Child Item

v2 API

Hi Dropbox Team,

I am trying, using Dropbox API, to access my files in Dropbox.
I have already done it with Dropbox API v1 and now I would like to do it with v2.
For this reason, I performed as following:-

1) As suggested, I downloaded the new DropBox-SDK from here:-
https://github.com/dropbox/dropbox-sdk-java

2) I run the file:
..\DropboxApiV2\dropbox-sdk-java-master\gradlew.bat

3) I executed "Import Project" in the Android Studio, and selected the folder:
..\dropbox-sdk-java-master\examples\android

4) I added the following line in the build.gradle file in "dependencies" section:-
compile 'com.dropbox.core:dropbox-core-sdk:3.0.6'

5) But I have the following error:-
Unable to load class 'org.grangle.loading.StyledTextOutput'

Alsothe following lines are marked in red:-
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
compile 'com.android.support:recyclerview-v7:23.1.1'

6) I have not yet updated "YOUR_APP_KEY_HERE" in AndroidManifest.xml with my app_key. For obtaining the app_key, in Dropbox Console, when I create the app_key
which name I have to give? Maybe "UserActivity"?

I need your help!
Thank you very much, in advance.
Andre

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Comments

Greg-DB

If you're just trying to run the Android example app as is, you don't need to run gradlew.bat. You can just switch the Dropbox dependency to "compile 'com.dropbox.core:dropbox-core-sdk:3.0.6'" as you mentioned. (You should use that instead of the existing "compile group: 'com.dropbox.core', name: 'dropbox-core-sdk', version: '0-SNAPSHOT', changing: true".)

Anyway, I don't see a reference to "org.grangle.loading.StyledTextOutput" in the Android example app. Is that the exact output you're getting?

The com.android.support dependencies are referencing the Android support library. That should already be available, but refer to the Android documentation there if not.

Finally, when registering your API app on the Dropbox App Console, you should supply the name of your app that should be presented to your users, e.g., what they would see on the Google Play Store (not "UserActivity").

Andre_LB

Hi Greg,
thanks for your very prompt reply.

Yes, when in Android Studio I execute "Sync Project with Gradle Files", I have this "Gradle Sync Issue":-
Unable to load class 'org.grangle.loading.StyledTextOutput'
Possible causes for this unexpected error include:
* Gradle's dependency cache may be corrupt (this sometimes occur after a network connection timeout)
* The state of a Gradle build process (daemon) may be corrupt.
Stopping all Gradle daemons may solve this problem.
* Your project may be using a third-part plugin which is not compatible

with the other plugins in the project or the version of Gradle requested by the project.

But for being honest, this is not the only issue.
I mean, in the old Dropbox example (DBRoulette) it was clear its pourpose.
There was a download example and an upload one.
Also, working these two examples, it has been easy to use them.

Now, it is not clear for me what I have to use for authentication, for downloading and for uploading.
It is not clear for me, which example I have to run.
Now it is not working, but when it works, it is not clear which code I will have to use.

Maybe I lost some important information.
Is there documentation explaining this?

Thanks, again!
Andre

Greg-DB

Thanks for the additional information. Unfortunately since that error isn't referencing Dropbox, I'm afraid I can't be of much help with that specifically. I recommend working through the list of potential causes it cites.

Anyway, thanks for the feedback. I understand how the Android example could certainly use more detailed documentation. For reference, to set up an app to use the SDK like the sample app does:

- Your AndroidManifest.xml should be set up as shown here.

- You start the flow by calling startOAuth2Authentication as shown here.

- You complete the flow by calling getOAuth2Token as shown here.

- Your app can store and re-use the resulting access token for that user, as the example does here.

- Once you have an access token, you can make a client as shown here.

- With a client, you can make whatever calls you want. The different pieces of functionality in the Android sample are broken out in different files listed here.

Andre_LB

Hi Greg,
thanks again for your prompt reply.

I tried to remove the Sync error but I have not been able.
You are saying that this error is not referencing Dropbox (and for this reason it is difficult for you to help me).
But my feeling is that this error is releted the downloaded codes and settings.
For this reason I am not able to fix it.
So I abandoned this way.

---------------------------------------
Now I am straight using my app.
1) I updated my AndroidManifest.xml as you suggested.
Please, note that I do not have the "OpenWithActivity" activity section in it.

2) I call the authentication.
For this reason, in a class (className) I added (conditioned to a botton) the following call:-
Auth.startOAuth2Authentication(className.this, ACCESS_KEY_NAME);

ACCESS_KEY_NAME is, of course, my personal key.

3) For completing the flow, as you suggested, I added the onResume method for calling getOAuth2Token.
Please, note that I took the onResume method from DropboxActivity class
(not from UserActivity one).

4) Since I have got an error for "initAndLoadData" missing, I commented these two calls.

I run this app and the result is:-
Unfortunately, className has stopped

Well, I really hope that you could help me.
I do not hide you that I am losing any hope.
Thank you very much, in advance,
Andre

chirstius

Hello @Andre_LB,

I think it would be very helpful for you to post some actual code samples of your Activities/Classes at this point rather than just describing the process.

This would help replicate the issue or at least make it easier to potentially identify issues with the authorization flow.

Would you be able to provide your manifest.xml and any relevant classes - properly sanitized of keys/tokens/etc. - for review?

Thanks,

-Chuck

Andre_LB

Hi Chuck,
thank you very much for your reply and suggestion.

In the mean time, there have been a few progresses. With the attached code, I am able to start and complete the flow. Also, to store and re-use the resulting access token.
It seems to me have obtained an access token but I am not able to make a client.

Indeed, when I add the "requestConfig" setting I have the following error:-
error: cannot access OkHttpClient
class file for okhttp3.OkHttpClient not found

I hope that this time to be easer for you to help me.
But I have another issue.
When I'll have made a client, it is still not clear how may I use it.
I mean, I would like to download/upload a file from/to a Dropbox folder of mine.
Well, how can I perform it?

Thank you very much, in advance.
Kind Regards,
Andre

public class PrvDef extends AppCompatActivity {

private static DbxClientV2 sDbxClient;
public Button auth_but;

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

auth_but = (Button) findViewById(R.id.login_button);
auth_but.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
                Auth.startOAuth2Authentication(PrvDef.this, getString(R.string.app_key));
            }
        });
    }


@Override
    protected void onResume() {
super.onResume();

if (hasToken()) {
            findViewById(R.id.login_button).setVisibility(View.GONE);
            findViewById(R.id.email_text).setVisibility(View.VISIBLE);
            findViewById(R.id.name_text).setVisibility(View.VISIBLE);
            findViewById(R.id.type_text).setVisibility(View.VISIBLE);
            findViewById(R.id.files_button).setEnabled(true);
            findViewById(R.id.open_with).setEnabled(true);
        } else {
            findViewById(R.id.login_button).setVisibility(View.VISIBLE);
            findViewById(R.id.email_text).setVisibility(View.GONE);
            findViewById(R.id.name_text).setVisibility(View.GONE);
            findViewById(R.id.type_text).setVisibility(View.GONE);
            findViewById(R.id.files_button).setEnabled(false);
            findViewById(R.id.open_with).setEnabled(false);
        }
    }
protected boolean hasToken() {
        SharedPreferences prefs = getSharedPreferences("dropbox-sample", MODE_PRIVATE);
        String accessToken = prefs.getString("access-token", null);
if (accessToken == null) {
            accessToken = Auth.getOAuth2Token();
if (accessToken != null) {
                prefs.edit().putString("access-token", accessToken).apply();
            }
        }
//--  requestConfig setting --------------------------------------------------------
        DbxRequestConfig requestConfig = DbxRequestConfig.newBuilder("examples-v2-demo")
                .withHttpRequestor(new OkHttp3Requestor(OkHttp3Requestor.defaultOkHttpClient()))
                .build();
sDbxClient = new DbxClientV2(requestConfig, accessToken);
return accessToken != null;
    }

}

========================= Manifest =====================================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.rram.prvdef">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".PrvDef">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name="com.dropbox.core.android.AuthActivity"
            android:configChanges="orientation|keyboard"
            android:launchMode="singleTask">
            <intent-filter>

<!-- Change this to be db- followed by your app key -->
                <data android:scheme="db-..my app key ..." />

                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.BROWSABLE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

    </application>

</manifest>

chirstius

@Andre_LB,

The issue regarding OkHttpClient not being found seems like it is a development environment issue, and not directly related to the Dropbox API. Are you getting errors from gradle or maven? Have you tried updating your project, or forcing a clean build? OkHttp is a dependency of the Dropbox SDK and should be included in your build environment when you include the Dropbox SDK. If you have checked out the SDK to build it yourself the dependency is still there and you'd likely see build errors occuring if it were not imported properly. As a test, you could try including the dependency directly (http://square.github.io/okhttp/#download) to see if it gets you past this error. But I'm not sure there is much direct help I can offer you in resolving this issue specifically since it is technically not an API issue.

As for how to upload/download a file via the Java SDK on Android there are examples available within the github respository:
Upload: https://github.com/dropbox/dropbox-sdk-java/blob/947f3f5aa9d5903a222d4b9e4ce7ce2c4defc2a4/examples/android/src/main/java/com/dropbox/core/examples/android/UploadFileTask.java#L61

Download: https://github.com/dropbox/dropbox-sdk-java/blob/947f3f5aa9d5903a222d4b9e4ce7ce2c4defc2a4/examples/android/src/main/java/com/dropbox/core/examples/android/DownloadFileTask.java#L68

I hope that gets you a bit further along,

-Chuck

Andre_LB

Hi Chuck,

thank you for your prompt reply.

Lovely, I included the dependency directly, as you suggested, and the error that I had from gradle has disappeared!

Now, if I run the app, I have got:-

Unfortunately, PrvDef has stopped.

The issue seems to be in client creating command (that is, "sDbxClient = new DbxClientV2(requestConfig, accessToken);" ).
Indeed, if I comment it this issue disappears.

I did not change the code (that i previously sent to you).

Let me know, please, if you need more information.

Thank you very much, in advance.

Kind Regards,

Andre

chirstius

@Andre_LB,

Again this appears to be a more generic Android development question and not a Dropbox API specific question.

I would suggest you take a good look at the sample Android application included in the Java SDK github repository:
https://github.com/dropbox/dropbox-sdk-java/tree/master/examples/android/src/main/java/com/dropbox/core/examples/android

Specifically, you are creating the client within your hasToken() method which seems a dubious place to perform such an action.

I suggest following the flow of the sample application carefully and paying attention to the following class:

https://github.com/dropbox/dropbox-sdk-java/blob/master/examples/android/src/main/java/com/dropbox/core/examples/android/DropboxClientFactory.java

And when/where it gets invoked:

https://github.com/dropbox/dropbox-sdk-java/search?utf8=%E2%9C%93&q=DropboxClientFactory&type=

Good luck,

-Chuck

Andre_LB

Hi Chuck,

thanks for your reply and for yuor advice.

I have set a project with the following classes:-
. PrvDef
. DropboxActivity
. DropboxClientFactory
. FileThumbnailRequestHandler
. GetCurrentAccountTask
. PicassoClient

DropboxActivity, DropboxClientFactory, FileThumbnailRequestHandler, GetCurrentAccountTask and PicassoClient
are exactly the same of "dropbox-sdk-java-master" project classes (apart from the package declaration, of course).

PrvDef class (attached) is slightly different from UserActivity: indeed I have commented the "filesButton" and "openWithButton" commands. Since I have a problem "before" them, I tried to simplify the project.

I run it, but the result is:-

Unfortunately, PrvDef Has stopped.

Now, if I comment the three rows in "initAndLoadData" method of DropboxActivity class, this issue disappear.

Also, both "view files" and "Test Open" buttons are enabled, that is the filing is that hasToken() method to be true.

Since my code is now so similar to "dropbox-sdk-java-master" code, it seems to me that it is no more possible for me to improve it.
Please, let me know your opinion. Thanks, in advance.

-------------------------------
Since I had a build.gradle file different from "dropbox-sdk-java-master" project one, I updated mine.
But I descovered that the build.gradle file of the "dropbox-sdk-java-master" project has Gradle errors.
I tried to remove those Gradle errors, but I have not been able to do it .

I mean, I have "Failed to resolve: com.dropbox.core:dropbox-core-sdk:0-SNAPSHOT" error.

Could you please confirm me that the build.gradle file of "dropbox-sdk-java-master" project not to have got Gradle Build errors and that project to be still running in Android correctly?

Also, I noticed that the dropbox-core-sdk library is not present in "dropbox-sdk-java-master". Where may I find the right version?

Thank you, in advance.

Kind Regards,

Andre

public class PrvDef extends DropboxActivity {

@Override
    protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_user);

        Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
        setSupportActionBar(toolbar);

        Button loginButton = (Button)findViewById(R.id.login_button);

        loginButton.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
                Auth.startOAuth2Authentication(PrvDef.this, getString(R.string.app_key));
            }
        });

        Button filesButton = (Button)findViewById(R.id.files_button);
        filesButton.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
//startActivity(FilesActivity.getIntent(PrvDef.this, ""));
            }
        });

        Button openWithButton = (Button)findViewById(R.id.open_with);
        openWithButton.setOnClickListener(new View.OnClickListener() {
@Override
            public void onClick(View v) {
//Intent openWithIntent = new Intent(UserActivity.this, OpenWithActivity.class);
                //startActivity(openWithIntent);
            }
        });
    }

@Override
    protected void onResume() {
super.onResume();

if (hasToken()) {
            findViewById(R.id.login_button).setVisibility(View.GONE);
            findViewById(R.id.email_text).setVisibility(View.VISIBLE);
            findViewById(R.id.name_text).setVisibility(View.VISIBLE);
            findViewById(R.id.type_text).setVisibility(View.VISIBLE);
            findViewById(R.id.files_button).setEnabled(true);
            findViewById(R.id.open_with).setEnabled(true);
        } else {
            findViewById(R.id.login_button).setVisibility(View.VISIBLE);
            findViewById(R.id.email_text).setVisibility(View.GONE);
            findViewById(R.id.name_text).setVisibility(View.GONE);
            findViewById(R.id.type_text).setVisibility(View.GONE);
            findViewById(R.id.files_button).setEnabled(false);
            findViewById(R.id.open_with).setEnabled(false);
        }
    }

@Override
    protected void loadData() {
new GetCurrentAccountTask(DropboxClientFactory.getClient(), new GetCurrentAccountTask.Callback() {
@Override
            public void onComplete(FullAccount result) {
                ((TextView) findViewById(R.id.email_text)).setText(result.getEmail());
                ((TextView) findViewById(R.id.name_text)).setText(result.getName().getDisplayName());
                ((TextView) findViewById(R.id.type_text)).setText(result.getAccountType().name());
            }

@Override
            public void onError(Exception e) {
                Log.e(getClass().getName(), "Failed to get account details.", e);
            }
        }).execute();
    }

}

chirstius

Hello @Andre_LB,

So after doing an examination of the Android example from the Java SDK repository, I can confirm that I am able to get it running. However, I did have to make a few edits to the build.gradle file, the proguard-rules, and Android Studio itself, when running on a fully updated version of Android Studio.

Can you post a copy of your build.gradle and also please include any app exceptions from logcat when you run the Dropbox code and the application closes?

Thanks!

-Chuck

Andre_LB

Hi Chuck,

attached my build.gradle.
Sorry, I have wrongly explaned myself: in this situation (after I have set the build.gradle as your example) I have a Gradle Sync Issue that I had got when I run your download, that is:-

Unable to load class 'org.gradle.logging.StyledTextOutput'.

I tried to remove this error, but I am not able.

You have said that "did have to make a few edits to the build.gradle file, the proguard-rules, and Android Studio itself".

I dowload again your example: the file dates seem changed, but the files seem to be the same.

That is, I have not seen any difference: what did you change?

Thanks, in advance.

Kind Regards,

Andre

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
        classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.5.2'
    }
}

allprojects {
    repositories {
        jcenter()
        mavenLocal()
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"

    defaultConfig {
        applicationId "com.rram.prvdef"
        minSdkVersion 19
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
    }

    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
        debug {
// to debug ProGuard rules
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules-debug.pro'
        }
    }

    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
    }

    lintOptions {
        disable 'InvalidPackage'
        abortOnError false
    }
}

dependencies {
    compile 'com.dropbox.core:dropbox-core-sdk:3.0.6'
    compile 'com.android.support:appcompat-v7:26.1.0'
    compile 'com.android.support:design:26.1.0'
    compile 'com.android.support:recyclerview-v7:26.1.0'
    // picasso 2.5.2 doesn't have OkHttp3 support (although it exists
    // on master). Must use OkHttp v2 and v3 until new picasso release
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.squareup.okhttp:okhttp:2.7.5'
    compile 'com.squareup.okhttp3:okhttp:3.5.0'
}

apply plugin: 'com.getkeepsafe.dexcount'

dexcount {
    format = "list"
    includeClasses = true
    includeFieldCount = false
    orderByMethodCount = true
}

chirstius

@Andre_LB,

I only changed the files and settings locally on my checked-out version of the example to get it running for me. I will be looking at getting changes made to the example but for now, I'd like to see if we can solve your issues via the same method.

So, for the first step, can you please try making the following edit to your gradle file, replace:

classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.5.2'

with

classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.8.2'

And let me know if that gets you past the StyledTextOutput error.

The next error you might encounter will require a change to proguard-rules-debug.pro. Make the following change:

-include "proguard-rules.pro"

-include proguard-rules.pro

(remove the quotes)

Another issue you might see is if instant app support is enabled in Android Studio. I disabled it due to classes not being properly found at runtime. To do this go to:

Files | Settings | Build, Execution, Deployment | Instant Run

And disable the setting.

Please give these changes a try and see if it makes a difference.

Thanks,

-Chuck

Andre_LB

Hi Chuch,

thank very much for your prompt reply and suggestions.

I applied all the suggested changes.

Also I updated the buildToolsVersion from "26.0.1" into "26.0.2": now I may Sync Project without errors.

But, if I run the app, I have got a few warnings and the following Gradle Build error:-

Execution failed for task 'app:transformClassesAndResoucesWithProguardForDebug'

Let me know, please. Thanks, in advance!

Kind Regards,

Andre

chirstius

@Andre_LB,

Can you please include details for the warnings and anything else logged about the error? Also, simple question, have you done a clean build? (Build | Clean Project)

Thanks,

-Chuck

Andre_LB

Hi Chuck,

thanks again for your reply and effort.

There are 57 warnings as, please, you can see: I am posting the first ten and the last seven.
Let me know, please, if you need the complete warning list.

Yes, I have. But clean build is the only command performed by me (apart from Sync Project and Run App).

Do you think me to have to execute something else?

Thanks, again.

Kind Regards,

Andre

=================================

Information:Gradle tasks [:app:assembleDebug]
Warning:com.dropbox.core.DbxStandardSessionStore: can't find referenced class javax.servlet.http.HttpSession
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.URLFetchServiceFactory
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPMethod
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.URLFetchService
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPMethod
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPRequest
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPHeader
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPRequest
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.FetchOptions$Builder
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.FetchOptions
Warning:com.dropbox.core.http.GoogleAppEngineRequestor: can't find referenced class com.google.appengine.api.urlfetch.HTTPResponse
......................................................................................................................
Warning:com.dropbox.core.http.GoogleAppEngineRequestor$FetchServiceUploader: can't find referenced class com.google.appengine.api.urlfetch.URLFetchService
Warning:com.dropbox.core.http.GoogleAppEngineRequestor$FetchServiceUploader: can't find referenced class com.google.appengine.api.urlfetch.HTTPRequest
Warning:com.dropbox.core.http.GoogleAppEngineRequestor$FetchServiceUploader: can't find referenced class com.google.appengine.api.urlfetch.HTTPResponse
Warning:okio.DeflaterSink: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
Warning:okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
Warning:there were 77 unresolved references to classes or interfaces.
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.
Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForDebug'.
> Job failed, see logs for details
Information:BUILD FAILED in 15s
Information:1 error
Information:57 warnings
Information:See complete output in console

Andre_LB

Hi Chuck,

I have a doubt.

Till now, I have always sent you the "Module: app" build.gradle file.

Attached, please, you may fing the "Project: PrvDef" one.

Is this correct? Thanks, in advance.

Kind Regards,

Andre

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

chirstius

@Andre_LB,

Let's take a step back here. At this point, I think it's best to just get the Android example app from the Java SDK repository running. I want to make sure we're both on the same page there. PrvDef is your custom application, correct? For the moment, I think we should hold off on that.

Can you please verify that we're currently working with a cleanly checked out copy of the Android example app that has been imported into Android studio?

If not, let's start over with that and try to get it up and running.

Thanks,

-Chuck

Andre_LB

Hi Chuck,

I downloaded the DropBox-SDK, executed "Import Project" in Android Studio and selected the folder:
..\examples\android

Since I have got the following error:-

Error:Failed to resolve: com.dropbox.core:dropbox-core-sdk:0-SNAPSHOT

I changed in the build.gradle file (Module: Android):-

compile group: 'com.dropbox.core', name: 'dropbox-core-sdk', version: '0-SNAPSHOT', changing: true

into:-

compile 'com.dropbox.core:dropbox-core-sdk:3.0.6'

Then, in my developer app console, I created the app "UserActivity" and updated the app key in AndroidManifest file and res/strings file.

Very well: now I am able to Authenticate and download a file.

Tomorrow I am going to check the differences between your example and my app (I confirm PrvDef is my custom application).

Thank you very much for your kind help and effort.

Kind Regards,

Andre

chirstius

@Andre_LB,

Thanks for the update and I'm glad the steps presented here before have allowed you to get the example app working. I think you're taking the right next steps by comparing between the two (example, and your app) and finding what differences might be causing the issue.

We'll still be here if you need help with anything Dropbox specific, but it sounds like you're on a good path to getting things resolved.

Thanks!

-Chuck

Andre_LB

Hi Chuck,

thank you very much for your support: now my app is able to download and upload a file in my DropBox repository.

For being honest, I am not sure why before it did not work.

I tried to understand, but I would not be able, at the moment, to say why.

It is not important for me, but if it is for you, please, let me know and I could try to investigate.

At the moment, I am working in understanding how obtain FileMetadata information of a file.

Indeed I obtained the file revision of the downloaded one, by your example.

In other words, if I had not had from your example this information I would not be able to obtain it.

I tried to see in DropBox documentation, but I was not able to see anything.

mDbxClient.files().download(metadata.getPathLower(), metadata.getRev())
        .download(outputStream);

That is, the .files().download() method needs the file path and revision. In the code it is obtained by metadata.

So, the kind question is: let us suppose to know the DropBox folder and file name.

How may I obtain its own FileMetadata metadata information?

Thank you very much, again.

Kind Regards,

Andrea

Greg-DB

If you know the path to the file, you can get the file metadata using `files().getMetadata()`:

https://dropbox.github.io/dropbox-sdk-java/api-docs/v3.0.x/com/dropbox/core/v2/files/DbxUserFilesRequests.html#getMetadata-java.lang.String-

By the way, if you just want to download the latest version of the file, you don't need to supply the 'rev' too. There's a version of the `files().download()` method that requires just the 'path' and not the 'rev':

https://dropbox.github.io/dropbox-sdk-java/api-docs/v3.0.x/com/dropbox/core/v2/files/DbxUserFilesRequests.html#download-java.lang.String-

Andre_LB

Hi Greg,

yes, I have just tied and it works.

@ Greg, Chuck: thank you very much for your help.

Now I may do, with API v2, what I need.

Kind Regards,

Andrea