ConnectivityManager判断是否有网络

来源：互联网发布：慕尼黑惨案知乎编辑：程序博客网时间：2024/04/30 08:14

/** 判断是否有网络 */private boolean checkNetwork() {boolean flag = false;ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);if (cwjManager.getActiveNetworkInfo() != null)flag = cwjManager.getActiveNetworkInfo().isAvailable();if (!flag) {Builder b = new AlertDialog.Builder(this).setTitle("没有可用的网络").setMessage("请开启GPRS或WIFI网络连接");b.setPositiveButton("确定", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {Intent mIntent = new Intent("/");ComponentName comp = new ComponentName("com.android.settings","com.android.settings.WirelessSettings");mIntent.setComponent(comp);mIntent.setAction("<span class=\"hilite\">android</span>.intent.action.VIEW");startActivity(mIntent);}}).setNeutralButton("取消", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {dialog.cancel();}}).create();b.show();}return flag;}

Android编程获取网络连接状态(3G/Wifi)及调用网络配置界面
http://www.cnblogs.com/mainroadlee/archive/2011/01/11/Android_Network_State_Checking_And_Setting.html

/** * 检测是否开启wify或gprs * @param context * @return */public boolean checkNetwork(final Context context){        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);        //mobile 3G Data Network        State mobile = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();        //wifi        State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();                //如果3G网络和wifi网络都未连接，且不是处于正在连接状态 则进入Network Setting界面 由用户配置网络连接        if(mobile==State.CONNECTED||mobile==State.CONNECTING)            return true;        if(wifi==State.CONNECTED||wifi==State.CONNECTING)        return true;                        Builder b = new android.app.AlertDialog.Builder(context).setTitle("没有可用的网络").setMessage("请开启GPRS或WIFI网络连接");b.setPositiveButton("设置网络", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {context.startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));//进入无线网络配置界面//context.startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS)); //进入手机中的wifi网络设置界面}}).setNeutralButton("取消", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {dialog.cancel();}}).create();b.show();return false;            }

App自动更新之通知栏下载
http://www.cnblogs.com/qianxudetianxia/archive/2011/04/12/2010919.html

0 0