how to use String variable in SHOW method

i just started learning android and i'm stuck at this if anyone could help me

this is a part of the code :

public class MainActivity extends Activity {
ListView listView;
SQLiteActivity db;
String [] x;

public void SHOW() {

    db.Read();
    String [] x = db.getAll();
    db.close();

}
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.content_main);

    listView = (ListView) findViewById(R.id.list);

    db = new SQLiteActivity(this);
    db.Write();
    db.deleteAll();
    db.insert("title1", "story1");
    db.insert("title2","story2");
    db.insert("title3", "story3");
    db.close();

    SHOW();

    String[] adapter = new String[] { "a", "b", "c",};

    ArrayAdapter<String> i = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, adapter);

    listView.setAdapter(i);

so the task is to define the x in method SHOW. and put the x in the ArrayAdapter