JakeWharton

import android.text.SpannableStringBuilder;
import java.util.ArrayDeque;
import java.util.Deque;

import static android.text.Spanned.SPAN_INCLUSIVE_EXCLUSIVE;

/** A {@link SpannableStringBuilder} wrapper whose API doesn't make me want to stab my eyes out. */
public class Truss {
  private final SpannableStringBuilder builder;
  private final Deque<Span> stack;

kosiara

#build.gradle
#
#    compile 'io.reactivex:rxandroid:1.0.1'
#    compile 'io.reactivex:rxjava:1.0.14'
#    compile 'io.reactivex:rxjava-math:1.0.0'
#    compile 'com.jakewharton.rxbinding:rxbinding:0.2.0'

# rxjava
-keep class rx.schedulers.Schedulers {
    public static <methods>;

ch4vi

import android.text.SpannableStringBuilder
import android.text.Spanned.SPAN_INCLUSIVE_EXCLUSIVE
import java.util.*

/** A [SpannableStringBuilder] wrapper whose API doesn't make me want to stab my eyes out.  */
class KTruss {
    private val builder: SpannableStringBuilder = SpannableStringBuilder()
    private val stack: Deque<Span> = ArrayDeque<Span>()

    fun append(string: String): KTruss {