Android中判断网络是否连接并提示设置

/** * 判断网络是否连通 * @param context * @return */public static boolean isNetworkConnected(Context context){ConnectivityManager cm = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);NetworkInfo info = cm.getActiveNetworkInfo();return info != null && info.isConnected();}

弹出对话框并设置

//如果网络连接if(Util.isNetworkConnected(context)){mMainFrameTask = new MainFrameTask();mMainFrameTask.execute();}else{AlertDialog.Builder builder = new Builder(context);builder.setTitle("设置网络");builder.setMessage("网络错误，请设置网络");builder.setPositiveButton("设置网络",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//获取系统版本号/* Build.VERSION_CODES    1 (0x00000001)           Android 1.0             BASE    2 (0x00000002)           Android 1.1             BASE_1_1    3 (0x00000003)           Android 1.5             CUPCAKE    4 (0x00000004)           Android 1.6             DONUT    5 (0x00000005)           Android 2.0             ECLAIR    6 (0x00000006)           Android 2.0.1          ECLAIR_0_1    7 (0x00000007)           Android 2.1             ECLAIR_MR1    8 (0x00000008)           Android 2.2             FROYO    9 (0x00000009)           Android 2.3             GINGERBREAD    10 (0x0000000a)         Android 2.3.3          GINGERBREAD_MR1    11 (0x0000000b)         Android 3.0             HONEYCOMB    12 (0x0000000c)         Android 3.1             HONEYCOMB_MR1    13 (0x0000000d)         Android 3.2             HONEYCOMB_MR2 */int currentapiVersion=android.os.Build.VERSION.SDK_INT;System.out.println("currentapiVersion = " + currentapiVersion);Intent intent;if(currentapiVersion < 11){intent = new Intent();intent.setClassName("com.android.settings", "com.android.settings.WirelessSettings");}else{//3.0以后//intent = new Intent( android.provider.Settings.ACTION_WIRELESS_SETTINGS);intent = new Intent( android.provider.Settings.ACTION_SETTINGS);}context.startActivity(intent);}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {}});builder.create().show();}}

注意：3.0以前和3.0以后的设置网络方法不同。

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