CameraWrapper

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已于 2024-11-23 10:15:30 修改 · 302 阅读

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文章标签：

#android #Camera2 #kotlin

于 2024-11-23 09:55:58 首次发布

基于Camera2 API实现的摄像机预览功能封装,如果想要对实现进一步了解的话，可以观看Android 基于Camera2 API进行摄像机图像预览进行了解。

import android.Manifest
import android.annotation.SuppressLint
import android.app.Activity
import android.content.Context
import android.content.pm.PackageManager
import android.graphics.Point
import android.graphics.Rect
import android.graphics.SurfaceTexture
import android.hardware.camera2.CameraAccessException
import android.hardware.camera2.CameraCaptureSession
import android.hardware.camera2.CameraCharacteristics
import android.hardware.camera2.CameraDevice
import android.hardware.camera2.CameraManager
import android.hardware.camera2.CaptureRequest
import android.hardware.camera2.params.StreamConfigurationMap
import android.os.Handler
import android.os.HandlerThread
import android.util.Log
import android.util.Size
import android.view.Surface
import android.view.SurfaceHolder
import android.view.SurfaceView
import androidx.core.app.ActivityCompat
import java.util.Arrays
import kotlin.math.abs

/**
 * 需要权限<uses-permission android:name="android.permission.CAMERA" />
 */
class CameraWrapper(private var context:Context) {

    private val TAG = "CameraWrapper"

    private var cameraManager: CameraManager
    private var cameraDevice: CameraDevice? = null
    private var characteristics: CameraCharacteristics? = null
    private var session: CameraCaptureSession? = null

    //当前设备的相机列表
    private var cameraIds:Array<String>

    //默认启用的cameraId
    private var cameraId:String = "0"//默认前置

    private var previewView:SurfaceView? = null

    private  var encoderSurface: Surface? = null

    private var cameraThread:HandlerThread = HandlerThread("CameraThread")
    private var cameraHandler: Handler

    private var previewSize:Size? = Size(1280,720)

     init {
        cameraThread.start()
        cameraHandler = Handler(cameraThread.looper)
        cameraManager = context.getSystemService(Context.CAMERA_SERVICE) as CameraManager
        cameraIds = getCameraIds()