Audiomanager class: Adjust the system various volume

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method Parsing: Increase/Decrease volume value

publicvoidadjustStreamVolume(intintint flags)

set the volume value

publicvoidsetStreamVolume(intintint flags)

Parameter Introduction

Streamtype is the type of volume you need to adjust, which can be:
Stream_alarm Alarm
Stream_music Music playback is media volume
Stream_notification window at the top of the status bar NOTIFICATION,
Stream_ring Ringtones
Stream_system system
Stream_voice_call Call
STREAM_DTMF dual tone Multi-frequency

direction is the direction of adjustment, increasing or decreasing, which can be:
Adjust_lower lowering the volume
Adjust_raise Raise the Volume
The adjust_same remains the same, which is used primarily to show the current volume to the user

Flags is a number of additional parameters that describe only two common
Flag_play_sound playing sound when you adjust the volume
FLAG_SHOW_UI Display the volume bar when adjusting

Index is the volume value to set, type int

Sample Code

 Public  class sunactivity extends appcompatactivity implements SeekBar . Onseekbarchangelistener {    Private intVoice_type;PrivateSeekBar Sb_media, sb_calling, Sb_system, Sb_clock;PrivateAudiomanager Audiomanager;Private intStartPoint;@Override    protected void onCreate(Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate);        Setcontentview (R.layout.activity_sun);        Audiomanager = (Audiomanager) getsystemservice (Context.audio_service);        Sb_media = (SeekBar) Findviewbyid (R.id.sb_media);        sb_calling = (SeekBar) Findviewbyid (r.id.sb_ring);        Sb_system = (SeekBar) Findviewbyid (R.id.sb_system); Sb_clock = (SeekBar) Findviewbyid (r.id.sb_alarm);//For Seekbar effect is obvious, the volume value is multiplied by 10 displaySb_media.setprogress (Audiomanager.getstreamvolume (audiomanager.stream_music) *Ten); Sb_calling.setprogress (Audiomanager.getstreamvolume (audiomanager.stream_ring) *Ten); Sb_system.setprogress (Audiomanager.getstreamvolume (audiomanager.stream_system) *Ten); Sb_clock.setprogress (Audiomanager.getstreamvolume (audiomanager.stream_alarm) *Ten); Sb_media.setonseekbarchangelistener ( This); Sb_calling.setonseekbarchangelistener ( This); Sb_system.setonseekbarchangelistener ( This); Sb_clock.setonseekbarchangelistener ( This); }@Override     Public void onprogresschanged(SeekBar SeekBar,intProgressBooleanFromuser) {}@Override     Public void Onstarttrackingtouch(SeekBar SeekBar)    {startPoint = Seekbar.getprogress (); }@Override     Public void Onstoptrackingtouch(SeekBar SeekBar) {Switch(Seekbar.getid ()) { CaseR.id.sb_media:voice_type = Audiomanager.stream_music; Break; CaseR.id.sb_ring:voice_type = audiomanager.stream_ring; Break; CaseR.id.sb_system:voice_type = Audiomanager.stream_system; Break; CaseR.id.sb_alarm:voice_type = Audiomanager.stream_alarm; Break; }//if (seekbar.getprogress () > StartPoint) {//Boost volume//Audiomanager.adjuststreamvolume (Voice_type, audiomanager.adjust_raise, 0);//} else {//Decrease volume//Audiomanager.adjuststreamvolume (Voice_type, audiomanager.adjust_lower, 0);//        }Audiomanager.setstreamvolume (Voice_type, seekbar.getprogress ()/Ten, audiomanager.flag_show_ui); }}

Partial Layout Code

    <linearlayout  android: Layout_width  = "match_parent"  android:layout_ Height  = "wrap_content"  android:gravity  = "center_vertical"  android:orientation  = "horizontal"  android:padding  = "20DP" ;         <textview  android:layout _width  = "wrap_content"  android:layout_height  = "wrap_content"  android:layout_marginright< /span>= "10DP"  android:background  = "@drawable/shape_text"  android:padding  =" 3DP " android:text  =" media " android:textcolor  = "#ffffff" />         <SeekBarandroid:id= "@+id/sb_media"android:layout_width="Match_ Parent "android:layout_height=" wrap_content " />                                        </linearlayout>

Audiomanager class: Adjust the system various volume