Android Basics Getting Started tutorial--9.4 using Mediarecord Recording

Android Basics Getting Started tutorial--9.4 using Mediarecord Recording

tags (space delimited): Android Basics Getting Started Tutorial

Introduction to this section

This section is the last section of the Android multimedia Basic API call, which is a simple use of Mediarecord,
The usage is very simple, we write an example to familiarize with the familiar ~

1. Recording Audio using Mediarecord

Operation result :

Implementation Code :

Layout code:activity_main.xml:

<relativelayout  xmlns: Android  = "http://schemas.android.com/apk/res/android"  xmlns:tools  =" Http://schemas.android.com/tools " android:layout_width  = "match_parent"  android:layout_height  =" match_parent " tools:context  =". Mainactivity ";     <buttonandroid:id="@+id/btn_control"android:layout_width="Wrap_ Content "android:layout_height=" Wrap_content "android:text=" Start recording " />                                 </relativelayout>

Mainactivity.java:

 Public  class mainactivity extends appcompatactivity {    PrivateButton Btn_control;Private BooleanIsstart =false;PrivateMediarecorder Mr =NULL;@Override    protected void onCreate(Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate);        Setcontentview (R.layout.activity_main);        Btn_control = (Button) Findviewbyid (R.id.btn_control); Btn_control.setonclicklistener (NewView.onclicklistener () {@Override             Public void OnClick(View v) {if(!isstart)                    {Startrecord (); Btn_control.settext ("Stop Recording"); Isstart =true; }Else{Stoprecord (); Btn_control.settext ("Start Recording"); Isstart =false;    }            }        }); }//Start recording    Private void Startrecord(){if(Mr = =NULL) {File dir =NewFile (Environment.getexternalstoragedirectory (),"Sounds");if(!dir.exists ())            {Dir.mkdirs (); } File soundfile =NewFile (Dir,system.currenttimemillis () +". Amr");if(!soundfile.exists ()) {Try{Soundfile.createnewfile (); }Catch(IOException e)                {E.printstacktrace (); }} Mr =NewMediarecorder (); Mr.setaudiosource (MediaRecorder.AudioSource.MIC);//Audio input sourceMr.setoutputformat (MediaRecorder.OutputFormat.AMR_WB);//Set output formatMr.setaudioencoder (MediaRecorder.AudioEncoder.AMR_WB);//Set encoding formatMr.setoutputfile (Soundfile.getabsolutepath ());Try{Mr.prepare (); Mr.start ();//Start recording}Catch(IOException e)            {E.printstacktrace (); }        }    }//Stop recording, resource release    Private void Stoprecord(){if(Mr! =NULL) {mr.stop ();            Mr.release (); Mr =NULL; }    }}

Finally, don't forget to add the following permissions in Androidmanifest.xml:

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <uses-permission android:name="android.permission.RECORD_AUDIO"/>

Okay, that's so easy.

2. Sample code download for this section

Recorddemo.zip

This section summarizes:

OK, this section is very simple, is the use of Mediarecorder, is probably the most streamlined section of the entire tutorial
Now ~ hehe ~

Android Basics Getting Started tutorial--9.4 using Mediarecord Recording