Android检查当前网络状态是否可用并

当我们进入App的时候，首先会判断当前的网络状态是否可用，如果不可用就弹出一个Dialog让用户进行网络的设置，点击设置的时候跳转到系统的网络设置界面。

运行效果:



网络状态的检查（WangKeUtils.java）：

/**
* 检查网络是否可用
* @param context
* @return true,false
*/
public static boolean isNetWorkAvailable(Context context){

ConnectivityManager connectManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo info = connectManager.getActiveNetworkInfo();

return (info!=null && info.isAvailable());

}

需要注意的是，在检查当前设备的网络状态是否可用的时候需要加上权限:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

设置界面的跳转:

Intent intent = new Intent("android.settings.WIRELESS_SETTINGS");
startActivity(intent);

完整代码:

public class T44Fragment extends Fragment {

private AlertDialog alertDialog;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fragment_t44, container, false);

if(!WangkeUtils.isNetWorkAvailable(getActivity())){

showSetNetWorkDialog(getActivity());

}

return view;
}

private void showSetNetWorkDialog(Context context) {

AlertDialog.Builder builder = new AlertDialog.Builder(context);

builder.setTitle("网络信息提示");

builder.setMessage("当前网络不可用,请先进行设置");

builder.setPositiveButton("设置", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {

Intent intent = new Intent("android.settings.WIRELESS_SETTINGS");
startActivity(intent);

}
});

builder.setNegativeButton("退出", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {

alertDialog.dismiss();

}
});

alertDialog = builder.create();

alertDialog.show();

}

}