要在Android中登录并获取JSON数组,您可以使用以下步骤和示例代码:
implementation 'com.android.volley:volley:1.1.1'
import android.content.Context;
import android.widget.Toast;
import com.android.volley.Request;
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.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class YourClass {
private Context mContext;
private RequestQueue mRequestQueue;
public YourClass(Context context) {
mContext = context;
mRequestQueue = Volley.newRequestQueue(mContext);
}
public void loginAndGetJsonArray(String username, String password) {
String loginUrl = "your_login_url";
String jsonArrayUrl = "your_json_array_url";
// Create a login request
StringRequest loginRequest = new StringRequest(Request.Method.POST, loginUrl,
new Response.Listener() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
String token = jsonObject.getString("token");
// Create a request to get JSON array using the token
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, jsonArrayUrl, null,
new Response.Listener() {
@Override
public void onResponse(JSONArray response) {
// Handle the JSON array here
// Pass it to your adapter or process it further
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(mContext, "Error getting JSON array: " + error.getMessage(), Toast.LENGTH_SHORT).show();
}
}) {
@Override
public Map getHeaders() {
Map headers = new HashMap<>();
headers.put("Authorization", "Bearer " + token);
return headers;
}
};
// Add the request to the queue
mRequestQueue.add(jsonArrayRequest);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(mContext, "Login error: " + error.getMessage(), Toast.LENGTH_SHORT).show();
}
}) {
@Override
protected Map getParams() {
Map params = new HashMap<>();
params.put("username", username);
params.put("password", password);
return params;
}
};
// Add the login request to the queue
mRequestQueue.add(loginRequest);
}
}
YourClass yourClass = new YourClass(mContext);
yourClass.loginAndGetJsonArray("your_username", "your_password");
以上代码将发送一个登录请求,获取响应中的身份验证令牌,然后使用该令牌发送第二个请求来获取JSON数组。您可以根据您的实际需求自定义代码,并根据您的服务器端点调整URL。