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This article illustrates a simple way to call pictures, video, audio, recording, and photographing in Android. Share to everyone for your reference, specific as follows:
Select the logo returned by the picture Requestcode Intent innerintent = new Intent (intent.action_get_content); "Android.intent.action.GET_CONTENT" Innerintent.settype (ContentType);
View
Mediarecorder can also be used to record video, in addition to being used for recording audio . about Mediarecorder, you can refer to the Android Development of Mediarecorder class explanation ". recording video with Mediarecorder is basically the same as
Android Video Recording
We generally extract data directly from the camera and microphone, encode the data, and save it as a file. Android video recording requires MediaRecorder. In addition to
When Android 2.3.7.r1 presses the menu key, the video is stopped. Press the menu key when you change the video to do not process it. The following modifications can be made:
In packages/apps/cameraopen/src/COM/mediatek/camera/videocamera. Java
In the onkeydown () method:
Modify
Case keyevent. keycode_menu:
If (mheadupdisplay! = NULL mglrootview! = NULL
! Malerts
When Android 2.3.7.r1 presses the menu key, the video is stopped. Press the menu key when you change the video to do not process it. The following modifications can be made:
In packages/apps/CameraOpen/src/com/mediatek/camera/VideoCamera. java
In the onKeyDown () method:
Modify
Copy codeThe Code is as follows: case KeyEvent. KEYCODE_MENU:
If (mHeadUpDisplay! = Nu
video function is like this: the video starts to be recorded once, and stops recording once again. So the name is toggle. Then the declaration function is added.
2. Add the implementation function: Find Android/VLC/lib/video. C, and then add the function implementation as f
In this article "VLC Android compilation and recording video functions", I found the Android version using VLC, but the video recording function is incorrect.
Its video
This is the feature that Android studio comes with, and there may be people who haven't found it, it's really simple, just look at the picture.There is no connection to the real machine or any virtual machine, the button is grayConnect to the true machine status:You can see the button to click on the status, click the screenshot button to try:You can also add borders, rotate, and so on, without demonstratingShort Video:Click Stop
Android multimedia audio and video recording MediaRecorderOverview:
MediaRecorder status chart:Initial: Initial state. When a MediaRecorder object is created using the new () method or the reset () method is called, The MediaRecZ prepare? Http://www.bkjia.com/kf/ware/vc/ "target =" _ blank "class =" keylink "> vcmRlcrbUz/examples/templates + SW5pdGlhbGl6ZWSjutLRs
We generally take data directly from the camera and microphone, encoded and saved as files. Android video recording requires the use of Mediarecorder,mediarecorder In addition to recording audio, and can also be used to record video.As shown in the following:One for the recording
The video recording process of the camera system involves several layers of camera driver, camera Hal, camera service, and camera Java.
The video recording function of camera is generally performed at the same time as the preview function. The recording thread of Samsung Hal
, parameters can be judged by the camera's parameter, called as follows:[Java]View PlainCopy
Mcamera.getparameters (). getsupportedvideosizes ()
But sometimes even if the correct parameters are set, you may need to call the following method before you start:[Java]View PlainCopy
Mcamera.unlock ();
This method from the method name is unlocked camera estimation is afraid to use the device conflict, the specific reason for later to see the camera related API description.
Specific performance:
Call Mediarecorder's start () and stop () interval cannot be less than 1 seconds (sometimes more than 1 seconds), otherwise it will collapse.
Error message:
Java.lang.RuntimeException:stop failed.
At Android.media.MediaRecorder.stop (Native method)
Solution:
Call Setonerrorlistener (null) before stop; it's OK!
Related code:
/** Start recording/@Override public MediaPart Startrecord () {if (Mmediaobject!
Recent research on the Android video recording, another mobile phone real-time viewing, there are a few ideas.1. The Android phone acts as a server, uses NANOHTTPD to act as a server, and another phone or PC is viewed by entering http://Phone's ip:8080 URL.This scheme can refer to Ipcamera-for-
Android audio and video goes deep into an AudioRecord recording to generate pcm into wav (with source code download), androidaudiorecord
This project address is named AudioRecord recording (can be paused, convert pch to wav ).Https://github.com/979451341/Audio-and-video-lear
Android 2.3.7.r1 stops recording when you press the menu key. Change to video when pressing the menu key does not do processing, you can make the following modifications:
In Packages/apps/cameraopen/src/com/mediatek/camera/videocamera.java
In the OnKeyDown () method:
Modify
Copy Code code as follows:
Case Keyevent.keycode_menu:
if (mheadupdis
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