how to boost volume on android

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

In Class I studied Android Deep Exploration (Volume one) of this book. The first section of the textbook details how to build and use the Ubuntn Linux12.04 LTS, Android Simulator and s3c6410 Development Board.First of all, I learned that Android is a very good embedded operating system. Android's system architecture is

Changing the system default volume requires two places:1. Frameworks\base\media\java\android\media\audiomanager.java1 /**@hide Default Volume index values for audio streams*/2 Public Static Final int[] Default_stream_volume =New int[] {34,//Stream_voice_call47,//Stream_system55,//stream_ring68,//One ,//Stream_music76,//Stream_alarm85,//stream_notification97,

The android program obtains and sets the ringtone and volume.Obtain the ringtones and volume of the Android mobile phone through a program. Similarly, you can set the ringtone and volume easily! Audiomanager maudiomanager = (audiomanager) getsystemservice (context. audio_service );// Call

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

image of the memory disk)--Root--Symbols-System (storing the main file system)--System.img (image of File system)--userdata-qemu.img (data file used by simulator)--USERDATA.IMG (data content image)5. Publish your apk as an Android built-in programAPK is the zip format, odex format file is separate apk and Classes.dex file get. Copy the project directory to the Android source code directory/packagea/apps, p

package: Copy the downloaded Android-sdk_rl6-linux.tar file to a directory on the Linux file system, then open the terminal from that directory and enter the command: # TAR-XVF Android-sdk_rl6-linux.tar. 3. Enter the extracted directory to execute the Android script file. 4. Add the Platform-tools and tools directories to the PATH environment variable. Two: Inst

mstreamtypes is deposited into the Audioflinger, which is Mstreamtypes[stream].volume =value.When thread tries to play a sound, it does so in preparetracks_l:int32_t VL = t->prevvolume[0]; int32_t VR = t->prevvolume[1]; Const int32_t Vlinc =t->volumeinc[0]; Const int32_t Vrinc =t->volumeinc[1]; Do { *out++ + = (VL >> +) * (int32_t) *in++; *out++ + = (VR >> +) * (int32_t) *in++;

(Audiomanager.stream_music, audiomanager.adjust_raise, audiomanager.fx_focus_navigation_up); Currentvolume = Maudiomanager.Getstreamvolume (Audiomanager.stream_music); LOG.I (TAG, "Current Volume:" + Currentvolume); public void-down (view view) {///volume decrease Maudiomanager.adjuststreamvolume (Audiomanager.stream_music, Audiomanager.adjust_lower, AUDIOMANAGER.FX_FOCUS_NAVIGATIO

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

This chapter and the three chapter GIT usage has the connection, so, bar last chapter git basic usage to do well again, the concrete method is reads the net to check, here does not do the detailed step introduction.This chapter is a bit of meaning, is the source of the download and compilation, can see, can tinker, this chapter describes the method, can be analogous to other. Android has been mainly the migration of the Linux kernel, the Linux migrati

Android is a very good embedded operating system, Android system architecture is divided into 4 layers, the first layer of the Linux kernel, this layer mainly includes Linux drivers and memory management, process management, power management and other programs. and different Android versions of the driver may not be universal. The second layer is the C + + code b

Today Bo is mainly to share with you how to achieve audio recording on the Android platform volume indicator. Come to the point, first look at a demo:As shown, the two buttons are to start recording and stop recording, the middle of the two digits before and after the volume level (currently 8) and the original volume

The Android program obtains and sets the ringtone and volume.Obtain the ringtones and volume of the android mobile phone through a program. Similarly, you can set the ringtone and volume easily!AudioManagermAudioManager = (AudioManager) getSystemService (Context. AUDIO_SERVICE );// Call volumeInt max = mAudioManager. g

An example of this article describes how Android achieves volume tuning. Share to everyone for your reference. Specifically as follows: Main.xml Layout file: Audioactivity class: Package com.ljq.activity; Import android.app.Activity; Import Android.app.Service; Import Android.media.AudioManager; Import Android.media.MediaPlayer; Import Android.os.Bundle; Import Android.view.View; Import An

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