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public class MainActivity extends AppCompatActivity
{
private ListView listView;
private final List<String> data = new Vector();
private ArrayAdapter<String> dataArrayAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.listView = findViewById(R.id.listView);
this.dataArrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, data);
listView.setAdapter(dataArrayAdapter);
}
@Override
protected void onResume()
{
super.onResume();
search("Paris", "Ile-de-France", "France");
}
public void search(String city, String state, String country) {
RequestQueue requestQueue = Volley.newRequestQueue(this);
String URL = "https://api.airvisual.com/v2/city?city=" + city + "&state=" + state + "&country=" + country + "&key=83ecc71f-0909-4128-bef4-8be290278d12";
final StringRequest request = new StringRequest(
Request.Method.GET,
URL,
this::handleResponse,
this::handleError);
requestQueue.add(request);
}
public void handleResponse(final String response)
{
final String[] testArray = new Gson().fromJson(response, String[].class);
final String serie = new Gson().toJson(testArray);
this.data.clear();
this.data.addAll(Arrays.asList(testArray));
dataArrayAdapter.notifyDataSetChanged();
}
public void handleError(VolleyError volleyError)
{
Toast.makeText(getApplicationContext(),volleyError.getMessage(),Toast.LENGTH_SHORT).show();
}
} |
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