Determine the rotation to apply for the preview for a given camera - Android android.hardware

Android examples for android.hardware:Camera Preview

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Description

Determine the rotation to apply for the preview for a given camera

Demo Code

import android.app.Activity;
import android.hardware.Camera;
import android.view.Surface;

public class Main{

    /**//from w  w w . j  a  v a 2s  .  c o m
     * Determine the rotation to apply for the preview for a given camera
     * @param mirror whether to account for profile camera mirroring or not
     */
    public static int getRotationDegrees(Activity activity, int cameraId,
            boolean mirror) {
        int rotation = activity.getWindowManager().getDefaultDisplay()
                .getRotation();
        int degrees = 0;

        switch (rotation) {
        case Surface.ROTATION_0:
            degrees = 0;
            break;
        case Surface.ROTATION_90:
            degrees = 90;
            break;
        case Surface.ROTATION_180:
            degrees = 180;
            break;
        case Surface.ROTATION_270:
            degrees = 270;
            break;
        }

        android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
        android.hardware.Camera.getCameraInfo(cameraId, info);

        if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {

            degrees = (info.orientation + degrees) % 360;
            // compensate for mirrored image, useful for previews on front facing cameras
            if (mirror) {
                degrees = (360 - degrees) % 360;
            }
        } else {
            degrees = (info.orientation - degrees + 360) % 360;
        }

        return degrees;
    }

}

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