android volume control app

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:

. 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

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

Speaking of Android phone, most people's impression is a bit of time to become a little lag, some programs in the run inexplicably crashes, open the System folder A look, found a lot of files, and then use the mobile phone butler APP constantly clean optimization, just feel the speed slightly improved point, Even if the mobile phone in a variety of performance in front of the software score ahead, or feel n

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

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,

Tv.settext ("Music advertisement end!"); - } - catch (Exception e) - { + Tv.settext (e.tostring ()); - e.printstacktrace (); + } A } at }); - - / * When Mediaplayer.onerrorlistener will run the listener - Mp.setonerrorlistener (New Mediaplayer.onerrorlistener () - { - @Override in / * Overwrite error handling events - Public Boolean onError (MediaPlayer arg0, int arg1, int arg2)

Recently, a small calculator has been developed with Androidstudio, and the code adds up to less than 200 lines. However, a problem has been encountered, the size of the exported apk file reached 1034K. It's not scientific, so just do it yourself and simplify the APK. Now let's learn how to reduce the size of an apk to the example of Hello World.New project, minimum version support 2.3.3, other default. The project catalog is this:We direct signature export APK, see how size, 1M Ah! (⊙o⊙) What t

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 t

Speaking of Android phone, most people's impression is a bit of time to become a little lag, some programs in the run inexplicably crashes, open the System folder A look, found a lot of files, and then use the mobile phone butler APP constantly clean optimization, just feel the speed slightly improved point, Even if the mobile phone in a variety of performance in front of the software score ahead, or feel n

supportThe new Google Marketplace (Google Play)Enhanced Desktop plugin Customization featuresComparing these two system versions, the early Android system still has a big gap with the current high-version system. That's why some Android apps are doing so well, often using theSome features in the higher-version system. In fact, for Android developers, based on th

control system as part of the project. To edit the file, you can right-click the project folder in Eclipse and select Properties.　　Local.propertiesThis file is used to save custom build properties for a specific computer. If you use ANT to build your project, the file needs to include the SDK installation path. The file should not be included in the version control system. If you use Eclipse, the file can

) {super (context, attrs);} // rewrite the ondraw method @ Overridepublic void onDraw (Canvas canvas) {super. onDraw (canvas); // create Paint paint = new Paint (); // set the paint color. setColor (Color. RED); // draw the canvas ball. drawCircle (circleX, circleY, circleR, paint);} // get set Method public float getCircleX () {return circleX;} public void setCircleX (float circleX) {this. circleX = circleX;} public float getCircleY () {return circleY;} public void setCircleY (float circleY) {t

Differences between Android TV app and mobile app: androidappOne of the company's projects is for android TV. Thanks to the daily report, summary: android TV app presents the difference between the ui and mobile app.The main diffe

Android app source code is based on android's personal privacy monitoring project, Android android The system draws on the advantages of existing security software and designs four functional modules: permission access monitoring, traffic monitoring, application risk monitoring, and signature verification. It

Android: The package name is inconsistent with the package name of your project, I thought it was a misunderstanding that the names of custom packages were different; An error occurred while referencing the Android custom control ......) An error occurred while referencing in xml. The reference should be fully written, and it should not be omitted from t

Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells Android has maintained an isolated audio stream for playing music, alarms, notification bells, incoming calls, system sounds, call sounds, and DTMF channels, which is the premise that we can control different audio, most of which are system-limited and cannot

application. This model is more suitable for the domestic Android App store, often in the domestic Android App Store we can see the first few have tens of millions of of the download, in fact, many are brushed out. In foreign countries, the risk is too great.While overseas, due to the stricter appstore audits, such as

Another super-beautiful calendar Control for Android, android calendar Control※Effect※Usage Package com. fancyy. calendarweight; import java. util. arrayList; import java. util. list; import android. app. activity; import