Question

我有一个使用Android设备相机的应用程序。拍摄照片的活动无法旋转，仅以纵向显示。在大多数设备上，此代码可以正常工作：

int degrees = 0;
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;
         }
int result;
         if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
             result = (cameraInfo.orientation + degrees) % 360;
             result = (360 - result) % 360;  // compensate the mirror
         } else {  // back-facing
             result = (cameraInfo.orientation - degrees + 360) % 360;
         } camera.setDisplayOrientation(result);

但是在设备上（DMTECH 725H，7英寸平板电脑，只有前置摄像头），预览会颠倒显示。有任何想法如何解决吗？

Answer 1

试试这个：

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    boolean isLandscape = newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE;

    int degrees = 0;
    switch (mDisplay.getRotation()){
        case Surface.ROTATION_0:
            degrees = isLandscape? 0 : 90;
            break;
        case Surface.ROTATION_90:
            degrees = isLandscape? 0 : 270;
            break;
        case Surface.ROTATION_180:
            degrees = isLandscape? 180 : 270;
            break;
        case Surface.ROTATION_270:
            degrees = isLandscape? 180 : 90;
            break;
    }
    cameraManager.rotateDisplay(degrees, isLandscape);
}

Answer 2

如this support issue中所述，相机旋转错误的原因可能是传感器的方向不正常。您还应该使用camera2包而不是android.hardware.Camera。

Answer 3

这可能不是完美的解决方案。但请参考它，希望它适合你：）

android.hardware.Camera.setDisplayOrientation

http://developer.android.com/reference/android/hardware/Camera.Parameters.html

和

android.hardware.Camera.Parameters.setRotation

http://developer.android.com/reference/android/hardware/Camera.html

相机预览是颠倒的

3 个答案: