CameraX获取摄像头YUV数据

添加依赖

def camerax_version = "1.0.0-beta07"
implementation "androidx.camera:camera-camera2:$camerax_version"
implementation "androidx.camera:camera-lifecycle:$camerax_version"
implementation "androidx.camera:camera-view:1.0.0-alpha14"

声明权限

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

预览布局

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><androidx.camera.view.PreviewViewandroid:id="@+id/previewView"android:layout_width="match_parent"android:layout_height="match_parent" /></FrameLayout>

代码部署

package com.melon.camerademo;import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.camera.core.CameraSelector;
import androidx.camera.core.ImageAnalysis;
import androidx.camera.core.ImageCapture;
import androidx.camera.core.ImageProxy;
import androidx.camera.core.Preview;
import androidx.camera.lifecycle.ProcessCameraProvider;
import androidx.camera.view.PreviewView;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;import com.google.common.util.concurrent.ListenableFuture;import java.nio.ByteBuffer;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;public class MyActivity extends AppCompatActivity {private static final String TAG = "MyActivity";private static final int CAMERA_REQUEST_CODE = 100;private static final CameraSelector MY_CAMERA = CameraSelector.DEFAULT_BACK_CAMERA;private PreviewView mPreviewView;private ImageCapture mImageCapture;ExecutorService mCameraExecutor = Executors.newSingleThreadExecutor();@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();//启动摄像头startCamera();}private void initView() {mPreviewView = findViewById(R.id.previewView);}private void startCamera() {if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {Toast.makeText(this, "没有摄像头权限", Toast.LENGTH_LONG).show();Log.e(TAG, "没有摄像头权限");//权限申请ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, CAMERA_REQUEST_CODE);return;}Log.d(TAG, "有了摄像头权限");ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);cameraProviderFuture.addListener(new Runnable() {@Overridepublic void run() {try {ProcessCameraProvider cameraProvider = cameraProviderFuture.get();Preview preview = new Preview.Builder().build();preview.setSurfaceProvider(mPreviewView.createSurfaceProvider());mImageCapture = new ImageCapture.Builder().build();//图像分析ImageAnalysis imageAnalyzer = new ImageAnalysis.Builder().build();imageAnalyzer.setAnalyzer(mCameraExecutor, new ImageAnalysis.Analyzer() {@Overridepublic void analyze(@NonNull ImageProxy image) {// 分析ByteBuffer byteBuffer = image.getPlanes()[0].getBuffer();int pixelStride = image.getPlanes()[0].getPixelStride();int rowStride = image.getPlanes()[0].getRowStride();ByteBuffer byteBuffer1 = image.getPlanes()[1].getBuffer();int pixelStride1 = image.getPlanes()[1].getPixelStride();int rowStride1 = image.getPlanes()[1].getRowStride();ByteBuffer byteBuffer2 = image.getPlanes()[2].getBuffer();int pixelStride2 = image.getPlanes()[2].getPixelStride();int rowStride2 = image.getPlanes()[2].getRowStride();int rotationDegrees = image.getImageInfo().getRotationDegrees();int format = image.getFormat(); //CameraX默认出图格式：YUV_420_888  YYYY UV VU，数据分别在image.getPlanes()[0]，image.getPlanes()[1]，image.getPlanes()[2]中int width = image.getWidth();int height = image.getHeight();Log.d(TAG, "capacity: " + byteBuffer.capacity()+ ", pixelStride: " + pixelStride+ ", rowStride: " + rowStride+ ", capacity1: " + byteBuffer1.capacity()+ ", pixelStride1: " + pixelStride1+ ", rowStride1: " + rowStride1+ ", capacity2: " + byteBuffer2.capacity()+ ", pixelStride2: " + pixelStride2+ ", rowStride2: " + rowStride2+ ", rotationDegrees: " + rotationDegrees+ ", format: " + format+ ", width: " + width+ ", height: " + height);image.close();}});cameraProvider.unbindAll();cameraProvider.bindToLifecycle(MyActivity.this, MY_CAMERA, preview, mImageCapture, imageAnalyzer);} catch (Exception e) {Log.e(TAG, "error: " + e.getMessage());}}}, ContextCompat.getMainExecutor(this));}}

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