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A Java library for the Dropbox Core API.
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dropbox/dropbox-sdk-java
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Important: Make sure you're using v7.0.0 or newer of this SDK by January 2026 for continued compatibility with the Dropbox API servers. Please refer to this blog post for more information:https://dropbox.tech/developers/api-server-certificate-changes
A Java library to accessDropbox's HTTP-based Core API v2. This SDK also supports the olderCore API v1, but that support will be removed at some point.
License:MIT
Documentation:Javadocs
The current release of Dropbox SDK Java supports Java 8+.
The current release of Dropbox SDK Java supports Android 8+ (SDK 26+)
If you're using Maven, then edit your project's "pom.xml" and add this to the<dependencies> section:
<dependency> <groupId>com.dropbox.core</groupId> <artifactId>dropbox-core-sdk</artifactId> <version>7.0.0</version></dependency>
If you are using Gradle, then edit your project's "build.gradle" and add this to thedependencies section:
dependencies {// ... implementation'com.dropbox.core:dropbox-core-sdk:7.0.0'}You can also download the Java SDK JAR and and its required dependencies directly from thelatest release page. Note that the distribution artifacts on the releases pages do not contain optional dependencies.
A good way to start using the Java SDK is to follow this quick tutorial. Just make sure you have the Java SDKinstalled first!
To use the Dropbox API, you'll need to register a new app in theApp Console. Select Dropbox API app and choose your app's permission. You'll need to use the app key created with this app to access API v2.
In order to make calls to the API, you'll need an instance of the Dropbox object. To instantiate, pass in the access token for the account you want to link. (Tip: You cangenerate an access token for your own account through theApp Console).
importcom.dropbox.core.DbxException;importcom.dropbox.core.DbxRequestConfig;importcom.dropbox.core.v2.DbxClientV2;publicclassMain {privatestaticfinalStringACCESS_TOKEN ="<ACCESS TOKEN>";publicstaticvoidmain(Stringargs[])throwsDbxException {// Create Dropbox clientDbxRequestConfigconfig =DbxRequestConfig.newBuilder("dropbox/java-tutorial").build();DbxClientV2client =newDbxClientV2(config,ACCESS_TOKEN); }}
Test it out to make sure you've linked the right account:
// Get current account infoFullAccountaccount =client.users().getCurrentAccount();System.out.println(account.getName().getDisplayName());
You can use the Dropbox object you instantiated above to make API calls. Try out a request to list the contents of a folder.
// Get files and folder metadata from Dropbox root directoryListFolderResultresult =client.files().listFolder("");while (true) {for (Metadatametadata :result.getEntries()) {System.out.println(metadata.getPathLower()); }if (!result.getHasMore()) {break; }result =client.files().listFolderContinue(result.getCursor());}
Try uploading a file to your Dropbox.
// Upload "test.txt" to Dropboxtry (InputStreamin =newFileInputStream("test.txt")) {FileMetadatametadata =client.files().uploadBuilder("/test.txt") .uploadAndFinish(in);}
importcom.dropbox.core.DbxException;importcom.dropbox.core.DbxRequestConfig;importcom.dropbox.core.v2.DbxClientV2;importcom.dropbox.core.v2.files.FileMetadata;importcom.dropbox.core.v2.files.ListFolderResult;importcom.dropbox.core.v2.files.Metadata;importcom.dropbox.core.v2.users.FullAccount;importjava.io.FileInputStream;importjava.io.InputStream;importjava.io.IOException;publicclassMain {privatestaticfinalStringACCESS_TOKEN ="<ACCESS TOKEN>";publicstaticvoidmain(Stringargs[])throwsDbxException,IOException {// Create Dropbox clientDbxRequestConfigconfig =DbxRequestConfig.newBuilder("dropbox/java-tutorial").build();DbxClientV2client =newDbxClientV2(config,ACCESS_TOKEN);// Get current account infoFullAccountaccount =client.users().getCurrentAccount();System.out.println(account.getName().getDisplayName());// Get files and folder metadata from Dropbox root directoryListFolderResultresult =client.files().listFolder("");while (true) {for (Metadatametadata :result.getEntries()) {System.out.println(metadata.getPathLower()); }if (!result.getHasMore()) {break; }result =client.files().listFolderContinue(result.getCursor()); }// Upload "test.txt" to Dropboxtry (InputStreamin =newFileInputStream("test.txt")) {FileMetadatametadata =client.files().uploadBuilder("/test.txt") .uploadAndFinish(in); } }}
Some more complete examples can be found here:
- Example for a simple web app:Web File Browser example
- Example for an Android app written in Kotlin:Android Kotlin Example
To try out running these examples, please follow the instructions below.
Save your Dropbox API key to a JSON file called, say, "test.app":
{"key":"Your Dropbox API app key","secret":"Your Dropbox API app secret"}App key and secret can be found in you app page inApp Console.
git clone https://github.com/dropbox/dropbox-sdk-java.gitcd dropbox-sdk-java./update-submodules# also do this after every "git checkout"./gradlew build# requires `python` command to use Python 3.9, pip dropbox
The output will be in "build/".
- Follow the instructions in the "Build from source" section above.
- Save your Dropbox API key in a file called "test.app". See:Save your Dropbox API key, above.
- Compile and install the SDK into your local maven repo:
./gradlew build - To compile all the examples:
cd examples/ && ./gradlew classes - To compile just one example:
cd examples/ && ./gradlew :<example-name>:classes
This example runs through the OAuth 2 authorization flow.
cd examples./run authorize test.app test.authThis produces a file named "test.auth" that has the access token. This file can be passed in to the other examples.
A simple example that fetches and displays information about the account associated with the access token.
cd examples./run account-info test.auth(You must first generate "test.auth" using the "authorize" example above.)
An example of how to watch for changes in a Dropbox directory.
cd examples./run longpoll test.auth"/path/to/watch"
(You must first generate "test.auth" using the "authorize" example above.)
Uploads a file to Dropbox. The example includes regular and chunked file uploads.
cd examples./run upload-file test.auth local-path/file.txt /dropbox-path/file.txt(You must first generate "test.auth" using the "authorize" example above.)
A tiny web app that runs through the OAuth 2 authorization flow and then uses Dropbox API calls to let the user browse their Dropbox files.
Prerequisite: In the Dropbox APIapp configuration console, you need to add "http://localhost:5000/dropbox-auth-finish" to the list of allowed redirect URIs.
cd examples./run web-file-browser 5000 test.app web-file-browser.db- Run through the
authorizeexample above to get a "test.auth" file. ./gradlew -Pcom.dropbox.test.authInfoFile=<path-to-test.auth> integrationTest
To run individual tests, use the--tests gradle test filter:
./gradlew -Pcom.dropbox.test.authInfoFile=<path-to-test.auth> integrationTest --tests'*.DbxClientV1IT.testAccountInfo'
Edit your project's "build.gradle" and add the following to the dependencies section:
dependencies { // ... implementation 'com.dropbox.core:dropbox-core-sdk:7.0.0' implementation 'com.dropbox.core:dropbox-android-sdk:7.0.0'}If you leverage jettifier and see the following errors then please addandroid.jetifier.ignorelist = jackson-core,fastdoubleparser to yourgradle.properties file.
Failed to transform jackson-core-2.15.0.jar (com.fasterxml.jackson.core:jackson-core:2.15.0) to match attributes {artifactType=android-classes-jar, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-api}.The Android code in this SDK is written in Kotlin (as of 5.4.x) and Kotlin is now a runtime dependency. If you do not already have Kotlin in your project, you will need to addimplementation("org.jetbrains.kotlin:kotlin-stdlib:1.6.21") to your dependencies block in order to avoid a runtime exception.
If theofficial Dropbox App is installed, it will attempt to use it to do authorization. If it is not, a web authentication flow is launched in-browser.
Use the methods in theAuth to start an authentication sessions.
Please look at theexamples/android sample app for usage as well.
The following below is required configuration when using the SDK on Android.
Add these following pieces to yourAndroidManifest.xml to use Dropbox for Authentication in Android.
Use your Dropbox APP Key in place ofdropboxKey below. You need to add theAuthActivity entry, and it's associatedintent-filter.
<manifest> ... <application> <activity android:name="com.dropbox.core.android.AuthActivity" android:exported="true" android:configChanges="orientation|keyboard" android:launchMode="singleTask"> <intent-filter> <data android:scheme="db-${dropboxKey}" /> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.BROWSABLE" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> <!-- Additional intent-filter required as a workaround for Apps using targetSdk=33 until the fix in the Dropbox app is available to all users. --> <intent-filter> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> </application> ...</manifest>Your activity starting the authorization flow should also configured withandroid:launchMode="singleTask". Also, if that activity is configured withandroid:taskAffinity, then theAuthActivity should also configured with the same task affinity, such that authorization result can be passed back to your activity.
🚨There is a known issue regarding apps withtargetSdk=33 regarding app-to-app authentication when the Dropbox App is installed 🚨A fix is being worked on and will be released in an upcoming version of the Dropbox Mobile App.
Additionally, you need to allowqueries from the Dropbox official app for verification during the app-to-app authentication flow.
<manifest> ... <queries> <package android:name="com.dropbox.android" /> </queries> ...</manifest>When I useOkHttp3Requestor inDbxRequestConfig, I get errors like 'class file for okhttp3.OkHttpClient not found'
The dependency of OKHttp/OKHttp3 is optional. You should add them, only if you explicitly want to use it as the http requestor.
Example in Gradle:
dependencies {// ... api'com.squareup.okhttp3:okhttp:4.0.0'}
When I use the bundle JAR with some OSGi containers within an OSGi subsystem, I get a "Missing required capability" error
The JAR's manifest has the following line:
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=11))"Most OSGi containers should provide this capability. Unfortunately, some OSGi containers don't do this correctly and will reject the bundle JAR in the OSGi subsystem context.
As a workaround, you can build your own version of the JAR that omits the "osgi.ee" capability by running:
./gradlew clean./gradlew -Posgi.bnd.noee=true :core:jar
(This is equivalent to passing the "-noee" option to the OSGi "bnd" tool.)
Another workaround is to tell your OSGi container to provide that requirement:StackOverflow answer.
The only ProGuard rules necessary are for the SDK's required and optional dependencies. If you encounter ProGuard warnings, consider adding the following "-dontwarn" directives to your ProGuard configuration file:
-dontwarn okio.**-dontwarn okhttp3.**-dontwarn com.squareup.okhttp.**-dontwarn com.google.apphosting.**-dontwarn com.google.appengine.**-dontwarn com.google.protos.cloud.sql.**-dontwarn com.google.cloud.sql.**-dontwarn javax.activation.**-dontwarn javax.mail.**-dontwarn javax.servlet.**-dontwarn org.apache.**As of version 7.0.0, the SDK no longer provides certificate pinning by default. We provide hooks for you to run each of your requests withyour ownSSLSocketFactory orCertificatePinner. To provide this to your calls, you can use any of the requestors provided.
Note: If you were previously usingSSLConfig, this is no longer available. You can view the source ingit historybut we no longer provide any default certificate pinning or any other configuration.
StandardHttpRequestor.ConfigcustomConfig =StandardHttpRequestor.Config.DEFAULT_INSTANCE.copy() .withSslSocketFactory(mySslSocketFactory) .build();StandardHttpRequestorrequestor =newStandardHttpRequestor(customConfig);
okhttp3.OkHttpClienthttpClient =OkHttp3Requestor.defaultOkHttpClientBuilder() .certificatePinner(myCertificatePinner) .build();
OkHttpClienthttpClient =OkHttpRequestor.defaultOkHttpClient().clone() .setCertificatePinner(myCertificatePinner) .build();
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A Java library for the Dropbox Core API.
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