[#9] cameraX를 이용한 기본 카메라 띄우기

MyApplication/app/src/main/java/com/example/myapplication/ui/mediapipe/MediaPipeActivity.kt

@@ -1,10 +1,85 @@
 package com.example.myapplication.ui.mediapipe
 
+import android.Manifest
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.SurfaceTexture
+import android.os.Bundle
+import android.util.Log
+import android.view.SurfaceView
+import android.view.View
+import androidx.camera.core.CameraSelector
+import androidx.camera.core.Preview
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
 import com.example.myapplication.R
 import com.example.myapplication.databinding.ActivityMediapipeBinding
 import com.example.myapplication.ui.base.BaseActivity
 
-class MediaPipeActivity: BaseActivity<ActivityMediapipeBinding>() {
+
+class MediaPipeActivity : BaseActivity<ActivityMediapipeBinding>() {
     override val layoutId: Int = R.layout.activity_mediapipe
 
+
+    private var previewFrameTexture: SurfaceTexture? = null
+    private var previewDisplayView: SurfaceView? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        if (checkPermission()) {
+            startCamera()
+        } else {
+            ActivityCompat.requestPermissions(this, PERMISSIONS, REQUEST_CODE_PERMISSIONS)
+        }
+        previewDisplayView = SurfaceView(this)
+        setupPreviewDisplayView();
+    }
+
+    private fun checkPermission() = PERMISSIONS.all {
+        ContextCompat.checkSelfPermission(baseContext, it) == PackageManager.PERMISSION_GRANTED
+    }
+
+    override fun onRequestPermissionsResult(
+        requestCode: Int,
+        permissions: Array<out String>,
+        grantResults: IntArray
+    ) {
+        Log.d("zero", "requestCode : $requestCode , permission : $permissions")
+    }
+
+    private fun startCamera() {
+        val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
+
+        cameraProviderFuture.addListener({
+            val cameraProvider = cameraProviderFuture.get()
+
+            val preview = Preview.Builder()
+                .build()
+                .also {
+                    it.setSurfaceProvider(binding.viewFinder.surfaceProvider)
+                }
+
+            val cameraSelector = CameraSelector.DEFAULT_FRONT_CAMERA
+
+            try {
+                cameraProvider.unbindAll()
+                cameraProvider.bindToLifecycle(this, cameraSelector, preview)
+            } catch (e: Exception) {
+                Log.e("startCamera", "use case binding failed")
+            }
+
+        }, ContextCompat.getMainExecutor(this))
+    }
+
+    private fun setupPreviewDisplayView() {
+        previewDisplayView!!.visibility = View.GONE
+    }
+
+    companion object {
+        fun newIntent(context: Context) = Intent(context, MediaPipeActivity::class.java)
+        private val PERMISSIONS = arrayOf(Manifest.permission.CAMERA)
+        private const val REQUEST_CODE_PERMISSIONS = 100
+    }
 }

MyApplication/app/src/main/res/layout/activity_mediapipe.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <data>
 
@@ -8,9 +9,18 @@
             type="com.example.myapplication.ui.mediapipe.MediaPipeViewModel" />
     </data>
 
+
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
+        <androidx.camera.view.PreviewView
+            android:id="@+id/viewFinder"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 </layout>

MyApplication/app/src/main/res/layout/preview_display_layout.xml

@@ -1,6 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/preview_display_layout"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+    <TextView
+        android:id="@+id/no_camera_access_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:text="적당한 텍스트"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+    </TextView>
 </androidx.constraintlayout.widget.ConstraintLayout>