android 检查可用网络
2010-10-13 01:56:00 来源:本站整理在手机应用与网络交互数据的时候,我们首先要判断有没有可用的网络,如果没有则跳到相应的网络设置页面,方法详见代码:
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("android.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;
}
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