更改设置Android后重新加载或重新创建旧活动

Question

I have an activity which displays data and before everything starts I do a check whether there is internet or not. If there isn't I send the user to the Wifi settings.

The problem I am facing is that after the user does connect to the internet and presses back, the app is empty without the data. Is there a way to reload this activity or recreate it?

I tried this code but it recreates the activity before I go to the settings so the dialogue box stays open

@Override
protected void onResume() {
super.onResume();
this.onCreate(null);
}

This is the code that checks the internet connection

    if(!isNetworkAvailable()){
         //Toast.makeText(getApplicationContext(), "internet is not avialable", Toast.LENGTH_LONG).show();

        AlertDialog.Builder ad = new AlertDialog.Builder(this);
        ad.setMessage("There is no Internet Connection.\n Please check your settings.");
        ad.setCancelable(false);
        ad.setPositiveButton("Internet Settings", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) 
            {
                startActivity(new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));

            }               

        });
        ad.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) 
            {
                finish();
            }
        });

        ad.show();
    }

Answer 1

Perhaps the simplest solution is to call the recreate() method of the Activity class. Something like the following: YourActivity.recreate() . Keep in mind that this only works for >= API 11.

You can also use an Intent to do a simple relaunch of your current Activity as follows:

Intent intent = getIntent();
finish();
startActivity(intent);

You can find more information here: How do I restart an Android Activity

Answer 2

在代码的onResume部分中，我添加了一个if statement ，用于再次检查互联网。