kotlin-extensions
Usage
Database
Before:
db.beginTransaction();
try {
db.delete("users", "first_name = ?", new String[] {
"Andrew"
}
);
db.setTransactionSuccessful();
}
finally {
db.endTransaction()
}
or
Databases.from(db).inTransaction(it -> {
it.delete("users", "first_name = ?", new String[] {
"Andrew"
}
);
}
);
After:
db.inTransation {
delete("users", "first_name = ?", arrayOf("Andrew"))
}
Before:
String firstName = cursor.getString(cursor.getColumnIndexOrThrow("first_name"));
After:
val firstName = cursor.getString("first_name");
Before:
String firstName = null; int firstNameColumnIndex = cursor.getColumnIndexOrThrow("first_name");
if (!cursor.isNull(firstNameColumnIndex)) {
firstName = cursor.getString(firstNameColumnIndex);
}
firstNameView.setText(firstName != null ? firstName : "Andrew");
After:
val firstName = cursor.getStringOrNull("first_name") firstNameView.setText(firstName ?: "Andrew")SharedPreferences
Before:
SharePreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
SharePreferences.Editor editor = prefs.edit();
editor.putString("name", "Andrew Chen");
editor.putInt("age", 18, 14);
editor.apply();
After:
User(context).edit {
name = "Andrew Chen"
age = "18"
}
public class User(context: Context) : Preferences(context) {
var name: String by Preference()
var age: Int by Preference(default = 14)
}
or
User user = User(context) user.name = "Andrew Chen" user.age = 18 user.apply()Bonus - SharedPreferences Extension:
Before:
SharedPreferences.Editor editor = prefs.edit();
editor.putString("first_name", "Andrew");
editor.putString("last_name", "Chen");
editor.remove("age");
editor.apply();
or
SharedPreferencesUtils.from(prefs).apply(editor -> {
editor.putString("first_name", "Andrew");
editor.putString("last_name", "Chen");
editor.remove("age");
}
);
After:
prefs.edit {
putString("first_name", "Andrew")
putString("last_name", "Chen")
remove("age")
}
System Services
Before:
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
After:
val notificationManager = context.getNotificationManager()Notification
Before:
Notification notification = new NotificationCompat.Builder(context)
.setContentTitle("Hello")
.setSubText("World")
.build();
After:
val notification = Notification.build(context) {
setContentTitle("Hello")
setSubText("World")
}
Query
Math
Import from MichaelRocks/MathExtensions.kt
ThreeTen Backport (JSR-310)
LocalDateTime.now().toDate()new Date().toLocalDateTime()View
view.fadeOut()view.fadeIn()for (view in views.children())if (view in views) {
// ..
}
views += viewviews -= viewviews.forEach {
}
views.filter {
}
Misc
Installation
jitpack:
repositories {
// ...
maven {
url "https://jitpack.io"
}
}
dependencies {
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-android-sharedpreferences:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-android-database:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-android-system-services:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-android-notification:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-math:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-threetenbp:-SNAPSHOT'
compile 'com.github.yongjhih.kotlin-extensions:kotlinx-android-view:-SNAPSHOT'
}
jcenter (not ready yet):
dependencies {
compile 'com.infstory:kotlinx-android-sharedpreferences:1.0.0'
compile 'com.infstory:kotlinx-android-database:1.0.0'
compile 'com.infstory:kotlinx-android-system-services:1.0.0'
compile 'com.infstory:kotlinx-android-notification:1.0.0'
compile 'com.infstory:kotlinx-math:1.0.0'
compile 'com.infstory:kotlinx-android-view:1.0.0'
}
License
Copyright 2015 8tory, Inc. 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.