvar]);
selection.setSpan((new BackgroundColorSpan(colororig)), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, si2), selectionl, selection, m.getText().subSequence(se, m.length()));
if (ss > si2) {
pst = ss;
}
if (se < ei2) {
pend = se;
ei2 = pend;
}
}
if ((ss > si3 && se <= ei3 || ss >= si3 && se < ei3)) {//underline
if (selectionl.toString().isEmpty()) {
selectionl = new SpannableString(m.getText().subSequence(si3, ss));
} else
selectionl.removeSpan(spannedsize4[subvar]);
if (si3 != ss) {
selectionl.setSpan((new UnderlineSpan()), 0, selectionl.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (ei3 != se) {
selection.removeSpan(spannedsize4[subvar]);
selection.setSpan((new UnderlineSpan()), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, si3), selectionl, selection, m.getText().subSequence(se, m.length()));
if (ss > si3) {
pst = ss;
}
if (se < ei3) {
pend = se;
ei3 = pend;
}
}
m.setText(a);
}
if (separation.equals("r") || separation.equals("w")) {//resettinf for word and right part
spannedsize4 = m.getText().getSpans(ss, se, UnderlineSpan.class);//abs size spans selection
spannedsize3 = m.getText().getSpans(ss, se, BackgroundColorSpan.class);//abs size spans selection
spannedsize2 = m.getText().getSpans(ss, se, StyleSpan.class);//abs size spans selection
spannedsize = m.getText().getSpans(ss, se, AbsoluteSizeSpan.class);//abs size spans selection
if (separation.equals("r")) {//for addingg +ve or -ve
int newtotallength = spannedsize.length + spannedsize2.length + spannedsize3.length + spannedsize4.length;
if (actualtotallength != newtotallength) {
subvar = subvar - (actualtotallength - newtotallength);
}
}
}
if ((size == 0 || size > 0) && pend == ei || (size == -4 || size == -1) && pend == ei1 || size == -2 && pend == ei2 || size == -3 && pend == ei3) {// if span is same type
m.getText().removeSpan(size == -2 && ((maindiff == (se - ss) || colorchang == 1)) ? spannedsize3[subvar] : size == -2 ? null : size == -3 && maindiff == (se - ss) ? spannedsize4[subvar] : size < 0 && (maindiff == (se - ss) || ind == -2) ? spannedsize2[subvar] : size < 0 ? null : spannedsize[subvar]);//for all possabilities plus inf whole span is selected for style spans it gets removed
}
if (oldei >= 0 && pst - oldei > 1) {//get middle//
if (size == 0) {// FOR middle empty
CurrentSize = (int) (m.getTextSize() + var);// input size
}
selection = new SpannableString(m.getText().subSequence(oldei + 1, pst));
selection = empty(size, selection);
newparts = (SpannedString) TextUtils.concat(newparts, selection);
}
oldei = pend - 1;
selection = new SpannableString(m.getText().subSequence(pst, pend));
if ((ind > -1 || (size == -3 ? pend != ei3 : size == -2 ? pend != ei2 : size < 0 && pend != ei1))) {//if no spans in same type
if (ind > -1) {
selection.removeSpan(spannedsize2[subvar]);//remove the prev abs size span
m.getText().removeSpan(spannedsize2[subvar]);
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -1) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -4) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -3) {//underlinspan
selection.setSpan((new UnderlineSpan()), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -2) {//underlinspan
selection.setSpan((new BackgroundColorSpan(hicolor)), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
} else if ((size == -4 || size == -1) && (ind == -2 || maindiff == (se - ss) && spannedsize2[subvar].getStyle() == Typeface.BOLD_ITALIC)) {
if (size == -1 && spannedsize2[subvar].getStyle() == Typeface.BOLD_ITALIC) {//bold
if (ind == -2) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -4 && spannedsize2[subvar].getStyle() == Typeface.BOLD_ITALIC) {//bold
if (ind == -2) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if ((size == -1 && spannedsize2[subvar].getStyle() == Typeface.ITALIC) || (size == -4 && spannedsize2[subvar].getStyle() == Typeface.BOLD)) {//bold
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if ((size == -1 && spannedsize2[subvar].getStyle() == Typeface.BOLD && ind == -2)) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if ((size == -4 && spannedsize2[subvar].getStyle() == Typeface.ITALIC && ind == -2)) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
} else if (size == -2 && colorchang == 1) {//SPANS HIGHLIGHT AND NON HIGHLIGHT SPANS
selection.setSpan((new BackgroundColorSpan(hicolor)), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == 0 || size > 0) {//SPANS ABS SIZE,TOTAL SIZE AND NO SIZE SPANS
switch (size) {
case 0:
if (pend == ei) {
if (spannedsize[subvar].getSize() + var < 0) {
CurrentSize = 1;
} else
CurrentSize = spannedsize[subvar].getSize() + var;//adding or sub
} else if (m.getTextSize() + var < 0) {
CurrentSize = 1;
} else
CurrentSize = (int) (m.getTextSize() + var);// input size
break;
default:
CurrentSize = size;
break;
}
selection.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (size == 0) {// FOR middle empty
CurrentSize = (int) (m.getTextSize() + var);// input size
}
newparts = (SpannedString) TextUtils.concat(newparts, selection);
if (sp == 0 && pst > 0 && ss < pst) {
selection = new SpannableString(m.getText().subSequence(ss, pst));
selection = empty(size, selection);
newparts = (SpannedString) TextUtils.concat(selection, newparts);
}
if (sp == totallength - 1 && se > pend) {
selection = new SpannableString(m.getText().subSequence(pend, se));
pend = se;//to catch last char
selection = empty(size, selection);
newparts = (SpannedString) TextUtils.concat(newparts, selection);
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, ss), newparts, m.getText().subSequence(pend, m.length())
);
}
if (totallength == 0) {
if (size == -1) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -4) {
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -3) {//underlinspan
selection.setSpan((new UnderlineSpan()), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else if (size == -2) {
selection.setSpan((new BackgroundColorSpan(hicolor)), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
} else {
if (size == 0) {
if (m.getTextSize() + var < 0) {
CurrentSize = 1;
} else
CurrentSize = (int) (m.getTextSize() + var);
} else
CurrentSize = size;
selection.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
a = (SpannedString) TextUtils.concat(m.getText().subSequence(0, ss), selection, m.getText().subSequence(se, m.length()));
}
m.setText(a);
m.setSelection(st, end);
}As complicated as it seems its actually extremely fast because it takes all different types of spans
simulatinusly in one loop .
It deals with a major problem in spanning text in android and thats when part
of a spanned text is spanned the texts original
span gets removed.
it also comes with these 2 methods
private SpannableString empty(int size, SpannableString selection) {//for empty parts
switch (size) {
case -1:
selection.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case -3:
selection.setSpan((new UnderlineSpan()), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case -2:
selection.setSpan((new BackgroundColorSpan(hicolor)), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case -4:
selection.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
default:
selection.setSpan(new AbsoluteSizeSpan(CurrentSize), 0, selection.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return selection;
}
private int switchspans(int size, int sstyle, int shigh, int sunder, int sp, int high, int under, int abs, int style) {
int subvar;
switch (size) {
case -1:
case -4:
subvar = (sstyle) + (sp + (high + under + abs));
break;
case -3:
subvar = (sunder) + (sp + (high + style + abs));
break;
case -2:
subvar = (shigh) + (sp + (style + under + abs));
break;
default:
subvar = sp + (high + style + under);
break;
}
return subvar;
}Saving and retriving
Now since the spanning method separates all the spans preventing any overlap between them the spans can be extracted in string form ,saved then retrieved and spanned normally .Using the following methods
This method serializes the spans into String form:-
private void serialization(){
serial="";
//initiation
AbsoluteSizeSpan[] spannedsize = m.getText().getSpans(0, m.length(), AbsoluteSizeSpan.class);
StyleSpan[] spannedsize2 = m.getText().getSpans(0, m.length(), StyleSpan.class);
BackgroundColorSpan[] spannedsize3 = m.getText().getSpans(0, m.length(), BackgroundColorSpan.class);
UnderlineSpan[] spannedsize4 = m.getText().getSpans(0, m.length(), UnderlineSpan.class);
int totallength = spannedsize.length + spannedsize2.length + spannedsize3.length + spannedsize4.length;
for (int i=0;i<totallength;i++){
int startspan=-1,endspan=-1,startspan2=-1,endspan2=-1,startspan3=-1,endspan3=-1,startspan4=-1,endspan4=-1;
if (spannedsize.length>i){
startspan=m.getText().getSpanStart(spannedsize[i]);
endspan=m.getText().getSpanEnd(spannedsize[i]);
serial=serial+startspan+" "+endspan+" "+"s"+spannedsize[i].getSize();
}
if (spannedsize2.length>i) {
startspan2 = m.getText().getSpanStart(spannedsize2[i]);
endspan2 = m.getText().getSpanEnd(spannedsize2[i]);
if (startspan == startspan2 && endspan == endspan2) {
switch (spannedsize2[i].getStyle()) {
case Typeface.ITALIC:
serial = serial +" "+"I";
break;
case Typeface.BOLD:
serial = serial +" "+ "B";
break;
case Typeface.BOLD_ITALIC:
serial = serial +" "+ "BI";
break;
}
} else {
switch (spannedsize2[i].getStyle()) {
case Typeface.ITALIC:
serial = serial + (serial.isEmpty() || serial.charAt(serial.length() - 1) == ',' ? "" : " ,") + startspan2 + " " + endspan2 + " " + "I";
break;
case Typeface.BOLD:
serial = serial + (serial.isEmpty() || serial.charAt(serial.length() - 1) == ',' ? "" : " ,") + startspan2 + " " + endspan2 + " " + "B";
break;
case Typeface.BOLD_ITALIC:
serial = serial + (serial.isEmpty() || serial.charAt(serial.length() - 1) == ',' ? "" : " ,") + startspan2 + " " + endspan2 + " " + "BI";
break;
}
}
if (startspan > -1) {
totallength--;
}
}
if (spannedsize3.length>i){
startspan3=m.getText().getSpanStart(spannedsize3[i]);
endspan3=m.getText().getSpanEnd(spannedsize3[i]);
if( startspan3==startspan2&&endspan3==endspan2||startspan3==startspan&&endspan3==endspan){
spannedsize3[i].getBackgroundColor();
serial=serial+" "+spannedsize3[i].getBackgroundColor();
}else{
serial=serial+(serial.isEmpty()||serial.charAt(serial.length()-1)==','?"":" ,")+startspan3+" "+endspan3+" "+spannedsize3[i].getBackgroundColor();
}
if(startspan>-1||startspan2>-1){
totallength--;
}
}
if (spannedsize4.length>i){
startspan4=m.getText().getSpanStart(spannedsize4[i]);
endspan4=m.getText().getSpanEnd(spannedsize4[i]);
if( startspan3==startspan4&&endspan3==endspan4||startspan4==startspan2&&endspan4==endspan2||startspan4==startspan&&endspan4==endspan){
serial=serial+" "+"U";
}else{
serial=serial+(serial.isEmpty()||serial.charAt(serial.length()-1)==','?"":" ,")+startspan4+" "+endspan4+" "+"U";
}
if(startspan>-1||startspan2>-1||startspan3>-1){
totallength--;
}
}
serial=serial+" ,";
}
}The method gets called then saving the text and serial string separately (can be added inside onBackPressed() function.
serialization();
values.put(Database.Text, m.getText().toString());
values.put(Database.RICHText, serial);
if(c.getCount()==0) {
sql.insert(Database.MTable, null, values);
}else
sql.update(Database.MTable, values, null, null);
Toast.makeText(this, "Saved", Toast.LENGTH_SHORT).show();And finally Retrieving from SQLite database:-
if (c.moveToFirst()) {//retrival
String TEXT = c.getString(c.getColumnIndex(Database.Text));
String seriald= c.getString(c.getColumnIndex(Database.RICHText));
SpannableString RichText= SpannableString.valueOf(TEXT);
if (!seriald.isEmpty()) {
String[] commas = seriald.split(",");
for (int i = 0; i < commas.length; i++) {
int left = Integer.parseInt(commas[i].substring(0, commas[i].indexOf(" ")));
int right = Integer.parseInt(commas[i].substring(commas[i].indexOf(" ") + 1, commas[i].indexOf(" ", commas[i].indexOf(" ") + 1)));
//search on types in the commas[i] and span accordingly.
if (commas[i].contains("BI")) {
RichText.setSpan(new android.text.style.StyleSpan(Typeface.BOLD_ITALIC), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}else{
if (commas[i].contains("B")) {
RichText.setSpan(new android.text.style.StyleSpan(Typeface.BOLD), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (commas[i].contains("I")) {
RichText.setSpan(new android.text.style.StyleSpan(Typeface.ITALIC), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
if (commas[i].contains("U")) {
RichText.setSpan((new UnderlineSpan()), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (commas[i].contains("-")) {
int color = Integer.parseInt(commas[i].substring(commas[i].indexOf("-"), commas[i].indexOf(" ", commas[i].indexOf("-"))));
RichText.setSpan((new BackgroundColorSpan(color)), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
if (commas[i].contains("s")) {
int Size = Integer.parseInt(commas[i].substring(commas[i].indexOf('s') + 1, commas[i].indexOf(" ", commas[i].indexOf('s') + 1)));
RichText.setSpan(new AbsoluteSizeSpan(Size), left, right, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
m.setText(RichText);
}This app is called NovelMessages https://play.google.com/store/apps/details?id=com.app.boshra.fragments
it has other great features but simple and efficent text spanning is its main one.