我正在尝试实施Stephen Wylie的Google Drive示例(
here).这是我的代码：
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) {
super.onCreate(savedInstanceState);
// set up the GUI layout
setContentView(R.layout.activity_main);
// set the variables to access the GUI controls
btn_drive = (Button) findViewById(R.id.btn_drive);
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);
startActivityForResult(intent,CHOOSE_ACCOUNT);
}
// Fetch the access token asynchronously.
void getAndUseAuthTokenInAsyncTask(Account account) {
AsyncTask<Account,String,String> task = new AsyncTask<Account,String>() {
ProgressDialog progressDlg;
AsyncTask<Account,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");
}
}
}
这是我的清单：
<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" />
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
这是我的activity_main.xml：
<?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>
这是我收到的LogCat错误.按下按钮时会发生：
10-28 00:25:28.637: E/AndroidRuntime(842): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=com.google.android.gms.common.account.CHOOSE_ACCOUNT (has extras) }
10-28 00:25:28.637: E/AndroidRuntime(842): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1512)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.app.Activity.startActivityForResult(Activity.java:3190)
10-28 00:25:28.637: E/AndroidRuntime(842): at com.googledrive.googledriveapp.MainActivity.chooseAccount(MainActivity.java:67)
10-28 00:25:28.637: E/AndroidRuntime(842): at com.googledrive.googledriveapp.MainActivity$1.onClick(MainActivity.java:60)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.view.View.performClick(View.java:3511)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.view.View$PerformClick.run(View.java:14105)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.os.Handler.handleCallback(Handler.java:605)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.os.Handler.dispatchMessage(Handler.java:92)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.os.Looper.loop(Looper.java:137)
10-28 00:25:28.637: E/AndroidRuntime(842): at android.app.ActivityThread.main(ActivityThread.java:4424)
10-28 00:25:28.637: E/AndroidRuntime(842): at java.lang.reflect.Method.invokeNative(Native Method)
10-28 00:25:28.637: E/AndroidRuntime(842): at java.lang.reflect.Method.invoke(Method.java:511)
10-28 00:25:28.637: E/AndroidRuntime(842): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-28 00:25:28.637: E/AndroidRuntime(842): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-28 00:25:28.637: E/AndroidRuntime(842): at dalvik.system.NativeStart.main(Native Method)
任何人都可以帮忙吗？
解决方法
谷歌云端硬盘API似乎(根据谷歌人的说法)仅适用于真实设备,在模拟器中它会因此错误而崩溃.
所以我的建议,尝试一个真正的设备.
