編輯:關於android開發
安卓開發中對於APN的網絡API沒有公開,不過我們可以閱讀源代碼,然後進行數據庫操作,系統會自動監聽數據庫的變化,從而實現開啟或者關閉APN。
大家可以研究一下frameworks/base/core/Java/android/provider/Telephony.java這個類,比較重要的就是 URI 和數據庫字段: content://telephony/carriers。字段可以在Telephony.java中找到。
1、當開啟APN的時候,設置一個正確的移動或者聯通的APN
2、關閉的時候設置一個錯誤APN就會自動關閉網絡
import java.util.ArrayList;
import java.util.List; import android.app.Activity; import android.content.ContentValues; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button;
/** * Activity
*/
public class Main extends Activity {
/** Called when the activity is first created. */
Uri uri = Uri.parse("content://telephony/carriers");
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button open= (Button) findViewById(R.id.open);
Button close= (Button) findViewById(R.id.close);
open.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
openAPN();
}
});
close.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
closeAPN();
}
});
}
public void openAPN(){
List list = getAPNList();
for (APN apn : list) {
ContentValues cv = new ContentValues();
cv.put("apn", APNMatchTools.matchAPN(apn.apn));
cv.put("type", APNMatchTools.matchAPN(apn.type));
getContentResolver().update(uri, cv, "_id=?", new String[]{apn.id});
}
}
public void closeAPN(){
List list = getAPNList();
for (APN apn : list) {
ContentValues cv = new ContentValues();
cv.put("apn", APNMatchTools.matchAPN(apn.apn)+"mdev");
cv.put("type", APNMatchTools.matchAPN(apn.type)+"mdev");
getContentResolver().update(uri, cv, "_id=?", new String[]{apn.id});
}
}
private List getAPNList(){
String tag = "Main.getAPNList()";
//current不為空表示可以使用的APN
String projection[] = {"_id,apn,type,current"};
Cursor cr = this.getContentResolver().query(uri, projection, null, null, null);
List list = new ArrayList();
while(cr!=null && cr.moveToNext()){
Log.d(tag, cr.getString(cr.getColumnIndex("_id")) + " " + cr.getString(cr.getColumnIndex("apn")) + " " + cr.getString(cr.getColumnIndex("type"))+ " " + cr.getString(cr.getColumnIndex("current")));
APN a = new APN();
a.id = cr.getString(cr.getColumnIndex("_id"));
a.apn = cr.getString(cr.getColumnIndex("apn"));
a.type = cr.getString(cr.getColumnIndex("type"));
list.add(a);
}
if(cr!=null)
cr.close();
return list;
}
public static class APN{
String id;
String apn;
String type;
}
}
/**
*----分頁
*/
public final class APNMatchTools {
public static class APNNet{
/* * 中國移動cmwap
*/
public static String CMWAP = "cmwap";
/** * 中國移動cmnet
*/
public static String CMNET = "cmnet";
//中國聯通3GWAP設置 中國聯通3G因特網設置 中國聯通WAP設置 中國聯通因特網設置
//3gwap 3gnet uniwap uninet
/** * 3G wap 中國聯通3gwap APN
*/
public static String GWAP_3 = "3gwap";
/** * 3G net 中國聯通3gnet APN
*/
public static String GNET_3="3gnet";
/** * uni wap 中國聯通uni wap APN
*/
public static String UNIWAP="uniwap";
/** * uni net 中國聯通uni net APN
*/
public static String UNINET="uninet";
}
public static String matchAPN(String currentName) {
if("".equals(currentName) || null==currentName){
return "";
}
currentName = currentName.toLowerCase();
if(currentName.startsWith(APNNet.CMNET))
return APNNet.CMNET;
else if(currentName.startsWith(APNNet.CMWAP))
return APNNet.CMWAP;
else if(currentName.startsWith(APNNet.GNET_3))
return APNNet.GNET_3;
else if(currentName.startsWith(APNNet.GWAP_3))
return APNNet.GWAP_3;
else if(currentName.startsWith(APNNet.UNINET))
return APNNet.UNINET;
else if(currentName.startsWith(APNNet.UNIWAP))
return APNNet.UNIWAP;
else if(currentName.startsWith("default"))
return "default";
else return "";
// return currentName.substring(0, currentName.length() - SUFFIX.length());
}
}
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