權限：<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

import android.app.Activity;import android.content.Context;import android.media.AudioManager;/** * 系統聲音模式設置工具類 * * @author linzhiyong * @time 2017年1月9日15:30:47 * @email [email protected] * @desc */public class AudioManagerUtil {    PRivate Context context;    private AudioManager audioManager;    public AudioManagerUtil(Context context) {        this.context = context;        this.audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);    }    /**     * 設置是否使用揚聲器     * @param on     */    public void setSpeakerphoneOn(boolean on) {        if (on) {            if (this.audioManager.isSpeakerphoneOn()) {                return;            }            this.audioManager.setSpeakerphoneOn(true);        } else {            this.audioManager.setSpeakerphoneOn(false);//關閉揚聲器            this.audioManager.setRouting(AudioManager.MODE_NORMAL, AudioManager.ROUTE_EARPIECE, AudioManager.ROUTE_ALL);            ((Activity) context).setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);            //把聲音設定成Earpiece（聽筒）出來，設定為正在通話中            this.audioManager.setMode(AudioManager.MODE_IN_CALL);        }    }    /**     * 是否是揚聲器模式     * @return     */    public boolean isSpeakerphoneOn() {        return this.audioManager.isSpeakerphoneOn();    }    /**     * 設置靜音 true: 靜音  false: 正常     * @param on     */    public void setSilentOn(boolean on) {        if (on) {            if (this.audioManager.getRingerMode() == AudioManager.RINGER_MODE_SILENT) {                return;            }            this.audioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);        } else {            this.audioManager.setRingerMode(AudioManager.RINGER_MODE_NORMAL);//            this.audioManager.setStreamVolume(AudioManager.RINGER_MODE_NORMAL, ringerVolume, 0);        }    }    /**     * 是否是靜音模式     * @return     */    public boolean isSlientOn() {        return this.audioManager.getRingerMode() == AudioManager.RINGER_MODE_SILENT                || this.audioManager.getRingerMode() == AudioManager.RINGER_MODE_VIBRATE;    }}