Question

我如何使用android.support.v4.app.ActivityCompat.requestPermissions或android.app.Activity.requestPermissions？因为它总是未定义的

我想这样做

var context = android.content.Context;
var wifi_service = application.android.context.getSystemService(context.WIFI_SERVICE);

wifi_service.setWifiEnabled(true);  
var rs = wifi_service.startScan();

console.log(android.support.v4.app.ActivityCompat.requestPermissions); // undefined
console.log(android.support.v4.content.ContextCompat.requestPermissions); // undefined

application.android.registerBroadcastReceiver(
  android.net.wifi.WifiManager.SCAN_RESULTS_AVAILABLE_ACTION,
  function onReceiveCallback(context, intent) {      
     var tp = wifi_service.getScanResults();
     console.log(tp); // empty []
     console.log(tp.size()); // 0
  });

但是数组tp总是空的，我认为因为我需要正确的权限，而在android 6上我们需要问它

我还添加了manifestfile：

<uses-feature android:name="android.hardware.wifi" />
<uses-feature android:name="android.hardware.location" android:required="false" />
<uses-feature android:name="android.hardware.location.network" android:required="false" />
<uses-feature android:name="android.hardware.location.gps" android:required="false" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION" />

还在C上添加：... \ app \ App_Resources \ Android \ app.gradle：

dependencies {
    compile "com.android.support:support-v4:+"
    , compile "com.android.support:appcompat-v7:+"
}

谢谢

Answer 1

您是否尝试删除并添加Android平台？这是一个例子：

tns platform remove android
tns platform add android

Answer 2

要解决此问题，我们需要升级CLI并重新创建应用程序。

我创建了一个新的应用程序，我从一开始就开始工作！ :) 我认为CLI的升级解决了这个问题，我们需要重新创建一个app，因为\ node_modules \ tns-core-modules不一样了

这里是修复扫描结果问题的代码：

    var context = android.content.Context;
    var wifi_service = application.android.context.getSystemService(context.WIFI_SERVICE);
    wifi_service.setWifiEnabled(true);  

    var rs = wifi_service.startScan();

    var hasPermission = android.os.Build.VERSION.SDK_INT < 23;
    if (!hasPermission) {
        hasPermission = android.content.pm.PackageManager.PERMISSION_GRANTED ==
        android.support.v4.content.ContextCompat.checkSelfPermission(application.android.foregroundActivity, android.Manifest.permission.ACCESS_COARSE_LOCATION);
    }

    var ACCESS_COARSE_LOCATION_PERMISSION_REQUEST_CODE = 555;

    if (!hasPermission) {
        android.support.v4.app.ActivityCompat.requestPermissions(
                        application.android.foregroundActivity,
                        [android.Manifest.permission.ACCESS_COARSE_LOCATION],
                        ACCESS_COARSE_LOCATION_PERMISSION_REQUEST_CODE);
    }

    application.android.registerBroadcastReceiver(
            android.net.wifi.WifiManager.SCAN_RESULTS_AVAILABLE_ACTION
            , function onReceiveCallback(context, intent) {    
                var tp = wifi_service.getScanResults();
                console.log(tp);
            });

NativeScript RequestPermission

2 个答案: