Android音量调节

1、准备工作

//初始化音频管理器
AudioManager mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
//获取系统最大音量
int maxVolume=mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC)；
// 获取设备当前音量
int currentVolume =mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
// 设置seekbar的最大值
sbVolume.setMax(maxVolume);
// 显示音量
sbVolume.setProgress(currentVolume);

2、开始调节

调节音量有两种方式一种是渐进式,即像手动按音量键一样,一步一步增加或减少,另一种是直接设置音量值

1. 渐进式

public void adjustStreamVolume (int streamType, int direction, int flags)
//减少音量
mAudioManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,AudioManager.ADJUST_LOWER,AudioManager.FX_FOCUS_NAVIGATION_UP);
//增加电量
mAudioManager.adjustStreamVolume (AudioManager.STREAM_MUSIC, AudioManager.ADJUST_RAISE,AudioManager.FX_FOCUS_NAVIGATION_UP)

第一个streamType是需要调整音量的类型,这里设的是媒体音量,可以是:

STREAM_ALARM 警报
STREAM_MUSIC 音乐回放即媒体音量
STREAM_NOTIFICATION 窗口顶部状态栏Notification,
STREAM_RING 铃声
STREAM_SYSTEM 系统
STREAM_VOICE_CALL 通话
STREAM_DTMF 双音多频,不是很明白什么东西

第二个direction,是调整的方向,增加或减少,可以是:

ADJUST_LOWER 降低音量
ADJUST_RAISE 升高音量
ADJUST_SAME 保持不变,这个主要用于向用户展示当前的音量

第三个flags是一些附加参数,只介绍两个常用的

FLAG_PLAY_SOUND 调整音量时播放声音

FLAG_SHOW_UI 调整时显示音量条,就是按音量键出现的那个

2. 直接设置

public void setStreamVolume (int streamType, int index, int flags)
mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC), AudioManager.FLAG_PLAY_SOUND);
//得到听筒模式的最大值
mAudioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);
//得到听筒模式的当前值
mAudioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL);

3、兼用安卓7.0以上全代码

1. Activity

package com.example.android_text;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.widget.SeekBar;

import com.example.android_text.common.BaseActivity;

public class SoundSettingsActivity extends BaseActivity {

    AudioManager mAudioManager;
    SeekBar linShengBar;
    SeekBar tongHuaBar;
    private static  int REQUEST_CODE_READ_CONTACTS= 123;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sound_settings);

        //获取系统的声音设置
        mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        linShengBar=findViewById(R.id.linShengBar);
        tongHuaBar=findViewById(R.id.tongHuaBar);
        initView();
        qx();
    }

    private void initView() {
       /*//系统音量
        max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_SYSTEM );
        current = mAudioManager.getStreamVolume( AudioManager.STREAM_SYSTEM );
        Log.d("SYSTEM", "max : " + max + " current : " + current);

        //音乐音量
        max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_MUSIC );
        current = mAudioManager.getStreamVolume( AudioManager.STREAM_MUSIC );
        Log.d("MUSIC", "max : " + max + " current : " + current);

        //提示声音音量
        max = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_ALARM );
        current = mAudioManager.getStreamVolume( AudioManager.STREAM_ALARM );
        Log.d("ALARM", "max : " + max + " current : " + current);*/



        //通话音量
        int tongMax = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_VOICE_CALL );
        int tongCurrent = mAudioManager.getStreamVolume( AudioManager.STREAM_VOICE_CALL );
        Log.d("VIOCE_CALL", "max : " + tongMax + " current : " + tongCurrent);

        tongHuaBar.setMax(tongMax);//tongHuaBar最大通话声音值
        tongHuaBar.setProgress(tongCurrent);//设置当前声音值
        tongHuaBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                Log.i("SoundSettingsActivity", "tongHuaBar  i: "+i+"     b:"+b);
                mAudioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL, i, 0);

                int tongMax = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_VOICE_CALL );
                int tongCurrent = mAudioManager.getStreamVolume( AudioManager.STREAM_VOICE_CALL );
                Log.d("VIOCE_CALL", "max : " + tongMax + " current : " + tongCurrent);
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });




        //铃声音量
        int linMax = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_RING );
        int linCurrent = mAudioManager.getStreamVolume( AudioManager.STREAM_RING );
        Log.d("RING", "max : " + linMax + " current : " + linCurrent);

        linShengBar.setMax(linMax);
        linShengBar.setProgress(linCurrent);
       linShengBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
           @Override
           public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

               Log.i("SoundSettingsActivity", "linShengBar: i: "+i+"     b:"+b);
               mAudioManager.setStreamVolume(AudioManager.STREAM_RING, i, 0);

               int linMax = mAudioManager.getStreamMaxVolume( AudioManager.STREAM_RING );
               int linCurrent = mAudioManager.getStreamVolume( AudioManager.STREAM_RING );
               Log.d("RING", "max : " + linMax + " current : " + linCurrent);
           }

           @Override
           public void onStartTrackingTouch(SeekBar seekBar) {

           }

           @Override
           public void onStopTrackingTouch(SeekBar seekBar) {

           }
       });

    }

    private void qx(){
        //android7.0以上  当您运行startActivity()时,Android会打开您的应用的免打扰访问设置.
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N
                && !notificationManager.isNotificationPolicyAccessGranted()) {
            Intent intent = new Intent(
                    android.provider.Settings
                            .ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS);
            startActivity(intent);
        }

        //获取权限
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
                && ActivityCompat.checkSelfPermission(SoundSettingsActivity.this,
                Manifest.permission.READ_CONTACTS)
                == PackageManager.PERMISSION_DENIED) {

            ActivityCompat.requestPermissions(SoundSettingsActivity.this,
                    new String[]{ Manifest.permission.READ_CONTACTS },
                    REQUEST_CODE_READ_CONTACTS);
        }
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.i("abcd", "requestCode:"+requestCode);
        if(requestCode==REQUEST_CODE_READ_CONTACTS){
            Log.i("abcd", "以获取权限");
        }
    }

}

2. xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".SoundSettingsActivity">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="铃声音量"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="(1)-"/>
        <SeekBar
            android:id="@+id/linShengBar"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:max="100"
            android:progress="0"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="(2)+"/>
    </LinearLayout>


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="通话音量"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="(4)-"/>
        <SeekBar
            android:id="@+id/tongHuaBar"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:max="100"
            android:progress="0"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="5dp"
            android:text="(5)+"/>
    </LinearLayout>
</LinearLayout>