android audiotrack example

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One of Android audio systems: How does audiotrack exchange audio data with audioflinger?

Introduction In the Audio Subsystem of the android framework, each audio stream corresponds to an audiotrack instance. Each audiotrack is registered to audioflinger at creation, audioflinger is used to mix all audiotracks and then deliver them to audiohardware for playback. Currently, froyo of Android allows you to cre

Android multimedia development (5) ---- use Android audiotrack to play MP3 files

/*************************************** **************************************** ************** Author: conowen @ Dazhong* E-mail: conowen@hotmail.com* Http://blog.csdn.net/conowen* Note: This article is original and only used for learning and communication. For more information, indicate the author and its source. **************************************** **************************************** ************/ 1. Introduction to Android

Android Audio Code Analysis 13-AudioTrack: getPosition Function

We plan to use the interfaces used in the test code as the points, and take the call relationship between interfaces as the lines to gradually crack the Audio veil in Android. **************************************** * Source Code ************************************** ***********Public void testPlaybackHeadPositionAfterInit () throws Exception {// Constants for testFinal String TEST_NAME = "testPlaybackHeadPositionAfterInit ";Final int test_sr= 22050

Android Audiomanager Solve MediaPlayer audiotrack Adjust volume q

In handset mode Am.setspeakerphoneon (FALSE);Setvolumecontrolstream (Audiomanager.stream_voice_call);Am.setmode (Audiomanager.mode_in_call);I use MediaPlayer audiotrack to adjust the volume always fails At.setstereovolume (vol, vol);Player.setvolume (Vol,vol);Then decided to use Audiomanager to adjust the volume. Audiomanager can modify the volume of the system's Android system Here are some ways to adj

[Android] Audiotrack::start

Audiotrack's Start method is used to achieve Android audio output, what exactly did start do? Recalling the last section of the previous section createtrack_l, a track handle was returned through binder and savedstatus_t audiotrack::createtrack_l (...) { spStart is primarily called the Start method of the track to achieve the audio output function----------------------------------------------------------

Android uses Audiotrack to send infrared signals

Recently to do a project, the use of the phone's headphone port output infrared signal, thereby turning the phone into an infrared remote control, signal processing knowledge is basically returned to the teacher, just started really a headache. Find a lot of information to study a bit, finally a little experience, here to do a memo.First, the audio signal output principleThe principle of output signal of audio headphone port already has the article of Daniel, refer to http://blog.csdn.net/xl1986

Android: Use the audiotrack class to play wav files

Reference: http://mindtherobot.com/blog/624/android-audio-play-an-mp3-file-on-an-audiotrack/ Http://baike.baidu.com/view/14471.htm We recommend that you download a ringtone file (smaller) and then convert it to WAV. The source code is as follows: Public class playmp3activity extends activity {Private final string file = "// sdcard // testring.wav ";Private Final Static string tag = "22 ";Static byte [] buff

Android development implementation calculator example, android calculator example

Android development implementation calculator example, android calculator example Example The Code is as follows:Android: id = "@ + id/warpcontent"Android: layout_width = "fill_parent"Android

Android client-server interaction login example, android example

Android client-server interaction login example, android example Today, I learned how the android client interacts with the server, and found that it is actually a bit similar to the web. Then I found a logon example on the Intern

Step by step, develop the first Android project as shown in the figure below and run the Android-Android development example tutorial 2 and the first android program.

Step by step, develop the first Android project as shown in the figure below and run the Android-Android development example tutorial 2 and the first android program.1. generate an Android Application Project 1.run eclipse.exe 2.

When you say no, what should you say: Take playing MIDI on Android as an Example

When you say no, what should you say: Take playing MIDI on Android as an Example China said "no" to the United States several years ago, and software engineers often said "no" to users and colleagues ".However, when you say no to others, why? It is said that when a boy says no, it means no. It is said that when a girl says no, it is recommended that the performance continue.Meaning. This pitfall has hurt ma

My Android advanced tour ------ & gt; Android uses Sensor (Sensor) to implement a small example of the level function, android level

My Android advanced tour ------> Android uses Sensor (Sensor) to implement the level function. The level here refers to a more traditional bubble level, filled with liquid in a transparent disc, with a bubble in the liquid. When one end is tilted, this bubble will float at one end.The first parameter returned by the Direction sensor is used to implement a compass application. My

The source code of the Android example imitates android WeChat, Alibaba Cloud play radar scanning animation, and Android android micro

The source code of the Android example imitates the animation effects of android and Alibaba Cloud broadcast radar scanning. This project is a small example of imitating the Android and cloud play radar scanning animation effects. Click the black circle in the middle to sta

When you say no, what should you say: Take playing midi on Android as an Example

simplicity. And then deny them one by one. Do not look forward to interaction when writing documents or reports. Do not ask him to answer questions, Use the answer to block all the places where he may open his mouth. If the enemy is not attacked, I am waiting for it. The following is an instance story. This is why we need to train and write the experiment report. It records the process. And data to support your views. No one will be like the president in science fiction movies, because you

Develop a new Android interface, interface jump See graphic android---Android Development example tutorial three or four

Android.content.intent;import android.os.Bundle; Import Android.os.handler;import Android.widget.imageview;public class StartActivity extends Activity {/** called when The activity is first created. */private final int splash_display_lenght = 3000; Delay three seconds @Overridepublic void OnCreate (Bundle savedinstancestate) { super.oncreate (savedinstancestate); Setcontentview (R.layout.start); New Handler (). postdelayed (New Runnable () { @Override public voi

Android Source code: (i) Android 2.1 to 4.4 operating system common Actionbar implementation of the tab navigation example.

Tell me what I'm trying to do before I finish this example. First, modify the "Actionbarsherlock" navigation example. Before I implemented this example, I tried "actionbarsherlock" to modify one of its tab navigation examples, and the modification was successful. But finally found that it is not a actionbar implementation of the tab, can not hide Actionbar, when

One of the android getting started development guides-Hello, Android example

One of the android getting started development guides -- hello, Android example (I) Hello, Android example The first impression is very important. As a developer, you know that the first impression of a development framework is to write "Hello, word !", In

[Android] Android Hello World Example

public void OnCreate (Bundle savedinstancestate) { super.oncreate (savedinstancestate); TextView Text = new TextView (this); Text.settext ("Hello World, Android-mkyong.com"); Setcontentview (text);} } 6. DemoRun it as "Android application", see output.Press "Home" button (on right hand side), and you'll noticed that "HelloWorld" application are deployed successful

Analysis of Android ApiDemos example (1): Create an ApiDemo example

/TableLayout/12. Cell SpanningViews/Lists/1. ArrayViews/Lists/10. Single choice listViews/Lists/11. Multiple choice listViews/Lists/12. TranscriptViews/Lists/13. Slow AdapterViews/Lists/14. Efficient AdapterViews/Lists/2. Cursor (People)Views/Lists/3. Cursor (Phones)Views/Lists/4. ListAdapterViews/Lists/5. SeparatorsViews/Lists/6. ListAdapter CollapsedViews/Lists/7. Cursor (Phones)Views/Lists/8. PhotosViews/Lists/9. Array (Overlay)Views/Progress Bar/1. IncrementalViews/Progress Bar/2. SmoothView

Step-by-step diagram to develop the first Android project and run the See graphics Android---Android Development example tutorial two

I. Build an Android App project1. Running Eclipse.exe2. See3. Enter the interface4. Enter the app, project, package name5. Select the workspace path that the project establishes;6. Configure features such as icons and backgrounds7. Select the Activity's page format8. Set the corresponding name9. Build the ProjectTwo. Project Introduction1. The interface can use the tool to drag the control by dragging. Graphical interface development environment.2. Co

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