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Audio this aspect is very profound, I certainly can not speak what advanced things, at most also just some basic knowledge, first, we want to introduce Android he provided the recording class, in fact, he has two, one is Mediarecorder, There is another one that we are going to use today, what is the difference between them? Audiorecord
I. Distinction
Mediarecorder and Audiorecord can record
= STATE_SELECT_ALBUM) {/*** if it is a song folder, enter the song list of this folder */if (cursor. move ToPosition (position) {String [] columns = {MediaStore. audio. media. DATA, MediaStore. audio. media. _ ID, MediaStore. audio. media. TITLE, MediaStore. audio. media. DISPLAY_NAME, MediaStore.
After capturing the audio and video to save to a local file, this is a very common application scenario, dxpacknet saving video files is also relatively simpleWrite to stream with Iavistreamwriter AVI file1. Initialize the relevant device, set the data capture callback functiondxdevicecollection cameras; Idxcameracapture camcapture; Idxmicrophcaptur
Reprint Please specify source: http://blog.csdn.net/zhaokaiqiang1992Today, an open blog, found a friend sent me a private message, ask the following questions, so close this article, for its doubts.From this friend's question, we need to understand the following questions, in order to give him a good answer:(1) How can I get information about all the songs in my phone?(2) When the song file changes, such as adding and deleting operations, how to updat
MediaRecord can be used for recording in Android, which is easy to operate. However, it is not professional enough to Process audio. If you want to process audio in real time or encapsulate the audio
You can use AudioRecord for recording.
Here is a piece of code. Audio Rec
Mediarecord can be used for recording in Android, which is easy to operate. However, it is not professional enough to Process audio. If you want to process audio in real time or encapsulate the audio
You can use audiorecord for recording.
Here is a piece of code. Audio Recor
Different Android products often differ in the design of audio, and these differences can be obtained with the audio_policy.conf profile. There are two locations for audio profile storage in the Android system, and the storage address can be found in the AudioPolicyManagerBase.cpp
Android file storage-use SharedPreferences to save user preference setting parameters and read setting parameters
What file storage technologies does Android SDK support?
1. Use SharedPreferences to save key-value data
2. Stream
Project address, for starHttps://github.com/979451341/Audio-and-video-learning-materials/tree/master/FFmpeg (mp4%e8%bd%acyuv%ef%bc%89This time is to decode the MP4 the YUV file out, first introduced a wave of YUV fileYUV refers to the luminance parameters and chromaticity parameters are separated by the pixel format, and the advantage of this separation is not only to avoid mutual interference, but also to
Mediafile. Java
Package COM. jaycee. vplayer. util; import Java. util. hashmap; import Java. util. iterator;/*** determine the file type * mediascanner helper class. */public class mediafile {// comma separated list of all file extensions supported by the media category public static string sfileextensions; // audio file
This article illustrates the saving and reading function of the Android implementation file. Share to everyone for your reference, specific as follows:
Note: There are Getfiledir () and Getcachedir () in the activity; method to obtain the current package file path from the current phone's storage space
Getfiledir ()-----/data/data/cn.xxx.xxx (current package)/f
the public files to the external store:
Copy Code code as follows:
Public File Getalbumstoragedir (String albumname) {
Get user's public picture directory
File File = new file (Environment.getexternalstoragepublicdirectory (
environment.directory_pictures), albumname);
if (!file.mkdirs ()) {
L
Android File save read can be selected in the phone itself storage, external storage such as SD card, this article will be introduced in turn.1. Save and read files in the phone itself. The layout file is as follows:As follows:In the Fil
Android log Print class Logutils, able to navigate to the class name, method name, and number of rows where the error occurred and save the log file
In development, we often use print log to debug our application. In Java we often use Method System.out.println () to print logs in the console for our debugging. There is a dedicated class log in
manner
Uninstall the app and delete only the data you stored ingetExternalFilesDir()目录下的文件
外部存储适用于不需要存储限制的文件以及你想要与其他app共享的文件或者是允许用户用电脑访问的文件 app默认安装在内部存储中,通过指定android:installLocation 属性值可以让app安装在外部存储中。 获取外部存储权限: Read and write: ... > android:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/> ... Manifest > Read: ... > android:name= "Android.permission.READ_EXTERNAL_STORAGE"/> ... manifest> You do not need any permissions to
---textbox.settext ("");
catch (IOException IoE) {ioe.printstacktrace (); }
}
}
In the code above, use the getExternalStorageDirectory () method to get the path to the SD card. Normally, return "/sdcard" above the real machine and return "/mnt/sdcard" on the emulator. However, do not attempt to write the path of the dead SD card, because the handset manufacturer may go to the SD card to specify a path. Therefore, be sure to use the getExternalStorageDirectory () method
In the last two sections we are using text files to save the user's information, which is obviously a loophole. At the same time, the content of the file is not managed. Today we learn to save with Sharedpreference. Sharedpreference is dedicated to preserving some of the more fragmented data.We still use the example of the previous section to analyze the user's i
Android app File save directory can be the app's built-in private directory, of course, you can also choose the external sdcard directoryBuilt-in private directory
/data/data/[packagename]/files file cache directory, generally save small
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