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OSSの動向を捉えた実装方針
wasabeef
DroidKaigi 2016
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About me
Daichi Furiya
wasabeef
@wasabeef_jp
CyberAgent, Inc.
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OSSの動向を捉えた実装方針?
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Research
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GitHub/trending
Android Weekly
Android Arsenal
Twitter
Research
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Introduction
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Languages
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Kotlin
Java
• RetroLambda
• Lightweight-Stream-API
• ThreeTen Android
Languages
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Kotlin
by JetBrains
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Kotlin 1.0
Java連携
…more
Kotlin
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RetroLambda
by Esko Luontola
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Lambda
Method Reference
RetroLambda
view.setOnClickListener(v -> {
finish();
});
view.setOnClickListener(this::something);
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Lightweight-Stream-API
by Victor Melnik
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Stream API
Lightweight-Stream-API
Stream.of(lines)
.map(str -> str.split(t))
.filter(arr -> arr.length == 2)
.map(arr -> new Word(arr[0], arr[1]))
.collect(Collectors.toList());
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Optional
Lightweight-Stream-API
Optional.ofNullable(getSupportActionBar())
.ifPresent(ab -> {
ab.setDisplayHomeAsUpEnabled(true);
ab.setHomeButtonEnabled(true);
});
Optional.ofNullable(i.getStringExtra(EXTRA_URI))
.map(Uri::parse)
.orElse(null);
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ThreeTen Android
by Jake Wharton
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JSR-310
ThreeTen Android
// Now
LocalDateTime.now();
// 2016.2.18 10:30:40
LocalDateTime.of(2016, 2, 18, 10, 30, 40);
// +1 truncated second
LocalDateTime.now()
.plusHours(1).truncatedTo(ChronoUnit.HOURS);
// Epoch
LocalDateTime.now()
.toInstant(ZoneOffset.UTC).toEpochMilli();
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Views
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Support Library
Android-ObservableScrollView
Calligraphy
florent37/ViewAnimator
View
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Support Library
by Google
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View (RecyclerView...etc
)
RenderScript
MultiDex
Annotations
Support Library
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Sample...
Support Library
compile 'com.android.support:support-v4:+'
compile 'com.android.support:appcompat-v7:+'
compile 'com.android.support:design:+'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:cardview-v7:+'
compile 'com.android.support:support-annotations:+'
compile ‘com.android.support:percent:+'
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Android
ObservableScrollView
by ksoichiro
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ScrollView , ListView,
RecyclerViewなどのスクロー
ル制御を監視
Android-ObservableScrollView
https://github.com/ksoichiro/Android-ObservableScrollView
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Calligraphy
by Christopher Jenkins
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Calligraphy
アプリ全体にFont適用
xmlでもjavaでも可
簡単
https://github.com/chrisjenx/Calligraphy
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CalligraphyConfig
Calligraphy
CalligraphyConfig.initDefault(new CalligraphyConfig.Builder()
.setDefaultFontPath("fonts/mplus-2p-regular.ttf")
.setFontAttrId(R.attr.fontPath)
.build();
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ViewAnimator
by Florent CHAMPIGNY
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ViewAnimator
AnimatorSet animSet = new AnimatorSet();
animSet.playTogether(
ObjectAnimator.ofFloat(image, View.TRANSLATION_Y, -1000,0),
ObjectAnimator.ofFloat(image, View.ALPHA, 0,1),
ObjectAnimator.ofFloat(text, View.TRANSLATION_X, -200,0)
);
animSet.setInterpolator(new DescelerateInterpolator());
animSet.setDuration(2000);
animSet.addListener(new AnimatorListenerAdapter() {
@Override public void onAnimationEnd(Animator animation) {
AnimatorSet anim = new AnimatorSet();
anim.playTogether(
ObjectAnimator.ofFloat(image, View.SCALE_X, 1f, 0.5f, 1f),
ObjectAnimator.ofFloat(image, View.SCALE_Y, 1f, 0.5f, 1f)
);
anim.setInterpolator(new AccelerateInterpolator());
anim.setDuration(1000);
anim.start();
}
});
animSet.start();
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ViewAnimator
ViewAnimator
.animate(image)
.translationY(-1000, 0)
.alpha(0, 1)
.andAnimate(text)
.dp().translationX(-200, 0)
.descelerate()
.duration(2000)
.thenAnimate(image)
.scale(1f, 0.5f, 1f)
.accelerate()
.duration(1000)
.start();
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DataBinding
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Android Data Binding
by Google
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xmlとjavaのBinding
Annotation Processing
たまにビルドエラーが出る..
Android Data Binding
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Android Data Binding
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Android Data Binding
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Android Data Binding
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Custom Setters
Android Data Binding
public final class ImageBindingAdapters {
@BindingAdapter({ "bind:image" })
public static void loadImage(ImageView view, String url) {
Glide.with(view.getContext().getApplicationContext())
.load(url)
.into(view);
}
}
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DataBindingUtil
Android Data Binding
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MainBinding binding =
DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.userName.setOnClickListener(v -> ...);
}
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Networking
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(Volley)
Retrofit + OkHttp
Networking
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Retrofit+OkHttp
by Square
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REST
RxJava support
Pluggable client
Converters(Gson, Wire...)
Retrofit+OkHttp
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Retrofit
Retrofit retrofit = new Retrofit.Builder()
.client(okHttpClient)
.baseUrl("https://api.github.com")
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.build();
GitHubService service = retrofit.create(GitHubService.class);
service.repos("wasabeef")
.subscribe(repo -> {
// ...
}, e -> {
Timber.w(e);
});
public interface GitHubService {
@GET(/users/{user}/repos)
Observable> repos(@Path(user) String user);
}
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JSON & ProtoBuf
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(Gson)
(Jackson)
(Moshi)
Wire
Serialisations
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Wire
by Square
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Protocol Buffers
okioを利用
Server/Clientで定義を共通化
Webからは扱いづらい
Wire
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Wire
syntax = "proto3";
package helloworld;
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
hello.proto
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Wire
Build
# java -jar wire-compiler-2.0.1-jar-with-dependencies.jar \
—proto_path=. \
—java_out=. hello.proto
Writing helloworld.HelloRequest to .
Writing helloworld.HelloReply to .
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Parcelables
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(android-parcelable-intellij-plugin)
Parceler
(Auto-Value-Parcel)
Icepick
Parcelables
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Parceler
by John Ericksen
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Annotation Processing
AutoValue
Parceler
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Parceler
@Parcel
public class User {
public String name;
public String thumbnail;
User() { }
}
// Wrap
Bundle bundle = new Bundle();
bundle.putParcelable("user", Parcels.wrap(user));
// Unwrap
User user =
Parcels.unwrap(getIntent().getParcelableExtra("user"));
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Icepick
by Frankie Sardo
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Simple
Icepick
public class MainActivity extends Activity {
@State String name;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Icepick.restoreInstanceState(this, savedInstanceState);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Icepick.saveInstanceState(this, outState);
}
}
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Image Loaders
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(Universal Image Loader)
Picasso
Glide
Fresco
Image Loaders
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Picasso
by Square
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Simple
Cache
Transformations
Debug
Picasso
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Simple
Picasso
Picasso.with(context)
.load(“http://i.imgur.com/DvpvklR.png”)
.setIndicatorsEnabled(true)
.into(imageView);
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Glide
by Google (unofficial)
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Glide
Bitmap Pool
Gif support
Thumbnail
Animation support
Transformations
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Simple
Glide
Glide.with(context)
.load(“http://i.imgur.com/DvpvklR.png”)
.crossFade()
.thumbnail(.1f)
.into(imageView);
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Picasso? Glide?
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Picasso? Glide?
http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en
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Picasso? Glide?
http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en
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Picasso? Glide?
http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en
Library's size
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Picasso? Glide?
http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en
Method Count
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Fresco
by Facebook
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Fresco
Ashmem heap
View
Gif support
Animation
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Fresco
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Fresco
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Effects
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Blurry
Android StackBlur
GPUImage for Android
Picasso/Glide Transformations
Effects
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Blurry
by Wasabeef
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Blurry
Blur
RenderScript
DownSampling
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Android StackBlur
by Enrique López Mañas
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Blur
RenderScript
NDK
Android StackBlur
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Android StackBlur
https://github.com/kikoso/android-stackblur
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Android StackBlur
https://github.com/kikoso/android-stackblur
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GPUImage for Android
by CyberAgent
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GPUImage
OpenGL ES
70 Filters
Tone Curve
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Picasso/Glide
Transformations
by Wasabeef
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Transformations
Picasso, Glide, Fresco
Crop
Blur
Color Filter
GPU Filter
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DI
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(AndroidAnnotations)
(Square/Dagger)
Google/Dagger
Butter Knife
DI
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Dagger2
by Google
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Annotation Processing
テスト・メンテナンス
Dagger2
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Butter Knife
by Jake Wharton
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View Injection
Butter Knife
public class MainActivity extends Activity {
@Bind(R.id.user_name) TextView userName;
@Bind(R.id.user_thumbnail) ImageView thumbnail;
@BindString(R.string.title) String title;
@BindDrawable(R.drawable.graphic) Drawable graphic;
@BindColor(R.color.red) int red;
@BindDimen(R.dimen.spacer) float spacer;
}
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OnClick, OnTextChange,
OnFocusChange...etc
Butter Knife
@OnClick(R.id.user_name)
public void click(View view) {
// ...
}
@OnClick({ R.id.user_name, R.id.user_thumbnail })
public void click(View door) {
// ...
}
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FRP
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RxJava
RxAndroid
(RxBinding)
(RxLifecycle)
FRP
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RxJava
by Netflix
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非同期、リスト操作が簡単
Retrolambdaがあると良い
Leakが怖い
Retrofitと併用
RxJava
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Sample
RxJava
Observable.just("Google", "Apple", "MicroSoft")
.map(String::toUpperCase)
.subscribe(name -> {
Timber.d("OnNext " + name);
}, throwable -> {
Timber.d("OnError");
});
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Sample
RxJava
Observable.just("Google", "Apple", "MicroSoft")
.map(String::toUpperCase)
.subscribe(name -> {
Timber.d("OnNext " + name);
}, throwable -> {
Timber.d("OnError");
});
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lift
compose
rxjava-extras (by Dave Moten)
RxJava
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RxAndroid
by RxAndroid authors
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Scheduler
RxAndroid
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Main Thread
RxAndroid
Observable.just("one", "two", "three", "four", "five")
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(/* an Observer */);
final Handler handler = new Handler();
Observable.just("one", "two", "three", "four", "five")
.subscribeOn(Schedulers.newThread())
.observeOn(HandlerScheduler.from(handler))
.subscribe(/* an Observer */)
Arbitrary Thread
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DB/ORM
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(ActiveAndroid)
Realm
(SQLBrite)
Android Orma
DB/ORM
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Realm
by Realm
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Not SQLite
RxJava?
Thread間の制約
Realm
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Android Orma
by gfx
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SQLite
Annotation Processing
RxJava
Semi-automatic migration
Android Orma
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Event Buses
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Otto
EventBus
(RxJava)
Event Buses
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Otto
by Square
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Deprecated!
Square
@Produceが少し便利
Otto
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EventBus
by greenrobot
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EventBus
EventBus3
Threading Support
Annotation Processing
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Debugging
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Timber
Hugo
Debugging
Stetho
Leak Canary
Takt
Crashlytics
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Timber
by Jake Wharton
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Logger
Timber.Treeを継承して追加する
ことで、出力先を自由に変えれる
Timber
if (BuildConfig.DEBUG) {
Timber.plant(new Timber.DebugTree());
} else {
Timber.plant(new CrashReportingTree());
}
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Hugo
by Jake Wharton
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AnnotationでMethod Callsを
Loggingできる
Hugo
@DebugLog
public String getName(String first, String last) {
return first + " " + last;
}
V/Example: ⇢ getName(first="Daichi", last="Furiya")
V/Example: ⇠ getName [0ms] = “Daichi Furiya"
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Stetho
by Facebook
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Chrome Developer Toolsを利
用して、Network、Dataの状
況の把握
Stetho-Realm (by uPhyca)
Stetho
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Stetho
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Stetho
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Stetho
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Leak Canary
by Square
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メモリリークを検出
Leak Canary
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Takt
by Wasabeef
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FPSを表示
Takt
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Crashlytics
by Twitter
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クラッシュの検出
リアルタイム分析
NDKサポート
Crashlytics
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Crashlytics
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Others
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Multi-Dex
ProGuard
Others
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MultiDex
by Google
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メソッド数の65k制限
最近は安定してきた
MultiDex
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Android Methods Count
MultiDex
https://plugins.jetbrains.com/plugin/8076
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ProGuard
by GuardSquare
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ソースコードの難読化
未使用なリソースの削除
難しい
ProGuard
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ProGuard
15M sample-production.apk
Total methods count: 99,280 (multidex enabled)
13M sample-production-proguard.apk
Total methods count: 54,977
Proguard あり
Proguard なし
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Conclusion
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Thank you.
twitter.com/wasabeef_jp
wasabeef.jp
github.com/wasabeef