android camera api tutorial

Create a preview class To allow users to effectively obtain images and videos, they must be able to see images in the camera. A camera preview class is a surfaceview class that can display Real-Time Images in the camera, so users can frame and capture images or videos. The Code in the following example demonstrates how to create a basic

Brief analysis of the simple use of cameraAs a result of the recent work on the use of Android.hardware.Camera this class, so simple to learn some basic usage.First of all: Camera This class is not recommended after API21, the official provides a new class called: Camera2, which contains a new callback mechanism, interested friends can study carefully.Camera Official API Guide: No wall and too lazy to open

. DIRECTORY_PICTURES), "MyCameraApp "); // This location works best if you want the created images to be shared // Between applications and persist after your app has been uninstalled. // Create the storage directory if it does not exist If (! MediaStorageDir. exists ()){ If (! MediaStorageDir. mkdirs ()){ Log. d ("MyCameraApp", "failed to create directory "); Return null; } } // Create a media file name String timeStamp = new SimpleDateFormat ("yyyyMMdd_HHmmss"). format (new Date ()); File me

In the previous chapter, we completed the configuration of the Android Platform development environment, and also found a way to remove the OpenCV Manager API, then we start from scratch, the completion of a personal program, the implementation of the following functions:1. Identify the specified picture and draw the edge of the picture with a colored box2. Display a 3D model on the identified imageIt is no

The road to Android development and learning-Experience of Camera As the name suggests, Camera is a function for taking pictures and recording videos. If you want to take a photo and upload it, you can use camera to take a photo, store the photo, and send it to your friends. In this case, the app is not directly implem

Reference: Http://blog.sina.com.cn/s/blog_7dbac1250101mloj.html uses the gravity sensing method has realized to realize the Android camera autofocus, is not difficult, But it will take a bit of effort to achieve automatic, continuous autofocus. This is where my research ideas and solutions are recorded. To achieve auto-focus, the method is as follows:First : The most common implementation---use a button or

inherits a bncameraclient class for cameraservice callback itself.Class icameraclient: Public iinterface{Public:Declare_meta_interface (cameraclient ); Virtual void notifycallback (int32_t msgtype, int32_t ext1, int32_t ext2) = 0;Virtual void datacallback (int32_t msgtype, const sp Virtual void datacallbacktimestamp (nsecs_t timestamp, int32_t msgtype, const sp };As shown in the preceding interface definition, this class is used for callback. The takepicture function of

These two days playing Android games, the blog has not added something for several days, ashamed! Take a look at one of the most collapsing problems of the two days. Good early installed the development environment, really started or these two days, very unfamiliar, although there are SDK documentation, so many mosquito-like word, really do not mind to study slowly. This does not want to call the camera, t

Android Camera Real-Time Filter (8)1. What can Android Camera do?1. Function photo recording and video recorder (scanning applications, such as face recognition, business card recognition, and bar code recognition) 2. Implement your own Camera program based on the

Recently engaged in the work related to the development of Android camera, found that this piece is still more complex, from the network also get a lot of relevant information, but are relatively dispersed, for the problems arise difficult to have a comprehensive understanding and positioning. According to my own habits, I prefer the whole framework to understand first, and then for a part of a serious anal