get component name via context extension

api/current.txt

@@ -23,6 +23,7 @@ package androidx.core.content {
 
   public final class ContextKt {
     ctor public ContextKt();
+    method public static android.content.ComponentName componentName(android.content.Context, String className);
     method public static void withStyledAttributes(android.content.Context, android.util.AttributeSet? set = "null", int[] attrs, @AttrRes int defStyleAttr = "0", @StyleRes int defStyleRes = "0", kotlin.jvm.functions.Function1<? super android.content.res.TypedArray,kotlin.Unit> block);
     method public static void withStyledAttributes(android.content.Context, @StyleRes int resourceId, int[] attrs, kotlin.jvm.functions.Function1<? super android.content.res.TypedArray,kotlin.Unit> block);
   }

src/androidTest/java/androidx/core/content/ContextTest.kt

@@ -16,9 +16,11 @@
 
 package androidx.core.content
 
+import android.content.ComponentName
 import android.content.ContextWrapper
 import android.support.test.InstrumentationRegistry
 import android.support.test.filters.SdkSuppress
+import androidx.core.TestActivity
 import androidx.core.ktx.test.R
 import androidx.core.getAttributeSet
 import org.junit.Assert.assertEquals
@@ -70,4 +72,18 @@ class ContextTest {
             assertTrue(getInt(R.styleable.SampleAttrs_sample, -1) != -1)
         }
     }
+
+    @Test fun componentName() {
+        val componentName = ComponentName(context, TestActivity::class.java)
+        context.componentName<TestActivity>().also {
+            assertEquals(componentName, it)
+        }
+    }
+
+    @Test fun componentNameViaClassName() {
+        val componentName = ComponentName(context, TestActivity::class.java)
+        context.componentName("androidx.core.TestActivity").also {
+            assertEquals(componentName, it)
+        }
+    }
 }

src/main/java/androidx/core/content/Context.kt

@@ -16,6 +16,7 @@
 
 package androidx.core.content
 
+import android.content.ComponentName
 import android.content.Context
 import android.content.res.TypedArray
 import android.util.AttributeSet
@@ -91,3 +92,9 @@ inline fun Context.withStyledAttributes(
         typedArray.recycle()
     }
 }
+
+/** Creates a [ComponentName] from the given [T]. */
+inline fun <reified T> Context.componentName() = ComponentName(this, T::class.java)
+
+/** Creates a [ComponentName] from the given [String]. */
+inline fun Context.componentName(className: String) = ComponentName(this, className)