Android 自定义SeekBar动态改变硬件音量大小实现和音量键的同步(推荐)

1，上图：

2，代码：

mainactivity.java

package com.hero.zhaoq.seekbarchangeddemo;
import android.content.broadcastreceiver;
import android.content.context;
import android.content.intent;
import android.content.intentfilter;
import android.database.contentobserver;
import android.media.audiomanager;
import android.os.handler;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.util.log;
import android.widget.seekbar;
/**
 * android实现 seekbar更新音量 并实现 和硬件同步
 */
public class mainactivity extends appcompatactivity {
 private seekbar seekbar_video;
 private contentobserver mvoiceobserver;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  audiomanager audiomanager = (audiomanager) getsystemservice(context.audio_service);//获取媒体系统服务
  seekbar_video= (seekbar) findviewbyid(r.id.seekbar_video);//注册id
  seekbar_video.setmax(15);//设置最大音量
  seekbar_video.setprogress(audiomanager.getstreamvolume(audiomanager.stream_music));// 当前的媒体音量
  myregisterreceiver();//注册同步更新的广播
  log.i("lyj_ring", "mvoiceseekbar max voluem = "+audiomanager.getstreammaxvolume(audiomanager.stream_system));
  seekbar_video.setonseekbarchangelistener(new seekbar.onseekbarchangelistener() {
   public void onstoptrackingtouch(seekbar arg0) {
   }
   public void onstarttrackingtouch(seekbar arg0) {
   }
   public void onprogresschanged(seekbar arg0, int arg1, boolean arg2) {
    audiomanager audiomanager = (audiomanager) getsystemservice(context.audio_service);
    log.v("lyj_ring", "mvoiceseekbar max progress = "+arg1);
    //系统音量和媒体音量同时更新
    audiomanager.setstreamvolume(audiomanager.stream_system, arg1, 0);
    audiomanager.setstreamvolume(3, arg1, 0);// 3 代表 audiomanager.stream_music
   }
  });
  mvoiceobserver = new contentobserver(new handler()) {
   @override
   public void onchange(boolean selfchange) {
    super.onchange(selfchange);
    audiomanager audiomanager = (audiomanager) getsystemservice(context.audio_service);
    seekbar_video.setprogress(audiomanager.getstreamvolume(audiomanager.stream_system));
    //或者你也可以用媒体音量来监听改变，效果都是一样的。
    //mvoiceseekbar.setprogress(audiomanager.getstreamvolume(audiomanager.stream_music));
   }
  };
 }
 private void myregisterreceiver(){
  myvolumereceiver mvolumereceiver = new myvolumereceiver() ;
  intentfilter filter = new intentfilter() ;
  filter.addaction("android.media.volume_changed_action") ;
  registerreceiver(mvolumereceiver, filter) ;
 }
 /**
  * 处理音量变化时的界面显示
  * @author long
  */
 private class myvolumereceiver extends broadcastreceiver {
  @override
  public void onreceive(context context, intent intent) {
   //如果音量发生变化则更改seekbar的位置
   if(intent.getaction().equals("android.media.volume_changed_action")){
    audiomanager maudiomanager = (audiomanager) context.getsystemservice(context.audio_service);
    int currvolume = maudiomanager.getstreamvolume(audiomanager.stream_music) ;// 当前的媒体音量
    seekbar_video.setprogress(currvolume) ;
   }
  }
 }
}

main_activity.xml:

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/ringtone_seekbar_parent"
 android:layout_width="match_parent"
 android:layout_height="160px"
 android:layout_margintop="0dip"
 android:layout_weight="1"
 android:gravity="center_vertical"
 android:orientation="horizontal" >
 <seekbar
  android:id="@+id/seekbar_video"
  android:layout_width="match_parent"
  android:layout_height="25dp"
  android:max="0"
  android:progress="0"
  android:progressdrawable="@drawable/seekbar_progress_layer_list"
  android:thumb="@mipmap/play_seekbar_icon"
  android:layout_weight="18"/>
</linearlayout>

seekbar_progress_layer_list.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list
 xmlns:android="http://schemas.android.com/apk/res/android">
 <!--未选中 状态-->
 <item android:id="@android:id/background"
  android:drawable="@mipmap/volumn_bg" />
 <!--<!–选中状态–>-->
 <item android:id="@android:id/progress">
  <scale android:drawable="@mipmap/volumn_primary" android:scalewidth="100%" />
 </item>
</layer-list>

不是你不会只是你不知道而已……..

整个代码实现很简单。 笔者不在赘述。

注： 打开demo，打开歌曲。滑动seekbar即可改音量大小。

maybe你更需要这个：

源码：

https://github.com/229457269/seekbarchangedvoicedemo

参考：android seekbar（自定义）控制音量同步更新

以上所述是小编给大家介绍的android 自定义seekbar动态改变硬件音量大小实现和音量键的同步(推荐)，希望对大家有所帮助