volume locker for android

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

From: http://www.inandroid.cn/bbs/thread-132546-1-1.htmlObtain the ringtones and volume of the Android mobile phone through a program. Similarly, you can set the ringtone and volume easily!The method for setting the volume is also very simple. audiomanager provides the method:Publicvoidsetstreamvolume (intstreamtype, i

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

The realization of thought:The Windowmanagerservice loop reads the following key information and distribution forms. Filtering of messages in the Phonewindowmanager.interceptkeybeforequeueing method.Therefore, the implementation is to listen to the current key in the Interceptkeybeforequeueing method before the message is distributed to the volume key, assuming the current state is the lock screen state. And the key is the

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

Basic knowledge The most familiar unit for measuring sound intensity is decibels (decibel, abbreviated to DB). This is an dimensionless relative unit , and the formula is as follows: The molecule is the measured sound pressure, the denominator is the reference value of the sound pressure (20 micro-PA, human can hear the minimum sound pressure). So in daily speaking, the sound intensity is how many decibels, is the default of a very small reference value. and the

Audiorecorddemo () {mLock = new Object (); public void Getnoiselevel () {if (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 () {maudio

Android audio and video goes deep into thirteen OpenSL ES to create a music player, which can pause and adjust the volume (with source code download), androidopensl Project addressHttps://github.com/979451341/OpenSLAudioOpenSL ES is a public audio API developed based on NDK, that is, the underlying C language. It can be used to achieve standardized, high-performance, and low-response-time audio functions.Th

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. How can we obtain the sound size during the recording process? There is an instance below Java code: Package EOE. demo; import android. media. audioformat; import

My project is cocos2d-x-3.7.1 project, with the command line (Cocos run-p Android) when packaging the error:Running: ' D:\develop\adt-bundle-windows-x86-20140321\apache-ant-1.9.3\bin\ant 'Clean debug-f d:\deveop\test\proj.android\build.xml-dsdk.dir= "D:\develop\adt-bUndle-windows-x86-20140321\sdk "'Workaround:Enter the Cocos2d-x-3.7.1\tools\cocos2d-console\plugins\project_compile directory. Locate the build_android.py file, open it with the Edit tool,

the IP and subnet masks using the Linux command Ifconfig, and set the gateway with the route command.This chapter only describes how to install Android on the Ok6410-a Development Board. Of course, readers can also choose other boards, or they can do Linux drivers directly on the phone. Because of the different development boards and mobile phone installation of the Android method has a certain difference,

Problem Description:"Test Steps" 1, the desktop simultaneously press and hold power and volume-"Test Result" no sound"Expected result" should not have no soundThis is a Google common problem for the following reasons:Decode does not complete when first capture.Solution:for Audio Sound pool case, skip EOS delay time-to-faster to send-out EOS.Modified Location: Frameworks/av/media/libstagefright/awesomeplayer.cppvoid Awesomeplayer::p ostcheckaudiostatus

By learning Android Deep Exploration (Volume one) HAL and driver development in the seventh chapter let me know how to control the light emitting diode through the driver, realize the driver directly interacts with the hardware.A complete Linux driver mainly consists of internal processing and hardware interaction, in which the internal processing mainly refers to the Linux driver loading, unloading, device

. 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

to delete the Showasaction property and change the Styles.xml resource file inside the menu resource file:Delete the code marked with the Red line:To change the Style.xml resource file:[HTML]View PlainCopyprint? style name= "apptheme" parent="Android:Theme.Light"> style> Third, change the class file inherits the object is activity[Java]View PlainCopyprint? Public class Mainactivity extends Activity Importing activity packs and removing unnecessary packages

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

file system (/dev). /proc is a virtual file system, which means that/proc is not a real file system, but a memory map.Debugging Tools:Debug the user space program with GDB, remotely debug the user space program with Gdbserver, and debug the kernel program remotely with KGDB.When you find that there are too many bugs in a piece of code, it is difficult to find out through the PRINTK function output information, consider using KGDB to locate the bug in step by step mode.Read "

Linux drivers is very important, is to modify the Linux driver source code, should try not to modify the Linux The driver interface. In a complete Linux Drive, mainly consists of internal processing and hardware interaction two parts. If the inter-Linux porting between different versions , the main porting of the first part, on different hardware platforms, then the main second part. Software 1308 class 31st Zhang Fan Blog Park address: http://home.cnblogs.com/u/sxauzzz/

extinguished. The ARM processor has multiple registers, by setting the values of different registers. You can set the status of the LED PIN, open or disable the pull-up (pull-up) circuit, and control the light and off of the LEDs.4. Control LEDLED drivers can use the following two ways to control LEDs:The LED is controlled by a string,Control led by l/0 command;To control LEDs, use both of these methods. The LED driver must receive the corresponding data. If the LED is controlled by a string. Y