rghwang

Func1<OnTextChangeEvent, Boolean> isNotEmpty = t -> t.text().length() != 0;
            rx.Observable.combineLatest(
                    WidgetObservable.text(mNameTextView).map(isNotEmpty),
                    WidgetObservable.text(mCompanyTextView).map(isNotEmpty),
                    WidgetObservable.text(mTitleTextView).map(isNotEmpty),
                    (a, b, c) -> a && b && c
            ).subscribe(result -> {
                        Button btn = ((SignUpActivity) getActivity()).mDoneBtn;
                        if (result) {
                            btn.getBackground().setColorFilter(getResources().getColor(R.color.accent), PorterDuff.Mode.MULTIPLY);

rghwang

package com.wantedlab.android.wanted.helpers;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.util.AttributeSet;

rghwang

package com.wantedlab.android.wanted.helpers;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;