androidKotlin


Source link: https://github.com/yoavst/androidKotlin

Depracated - use Anko by jetbrains

Android Kotlin Extensions

A collection of Kotlin extensions for Android, based on KotlinAndroidLib and Android Kotlin Extensions.

Include this library in your project

Step 1. Add the JitPack repository to your build file

repositories {

maven {

 url "https://jitpack.io"

}
  
}

Step 2. Add the dependency in the form

dependencies {

 compile 'com.github.yoavst:androidKotlin:1.5.1'  
}

Activities & Services

Example: Start an Activity

Java

Intent intent = new Intent(this, SuperPowersActivity.class);
 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 startActivity(intent);

Kotlin

val flags = flags(Intent.FLAG_ACTIVITY_NEW_TASK, Intent.FLAG_ACTIVITY_CLEAR_TOP) start<SuperPowersActivity>(flags)

Example: Create an Intent

Java

Intent intent = new Intent(this, SuperPowersActivity.class);

Kotlin

val intent = intent<SuperPowersActivity>()

Api

Java

int sdk = Build.VERSION.SDK_INT; if (sdk >= Build.VERSION_CODES.LOLLIPOP) {

}
 if (sdk < Build.VERSION_CODES.LOLLIPOP) {

}
 if (sdk >= Build.VERSION_CODES.KITKAT) {

}
 if (sdk < Build.VERSION_CODES.KITKAT) {

}
 if (sdk >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {

}
 if (sdk < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {

}
 if (sdk >= X) {

}
 if (sdk < X) {

}

Kotlin

val sdk = currentVersion() if (lollipopOrNewer()) {

}
 if (beforeLollipop()) {

}
 if (kitkatOrNewer()) {

}
 if (beforeKitkat()) {

}
 if (icsOrNewer()) {

}
 if (beforeIcs()) {

}
 if (versionOrNewer(x)) {

}
 if (beforeVersion(x)) {

}

Async and main thread

Kotlin

async {
  
}
  mainThread {
  
}

Broadcast Receiver

Java

new BroadcastReceiver() {

 @Override
 public void onReceive(Context context,Intent intent) {

 
}

}
;

Kotlin

broadcastReceiver {
 context,intent -> 
}

Layout Inflation

Java

LayoutInflater layoutInflater = LayoutInflater.from(this);
 View awesomeView = layoutInflater.inflate(R.layout.my_awesome_layout, null);

Kotlin

val awesomeView = inflateLayout(R.layout.my_awesome_layout)

Logs

Example: Logging

Java

String tag = this.getClass().getName();
 Log.i(tag, "Howdy! Info");
 Log.d(tag, "Knock knock! Debug");
 Log.e(tag, "Grim, Error");
 Log.wtf(tag, "Damn! WTF");
 // Nope, not what you think. Refer the docs :P

Kotlin

i("Howdy! Info") d("Knock knock! Debug") e("Grim, Error") wtf("Damn! WTF")

Preferences

Example: Single Preference

Java

SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
 Editor editor = preferences.edit();
 editor.putBoolean("KEY_WALKTHROUGH_COMPLETE", complete);
 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD) {

editor.commit();
 
}
 else {

editor.apply();
 
}

Kotlin

getDefaultSharedPreferences().putBoolean("KEY_WALKTHROUGH_COMPLETE", complete)

Example: Bulk Preferences

Kotlin

getDefaultSharedPreferences()
.bulk()
.putBoolean("KEY_WALKTHROUGH_COMPLETE", complete)
.putString("KEY_LAST_USED", lastUsedIso8601Date)
.applyBulk()

Toasts

Example: Short Message

Java

Toast.makeText(this, R.string.welcome, Toast.LENGTH_SHORT).show();

Kotlin

toast(R.string.welcome)

Example: Long Message

Java

Toast.makeText(this, R.string.welcome, Toast.LENGTH_LONG).show();

Kotlin

longToast(R.string.welcome)

System Services

Example: System service on code

Java

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
 NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

Kotlin

val alarmManager = context.alarmManager() val notificationManager = context.notificationManager()

Example: System service field (lazy)

Java

AlarmManager alarmManager; NotificationManager notificationManager; public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 
}

Kotlin

val alarmManager: AlarmManager by systemService() val notificationManager: NotificationManager by systemService()

Resources

Example: Typeface from Assets

Java

AssetManager assetManager = getAssets();
 Typeface sourceSansPro = Typeface.createFromAsset(assetManager, "fonts/source-sans-pro.ttf");

Kotlin

val sourceSansPro = typefaceFromAssets("fonts/source-sans-pro.ttf")

Example: Get resources

Java

int number = getResources().getInteger(R.integer.number);
 int dimenPixelSize = getResources().getDimensionPixelSize(R.dimen.size);
 int color = getResources().getColor(R.color.red);
 int[] intArray = getResources().getIntArray(R.array.ids);
 String[] stringArray = getResources().getColor(R.array.options);
 Drawable drawable = getResources().getDrawable(R.drawable.background);

Kotlin

val number = intRes(R.integer.number) val dimenPixelSize = dimenRes(R.dimen.size) val color = colorRes(R.color.red) val intArray = intArrayRes(R.array.ids) val stringArray = stringArrayRes(R.array.options) val drawable = drawableRes(R.drawable.background)

Example: Get resources as field (lazy)

Kotlin

val text by stringResource(R.string.text) val number by intResource(R.integer.number) val dimenPixelSize by dimenResource(R.dimen.size) val color by colorResource(R.color.red) val intArray by intArrayResource(R.array.ids) val stringArray by stringArrayResource(R.array.options) val drawable by drawableResource(R.drawable.background)

Example: DP and PX converter

Kotlin

val px = 40.toPx(context) val dp = 180.toDp(activity)

More...

More extensions under development.

License

Copyright 2015 Yoav sternberg  Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License. You may obtain a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 

Resources

Shareable is a small android library to help implement direct share and social media actions into your android app. For example if you want to share something specifically to Twitter or Facebook.

The API is design to allow you to specify specific social channels to share to using the Builder design pattern. If the app is not available the default is to use all Intent.ACTION_SEND apps on the phone.

ColorPickerDialog is an Android Library providing color picker dialog for single color or multi color selection from the ArrayList of colors provided by developer.

A delightful progress animation that you'll fall in love with, very easily.

Play store downloads/updates app in sequence because of the performance issues but still there are the cases when you need to download/upload things in parallel like AppStore or WhatsApp.

Configurable custom crop widget for Android.

AndStatus is an Open Source low traffic social networking client with tree-like threaded conversations. It supports different Social networks, including GNU social (e.g. Quitter.se, LoadAverage, etc.), Twitter and Pump.io.

AndStatus can combine your feeds from all networks into one Timeline, and it allows you to read and post even when you are offline.

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