colinrtwhite · April 9, 2020 05:14 · Sep 23, 2018 · Sep 14, 2018
diff --git a/Extensions.kt b/Extensions.kt
@@ -1,15 +1,15 @@
 fun <T> unsafeLazy(initializer: () -> T) = lazy(LazyThreadSafetyMode.NONE, initializer)
 
-@JvmOverloads @Dimension(unit = Dimension.DP) fun Number.toDp(
+@JvmOverloads @Dimension(unit = Dimension.PX) fun Number.dpToPx(
     metrics: DisplayMetrics = Resources.getSystem().displayMetrics
 ): Float {
-    return toFloat() / metrics.density
+    return toFloat() * metrics.density
 }
 
-@JvmOverloads @Dimension(unit = Dimension.PX) fun Number.toPx(
+@JvmOverloads @Dimension(unit = Dimension.DP) fun Number.pxToDp(
     metrics: DisplayMetrics = Resources.getSystem().displayMetrics
 ): Float {
-    return toFloat() * metrics.density
+    return toFloat() / metrics.density
 }
 
 @ColorInt fun Context.getColorCompat(@ColorRes colorRes: Int): Int {

diff --git a/Extensions.kt b/Extensions.kt
@@ -0,0 +1,73 @@
+fun <T> unsafeLazy(initializer: () -> T) = lazy(LazyThreadSafetyMode.NONE, initializer)
+
+@JvmOverloads @Dimension(unit = Dimension.DP) fun Number.toDp(
+    metrics: DisplayMetrics = Resources.getSystem().displayMetrics
+): Float {
+    return toFloat() / metrics.density
+}
+
+@JvmOverloads @Dimension(unit = Dimension.PX) fun Number.toPx(
+    metrics: DisplayMetrics = Resources.getSystem().displayMetrics
+): Float {
+    return toFloat() * metrics.density
+}
+
+@ColorInt fun Context.getColorCompat(@ColorRes colorRes: Int): Int {
+    return ContextCompat.getColor(this, colorRes)
+}
+
+fun Context.getDrawableCompat(@DrawableRes drawableRes: Int): Drawable {
+    return AppCompatResources.getDrawable(this, drawableRes)!!
+}
+
+@CheckResult fun Drawable.tint(@ColorInt color: Int): Drawable {
+    val tintedDrawable = DrawableCompat.wrap(this).mutate()
+    DrawableCompat.setTint(tintedDrawable, color)
+    return tintedDrawable
+}
+
+@CheckResult fun Drawable.tint(context: Context, @ColorRes color: Int): Drawable {
+    return tint(context.getColorCompat(color))
+}
+
+fun Context.toActivity(): Activity? {
+    var context = this
+    while (context is ContextWrapper) {
+        if (context is Activity) {
+            return context
+        }
+        context = context.baseContext
+    }
+    return null
+}
+
+fun Context.openWebPage(url: String): Boolean {
+    // Format the URI properly.
+    val uri = url.toWebUri()
+
+    // Try using Chrome Custom Tabs.
+    try {
+        val intent = CustomTabsIntent.Builder()
+            .setToolbarColor(getColorCompat(R.color.primary))
+            .setShowTitle(true)
+            .build()
+        intent.launchUrl(this, uri)
+        return true
+    } catch (ignored: Exception) {}
+
+    // Fall back to launching a default web browser intent.
+    try {
+        val intent = Intent(Intent.ACTION_VIEW, uri)
+        if (intent.resolveActivity(packageManager) != null) {
+            startActivity(intent)
+            return true
+        }
+    } catch (ignored: Exception) {}
+
+    // We were unable to show the web page.
+    return false
+}
+
+fun String.toWebUri(): Uri {
+    return (if (startsWith("http://") || startsWith("https://")) this else "https://$this").toUri()
+}