Android 声音分贝控制锁屏demo实现

柔光的暖阳◎ 2023-07-15 07:59 20阅读 0赞

## 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~~

1.  声明权限如下

<uses-permission android:name="android.permission.WAKE_LOCK" />
        
        <uses-permission android:name="android.permission.RECORD_AUDIO" />
        
        <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

1.  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:gerryin@163.com * 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：

1.  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)
            }
        }

1.  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)
        }

1.  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:gerryin@163.com * 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
            }
        }
    }

1.  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~~~