volume equalizer for android

Ubuntu Linux10.04 above version of the operating system.GNU c is an extension of standard C and is the most commonly used C language compilation environment under Linux.Five Linux device drivers:device-driven communication hardware and software, and distinguish between the hardware, to make a clear responsibility for the engineers and engineers, do not need soft and hard balance. device driver and hardware direct interaction abstraction interface, so that the application software can be driven

For Android volume adjustment, the volume can be divided into key adjust volume and settings. Let's start by talking about the volume adjustment in the settings.First, the volume of the classification:1.audiomanager.stream_voice_c

(1) Procedures Android API's AudioManager provides a method to adjust the volume of mobile phones. audioMa.adjustVolume(AudioManager.ADJUST_LOWER, 0); audioMa.adjustVolume(AudioManager.ADJUST_RAISE, 0);You can also adjust the voice mode of your phone to vibrate or mute. AudioMa. setRingerMode (AudioManager. RINGER_MODE_NORMAL ); AudioMa. setRingerMode (AudioManager. RINGER_MODE_SILENT ); AudioMa. setRinge

The volume service of Android is mainly used to manage external storage devices such as USB/SD card. The platform can perform operations and polling on external storage devices. When the status of the external storage device changes, the volume service will immediately report to the platform. The relevant code is mainly located:System/CORE/voldFrameworks/base/ser

command execution)#add-apt-repository "Deb Http://archive.canonical.com/lucid partner"#apt-get Update#apt-get Install SUN-JAVA6-JDKInstalling the Android SDK1,: http://developer.android.com/sdk/index.html2, download the SDK, get Android-sdk_r16_linux.tar file3, copy to a directory in the Linux file system, and then enter the directory and unzip the Linux terminal4, after the decompression directory more th

provides a class to control the volume and vibration of the system. Android. Media. audiomanager uses this class.Set the phone to mute or vibrate, and change the vibration type. Audiomanager cannot be instantiated in code. You need to obtain its instance through context. getsystemservice (context. audio_service. OK. After obtaining the audiomanager instance, we can call the audiomanager method setringermod

Structure Analysis6. Publish your apk as an Android built-in program7. Test the System.img file with the simulatorSecond, download and compile the Linux kernel source code1. Download the Linux kernel source codeDirectory structure of 2.Linux kernel source code3. Install the Android kernel's build environment(1) Preparation: Copy the arm-linux-gcc-4.3.2.tgz file and the arm-none-linux-gnueabi-arm-2008q3-72-

Because the Ubuntu linux12.04 virtual environment on the disc requires the CPU to support virtualization, some PCs may not be able to successfully open the virtualization environment, and AMD's CPU may not. But it doesn't matter. The disc containsSource code(Sources directory ). You only needCodeIn the/root/DRIVERS directory of Ubuntu Linux, open the common. Sh file in the source code root directory, and find the following line. Ubuntu_kernel_path =/usr/src/linux-headers-3.2.0-29-generic C

When the volume button in Android is turned down, if you keep holding down the down button, the system will jump to a minimum and then automatically adjust to mute. This mechanism and iphone is different, the iphone no matter how you press the volume-button, can only be adjusted to the smallest, or a little voice, is not automatically mute.Android If you want to

Today Bo is mainly to share with you how to achieve audio recording on the Android platform volume indicator. Straight. First Look at a demo:As seen, the two buttons each start recording and stop recording, the middle of the two digits before and after the volume level (now 8) and the original volume value (0-32767), b

By learning Android Deep Exploration (Volume one) HAL and Driver Development Nineth Chapter Let me know the HAL hardware abstraction layer, why to add Hal and Android Hal Architecture in Android.Hal is a set of libraries built on Linux drivers. This library is not part of the Linux kernel, but is the application layer on top of the Linux kernel layer, the main pu

Extends:http://blog.csdn.net/alvinhuai/article/details/8955127,http://mikespook.com/2010/11/android-%e5%ae%9e% E6%97%b6%e8%8e%b7%e5%8f%96%e9%ba%a6%e5%85%8b%e9%a3%8e%e8%be%93%e5%85%a5%e9%9f%b3%e9%87%8f%e7%9a%84%e4%bb%a3%e7 %a0%81/A few days ago to do a recording and get the volume size of the module, today write a demo and share. If you have a better way to remind me of a message, thank you.First, the record

The Android audio curve call is set down from the ui. There are different UIS Based on stream audio, which are divided into 7 and 15 steps, corresponding to the actual step 100. For the conversion process, see the volIndexToAmpl function in AudioPolicyManagerBase. cpp. 4.1 The Calling process is different from the previous one, and the principle is the same. I think the previous version is linear, and the new version is a three-segment line. Why is it

Linux kernel. Perform one of the following 4 commands to generate a. config file:(1) Make config: configured in text format;(2) Make Menuconfig: configured as a character interface menu;(3) Make Oldconfig: will give the default value of the text format configuration;(4) Make xconfig: Configuring the Linux kernel as a graphical interface will require QT installation, "Apt-get install Libqt-dev"It is recommended to use make menuconfig, which will generate Zimage files (Linux kernel binaries) afte

ArticleDirectory Learn about audiomanager Introduction to audiomanager Learn about audiomanager The audiomanager class is located in the Android. Media package, which provides operations to control the volume and audible mode. Introduction to audiomanager There are too many methods for mail to audiomanager. Here are only a few common methods: Method: adjustvolume (INT direction, int flags)Expla

Implementation ideas:The Windowmanagerservice Loop reads the following key messages and distributes them to the window, filtering the messages in the Phonewindowmanager.interceptkeybeforequeueing method before the message is distributed. Therefore, the implementation of the message before the distribution of the Interceptkeybeforequeueing method to listen to the current key is the volume down key, if the current state is the lock screen state, and the

Default volume frameworks \ base \ media \ Java \ Android \ media \ audiomanager. Java /** @ Hide default volume index values for audio streams */ Public static final int [] default_stream_volume = new int [] { 4, // stream_voice_call 7, // stream_system 4, // stream_ring 8, // stream_music 4, // stream_alarm 4, // stream_notification 7, // stream_rjth_sco 7, /

Http://www.mikespook.com/index.php/archives/762 Android has some interesting applications, such as blowing skirts and blowing balloons. The microphone input volume is obtained in real time and then processed accordingly. Many people on the Internet have asked how to deal with this problem, but there are still some answers, but there is no actual code. After a simple exploration, I wrote a demo and tried i

First, you must obtain the system's sound service permissionsandroid:name= "Android.permission.MODIFY_AUDIO_SETTINGS"/>Then it's the variable that declares the control sound.// Call VolumeYou can then use the get and set methods of the Audomanager to get the sound and set the sound.current =// Get Music volume current = Maudiomanager.getstreamvolume ( Audiomanager.stream_music); /* Set volume function

(Isgetvoicerun) {LOG.E (TAG, "Still on record"); Return } Maudiorecord = new Audiorecord (MediaRecorder.AudioSource.MIC, Sample_rate_in_hz, Audioformat.chann El_in_default, Audioformat.encoding_pcm_16bit, buffer_size); if (Maudiorecord = = null) {LOG.E ("sound", "Maudiorecord initialization failed"); } isGetvoicerun = true; New Thread (New Runnable () {@Override public void run () {maudiorecord.startrecording (); short[] buffer = new Short[buff