Android - Volley 설치와 기본 예제

 

2021.10.26 - Volley

 

 

Lib 추가

implementation 'com.android.volley:volley:1.1.1'

입력 후 'Sync Now' 클릭

 

Manifest 설정

<uses-permission android:name="android.permission.INTERNET"/>
...
android:usesCleartextTraffic="true"

 

추가한 코드

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Response.Listener<String> rplsn = new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                ((TextView)findViewById(R.id.textview)).setText(response.toString());
                if(false) try {
                    JSONObject jo = new JSONObject(response);
                    Toast.makeText(getApplicationContext(), "Dbg onResponse: " + jo.toString(), Toast.LENGTH_SHORT).show();
                } catch (JSONException e) {
                    Toast.makeText(getApplicationContext(), "Err onResponseJson: " + e.toString(), Toast.LENGTH_LONG).show();
                }
            }
        };
        Response.ErrorListener errlsn = new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(MainActivity.this, "Err ErrorListener: " + error.toString(), Toast.LENGTH_SHORT).show();
            }
        };

        String url = "http://google.com";
        StringRequest req = new StringRequest(Request.Method.GET, url, rplsn, errlsn);
        //req.setShouldCache(false);
        RequestQueue rq = Volley.newRequestQueue(MainActivity.this);
        //rq.getCache().clear();
        rq.add(req);
    }
}

 

실행 결과

 

다운로드

VolleyEx1.zip

0.28MB