作爲工具類，可以直接調用。
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
public class CheckNetStatues
{
/*
* 判斷網絡連接是否已開
*true 已打開 false 未打開
* */
public static boolean isConn(Context context){
boolean bisConnFlag=false;
ConnectivityManager conManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo network = conManager.getActiveNetworkInfo();
if(network!=null){
bisConnFlag=conManager.getActiveNetworkInfo().isAvailable();
}
return bisConnFlag;
}
/*
* 打開設置網絡界面
* */
public static void setNetworkMethod(final Context context){
//提示對話框
AlertDialog.Builder builder=new Builder(context);
builder.setTitle("網絡設置提示").setMessage("網絡連接不可用,是否進行設置?").setPositiveButton("設置", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent=null;
//判斷手機系統的版本 即API大於10 就是3.0或以上版本
if(android.os.Build.VERSION.SDK_INT>10){
intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
}else{
intent = new Intent();
ComponentName component = new ComponentName("com.android.settings","com.android.settings.WirelessSettings");
intent.setComponent(component);
intent.setAction("android.intent.action.VIEW");
}
context.startActivity(intent);
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).show();
}
}
注意需要加權限： <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />