网络状态的判断

来源：互联网发布：java数组转成json 编辑：程序博客网时间：2024/05/16 12:15

1.判断当前的手机有没有连接互联网

//1.得到系统服务

ConnectivityManager manager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);

//2.得到网络信息对象

NetworkInfo networkInfo=manager.getActiveNetworkInfo()

//3.进行判断

if(networkInfo!=null && networkInfo.isConnected()){

Log.d("zzz","已连接互联网");

}else{

Log.d("zzz","未连接互联网");

}

注意：此段代码需要添加权限 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

2.在连接互联网的情况下，判断网络类型

//1.得到网络类型

int type=netWorkInfo.getType()

switch(type){

case ConnectivityManager.TYPE_WIFI:

Log.d("zzz","wifi");---wifi数据

break;

case ConnnectivityManager.TYPE_MOBILE:

Log.d("zzz","mobile");--移动数据

break;

}

3.在连接互联网的情况下，如果是移动数据的话，判断具体是什么类型的 2G/3G/4G

//得到详细的网络类型 wap 2G/3G/4G网络

public void getDetailMobileNetType(NetworkInfo netInfo){

String strNetworkType="";

//得到整数类型

int subtype = netInfo.getSubtype();

//得到名子

String _strSubTypeName=netInfo.getSubtypeName();

switch(subtype){

case TelephonyManager.NETWORK_TYPE_GPRS://联通2G

case TelephonyManager.NETWORK_TYPE_EDGE://移动2G

case TelephonyManager.NETWORK_TYPE_CDMA://电信2G

case TelephonyManager.NETWORK_TYPE_1xRTT:

case TelephonyManager.NETWORK_TYPE_IDEN: //api<8 : replace by 11

strNetworkType = "2G";

break;

case TelephonyManager.NETWORK_TYPE_UMTS:

case TelephonyManager.NETWORK_TYPE_EVDO_0:

case TelephonyManager.NETWORK_TYPE_EVDO_A:

case TelephonyManager.NETWORK_TYPE_HSDPA:

case TelephonyManager.NETWORK_TYPE_HSUPA:

case TelephonyManager.NETWORK_TYPE_HSPA:

case TelephonyManager.NETWORK_TYPE_EVDO_B: //api<9 : replace by 14

case TelephonyManager.NETWORK_TYPE_EHRPD: //api<11 : replace by 12

case TelephonyManager.NETWORK_TYPE_HSPAP: //api<13 : replace by 15

strNetworkType = "3G";

break;

case TelephonyManager.NETWORK_TYPE_LTE: //api<11 : replace by 13

strNetworkType = "4G";

break;

default:

// http://baike.baidu.com/item/TD-SCDMA 中国移动联通电信三种3G制式

if (_strSubTypeName.equalsIgnoreCase("TD-SCDMA") || _strSubTypeName.equalsIgnoreCase("WCDMA") || _strSubTypeName.equalsIgnoreCase("CDMA2000"))

{

strNetworkType = "3G";

}

else

{

strNetworkType = _strSubTypeName;

}

break;

}

Log.d("zzz", "网络类型是："+strNetworkType);

}

4.如果手机没有连接互联网，则跳转到设置页面进行网络设置

//弹出对话框

AlertDialog.Builder builder=new Builder(this);

builder.setTitle("网络设置提示");

builder.setMessage("网络连接不可用，是否进行设置？");

builder.setPositiveButton("设置", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

//跳转到系统“设置" 网络的界面

Intent intent=new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);

startActivity(intent);

}

});

builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

//关闭对话框

dialog.dismiss();

}

});

AlertDialog dialog = builder.create();

dialog.show();

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