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Code Issues Releases Wiki Activity

Generate letter icons

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This commit is contained in:
M66B 2019-04-25 13:45:52 +02:00
parent 240a30b1a3
commit f2112d3268
2 changed files with 47 additions and 13 deletions
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11
app/src/main/java/eu/faircode/email/ContactInfo.java
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@ -133,13 +133,16 @@ public class ContactInfo {
} }
if (info.bitmap == null) { if (info.bitmap == null) {
boolean identicons = prefs.getBoolean("identicons", false);
if (identicons) {
TypedValue tv = new TypedValue(); TypedValue tv = new TypedValue();
context.getTheme().resolveAttribute(R.attr.themeName, tv, true); context.getTheme().resolveAttribute(R.attr.themeName, tv, true);
int dp = Helper.dp2pixels(context, 48); int dp = Helper.dp2pixels(context, 48);
info.bitmap = Identicon.generate(key, dp, 5, !"light".equals(tv.string));
} boolean dark = !"light".equals(tv.string);
boolean identicons = prefs.getBoolean("identicons", false);
if (identicons)
info.bitmap = Identicon.icon(key, dp, 5, dark);
else
info.bitmap = Identicon.letter(key, dp, dark);
} }
if (info.displayName == null) if (info.displayName == null)

45
app/src/main/java/eu/faircode/email/Identicon.java
View file

@ -31,13 +31,8 @@ import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException; import java.security.NoSuchAlgorithmException;
class Identicon { class Identicon {
static Bitmap generate(String email, int size, int pixels, boolean dark) { static Bitmap icon(String email, int size, int pixels, boolean dark) {
byte[] hash; byte[] hash = getHash(email);
try {
hash = MessageDigest.getInstance("MD5").digest(email.getBytes());
} catch (NoSuchAlgorithmException ignored) {
hash = email.getBytes();
}
int color = Color.argb(255, hash[0], hash[1], hash[2]); int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = ColorUtils.blendARGB(color, dark ? Color.WHITE : Color.BLACK, 0.2f); color = ColorUtils.blendARGB(color, dark ? Color.WHITE : Color.BLACK, 0.2f);
@ -63,4 +58,40 @@ class Identicon {
return bitmap; return bitmap;
} }
static Bitmap letter(String email, int size, boolean dark) {
byte[] hash = getHash(email);
int color = Color.argb(255, hash[0], hash[1], hash[2]);
color = ColorUtils.blendARGB(color, dark ? Color.WHITE : Color.BLACK, 0.2f);
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(color);
Paint paint = new Paint();
paint.setColor(Color.argb(
Color.alpha(color),
(~Color.red(color)) & 0xff,
(~Color.green(color)) & 0xff,
(~Color.blue(color)) & 0xff));
paint.setTextSize(size / 2f);
paint.setFakeBoldText(true);
String text = email.substring(0, 1).toUpperCase();
canvas.drawText(
text,
size / 2f - paint.measureText(text) / 2,
size / 2f - ((paint.descent() + paint.ascent()) / 2), paint);
return bitmap;
}
private static byte[] getHash(String email) {
try {
return MessageDigest.getInstance("MD5").digest(email.getBytes());
} catch (NoSuchAlgorithmException ignored) {
return email.getBytes();
}
}
} }