无法启动接收器com.example.callrecorder.CallReciever：java.lang.RuntimeException：启动失败。媒体记录器无法正常工作

Question

我正在开发一个用于通话录音的应用程序。在 Main Activity 中，我要求获得录制通话所需的所有权限。在广播接收器中，我分别处理传入和传出呼叫以及录音。但应用程序显示错误，表明媒体记录器无法启动。据我了解，在声明文件路径之前代码运行良好。当我声明 filepath 时，应用程序在接到电话时崩溃。我认为 Definefilepath() 中存在一些问题，或者我调用它的时间不对。

广播接收器代码

CallReciever 类：BroadcastReceiver() {

private val mediaRecorder = MediaRecorder()
lateinit var filePath : String

override fun onReceive(context: Context?, intent: Intent?) {

    if(intent?.action == TelephonyManager.ACTION_PHONE_STATE_CHANGED){
        val state = intent.getStringExtra(TelephonyManager.EXTRA_STATE)
        when(state){
            TelephonyManager.EXTRA_STATE_RINGING->{
                //Handle incoming call - start recording
                val incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER)
                callRecorder()
                Log.i("anshi","call recieved and Call Recording is going on")
            }

            TelephonyManager.EXTRA_STATE_OFFHOOK->{//perform actions when an outgoing call is answered
                //Handle call answered - store recording
               callRecorder()
                Log.i("anshi","call outgoing and Call Recording is going on")
            }
            TelephonyManager.EXTRA_STATE_IDLE->{//perform actions when a call ends.
                //Handle call ended - end recording
                Log.i("anshi","call has ended")
                mediaRecorder.stop()
                mediaRecorder.reset()
                mediaRecorder.release()

            }
        }
    }
}



private fun defineFilePath() {
    val directory = File(Environment.getExternalStorageDirectory(), "Recordings")
    directory.mkdirs()

    val fileName = "recording_${System.currentTimeMillis()}.mp3"
    filePath = File(directory, fileName).absolutePath
    Log.i("anshi","defined file path")
}

private fun callRecorder() {

    defineFilePath()

    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL)
    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC)
    mediaRecorder.setOutputFile(filePath)

    try {
        // Prepare the MediaRecorder
        mediaRecorder.prepare()

        // Start the recording
        mediaRecorder.start()

    } catch (e: IOException) {
        // Handle any exceptions that occur during recording
    }
}

}

Answer 1

正如 @Robert 所说，通话录音在最近的 Android 版本上存在问题。

我收到了制作通话录音应用程序的任务，我现在该怎么做？

现在，您可以在最新的 Android 版本上使用辅助功能服务来执行此操作。但这样你就无法将你的应用程序发布到 Play 商店