Example of view related kotlin extension in android

ViewExtensions.kt

package com.tutorialforandroid.testing

import android.content.Intent
import android.net.Uri
import android.support.v4.app.Fragment
import android.support.v4.app.FragmentActivity
import android.support.v4.app.FragmentManager
import android.support.v7.app.AppCompatActivity
import com.tutorialforandroid.testing.ui.MainActivityUI

/**
 * Created by almondjoseph on 23/4/16.
 */

fun goToFragment(supportFragmentManager: FragmentManager, fragment: Fragment) {
    val fragmentTag = fragment.javaClass.simpleName
    val fragmentPopped = supportFragmentManager.popBackStackImmediate(fragmentTag, 0)

    if (!fragmentPopped && supportFragmentManager.findFragmentByTag(fragmentTag) == null) {
        supportFragmentManager
                .beginTransaction()
                .replace(MainActivityUI.FRAME_LAYOUT_ID, fragment, fragmentTag)
                .addToBackStack(fragment.javaClass.simpleName)
                .commit()
    }
}


fun AppCompatActivity.goToFragment(fragment: Fragment) {
    goToFragment(supportFragmentManager, fragment)
}


fun FragmentActivity.goToFragment(fragment: Fragment) {
    goToFragment(supportFragmentManager, fragment)
}


fun Fragment.gotoUrl(url: String) {
    val intent: Intent = Intent(Intent.ACTION_VIEW, Uri.parse(url));
    startActivity(intent);
}