java - 前置摄像头无法连接摄像头服务？

Question

我正在使用 Camera Api，因为当我启动应用程序时，它会显示后置摄像头，它工作正常，但是当我单击前置摄像头按钮时，它会出现运行时异常无法连接摄像头服务

in  camera = Camera.open(cameraID);

in front camera button code :

if (cameraID == Camera.CameraInfo.CAMERA_FACING_BACK)
            {
                Toast.makeText(getApplicationContext(), "Front Camera", Toast.LENGTH_LONG).show();

                cameraID = Camera.CameraInfo.CAMERA_FACING_FRONT;

            }
            else if (cameraID == Camera.CameraInfo.CAMERA_FACING_FRONT)

            {
                Toast.makeText(getApplicationContext(), "Back Camera", Toast.LENGTH_LONG).show();

                cameraID = Camera.CameraInfo.CAMERA_FACING_BACK;

            }

            Intent intent = getIntent();

            finish();

            startActivity(intent);

Answer 1

您是否授予前置摄像头权限:

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature
        android:name="android.hardware.camera"
        android:required="false" />
<uses-feature
        android:name="android.hardware.camera.front"
        android:required="false" />
<uses-feature android:name="android.hardware.camera.autofocus" />

检查这个link1 & link2一次。