要解决“Android ML Kit图像标签器在Camerax分析器中出现内部错误”的问题,可以尝试以下步骤:
implementation 'com.google.mlkit:image-labeling:17.0.0'
import androidx.camera.core.ImageAnalysis
import androidx.camera.core.ImageProxy
import com.google.mlkit.vision.common.InputImage
import com.google.mlkit.vision.label.ImageLabeler
import com.google.mlkit.vision.label.defaults.ImageLabelerOptions
class MyImageAnalyzer : ImageAnalysis.Analyzer {
private val imageLabeler: ImageLabeler by lazy {
val options = ImageLabelerOptions.Builder()
.setConfidenceThreshold(0.7f)
.build()
ImageLabeler.getClient(options)
}
override fun analyze(imageProxy: ImageProxy) {
val mediaImage = imageProxy.image
if (mediaImage != null) {
val image = InputImage.fromMediaImage(mediaImage, imageProxy.imageInfo.rotationDegrees)
imageLabeler.process(image)
.addOnSuccessListener { labels ->
// 处理成功的回调
for (label in labels) {
val text = label.text
val confidence = label.confidence
// 在这里处理标签和置信度
}
}
.addOnFailureListener { exception ->
// 处理失败的回调
exception.printStackTrace()
}
.addOnCompleteListener {
imageProxy.close()
}
}
}
}
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.camera.core.CameraSelector
import androidx.camera.core.ImageAnalysis
import androidx.camera.core.Preview
import androidx.camera.lifecycle.ProcessCameraProvider
import androidx.core.content.ContextCompat
import com.google.mlkit.common.MlKitException
import com.google.mlkit.vision.common.InputImage
import com.google.mlkit.vision.label.ImageLabeler
import com.google.mlkit.vision.label.ImageLabelerOptions
import kotlinx.android.synthetic.main.activity_main.*
import java.util.concurrent.Executors
class MainActivity : AppCompatActivity() {
private lateinit var imageAnalyzer: ImageAnalysis.Analyzer
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
imageAnalyzer = MyImageAnalyzer()
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener(
{
val cameraProvider = cameraProviderFuture.get()
val preview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(viewFinder.surfaceProvider)
}
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
val imageAnalysis = ImageAnalysis.Builder()
.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
.build()
.also {
it.setAnalyzer(Executors.newSingleThreadExecutor(), imageAnalyzer)
}
try {
cameraProvider.unbindAll()
cameraProvider.bindToLifecycle(
this,
cameraSelector,
preview,
imageAnalysis
)
} catch (exc: Exception) {
exc.printStackTrace()
}
},
ContextCompat.getMainExecutor(this)
)
}
}
通过以上步骤,你应该能够解决“Android ML Kit图像标签器在Camerax分析器中出现内部错误”的问题,并成功使用图像标签器分析相机捕捉到的每个帧。