camera2 手动对焦，android

Question

我正在寻找 android 中 camera2 中手动对焦的示例。我试图获得如下所示的最小焦距和可用焦距，但没有帮助。如何控制焦距？

float minimumLens = characteristics.get(CameraCharacteristics.LENS_INFO_MINIMUM_FOCUS_DISTANCE);

float[] lensDistances = characteristics.get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS);&nbsp;

我需要用seekbar来控制它。提前致谢。

Answer 1

 switch (seekBar.getId()) {
            case R.id.sb_focus:
                float minimumLens = mCameraCharacteristics.get(CameraCharacteristics.LENS_INFO_MINIMUM_FOCUS_DISTANCE);
                float num = (((float) i) * minimumLens / 100);
                mPreviewBuilder.set(CaptureRequest.LENS_FOCUS_DISTANCE, num);
                int showNum = (int) num;
                mSeekBarTextView.setText("focus：" + showNum);
                break;}

注意，CONTROL_AF_MODE应该关闭。
https://github.com/pinguo-yuyidong/Camera2/blob/master/app/src/main/java/us/yydcdut/androidltest/ui/DisplayFragment.java
第 1109 行中的代码

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