android - 如何检查设备是否具有 GSM 或 GPS 功能？

Question

我尝试上传关闭 GPS 并启用“平面模式”的应用程序，但由于导致Galaxy Tab Wi-Fi(M180W)的错误而被拒绝。所以我需要一些帮助来确定设备是否具有平面模式功能或 GPS。

全球定位系统：

//gps
        final LocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );
        appPrefs.setGPS(manager.isProviderEnabled( LocationManager.GPS_PROVIDER));
        if (manager.isProviderEnabled( LocationManager.GPS_PROVIDER) && manager!=null){
        Intent myIntent = new Intent( Settings.ACTION_LOCATION_SOURCE_SETTINGS );
        startActivity(myIntent);
        Toast toast = Toast.makeText(getApplicationContext(), "Please turn off GPS and hit back", Toast.LENGTH_LONG);
        toast.show();

平面模式：

// plane mode
        if (option){
            appPrefs.setCBoption(true);
            // read the airplane mode setting
            boolean isEnabled = Settings.System.getInt(
                      getApplicationContext().getContentResolver(), 
                      Settings.System.AIRPLANE_MODE_ON, 0) == 1;

            // toggle airplane mode
            Settings.System.putInt(
                    getApplicationContext().getContentResolver(),
                      Settings.System.AIRPLANE_MODE_ON, isEnabled ? 0 : 1);

            // Post an intent to reload
            Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
            intent.putExtra("state", !isEnabled);
            sendBroadcast(intent);

Answer 1

对于 GSM ：

TelephonyManager manager = (TelephonyManager) getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE);

if (manager.getPhoneType() == TelephonyManager.PHONE_TYPE_GSM)

全球定位系统：

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

ArrayList<String> names = (ArrayList<String>) locationManager.getProviders(false);

如果名称为空，则您没有 GPS

Answer 2

听起来你想使用PackageManager.hasSystemFeature(...).

/** Returns true if this device has support for GSM, otherwise false. */
public static boolean hasGsmSupport(Context context) {
    PackageManager pm = context.getPackageManager();
    return pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY_GSM);
}

和...

/** Returns true if this device has support for GPS, otherwise false. */
public static boolean hasGpsSupport(Context context) {
    PackageManager pm = context.getPackageManager();
    return pm.hasSystemFeature(PackageManager.FEATURE_LOCATION_GPS);
}