Android摄像头意图打开前置摄像头而不是后置摄像头

Question

我遇到了一个奇怪的问题，就是发送一个意向到手机相机来拍照。在我的手机上，xaomi 8运行良好，但当我在三星a51上安装应用程序时，intent会打开前置摄像头，而不是后置摄像头。我们的目标是在所有类型的手机上都能打开后置摄像头。这是我的代码

cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
if (cameraIntent.resolveActivity(getPackageManager()) != null) {
  startActivityForResult(cameraIntent, ApplicationConst.CodiceIntentConst.REQUEST_CAMERA_CODE);
}

我该怎么解决它呢？提前谢谢你

Answer 1

以下代码适用于Samsung A51和Pixel 2XL

fun updateIntentForCameraFacing(cameraIntent: Intent, frontFacing: Boolean){
    if(Build.VERSION.SDK_INT < Build.VERSION_CODES.O){
        if(frontFacing)
            cameraIntent.putExtra("android.intent.extras.CAMERA_FACING", CameraCharacteristics.LENS_FACING_BACK)
        else
            cameraIntent.putExtra("android.intent.extras.CAMERA_FACING", CameraCharacteristics.LENS_FACING_FRONT)

    }
    else if(frontFacing){
        cameraIntent.putExtra("android.intent.extras.CAMERA_FACING", CameraCharacteristics.LENS_FACING_BACK)
        cameraIntent.putExtra("android.intent.extra.USE_FRONT_CAMERA", true)

        //samsung
        cameraIntent.putExtra("camerafacing", "front")
        cameraIntent.putExtra("previous_mode", "front")
    }
    else{
        cameraIntent.putExtra("android.intent.extras.CAMERA_FACING", CameraCharacteristics.LENS_FACING_FRONT)
        cameraIntent.putExtra("android.intent.extra.USE_FRONT_CAMERA", false)

        //samsung
        cameraIntent.putExtra("camerafacing", "rear")
        cameraIntent.putExtra("previous_mode", "rear")
    }
}

Answer 2

您可以尝试以下代码来启动camera intent：

MediaStore.ACTION_IMAGE_CAPTURE_SECURE