120 lines
4.4 KiB
Kotlin
120 lines
4.4 KiB
Kotlin
package com.example.defenseapplication.login
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import android.Manifest
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import android.content.pm.PackageManager
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import android.os.Bundle
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import android.widget.Toast
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import androidx.annotation.OptIn
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import androidx.appcompat.app.AppCompatActivity
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import androidx.camera.core.CameraSelector
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import androidx.camera.core.ExperimentalGetImage
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import androidx.camera.core.ImageAnalysis
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import androidx.camera.core.Preview
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import androidx.camera.lifecycle.ProcessCameraProvider
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import androidx.core.app.ActivityCompat
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import androidx.core.content.ContextCompat
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import com.example.defenseapplication.databinding.FaceVerificationActivityBinding
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import com.example.defenseapplication.view.FaceAnalyzer
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import com.google.mlkit.vision.face.FaceDetection
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import com.google.mlkit.vision.face.FaceDetectorOptions
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import com.gyf.immersionbar.ImmersionBar
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import java.util.concurrent.ExecutorService
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import java.util.concurrent.Executors
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//人脸采集
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class FaceVerificationActivity : AppCompatActivity() {
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private lateinit var binding: FaceVerificationActivityBinding
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private lateinit var cameraExecutor: ExecutorService
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private var faceDetector: com.google.mlkit.vision.face.FaceDetector? = null
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companion object {
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private const val REQUEST_CAMERA_PERMISSION = 100
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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// 使用标准 ViewBinding
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binding = FaceVerificationActivityBinding.inflate(layoutInflater)
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setContentView(binding.root)
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ImmersionBar.with(this)
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.statusBarDarkFont(true)
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.titleBar(binding.topContainer)
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.init()
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binding.backIcon.setOnClickListener {
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finish()
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}
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// 初始化人脸检测器（选项可自行调整）
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val options = FaceDetectorOptions.Builder()
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.setPerformanceMode(FaceDetectorOptions.PERFORMANCE_MODE_FAST)
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.setContourMode(FaceDetectorOptions.CONTOUR_MODE_NONE)
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.setLandmarkMode(FaceDetectorOptions.LANDMARK_MODE_NONE)
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.build()
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faceDetector = FaceDetection.getClient(options)
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cameraExecutor = Executors.newSingleThreadExecutor()
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// 检查并请求权限
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checkCameraPermissionAndStart()
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}
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private fun checkCameraPermissionAndStart() {
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if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
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== PackageManager.PERMISSION_GRANTED) {
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startCamera()
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} else {
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ActivityCompat.requestPermissions(
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this,
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arrayOf(Manifest.permission.CAMERA),
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REQUEST_CAMERA_PERMISSION
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)
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}
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}
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@OptIn(ExperimentalGetImage::class)
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private fun startCamera() {
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val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
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cameraProviderFuture.addListener({
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val cameraProvider = cameraProviderFuture.get()
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// 预览用例
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val preview = Preview.Builder().build().also {
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it.setSurfaceProvider(binding.previewView.surfaceProvider)
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}
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// 分析用例（人脸检测）
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val imageAnalysis = ImageAnalysis.Builder()
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.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
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.build()
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imageAnalysis.setAnalyzer(cameraExecutor, FaceAnalyzer(faceDetector, binding.overlay))
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// 选择前置摄像头
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val cameraSelector = CameraSelector.DEFAULT_FRONT_CAMERA
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// 绑定到生命周期
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cameraProvider.bindToLifecycle(this, cameraSelector, preview, imageAnalysis)
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}, ContextCompat.getMainExecutor(this))
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}
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override fun onRequestPermissionsResult(
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requestCode: Int,
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permissions: Array<out String>,
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grantResults: IntArray
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) {
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super.onRequestPermissionsResult(requestCode, permissions, grantResults)
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if (requestCode == REQUEST_CAMERA_PERMISSION) {
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if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
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startCamera()
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} else {
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Toast.makeText(this, "需要相机权限才能进行人脸验证", Toast.LENGTH_SHORT).show()
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finish()
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}
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}
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}
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override fun onDestroy() {
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super.onDestroy()
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cameraExecutor.shutdown()
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faceDetector?.close()
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}
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} |