我正在开发一个应用程序,它应该能够检测设备周围的Wi-Fi网络。我想检测“始终可用的扫描”是否已经打开,但是我找不到方法。我知道这是可能的,因为Google Now实际上已经实现了这一功能。
onCreate()
中): WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if (Build.VERSION.SDK_INT >= 18 ) {
if (wifiManager.isScanAlwaysAvailable()) {
Toast.makeText(this, "Scan always available is on", Toast.LENGTH_SHORT).show();
}
else{
startActivityForResult(new Intent(WifiManager.ACTION_REQUEST_SCAN_ALWAYS_AVAILABLE), 100);
}
}
else{
//Not supported
}
然后,在禁用提示的情况下,使用此代码来捕获用户在提示中做出的决定:
@Override
protected void onActivityResult (int requestCode, int resultCode, Intent data){
if (requestCode == 100) {
if (resultCode == RESULT_OK) {
Toast.makeText(this, "User enabled Scan always available", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "User did not enable Scan always available", Toast.LENGTH_SHORT).show();
}
}
}
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />