在Android中使用Volley库发布包含JsonArray的请求对象可以通过以下步骤实现:
dependencies {
implementation 'com.android.volley:volley:1.2.1'
}
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.toolbox.HttpHeaderParser;
import com.android.volley.toolbox.JsonArrayRequest;
import org.json.JSONArray;
import org.json.JSONException;
import java.io.UnsupportedEncodingException;
public class CustomJsonArrayRequest extends Request<JSONArray> {
private Response.Listener<JSONArray> listener;
public CustomJsonArrayRequest(int method, String url, Response.Listener<JSONArray> listener,
Response.ErrorListener errorListener) {
super(method, url, errorListener);
this.listener = listener;
}
@Override
protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers, "utf-8"));
return Response.success(new JSONArray(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException | JSONException e) {
return Response.error(new ParseError(e));
}
}
@Override
protected void deliverResponse(JSONArray response) {
listener.onResponse(response);
}
}
import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private static final String URL = "http://example.com/api/data";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RequestQueue requestQueue = Volley.newRequestQueue(this);
CustomJsonArrayRequest jsonArrayRequest = new CustomJsonArrayRequest(
Request.Method.GET, URL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
// 处理返回的JsonArray数据
try {
for (int i = 0; i < response.length(); i++) {
JSONObject jsonObject = response.getJSONObject(i);
// 解析JsonArray中的每个对象
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
// 其他处理逻辑...
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Error: " + error.getMessage());
}
});
requestQueue.add(jsonArrayRequest);
}
}
以上代码演示了如何使用Volley库在Android中发送包含JsonArray的请求对象,并在请求的回调中处理返回的JsonArray数据。你可以根据自己的实际需求进行修改和扩展。
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