From b3810562527858a3b3d98ffa6e9c9c5b0f4a9a8e Mon Sep 17 00:00:00 2001
From: liyujie <2352380935@qq.com>
Date: Thu, 28 Aug 2025 12:04:14 +0000
Subject: [PATCH] [1/4]解决USB摄像头打开相机预览界面绿屏
---
android/frameworks/ex/camera2/portability/src/com/android/ex/camera2/portability/AndroidCamera2AgentImpl.java | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/android/frameworks/ex/camera2/portability/src/com/android/ex/camera2/portability/AndroidCamera2AgentImpl.java b/android/frameworks/ex/camera2/portability/src/com/android/ex/camera2/portability/AndroidCamera2AgentImpl.java
index 2fc4ad3..1da6ed0 100644
--- a/android/frameworks/ex/camera2/portability/src/com/android/ex/camera2/portability/AndroidCamera2AgentImpl.java
+++ b/android/frameworks/ex/camera2/portability/src/com/android/ex/camera2/portability/AndroidCamera2AgentImpl.java
@@ -1292,6 +1292,7 @@
private final int mNumberOfCameras;
private final int mFirstBackCameraId;
private final int mFirstFrontCameraId;
+ private final int mFirstExternalCameraId;
public AndroidCamera2DeviceInfo(CameraManager cameraManager,
String[] cameraIds, int numberOfCameras) {
@@ -1301,6 +1302,7 @@
int firstBackId = NO_DEVICE;
int firstFrontId = NO_DEVICE;
+ int firstExternalId = NO_DEVICE;
for (int id = 0; id < cameraIds.length; ++id) {
try {
int lensDirection = cameraManager.getCameraCharacteristics(cameraIds[id])
@@ -1313,12 +1315,17 @@
lensDirection == CameraCharacteristics.LENS_FACING_FRONT) {
firstFrontId = id;
}
+ if (firstFrontId == NO_DEVICE &&
+ lensDirection == CameraCharacteristics.LENS_FACING_EXTERNAL) {
+ firstExternalId = id;
+ }
} catch (CameraAccessException ex) {
Log.w(TAG, "Couldn't get characteristics of camera '" + id + "'", ex);
}
}
mFirstBackCameraId = firstBackId;
mFirstFrontCameraId = firstFrontId;
+ mFirstExternalCameraId = firstExternalId;
}
@Override
@@ -1347,6 +1354,11 @@
return mFirstFrontCameraId;
}
+ @Override
+ public int getFirstExternalCameraId() {
+ return mFirstExternalCameraId;
+ }
+
private static class AndroidCharacteristics2 extends Characteristics {
private CameraCharacteristics mCameraInfo;
@@ -1367,6 +1379,12 @@
}
@Override
+ public boolean isFacingExternal() {
+ return mCameraInfo.get(CameraCharacteristics.LENS_FACING)
+ .equals(CameraCharacteristics.LENS_FACING_EXTERNAL);
+ }
+
+ @Override
public int getSensorOrientation() {
return mCameraInfo.get(CameraCharacteristics.SENSOR_ORIENTATION);
}
--
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