Add Android

android/src/main/java/com/mrousavy/camera/CameraView+Focus.kt

@@ -0,0 +1,26 @@
+package com.cuvent.experiences.friends.camera
+
+import androidx.camera.core.FocusMeteringAction
+import androidx.camera.core.SurfaceOrientedMeteringPointFactory
+import com.facebook.react.bridge.ReadableMap
+import kotlinx.coroutines.guava.await
+import java.util.concurrent.TimeUnit
+
+suspend fun CameraView.focus(pointMap: ReadableMap) {
+    val cameraControl = camera?.cameraControl ?: throw CameraNotReadyError()
+    if (!pointMap.hasKey("x") || !pointMap.hasKey("y")) {
+        throw InvalidTypeScriptUnionError("point", pointMap.toString())
+    }
+
+    val dpi = resources.displayMetrics.density
+    val x = pointMap.getDouble("x") * dpi
+    val y = pointMap.getDouble("y") * dpi
+
+    val factory = SurfaceOrientedMeteringPointFactory(this.width.toFloat(), this.height.toFloat())
+    val point = factory.createPoint(x.toFloat(), y.toFloat())
+    val action = FocusMeteringAction.Builder(point, FocusMeteringAction.FLAG_AF or FocusMeteringAction.FLAG_AE)
+            .setAutoCancelDuration(5, TimeUnit.SECONDS) // auto-reset after 5 seconds
+            .build()
+
+    cameraControl.startFocusAndMetering(action).await()
+}