Android 声音分贝控制锁屏demo实现
标题demo实现总体逻辑:
1. 声明权限
2. 声明，注册 receiver，接收注册设别管理器结果
3. 完成注册APP为设备管理器
4. 录音权限申请
5. 编写类文件,实现业务逻辑
OK，我们开始~~
- 声明权限如下
<!--锁屏权限 需要注册为设备管理器-->
<uses-permission android:name="android.permission.WAKE_LOCK" />
<!--录音权限-->
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<!--设置锁屏密码-->
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />
- 声明，注册 receiver，接收注册设别管理器结果
广播接收器类文件如下：
/**
* com.gerryrun.gerryandroiddemo.testdemo.lockscreen
* create by GerryRun
* email:[email protected]
* 2020-03-14 21:20
* Describe here: 广播接收器：receiver，接收注册设别管理器结果
*/
class MyAdminReceiver : DeviceAdminReceiver() {
fun showToast(context: Context, msg: String) {
Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}
override fun onEnabled(context: Context, intent: Intent) {
showToast(
context,
"设备管理器激活成功"
);
}
override fun onDisabled(context: Context, intent: Intent) {
showToast(
context,
"设备管理器激活失败"
);
}
}
注册广播接收器：
<receiver
android:name=".testdemo.lockscreen.MyAdminReceiver"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data
android:name="android.app.device_admin"
android:resource="@xml/lock_screen" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
- 完成注册APP为设备管理器
/**
* 检测并去激活设备管理器权限
*/
fun CheckAdminPermission() {
var mComponentName = ComponentName(this, MyAdminReceiver::class.java)
var dmp: DevicePolicyManager =
getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
var who = ComponentName(mActivity, MyAdminReceiver::class.java)
if (dmp.isAdminActive(who)) {
showToast("已拥有设备管理权限")
runVoiceRecord()
} else {
var intent =
Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mComponentName)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "开启后就可以使用锁屏功能了...")
startActivity(intent)
}
}
- 录音权限申请
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(
arrayOf(Manifest.permission.RECORD_AUDIO),
REQUEST_ASK_RECORD_AUDIO
)
return
}
}
权限回调:
override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<out String>,
grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
when (requestCode) {
REQUEST_ASK_RECORD_AUDIO -> {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
showToast("权限申请成功")
//开始 获取声音分贝逻辑
runVoiceRecord()
} else {
showToast("权限申请失败")
}
}
}
}
runVoiceRecord()方法:
private fun runVoiceRecord() {
var dmp: DevicePolicyManager =
getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
mHandler = Handler(Handler.Callback {
if (it.what == 1) {
var voice: Double = it.obj as Double
if (voice > 30) {
var who = ComponentName(mActivity, MyAdminReceiver::class.java)
if (dmp.isAdminActive(who)) {
dmp.lockNow()
finish()
} else {
var intent = Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
var mcomponentName = ComponentName(mActivity, MyAdminReceiver::class.java)
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mcomponentName)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "请打开管理员权限")
mActivity.startActivity(intent)
}
}
}
return@Callback false
})
mAudioRecordManager = AudioRecordManager(mHandler, 1)
mAudioRecordManager?.getNoiseLevel(true)
}
- 编写类文件,实现业务逻辑
话筒管理类:AudioRecordManager
/**
* com.gerryrun.gerryandroiddemo.testdemo.lockscreen
* create by GerryRun
* email:[email protected]
* 2020-03-14 21:22
* Describe here: 话筒管理类
*/
class AudioRecordManager {
private var thread: Thread? = null
/**
* 是否 使用 handler发送音量消息
*/
var mCanSendMsg: Boolean = true
val TAG = "AudioRecordManager"
//通道配置
var SAMPLE_RATE_IN_SIZE = 44100
var BUFFER_SIZE = AudioRecord.getMinBufferSize(
SAMPLE_RATE_IN_SIZE,
AudioFormat.CHANNEL_IN_DEFAULT,
AudioFormat.ENCODING_PCM_16BIT
)
//话筒类
var mAudioRecord: AudioRecord? = null
//是否正在录音
var isVoiceRun = false
var mHandler: Handler? = null
var mWhat = 0
//锁对象
lateinit var mLock: Object
/**
* 构造方法
*/
constructor(handler: Handler, what: Int) {
mHandler = handler
mWhat = what
mLock = Object()
}
// 获取声音分贝
fun getNoiseLevel(canSendMsg: Boolean) {
if (isVoiceRun) return
mCanSendMsg = canSendMsg
isVoiceRun = true
thread = object : Thread() {
override fun run() {
//死循环
while (isVoiceRun) {
if (mCanSendMsg) {
/**
* 初始化 话筒类
*/
if (null == mAudioRecord)
mAudioRecord = AudioRecord(
MediaRecorder.AudioSource.MIC,
SAMPLE_RATE_IN_SIZE,
AudioFormat.CHANNEL_IN_DEFAULT,
AudioFormat.ENCODING_PCM_16BIT, BUFFER_SIZE
)
if (mAudioRecord == null) throw NullPointerException("话筒类初始化失败")
var buffer = ShortArray(BUFFER_SIZE)
/**
* 不少机型 调用此方法会报错，所以try catch捕获一下
*/
try {
mAudioRecord?.startRecording()
} catch (e: IllegalStateException) {
e.printStackTrace()
}
var r = mAudioRecord?.read(buffer, 0, BUFFER_SIZE)
var v = 0
for (i in 0 until buffer.size) {
v += buffer[i] * buffer[i]
}
/**
* 平方和 除以数据总长度,得到音量的大小
*/
if (r == null) {
return
}
var mean: Double = (v / (r!!.toDouble()))
var volume = 10 * log10(mean)
if (!this.isInterrupted)
synchronized(mLock) {
mLock.wait(500)
doSendMsg(volume)
}
}
}
}
}
thread?.start()
}
/**
* 向activity发送声音分贝信息
*/
fun doSendMsg(volume: Double) {
var msg: Message = Message.obtain()
msg.what = mWhat
msg.obj = volume
Log.e(TAG, "volume==$volume")
mHandler?.sendMessage(msg)
}
/**
* 停止录音
*/
fun stopRecord(canSendMsg: Boolean) {
mCanSendMsg = canSendMsg
Log.e(TAG, "null != thread==" + (null != thread))
if (null != thread) {
/**
* 停止线程方法:
* Thread.interrupt()方法
*
* Thread.stop()方法因为不安全，已被弃用,直接调用会boom，
*
*/
thread!!.interrupt()
}
thread = null
/**
* 释放 音频采集对象
*/
if (null != mAudioRecord) {
mAudioRecord?.release()
mAudioRecord = null
}
}
}
- 实现业务逻辑
private fun runVoiceRecord() {
/**
* 获取 DevicePolicyManager 对象
*/
var dmp: DevicePolicyManager =
getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
mHandler = Handler(Handler.Callback {
if (it.what == 1) {
var voice: Double = it.obj as Double
if (voice > 30) {
//判断当前app是否为设备管理器
var who = ComponentName(mActivity, MyAdminReceiver::class.java)
if (dmp.isAdminActive(who)) {
//锁屏
dmp.lockNow()
finish()
} else {
//跳转设备管理器注册页面
var intent = Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
var mcomponentName = ComponentName(mActivity, MyAdminReceiver::class.java)
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mcomponentName)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "请打开管理员权限")
mActivity.startActivity(intent)
}
}
}
return@Callback false
})
//初始化 AudioRecordManager 对象
mAudioRecordManager = AudioRecordManager(mHandler, 1)
//开始获取声音分贝
mAudioRecordManager?.getNoiseLevel(true)
}
如此，所有逻辑已完成，下面奉上整个activity文件：
class LockScreenActivity : BaseActivity<ActivityLockScreenBinding>() {
private var mAudioRecordManager: AudioRecordManager? = null
private lateinit var mHandler: Handler
var REQUEST_ASK_RECORD_AUDIO = 1001
override fun getContentViewId(): Int {
return R.layout.activity_lock_screen
}
override fun initTheView() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(
arrayOf(Manifest.permission.RECORD_AUDIO),
REQUEST_ASK_RECORD_AUDIO
)
return
}
}
CheckAdminPermission()
}
private fun runVoiceRecord() {
/**
* 获取 DevicePolicyManager 对象
*/
var dmp: DevicePolicyManager =
getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
mHandler = Handler(Handler.Callback {
if (it.what == 1) {
var voice: Double = it.obj as Double
if (voice > 30) {
//判断当前app是否为设备管理器
var who = ComponentName(mActivity, MyAdminReceiver::class.java)
if (dmp.isAdminActive(who)) {
//锁屏
dmp.lockNow()
finish()
} else {
//跳转设备管理器注册页面
var intent = Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
var mcomponentName = ComponentName(mActivity, MyAdminReceiver::class.java)
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mcomponentName)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "请打开管理员权限")
mActivity.startActivity(intent)
}
}
}
return@Callback false
})
//初始化 AudioRecordManager 对象
mAudioRecordManager = AudioRecordManager(mHandler, 1)
//开始获取声音分贝
mAudioRecordManager?.getNoiseLevel(true)
}
override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<out String>,
grantResults: IntArray
) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
when (requestCode) {
REQUEST_ASK_RECORD_AUDIO -> {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
showToast("权限申请成功")
//开始 获取声音分贝逻辑
runVoiceRecord()
} else {
showToast("权限申请失败")
}
}
}
}
/**
* 检测并去激活设备管理器权限
*/
fun CheckAdminPermission() {
var mComponentName = ComponentName(this, MyAdminReceiver::class.java)
var dmp: DevicePolicyManager =
getSystemService(Context.DEVICE_POLICY_SERVICE) as DevicePolicyManager
var who = ComponentName(mActivity, MyAdminReceiver::class.java)
if (dmp.isAdminActive(who)) {
showToast("已拥有设备管理权限")
runVoiceRecord()
} else {
var intent =
Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, mComponentName)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, "开启后就可以使用锁屏功能了...")
startActivity(intent)
}
}
override fun onDestroy() {
super.onDestroy()
mAudioRecordManager!!.stopRecord(false)
mAudioRecordManager = null
}
}
至此，demo实现完毕，务必轻喷哦~~~