要求以人像模式显示相机。
相机视图在所有其他设备上正常显示,如- Nexus 4, Nexus 5,三星S3,三星S4等。
使用NEXUS 6时,相机显示为上下颠倒。
这是我如何设置相机参数-
private void setCameraParameters() {
try {
Parameters parameters = mCamera.getParameters();
Camera.CameraInfo camInfo = new Camera.CameraInfo();
Camera.getCameraInfo(mCameraId, camInfo);
int cameraRotationOffset = camInfo.orientation;
System.out.println("Offset :" + cameraRotationOffset);
if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
parameters.set("orientation", "portrait");
mCamera.setDisplayOrientation(90);
Camera.Size size = getBestCameraSize(90,getWidth(),getHeight(),parameters);
if(size==null) {
size = getOptimalPreviewSize(90, getWidth(), getHeight(), parameters);
}
parameters.setPreviewSize(size.width,size.height);
mCamera.setParameters(parameters);
}
} catch (Exception e) {
e.printStackTrace();
}
}
经过我的实验,我明白了将显示方向设置为270度在Nexus 6上工作得很好。
查询-如何找出所有设备需要显示方向为90和所有设备需要显示方向为270 ?如何检测呢?
使用此代码设置相机的方向为人像。这是一个通用的,应该适用于所有设备:
public static void setCameraDisplayOrientation(Activity activity,
int cameraId, android.hardware.Camera camera) {
android.hardware.Camera.CameraInfo info =
new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
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 (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
来源:http://developer.android.com/reference/android/hardware/Camera.html