小编Ame*_*mza的帖子

错误:看起来应用程序没有访问位置的权限.将以下行添加到应用程序的AndroidManifest.xml中

即使我在manifest.xml中添加了权限并要求运行时权限,我也无法访问GPS.

我的AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.location">

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
.....
.....

完整代码:

import React, { Component } from 'react';
import { Platform, StyleSheet, Text, View,
 PermissionsAndroid } from 'react-native';

export default class App extends Component {
  async requestLocationPermission() {
    try {
      const granted = await PermissionsAndroid.request(
        PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
        {
          'title': 'Location Access Permission',
          'message': 'Expensify would like to use your location ' +
                     'so you we track you.'
        }
      )
      if (granted …

在反应导航抽屉菜单中。我想显示处于我的主要组件状态的用户名“John Doe” 我'Router'如何将 CustomDrawerContentComponent 传递给它。

额外信息：我从 componentDidMount 中的 AsyncStorage 获取此名称

这是我的代码

export default class Router extends Component {
  constructor(props) {
    super(props);
    this.state = {
      employeeName: "John Doe" //<-----How to pass this name to CustomDrawerContentComponent????
    };
  }

  render() {
    return <MyApp />;
  }
}

const MyApp = DrawerNavigator(
  {
    Home: {
      screen: Home
    },
    History: {
      screen: History
    },
    AddDetails: {
      screen: AddDetails
    }
  },
  {
    initialRouteName: "Home",
    drawerPosition: "left",
    contentComponent: CustomDrawerContentComponent,
    drawerOpenRoute: "DrawerOpen",
    drawerCloseRoute: "DrawerClose",
    drawerToggleRoute: "DrawerToggle",
    contentOptions: …

我正在使用反应组件ReactMediaRecorder使用以下代码捕获音频。它返回一个我在我的状态中设置的 blobUrl 。

<ReactMediaRecorder  
  audio
  whenStopped={blobUrl=>this.setState({ blobUrl })}
  render={({ status, startRecording, stopRecording, mediaBlob }) => (
    <div>
      <p>{status}</p>
      <button onClick={startRecording}>Start Recording</button>  
      <button onClick={stopRecording}>Stop Recording</button>  
      <audio src={mediaBlob} controls />  
    </div>  
  )}  
/> 

我的第一个问题是为什么 audio.play() 有效但 audio.duration 返回 NaN ？

let audio = new Audio(mediaBlob);
audio.play(); // this works
audio.duration //but this returns NaN

其次，我想使用rest-api 将此音频上传到我的亚马逊s3 存储。有没有其他方法可以将此 blobUrl 转换为音频，然后将其上传到 s3 存储？