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Stephen Wylie の Google Drive の例 (ここ) を実装しようとしています。これが私のコードです:

package com.googledrive.googledriveapp;
// For Google Drive / Play Services
// Version 1.1 - Added new comments & removed dead code
// Stephen Wylie - 10/20/2012
import java.io.IOException;
import java.util.ArrayList;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.google.android.gms.auth.GoogleAuthException;
import com.google.android.gms.auth.GoogleAuthUtil;
import com.google.android.gms.auth.UserRecoverableAuthException;
import com.google.android.gms.common.AccountPicker;
import com.google.api.client.auth.oauth2.BearerToken;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.android2.AndroidHttp;
import com.google.api.client.googleapis.extensions.android2.auth.GoogleAccountManager;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.json.JsonHttpRequest;
import com.google.api.client.http.json.JsonHttpRequestInitializer;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.Drive.Apps.List;
import com.google.api.services.drive.Drive.Files;
import com.google.api.services.drive.DriveRequest;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;

public class MainActivity extends Activity {
    private static final int CHOOSE_ACCOUNT=0;
    private static String accountName;
    private static int REQUEST_TOKEN=0;
    private Button btn_drive;
    private Context ctx = this;
    private Activity a = this;

    public void onCreate(Bundle savedInstanceState) {

        /*
         * Etc... (Other application logic belonging in onCreate)
         */
            btn_drive.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                chooseAccount();
            }
            });
    }

    public void chooseAccount() {
        Intent intent = AccountPicker.newChooseAccountIntent(null, null, new String[]{"com.google"}, false, null, null, null, null);
        startActivityForResult(intent, CHOOSE_ACCOUNT);
    }

    // Fetch the access token asynchronously.
    void getAndUseAuthTokenInAsyncTask(Account account) {
        AsyncTask<Account, String, String> task = new AsyncTask<Account, String, String>() {
            ProgressDialog progressDlg;
            AsyncTask<Account, String, String> me = this;

            @Override
            protected void onPreExecute() {
                progressDlg = new ProgressDialog(ctx, ProgressDialog.STYLE_SPINNER);
                progressDlg.setMax(100);
                progressDlg.setTitle("Validating...");
                progressDlg.setMessage("Verifying the login data you entered...\n\nThis action will time out after 10 seconds.");
                progressDlg.setCancelable(false);
                progressDlg.setIndeterminate(false);
                progressDlg.setOnCancelListener(new android.content.DialogInterface.OnCancelListener() {
                    public void onCancel(DialogInterface d) {
                        progressDlg.dismiss();
                        me.cancel(true);
                    }
                });
                progressDlg.show();
            }

            @Override
            protected String doInBackground(Account... params) {
                return getAccessToken(params[0]);
            }

            @Override
            protected void onPostExecute(String s) {
                if (s == null) {
                    // Wait for the extra intent
                } else {
                    accountName = s;
                    getDriveFiles();
                }
                progressDlg.dismiss();
            }
        };
        task.execute(account);
    }

    /**
     * Fetches the token from a particular Google account chosen by the user.  DO NOT RUN THIS DIRECTLY.  It must be run asynchronously inside an AsyncTask.
     * @param activity
     * @param account
     * @return
     */
    private String getAccessToken(Account account) {
        try {
            return GoogleAuthUtil.getToken(ctx, account.name, "oauth2:" + DriveScopes.DRIVE_READONLY);  // IMPORTANT: DriveScopes must be changed depending on what level of access you want
        } catch (UserRecoverableAuthException e) {
            // Start the Approval Screen intent, if not run from an Activity, add the Intent.FLAG_ACTIVITY_NEW_TASK flag.
            a.startActivityForResult(e.getIntent(), REQUEST_TOKEN);
            e.printStackTrace();
            return null;
        } catch (GoogleAuthException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    private Drive getDriveService() {
        HttpTransport ht = AndroidHttp.newCompatibleTransport();             // Makes a transport compatible with both Android 2.2- and 2.3+
        JacksonFactory jf = new JacksonFactory();                            // You need a JSON parser to help you out with the API response
        Credential credential = new Credential(BearerToken.authorizationHeaderAccessMethod()).setAccessToken(accountName);
        HttpRequestFactory rf = ht.createRequestFactory(credential);
        Drive.Builder b = new Drive.Builder(ht, jf, null);
        b.setJsonHttpRequestInitializer(new JsonHttpRequestInitializer() {

            @Override
            public void initialize(JsonHttpRequest request) throws IOException {
                DriveRequest driveRequest = (DriveRequest) request;
                driveRequest.setPrettyPrint(true);
                driveRequest.setOauthToken(accountName);
            }
        });
        return b.build();
    }

    /**
     * Obtains a list of all files on the signed-in user's Google Drive account.
     */
    private void getDriveFiles() {
        Drive service = getDriveService();
        Log.d("SiteTrack", "FUNCTION getDriveFiles()");
        Files.List request;
        try {
            request = service.files().list(); // .setQ("mimeType=\"text/plain\"");
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }
        do {
            FileList files;
            try {
                Log.d("SiteTrack", request.toString());
                files = request.execute();
            } catch (IOException e) {
                e.printStackTrace();
                Log.d("SiteTrack", "Exception");
                return;
            }
            ArrayList<File> fileList = (ArrayList<File>) files.getItems();
            Log.d("SiteTrack", "Files found: " + files.getItems().size());
            for (File f : fileList) {
                String fileId = f.getId();
                String title = f.getTitle();
                Log.d("SiteTrack", "File " + fileId + ": " + title);
            }
            request.setPageToken(files.getNextPageToken());
        } while (request.getPageToken() != null && request.getPageToken().length() >= 0);
    }

    protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        if (requestCode == CHOOSE_ACCOUNT && resultCode == RESULT_OK) {
            accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
            GoogleAccountManager gam = new GoogleAccountManager(this);
            getAndUseAuthTokenInAsyncTask(gam.getAccountByName(accountName));
            Log.d("SiteTrack", "CHOOSE_ACCOUNT");
        } else if (requestCode == REQUEST_TOKEN && resultCode == RESULT_OK) {
            accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
            Log.d("SiteTrack", "REQUEST_TOKEN");
        }
    }   
}

これが私のマニフェストです:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.googledrive.googledriveapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="android.app.ActivityGroup" />
        </activity>
    </application>
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
</manifest>

そして、これが私が受け取ったLogCatエラーです。アプリが最初に起動されたときに発生します。

10-27 12:01:43.872: E/AndroidRuntime(1117): FATAL EXCEPTION: main
10-27 12:01:43.872: E/AndroidRuntime(1117): java.lang.VerifyError: com/googledrive/googledriveapp/MainActivity
10-27 12:01:43.872: E/AndroidRuntime(1117):     at java.lang.Class.newInstanceImpl(Native Method)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at java.lang.Class.newInstance(Class.java:1319)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.os.Looper.loop(Looper.java:137)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at android.app.ActivityThread.main(ActivityThread.java:4745)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at java.lang.reflect.Method.invokeNative(Native Method)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at java.lang.reflect.Method.invoke(Method.java:511)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-27 12:01:43.872: E/AndroidRuntime(1117):     at dalvik.system.NativeStart.main(Native Method)

誰でも助けてもらえますか?

4

1 に答える 1

3

(チュートリアルの補足として、Eclipse に追加させてください。Android SDK Manager に移動して、Google Play Services をダウンロードする必要があります。次に、google-play-services.jar ファイルを見つけて、それを「外部 JAR」として追加します。 」をEclipseプロジェクトに追加しました。オフラインでOPと話しましたが、彼はすでにこれを行っていましたが、言及するのを忘れていました.)

コードは単独では機能しません。これを既存のアプリケーションに追加し、UI のどこかに btn_drive を追加して、ユーザーが Google ドライブに接続できるようにすることが期待されます。幸いなことに、このコードを使用して Android アプリを作成するのはかなり簡単ですが、新しいプロジェクトを作成してこれを追加するだけの方がおそらくさらに簡単でしょう。

まず、onCreate で、その「その他のアプリケーション ロジック」セクションを次のように置き換えます。

    super.onCreate(savedInstanceState);
    // set up the GUI layout
    setContentView(R.layout.main);
    // set the variables to access the GUI controls
    btn_drive = (Button) findViewById(R.id.btn_drive);

次に、非常に基本的な XML レイアウトが必要です。res/layout に main.xml (または上記の setContentView で R.layout と呼んだもの) という新しいファイルを作成します。

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_drive"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Connect to Google Drive" />
</LinearLayout>

最後に、マニフェストで次の権限が必要になる場合があります。

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

頑張ってください!

于 2012-10-27T18:53:57.557 に答える