volume enhancer for android

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

. Because the Linux kernel is based on the GPL protocol, Android is based on the Apache Licence 2.0 protocol. So Google played a "traversal" to move the sensitive code that was originally in the Linux driver up a level, so that these sensitive code to get rid of the GPL protocol, those who do not want to open source Linux drivers are not necessary to open source.For some special requirements for some hardware, it may be necessary to access some user s

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

value) netmask (mask) upRoute add default GW (address value) Dev eth0Querying the current IP configuration and routing table of the Development Board/system/busybox/sbin/ifconfig/system/busybox/sbin/routeSetting up IP and gatewaysSH netconfig.sh (with a single IP address to the front)Turn off the network card device/system/busybox/sbin/ifconfig eth0 DownSet a new MAC address/system/busybox/sbin/ifconfig eth0 hw ether 08:90:00:a0:90:80Turn on the network card device/system/busybox/sbin/ifconfig

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

Android sound focus ---- adjust the volume of Music from Music back to Luncher Sound types are defined in the AudioSystem. java file. /* The default audio stream */public static final int STREAM_DEFAULT = -1;/* The audio stream for phone calls */public static final int STREAM_VOICE_CALL = 0;/* The audio stream for system sounds */public static final int STREAM_SYSTEM = 1;/* The audio stream for the phone r

By learning Android Deep Exploration (Volume one) HAL and Driver Development Chapter Sixth let me understand the complete process of developing and testing Linux drivers for counting the number of words.The Linux system maps each driver into a single file, which is called a device file or driver file, and is stored in the/dev directory. Since most Linux drivers have their corresponding device files, exchang

By learning Android Deep Exploration (Volume one) HAL and Driver Development eighth chapter Let me know how to make the Development Board sound, how to write a buzzer driver. Understand the code reuse of Linux drive, code reuse is divided into static and dynamic two kinds.Linux-driven code reuse there are many ways, you can use the standard C program, the code of the important code in other files, if you wa

By learning Android Deep Exploration (Volume one) HAL and Driver Development chapter Tenth let me know the debugging technology and debugging tools for embedded Linux.PRINTK can print kernel debugging information, the function is similar to the printf function, except that the PRINTK function runs in kernel space, and the printf function runs in user space. The PRINTK file is a simple four-digit text file w

The reason was not found, but it seems to be resolved as follows:Resolution process: Because the code is very small, so I re-establish a blank program, copy the code in the past, the word is not bad. Recompile, the key moment is up: Do not connect to the real machine, when the compilation is complete, the system prompts whether to launch the Android emulator, select "No", this time to exit. To the bin directory to see, the program size from the origin

S3C6410 is a low-power, cost-effective SC (reduced instruction set computer, introduced by Samsung,Compact instruction set computer processor, which is based on the ARM11 kernel.OK6410 Development Board with "core board + backplane" structureInstall serial debugging tool: MinicomFirst step: Detect if the current system supports SB-turn serial portLsmod | grep usbserialStep Two: Install Minicomsudo apt-get install minicomStep Three: Configure Minicomsudo minicom-sEntering the "Serial Port Setup"

provides a branching concept. In other words, the person participating in the development creates a branch for each modification so that the commit does not affect the code of the main branch after the modification.Local branches are designed to isolate changes to different parts of the main branch. Use the git checkout command to switch between different local branches. It is meaningless if you only operate locally.Using Git to manage your source code will use a remote git hosting server. GitH

The MediaPlayer class for music media playback in Android is defined as followsFinal MediaPlayer Mprain = mediaplayer.create (this, r.raw.rain);The file is Res/raw/rain.mp3//raw I created it myself in Androidstudio.My own usage here is that there is only one button, click Use, if it stops on playback, otherwise start playing, attach code1Mprain.setlooping (true);2Buttonrain.setonclicklistener (NewButton.onclicklistener () {3 @Override4 Pu

to put the business logic into the HAL Library . Step 2 : Write HALThe HAL library is an ordinary Linux Library (*.so ) file. However, this type of library file has an interface. The SYM variable is module_info through the HAL. Service Library is defined in this interface by the ID positioning hallibrary the. Step 3 : Write the Service LibraryAlthough this step is not required, the new HAL architecture requires us to do so. the Service library is also a Linux library . This step is more flexib