安卓截屏（截屏图片）_android 13图片截图权限

安卓截屏需要一个前台服务（需要权限）
开启前台服务需要显示一个通知（需要设置标题栏，文字等）
1.开启相关权限：

 <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
        <service
            android:name=".service.ScreenRecorderService"
            android:exported="false"
            android:foregroundServiceType="mediaProjection"
            tools:ignore="Instantiatable" />
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2.在Activity里判断权限&&启动服务并且使用MediaProjectionManager开启截屏：

3.在onActivityResult（）里面对图像数据进行处理：

相关代码如下：
Activity： //启动MediaService服务

    fun StartMediaService() {
        if (isstartservice) {
            startService(Intent(this, MediaService::class.java))
            isstartservice = false
        }
    }

    val REQUEST_MEDIA_PROJECTION = 10001
    private var mediaProjectionManager: MediaProjectionManager? = null

    // 申请截屏权限
    private fun getScreenShotPower() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            mediaProjectionManager =
                getSystemService(Context.MEDIA_PROJECTION_SERVICE) as MediaProjectionManager
            if (mediaProjectionManager != null) {
                val intent = mediaProjectionManager!!.createScreenCaptureIntent()
                startActivityForResult(intent, REQUEST_MEDIA_PROJECTION)
            }
        }
    }



    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    override fun onActivityResult(requestCode: Int, resultCode: Int, @Nullable data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == REQUEST_MEDIA_PROJECTION && data != null) {

//            val  mediaProjection = mediaProjectionManager!!.getMediaProjection(RESULT_OK, data)
//            val bitmap = screenShot(mediaProjection)
//            val bs = getBitmapByte(bitmap)
//            //对图片进行处理逻辑  例如可以保存本地、进行图片分享等等操作
//            Log.e("WWW", "EEE" + bitmap)
//            binding.img.setImageBitmap(bitmap)

 

        }
    }



处理图片：
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    fun screenShot(mediaProjection: MediaProjection): Bitmap? {
        val wm1 = this.windowManager
        val width = wm1.defaultDisplay.width
        val height = wm1.defaultDisplay.height
        Objects.requireNonNull(mediaProjection)
        @SuppressLint("WrongConstant") val imageReader: ImageReader =
            ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, 60)
        var virtualDisplay: VirtualDisplay? = null
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            virtualDisplay = mediaProjection.createVirtualDisplay(
                "screen",
                width,
                height,
                1,
                DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
                imageReader.getSurface(),
                null,
                null
            )
        }
        SystemClock.sleep(1000)
        //取最新的图片
        val image: Image = imageReader.acquireLatestImage()
        // Image image = imageReader.acquireNextImage();
        //释放 virtualDisplay,不释放会报错
        virtualDisplay!!.release()
        return image2Bitmap(image)
    }


    //将Image转为Bitmap
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    fun image2Bitmap(image: Image?): Bitmap? {
        if (image == null) {
            println("image 为空")
            return null
        }
        val width: Int = image.getWidth()
        val height: Int = image.getHeight()
        val planes: Array<Image.Plane> = image.planes
        val buffer: ByteBuffer = planes[0].buffer
        val pixelStride: Int = planes[0].pixelStride
        val rowStride: Int = planes[0].rowStride
        val rowPadding = rowStride - pixelStride * width
        val bitmap =
            Bitmap.createBitmap(width + rowPadding / pixelStride, height, Bitmap.Config.ARGB_8888)
        bitmap.copyPixelsFromBuffer(buffer)
        //截取图片
        // Bitmap cutBitmap = Bitmap.createBitmap(bitmap,0,0,width/2,height/2);
        //压缩图片
        // Matrix matrix = new Matrix();
        // matrix.setScale(0.5F, 0.5F);
        // System.out.println(bitmap.isMutable());
        // bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
        image.close()
        return bitmap
    }

    // 位图转 Byte
    private fun getBitmapByte(bitmap: Bitmap?): ByteArray {
        val out = ByteArrayOutputStream()
        // 参数1转换类型，参数2压缩质量，参数3字节流资源
        bitmap!!.compress(Bitmap.CompressFormat.PNG, 100, out)
        try {
            out.flush()
            out.close()
        } catch (e: IOException) {
            e.printStackTrace()
        }
        return out.toByteArray()
    }




Service:


package com.allynav.iefa.service

import android.R
import android.app.*
import android.content.Context
import android.content.Intent
import android.graphics.BitmapFactory
import android.os.Build
import android.os.IBinder
import androidx.core.app.NotificationCompat

/**
*@author  zd
*@time  2023/4/10  9:35
*@description : 
*
**/
class MediaService : Service() {
    private val NOTIFICATION_CHANNEL_ID = "com.tencent.trtc.apiexample.MediaService"
    private val NOTIFICATION_CHANNEL_NAME = "com.tencent.trtc.apiexample.channel_name"
    private val NOTIFICATION_CHANNEL_DESC = "com.tencent.trtc.apiexample.channel_desc"
    override fun onCreate() {
        super.onCreate()
        startNotification()
    }

    fun startNotification() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            //Call Start foreground with notification
            val notificationIntent = Intent(this, MediaService::class.java)
            val pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0)
            val notificationBuilder: NotificationCompat.Builder = NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
                    .setLargeIcon(
                        BitmapFactory.decodeResource(
                            getResources(),
                            R.drawable.alert_dark_frame
                        )
                    )
                    .setSmallIcon(R.drawable.alert_dark_frame)
                    .setContentTitle("Starting Service")
                    .setContentText("Starting monitoring service")
                    .setContentIntent(pendingIntent)
            val notification: Notification = notificationBuilder.build()
            val channel = NotificationChannel(
                NOTIFICATION_CHANNEL_ID,
                NOTIFICATION_CHANNEL_NAME,
                NotificationManager.IMPORTANCE_DEFAULT
            )
            channel.description = NOTIFICATION_CHANNEL_DESC
            val notificationManager =
                getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.createNotificationChannel(channel)
            startForeground(
                1,
                notification
            ) //必须使用此方法显示通知，不能使用notificationManager.notify，否则还是会报上面的错误
        }
    }

    override fun onBind(intent: Intent?): IBinder {
        throw UnsupportedOperationException("Not yet implemented")
    }
}
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使用完毕释放资源，关闭服务！