Question

在我的应用程序中，我使用“apn”进行GPRS连接显示。我编写了一个微调器，我在其中获得了Telenor GPRS，Telenor MMS和Telenor WAP。 **我想在这个微调器中添加Wi-Fi选项。当我选择Wi-Fi选项设备时，开始感应Wi-Fi。

问：如何在我的微调器中添加Wi-Fi选项？ ** 这是我的代码

Spinner GPRS;
String [] name_of_GPRS__available;
int [] apn_id;         public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.configuration); 

    EnumerateAPNs();

   /* this is a android enviroment in which you can develop an android application in which you 
    * share all your basic necessities of thrkife bghhr4y2ghrrr*/

    this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
    tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

    GPRS = (Spinner)findViewById(R.id.GPRS);
            ArrayAdapter<?> spinner_array = new ArrayAdapter<Object>(this,android.R.layout.simple_dropdown_item_1line,name_of_GPRS__available);
    spinner_array.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.getApplicationContext());     
    Editor prefsEditor = prefs.edit();     
    prefsEditor.putString("Object", name_of_GPRS__available.toString());  
    prefsEditor.commit(); 
    GPRS.setAdapter(spinner_array);
    //GPRS.setOnItemSelectedListener(MyOnItemSelectedListener());
    GPRS.setOnItemSelectedListener(new MyOnItemSelectedListener());`

    GPRS.setAdapter(spinner_array);
    //GPRS.setOnItemSelectedListener(MyOnItemSelectedListener());
    GPRS.setOnItemSelectedListener(new MyOnItemSelectedListener());

 public void onItemSelected(AdapterView<?> parent, View view, 
          final int position, long id) {
        // An item was selected. You can retrieve the selected item using
        // parent.getItemAtPosition(position)
      SetDefaultAPN(apn_id[position]);

          Toast.makeText(parent.getContext(), "ETracking System Selects " +          
      parent.getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show();  
      }


        public void onNothingSelected(AdapterView<?> parent) {
        // Another interface callback
    }

      public boolean SetDefaultAPN(int id)
      {
          boolean res = false;
          ContentResolver resolver = Configuration.this.getContentResolver();
          ContentValues values = new ContentValues();

          values.put("apn_id", id); 
          try
          {
              resolver.update(Uri.parse("content://telephony/carriers/preferapn"), values, null, null);
              Cursor c = resolver.query(
                    Uri.parse("content://telephony/carriers/preferapn"), 
                      null, 
                      "_id="+id, 
                      null, 
                      null);
              if(c != null)
              {
                  res = true;
                  c.close();
              }
          }
          catch (SQLException e)
          {
              //Log.d("TAG", e.getMessage());
          }
           return res;

      }

    /*
       * Enumerate all APN data
       */
      private void EnumerateAPNs()
      {
          Cursor   c = this.getContentResolver().query(
                Uri.parse("content://telephony/carriers/current"), null, null, null, null);
          if (c != null) 
          {

              //String s = "All APNs:\n";
              //Log.d("TAG", s);
                try 
              {
                   printAllData(c); //Print the entire result set
              }
                catch(SQLException e)
                {
                    Toast.makeText(Configuration.this, "No Network Connection Available", Toast.LENGTH_LONG).show();
                }

              c.close();
          }

      }


      /*
       *  Print all data records associated with Cursor c.
       *  Return a string that contains all record data.
       *  For some weird reason, Android SDK Log class cannot print very long string message.
       *  Thus we have to log record-by-record.
       */
      private void printAllData(Cursor c)
      {
          //if(c == null) return null;


          if(c.moveToFirst())
          {
            name_of_GPRS__available = new String[c.getCount()];
            apn_id = new int [c.getCount()];
            int i= 0;

            do{

                    name_of_GPRS__available [i]= c.getString(c.getColumnIndex("name"));
                    apn_id[i]=c.getInt(c.getColumnIndex("_id"));
                    //Log.d("TAG",name[i]);
                    i++;

              }while(c.moveToNext());
              //Log.d("TAG","End Of Records");

            //name_of_GPRS_available [1]=" GPRS";

          }   
      }

请指导我。我该怎么做。我会非常感谢你

Answer 1

我认为这是针对Gingerbread设备的，因为设置默认APN已在ICS（4.0 - API 14）中删除，不推荐使用。

您是否尝试过添加：

wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE); 
wifiManager.setWifiEnabled(true);

您需要将这些权限添加到Android Manifest：

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.UPDATE_DEVICE_STATS"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>

您还可以使用其他Spinner来让用户通过使用扫描结果从可用的Wifi点中进行选择：http://developer.android.com/reference/android/net/wifi/ScanResult.html

然后

WifiManager：http://developer.android.com/reference/android/net/wifi/WifiManager.html

如果没有默认连接，则设置所需网络。

Markana有一个很好的教程，以这种方式使用Wifi：http://marakana.com/forums/android/examples/40.html

如何在GPRS微调器中添加Wi-Fi选项

1 个答案: