안드로이드 앱 개발 연습 - 10 | Camera & Gallery (with Permission)

Camera & Gallery (with Permission)

build.gradle (:app)

...
android {
    buildFeatures {
        viewBinding true
    }
    ...
}

dependencies {
    implementation "androidx.activity:activity-ktx:1.3.1"
    implementation "androidx.fragment:fragment-ktx:1.3.1"
    ...
}

MainActivity.kt

class MainActivity : AppCompatActivity() {
    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }

    lateinit var cameraPermission: ActivityResultLauncher<String> // Camera Permission
    lateinit var storagePermission: ActivityResultLauncher<String> // Storage Permission
    lateinit var cameraLauncher: ActivityResultLauncher<Uri> // Call Camera Application
    lateinit var galleryLauncher: ActivityResultLauncher<String> // Call Gallery Application

    var photoUri: Uri? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)

        storagePermission = registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
            if (isGranted) {
                setViews()
            } else {
                Toast.makeText(baseContext, "Permission must be approved", Toast.LENGTH_SHORT).show()
                finish()
            }
        }
        cameraPermission = registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted ->
            if (isGranted) {
                openCamera()
            } else {
                Toast.makeText(baseContext, "Permission must be approved", Toast.LENGTH_SHORT).show()
            }
        }

        cameraLauncher = registerForActivityResult(ActivityResultContracts.TakePicture()) { isSuccess ->
            if (isSuccess) {
                binding.imageView.setImageURI(photoUri)
            }
        }
        galleryLauncher = registerForActivityResult(ActivityResultContracts.GetContent()) { uri ->
            binding.imageView.setImageURI(uri)
        }

        storagePermission.launch(Manifest.permission.WRITE_EXTERNAL_STORAGE)
    }

    private fun setViews() {
        binding.btnCamera.setOnClickListener {
            cameraPermission.launch(Manifest.permission.CAMERA)
        }
        binding.btnGallery.setOnClickListener {
            openGallery()
        }
    }

    private fun openCamera() {
        val photoFile = File.createTempFile("IMG_", ".jpg", getExternalFilesDir(Environment.DIRECTORY_PICTURES))
        photoUri = FileProvider.getUriForFile(this, "${packageName}.provider", photoFile)
        cameraLauncher.launch(photoUri)
    }

    private fun openGallery() {
        galleryLauncher.launch("image/*")
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pokycookie.camera">

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature android:name="android.hardware.camera" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="CAMERA"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Camera">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>
    </application>

</manifest>

file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-path
        name="my_images"
        path="Android/data/com.pokycookie.camera/files/Pictures" />
</paths>