Vitaly Gashock gshockv

How to create custom button styles using Android's AppCompat-v7:21

Introduction

AppCompat is an Android support library to provide backwards-compatible functionality for Material design patterns. It currently comes bundled with a set of styles in the Theme.AppCompat and Widget.AppCompat namespaces. However, there is a critical component missing which I would have thought essential to provide the a default from which we could inherit our styles: Widget.AppCompat.Button. Sure, there's Widget.AppCompat.Light.ActionButton, but that doesn't actually inherit from Widget.ActionButton, which does not inherit from Widget.Button, so we might get some unexpected behavior using that as our base button style, mainly because Widget.ActionButton strictly belongs in the ActionBar.

So, if we want to have a decently normal default button style related to AppCompat, we need to make it ourselves. Let's start by digging into the Android SDK to see how it's doing default styles.

Digging In

You can use this class to realize a simple sectioned RecyclerView.Adapter without changing your code.

The RecyclerView should use a LinearLayoutManager. You can use this code also with the TwoWayView with the ListLayoutManager (https://github.com/lucasr/twoway-view)

This is a porting of the class SimpleSectionedListAdapter provided by Google

Example:

	07-22 16:12:52.732 4678-11525/com.videomedicine D/Retrofit: {"appointments":[],"items":[{"id":208,"doctor_id":353,"start":"2016-05-01 07:00:00","end":"2016-05-01 16:00:00","rule":"FREQ=DAILY;","timezone":"Europe\/Kiev","events":[]},{"id":216,"doctor_id":353,"start":"2016-07-21 14:00:00","end":"2016-07-21 17:00:00","rule":"FREQ=DAILY;UNTIL=2016-08-11 20:59:59;","timezone":"Europe\/Kiev","events":[]}]}
	07-22 16:12:52.732 4678-11525/com.videomedicine D/Retrofit: <--- END HTTP (343-byte body)
	07-22 16:12:52.744 4678-4678/com.videomedicine D/VideoMedicine: [ReadOnlyAvailableTimePresenter:whenAvailableTimeArrived:97]: RRule string: RRULE:FREQ=DAILY;
	07-22 16:12:52.763 4678-4678/com.videomedicine D/VideoMedicine: [ReadOnlyAvailableTimePresenter:whenAvailableTimeArrived:142]: Start cal [2016-06-01 07:00:00], End cal [2016-06-01 16:00:00]
	07-22 16:12:52.764 4678-4678/com.videomedicine D/VideoMedicine: [ReadOnlyAvailableTimePresenter:whenAvailableTimeArrived:142]: Start cal [2016-06-02 07:00:00], End cal [2016-06-02 16

	apply plugin: 'com.android.application'
	apply plugin: 'com.android.databinding'
	apply plugin: 'kotlin-android'

	android {
	compileSdkVersion 23
	buildToolsVersion "23.0.1"

	defaultConfig {
	applicationId "com.example.mvptestkotlin"

	import android.content.Context;
	import android.content.res.TypedArray;
	import android.graphics.Canvas;
	import android.graphics.Rect;
	import android.graphics.drawable.Drawable;
	import android.support.v7.widget.LinearLayoutManager;
	import android.support.v7.widget.RecyclerView;
	import android.util.AttributeSet;
	import android.view.View;

	if (result != null && result instanceof TreeMap<?, ?>) {
	TreeMap<String, Vector<AvailableDates>> ret = (TreeMap<String, Vector<AvailableDates>>) result;

	for (Entry<String, Vector<AvailableDates>> days : ret.entrySet()) {
	for (AvailableDates day : days.getValue()) {
	for (Period pr : day.getPeriods())
	if (
	((p.getEndTime().getTime() - appointment.getDuration() * 60000 >= pr.getStartTime().getTime())
	&& (p.getEndTime().getTime() <= day.getEndDate().getTime()))

	package the.app.util;

	import android.content.Context;
	import android.location.Location;
	import android.location.LocationManager;

	import com.feelflea.android.io.LocationService;

	import java.util.List;
	import java.util.concurrent.TimeUnit;

	public class RxSignupActivity extends ActionBarActivity {
	private static final Pattern emailPattern = Pattern.compile(
	"^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
	+ "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$");

	private EditText editTextUsername;
	private EditText editTextEmail;
	private Button buttonRegister;

	@Override