(Android™) OneDrive -- List Large Directory

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Demonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children.

Note: This example requires Chilkat v9.5.0.97 or greater.

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// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example uses the OAuth client credentials flow.
    // See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

    // Use your client ID, client secret, and tenant ID in the following lines
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("client_id","2871da2c-8176-4b7f-869b-2311aa82e743");
    json.UpdateString("client_secret","2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH");
    json.UpdateString("scope","https://graph.microsoft.com/.default");
    json.UpdateString("token_endpoint","https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token");

    CkHttp http = new CkHttp();
    http.put_AuthToken(json.emit());

    // This example will get the DriveItems in /lots-of-files, which has 450 children..
    http.SetUrlVar("item_path","/lots-of-files");
    http.SetUrlVar("user_id","4fe732c3-322e-4a6b-b729-2fd1eb5c6104");

    String resp;
    int i;
    int numItems;

    json.put_EmitCompact(false);

    // This loop will download DriveItems in sets of 25 until no more exist.
    boolean bGetMore = true;
    // (Add the $top query parameter to define the page size, i.e. the max number of results to return).
    String nextLink = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25";

    while ((bGetMore == true)) {

        // Get the next chunk of DriveItems
        resp = http.quickGetStr(nextLink);
        if (http.get_LastMethodSuccess() != true) {
            Log.i(TAG, http.lastErrorText());
            return;
            }

        // The response should be JSON.
        json.Load(resp);

        // A successful response should return a status code of 200.
        if (http.get_LastStatus() != 200) {
            Log.i(TAG, json.emit());
            Log.i(TAG, "Response status = " + String.valueOf(http.get_LastStatus()));
            return;
            }

        // Iterate over the DriveItems in the JSON response:
        i = 0;
        numItems = json.SizeOfArray("value");
        while (i < numItems) {
            json.put_I(i);
            Log.i(TAG, "name: " + json.stringOf("value[i].name"));
            i = i + 1;
            }

        // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems.
        // Otherwise, exit the loop.
        if (json.HasMember("\"@odata.nextLink\"") == true) {
            nextLink = json.stringOf("\"@odata.nextLink\"");
            Log.i(TAG, "nextLink: " + nextLink);
            }
        else {
            bGetMore = false;
            }

        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}