网络请求之前进行网络判断WiFi是否连接

public boolean isWifiConnected(Context context) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifiNetworkInfo = connectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (wifiNetworkInfo.isConnected()) {
return true;
} else {
builder.setMessage("请检查WIFI是否连接成功！");
builder.setTitle("提示信息");
builder.setPositiveButton("设置",
new DialogInterface.OnClickListener() {
public void onClick(final DialogInterface dialog,
int which) {
Intent intent = new Intent(
Settings.ACTION_WIFI_SETTINGS);
startActivity(intent);
//点击设置1秒后消失
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
dialog.dismiss();
}
}, 1000);
}
});
builder.setNegativeButton("取消",
new android.content.DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
AlertDialog dialog = builder.create();
dialog.show();
return false;
}