Android N Developer Preview：相机支持取第三个值

Question

我有一台 Nexus 6P。我正在调查为什么 OpenCamera has stopped working on Android N Developer Preview (I'm not a developer, just a user). I have found the following piece of code that might be causing the problem: CameraControllerManager2.java:62

我创建了一个新的Android项目，并添加了以下功能：

...
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CameraMetadata;
...
public class MainActivity extends AppCompatActivity {
    private String TAG = "MainActivity";
    ...
    public void test(int cameraId) {
        CameraManager manager = (CameraManager)this.getSystemService(Context.CAMERA_SERVICE);
        try {
            String cameraIdS = manager.getCameraIdList()[cameraId];
            CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraIdS);
            int support = characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);
            Log.d(TAG, "Camera support: " + support);
        }
        catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }
    ...
}

调用test(0)，我设备上的控制台输出是：

04-22 15:16:54.263 11578-11578/test.myapplication D/MainActivity: Camera support: 3

当我查找 support 的可能值时（docs), they must be 0, 1 or 2，但是 support 是如何取值 3 的？它应该是位掩码还是更糟的是发生了什么？

Answer 1

您正在查看 Android 发布版本的文档。目前，Android N 处于开发者预览阶段，文档为 elsewhere。

该特征有一个新的 INFO_SUPPORTED_HARDWARE_LEVEL_3 值，描述为：

...devices additionally support YUV reprocessing and RAW image capture, along with additional output stream configurations.

Android N Developer Preview：相机支持取第三个值

Android N Developer Preview: Camera support takes a third value

android

android-camera2