Preview of the camera with Surfaceview and camera mates

The first is the camera class, which has been deprecated on 5.0, not recommended but still supported. The latest is the Camera2 class, I have not studied, it is said that the usage is completely different, but also a pit jump into another pit. Above is the introduction and the required permissions, remember to add permissions. Step in the following diagram: said the general process to use this class, three marked important entries, follow the steps to go. Note that 5th, Pass a fully initialized surfaceholder, need a fully initialized surface, that is, you need to wait until surface initialization is complete before you call Setpreviewdisplay (Surfaceholder).
So it's best to put Opencamera's work in the Surfaceholder callback: like here:

@Override  Public void surfacecreated (Surfaceholder holder) {System. out. println ("surfacecreated"= camera.open ();}

And what we're going to do is configure the camera.

Private voidInitcamera () {Parameters=camera.getparameters ();p Arameters.setflashmode ("off");//No Flashparameters.setwhitebalance (Camera.Parameters.WHITE_BALANCE_AUTO);p Arameters.setscenemode ( Camera.Parameters.SCENE_MODE_AUTO);p Arameters.setfocusmode (Camera.Parameters.FOCUS_MODE_AUTO); Parameters.setpreviewformat (IMAGEFORMAT.YV12);p arameters.setpicturesize (Camwidth, camHeight); Parameters.setpreviewsize (Camwidth, camheight);//these two properties will be error if these two properties are set differently than the real phonecamera.setparameters (parameters);//Automatic adjustment of the screen lensif( This. Getresources (). GetConfiguration (). Orientation! =Configuration.orientation_landscape) {parameters.Set("Orientation","Portrait");//Parameters.Set("Rotation", -);//lens angle to 90 degrees (the default camera is the horizontal beat)Camera.setdisplayorientation ( -);//more than 2.2 can be used}Else//if it is a horizontal screen{parameters.Set("Orientation","Landscape");//Camera.setdisplayorientation (0);//more than 2.2 can be used}byte[] buf =New byte[Camwidth * Camheight *3/2];camera.addcallbackbuffer (BUF); Camera.setpreviewcallback ( This);}

These are the things I call Open in surfacechanged:

@Override Public voidSurfacechanged (Surfaceholder holder,intFormatintWidthintheight) {System. out. println ("surfacechanged"); Initcamera ();Try{camera.setpreviewdisplay (holder); Camera.startpreview (); System. out. println ("Startpreview");} Catch(IOException e) {e.printstacktrace ();}}

We initialized the camera and set the Setpreviewcallback, so our processing of the image or the processing of the video can be camera.previewcallback its callback

@Override  Public void onpreviewframe (byte[] data, Camera camera) {ifnull) {  return;} System. out. println ("onpreviewframe"); int ret = avccodec.offerencoder (data, h264);}

Inside to do the processing, before setting the Camera.setpreviewcallbackwithbuffer (); The result onpreviewframe is only called once in open, and the reason for the day is found .... Only to find out it was here. First of all, follow-up do encode Add. GitHub resp Added.https://github.com/yocn/camerapreview

Preview of the camera with Surfaceview and camera mates