2019-09-26 国产手机安卓拍照和录音权限检查

1.第一步需要进行基础的权限请求，比如用Rxpermission、PermissionsDispatcher、easypermissions进行初步检查

这个检查注意针对原生安卓系统和部分手机进行初步请求

2.部分手机上进行第一步的时候返回了已存在权限，但是实际上没有权限，就需要进行第二部的具体判断了，话不多说，直接上代码

A.拍照权限

class CameraPermissionHelper {
  companion object {
    //是否有拍照权限
    fun hasCameraPermission(): Boolean {
      return try {
        //targetSdkVersion低于23，使用异常捕捉相机权限
        val camera = Camera.open()
        camera.release()
        true
      } catch (e: Exception) {
        e.printStackTrace()
        false
      }
    }
  }
}

B.录音权限

class AudioPermissionHelper {
  companion object {
    //是否有录音权限
    fun hasRecordPermission(): Boolean {
      val minBufferSize = AudioRecord.getMinBufferSize(
        44100,
        AudioFormat.CHANNEL_IN_STEREO,
        AudioFormat.ENCODING_PCM_16BIT
      )
      val audioRecord: AudioRecord? = null
      try {
        audioRecord = AudioRecord(
            MediaRecorder.AudioSource.MIC, 44100,
            AudioFormat.CHANNEL_IN_STEREO,
            AudioFormat.ENCODING_PCM_16BIT, minBufferSize
        )
      } catch (e: Exception) {
        e.printStackTrace()
      }
      if (audioRecord == null) {
        return false
      }
      try {
        // 开始录音
        audioRecord.startRecording()
      } catch (e: Exception) {
        //可能情况一
        audioRecord.release()
        LogUtils.e("MMAudioRecorderPanel hasRecordPermission", e)
      }

      // 检测是否在录音中,6.0以下会返回此状态
      if (audioRecord.recordingState != AudioRecord.RECORDSTATE_RECORDING) {
        //可能情况二
        try {
          audioRecord.stop()
          audioRecord.release()
        } catch (e: Exception) {
          LogUtils.e("MMAudioRecorderPanel hasRecordPermission", e)
        }
        return false
      }
      val bufferSizeInBytes = 1024
      val audioData = ByteArray(bufferSizeInBytes)
      var readSize = 0
      // 正在录音
      readSize = audioRecord.read(audioData, 0, bufferSizeInBytes)
      if (readSize == AudioRecord.ERROR_INVALID_OPERATION || readSize <= 0) {
        return false
      }
      try {
        audioRecord.stop()
        audioRecord.release()
      } catch (e: Exception) {
        LogUtils.e("MMAudioRecorderPanel hasRecordPermission", e)
      }
      return true
    }
  }
}