Android 一体机研发之修改系统设置————声音

Android 一体机研发之修改系统设置————屏幕亮度

Android 一体机研发之修改系统设置————声音

Android 一体机研发之修改系统设置————自动锁屏

修改系统设置系列篇章马上开张了！ 本章将为大家细节讲解声音。

对于声音功能大家都不陌生，在多媒体时代，它是很必要的，同样也是缺它不可的版块；而在一体机实际应用中，这里更改的是媒体音量。

声音

几个常见的 “音量类型”： STREAM_VOICE_CALL 通话、STREAM_SYSTEM 系统、STREAM_RING 铃声、 STREAM_MUSIC 媒体音量、STREAM_ALARM 闹钟、STREAM_NOTIFICATION 通知。

设计思路

1. 获取音频管理器
2. 获取媒体音量最大值
3. 获取系统当前媒体音量
4. 通过seekBar设置系统媒体音量

具体实现

获取音频管理器

• Java

 AudioManager mAudioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);

• Kotlin

mAudioManager = this.getSystemService(Context.AUDIO_SERVICE) as AudioManager

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获取媒体音量最大值

• Java

mMaxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);

• Kotlin

mMaxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC)

---

获取系统当前媒体音量

• Java

/*** 获取系统媒体音量* STREAM_VOICE_CALL 通话* STREAM_SYSTEM 系统* STREAM_RING 铃声* STREAM_MUSIC 媒体音量* STREAM_ALARM 闹钟* STREAM_NOTIFICATION 通知*/
mCurrentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);

• Kotlin

mCurrentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC)

---

设置系统媒体音量

• Java

	voiceBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {Log.e("进度显示 >>>", "onProgressChanged: " + progress);//设置系统媒体音量setStreamVolume(progress);}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});/*** 设置系统媒体音量* setStreamVolume 直接设置音量* adjustStreamVolume 步长式设置音量，即10,20,30这样阶梯式* <p>* 参数1：音量类型* 参数2：音量数值* 参数3：* AudioManager.FLAG_SHOW_UI 调整音量时显示系统音量进度条 , 0 则不显示* AudioManager.FLAG_ALLOW_RINGER_MODES 是否铃声模式* AudioManager.FLAG_VIBRATE 是否震动模式* AudioManager.FLAG_SHOW_VIBRATE_HINT 震动提示* AudioManager.FLAG_SHOW_SILENT_HINT 静音提示* AudioManager.FLAG_PLAY_SOUND 调整音量时播放声音*/private void setStreamVolume(int volume) {mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_PLAY_SOUND);}

• Kotlin

	seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {Log.i("onProgressChanged----", "" + progress)mCurrentVolume = progress//更新页面updateNum(mCurrentVolume)//设置媒体音量setStreamVolume(mCurrentVolume)}override fun onStartTrackingTouch(seekBar: SeekBar?) {}override fun onStopTrackingTouch(seekBar: SeekBar?) {}})/*** 更新页面显示*/private fun updateNum(volume: Int) {//tv_volume.text = volume.toString()seekBar.progress = volume}/*** 设置系统媒体音量*/private fun setStreamVolume(volume: Int) {mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_SHOW_UI)}

---

监听系统按键

	//监听系统按键@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {switch (keyCode) {case KeyEvent.KEYCODE_VOLUME_DOWN:if (mCurrentVolume > 0) {mCurrentVolume--;} else {mCurrentVolume = 0;}voiceBar.setProgress(mCurrentVolume);setStreamVolume(mCurrentVolume);Log.e("音量减 >>", "onKeyDown: " + mCurrentVolume );return true;case KeyEvent.KEYCODE_VOLUME_UP:if (mCurrentVolume < mMaxVolume) {mCurrentVolume++;} else {mCurrentVolume = mMaxVolume;}voiceBar.setProgress(mCurrentVolume);setStreamVolume(mCurrentVolume);Log.e("音量加 >>", "onKeyDown: " + mCurrentVolume );return true;/* case KeyEvent.KEYCODE_VOLUME_MUTE:return true;*/}return super.onKeyDown(keyCode, event);}

完整操作

• Java

/*** @author 拉莫帅* @date 2023/2/8* @address* @Desc 修改系统声音（媒体声音）*/
public class ChangeVoiceActivity extends AppCompatActivity {private AudioManager mAudioManager;private SeekBar voiceBar;//当前音量private int mCurrentVolume = 0;//最大音量private int mMaxVolume = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_chanage_voice);init();}private void init() {voiceBar = findViewById(R.id.voiceBar);ImageView back = findViewById(R.id.back);TextView title = findViewById(R.id.title);title.setText("声音");mAudioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);/*** 获取系统媒体音量* STREAM_VOICE_CALL 通话* STREAM_SYSTEM 系统* STREAM_RING 铃声* STREAM_MUSIC 媒体音量* STREAM_ALARM 闹钟* STREAM_NOTIFICATION 通知*/mCurrentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);//获取媒体音量最大值mMaxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);Log.e("进度 >>", "init: " + mCurrentVolume + "---" + mMaxVolume);voiceBar.setMax(mMaxVolume);//更新进度条voiceBar.setProgress(mCurrentVolume);back.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {finish();}});voiceBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {Log.e("进度显示 >>>", "onProgressChanged: " + progress);setStreamVolume(progress);}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {}});}//监听系统按键@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {switch (keyCode) {case KeyEvent.KEYCODE_VOLUME_DOWN:if (mCurrentVolume > 0) {mCurrentVolume--;} else {mCurrentVolume = 0;}voiceBar.setProgress(mCurrentVolume);setStreamVolume(mCurrentVolume);Log.e("音量减 >>", "onKeyDown: " + mCurrentVolume );return true;case KeyEvent.KEYCODE_VOLUME_UP:if (mCurrentVolume < mMaxVolume) {mCurrentVolume++;} else {mCurrentVolume = mMaxVolume;}voiceBar.setProgress(mCurrentVolume);setStreamVolume(mCurrentVolume);Log.e("音量加 >>", "onKeyDown: " + mCurrentVolume );return true;/* case KeyEvent.KEYCODE_VOLUME_MUTE:return true;*/}return super.onKeyDown(keyCode, event);}/*** 设置系统媒体音量* setStreamVolume 直接设置音量* adjustStreamVolume 步长式设置音量，即10,20,30这样阶梯式* <p>* 参数1：音量类型* 参数2：音量数值* 参数3：* AudioManager.FLAG_SHOW_UI 调整音量时显示系统音量进度条 , 0 则不显示* AudioManager.FLAG_ALLOW_RINGER_MODES 是否铃声模式* AudioManager.FLAG_VIBRATE 是否震动模式* AudioManager.FLAG_SHOW_VIBRATE_HINT 震动提示* AudioManager.FLAG_SHOW_SILENT_HINT 静音提示* AudioManager.FLAG_PLAY_SOUND 调整音量时播放声音*/private void setStreamVolume(int volume) {mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_PLAY_SOUND);}
}

• Kotlin

class VolumeActivity : AppCompatActivity() {//音频管理器private lateinit var mAudioManager: AudioManager//当前音量private var mCurrentVolume: Int = 0//最大音量private var mMaxVolume: Int = 0override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_volume)init()setListener()}@SuppressLint("SetTextI18n")private fun init() {mAudioManager = this.getSystemService(Context.AUDIO_SERVICE) as AudioManager/*** ringerMode 音量模式* RINGER_MODE_NORMAL 正常* RINGER_MODE_SILENT 静音* RINGER_MODE_VIBRATE 震动*/when (mAudioManager.ringerMode) {AudioManager.RINGER_MODE_NORMAL -> tv_mode.text = "当前音量模式：正常"AudioManager.RINGER_MODE_SILENT -> tv_mode.text = "当前音量模式：静音"AudioManager.RINGER_MODE_VIBRATE -> tv_mode.text = "当前音量模式：震动"}/*** 获取系统媒体音量* STREAM_VOICE_CALL 通话* STREAM_SYSTEM 系统* STREAM_RING 铃声* STREAM_MUSIC 媒体音量* STREAM_ALARM 闹钟* STREAM_NOTIFICATION 通知*/mCurrentVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC)//获取媒体音量最大值mMaxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC)seekBar.max = mMaxVolumetv_max.text = "最大音量：$mMaxVolume"updateNum(mCurrentVolume)}private fun setListener() {btn_mode.setOnClickListener {mAudioManager.ringerMode = AudioManager.RINGER_MODE_NORMALtv_mode.text = "当前音量模式：正常"}seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {Log.i("onProgressChanged----", "" + progress)mCurrentVolume = progressupdateNum(mCurrentVolume)setStreamVolume(mCurrentVolume)}override fun onStartTrackingTouch(seekBar: SeekBar?) {}override fun onStopTrackingTouch(seekBar: SeekBar?) {}})}/*** 更新页面显示*/private fun updateNum(volume: Int) {tv_volume.text = volume.toString()seekBar.progress = volume}/*** 设置系统媒体音量* setStreamVolume 直接设置音量* adjustStreamVolume 步长式设置音量，即10,20,30这样阶梯式** 参数1：音量类型* 参数2：音量数值* 参数3：*      AudioManager.FLAG_SHOW_UI 调整音量时显示系统音量进度条 , 0 则不显示*      AudioManager.FLAG_ALLOW_RINGER_MODES 是否铃声模式*      AudioManager.FLAG_VIBRATE 是否震动模式*      AudioManager.FLAG_SHOW_VIBRATE_HINT 震动提示*      AudioManager.FLAG_SHOW_SILENT_HINT 静音提示*      AudioManager.FLAG_PLAY_SOUND 调整音量时播放声音*/private fun setStreamVolume(volume: Int) {mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, volume, AudioManager.FLAG_SHOW_UI)}

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