您好我正在使用picasa示例为Android并修改它但我没有得到任何文件列表Plz帮助我发布我的修改后的课程休息与picasa示例相同？Plz帮助
获得400 bad request in executeRefreshAlbums()方法
FetchGooleDocsActivity（这是主要的活动）
package com.fetchgoogledocs;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ListActivity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore.Images;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import com.google.api.client.googleapis.GoogleHeaders;
import com.google.api.client.googleapis.GoogleTransport;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.HttpResponseException;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.InputStreamContent;
import com.google.api.client.xml.atom.AtomParser;
public class FetchGooleDocsActivity extends ListActivity {
private static final String AUTH_TOKEN_TYPE = "writely";
private static final String TAG = "PrinterAppGDOCS";
private static final int REQUEST_AUTHENTICATE = 0;
private static final String PREF = "MyPrefs";
private static final int DIALOG_ACCOUNTS = 0;
private static HttpTransport transport;
private String authToken;
private static Context context;
private String postLink;
private final List<AlbumEntry> albums = new ArrayList<AlbumEntry>();
//private final List<AlbumEntry> albums = new ArrayList<AlbumEntry>();
public FetchGooleDocsActivity() {
transport = GoogleTransport.create();
GoogleHeaders headers = (GoogleHeaders) transport.defaultHeaders;
headers.setApplicationName("PrinterApp/1.0");
headers.gdataVersion = "2";
AtomParser parser = new AtomParser();
parser.namespaceDictionary = Util.NAMESPACE_DICTIONARY;
transport.addParser(parser);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context=this;
SharedPreferences settings = getSharedPreferences(PREF, 0);
setLogging(settings.getBoolean("logging", false));
getListView().setTextFilterEnabled(true);
registerForContextMenu(getListView());
Intent intent = getIntent();
if (Intent.ACTION_SEND.equals(intent.getAction())) {
sendData = new SendData(intent, getContentResolver());
Toast.makeText(context, "Send data initilize", Toast.LENGTH_SHORT).show();
} else if (Intent.ACTION_MAIN.equals(getIntent().getAction())) {
sendData = null;
}
gotAccount(false);
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_ACCOUNTS:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select a Google account");
final AccountManager manager = AccountManager.get(this);
final Account[] accounts = manager.getAccountsByType("com.google");
final int size = accounts.length;
String[] names = new String[size];
for (int i = 0; i < size; i++) {
names[i] = accounts[i].name;
}
builder.setItems(names, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
gotAccount(manager, accounts[which]);
}
});
return builder.create();
}
return null;
}
private void gotAccount(boolean tokenExpired) {
SharedPreferences settings = getSharedPreferences(PREF, 0);
String accountName = settings.getString("accountName", null);
if (accountName != null) {
AccountManager manager = AccountManager.get(this);
Account[] accounts = manager.getAccountsByType("com.google");
int size = accounts.length;
for (int i = 0; i < size; i++) {
Account account = accounts[i];
if (accountName.equals(account.name)) {
if (tokenExpired) {
manager.invalidateAuthToken("com.google", this.authToken);
}
gotAccount(manager, account);
return;
}
}
}
showDialog(DIALOG_ACCOUNTS);
}
private void gotAccount(final AccountManager manager, final Account account) {
SharedPreferences settings = getSharedPreferences(PREF, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("accountName", account.name);
editor.commit();
new Thread() {
@Override
public void run() {
try {
final Bundle bundle =
manager.getAuthToken(account, AUTH_TOKEN_TYPE, true, null, null)
.getResult();
runOnUiThread(new Runnable() {
public void run() {
try {
if (bundle.containsKey(AccountManager.KEY_INTENT)) {
Intent intent =
bundle.getParcelable(AccountManager.KEY_INTENT);
int flags = intent.getFlags();
flags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;
intent.setFlags(flags);
startActivityForResult(intent, REQUEST_AUTHENTICATE);
} else if (bundle.containsKey(AccountManager.KEY_AUTHTOKEN)) {
authenticatedClientLogin(
bundle.getString(AccountManager.KEY_AUTHTOKEN));
}
} catch (Exception e) {
handleException(e);
}
}
});
} catch (Exception e) {
handleException(e);
}
}
}.start();
}
@Override
protected void onActivityResult(
int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_AUTHENTICATE:
if (resultCode == RESULT_OK) {
gotAccount(false);
} else {
showDialog(DIALOG_ACCOUNTS);
}
break;
}
}
private void authenticatedClientLogin(String authToken) {
this.authToken = authToken;
((GoogleHeaders) transport.defaultHeaders).setGoogleLogin(authToken);
authenticated();
}
static class SendData {
String fileName;
Uri uri;
String contentType;
long contentLength;
SendData(Intent intent, ContentResolver contentResolver) {
Toast.makeText(context, "Send data", Toast.LENGTH_SHORT).show();
Bundle extras = intent.getExtras();
if (extras.containsKey(Intent.EXTRA_STREAM)) {
Uri uri = this.uri = (Uri) extras.getParcelable(Intent.EXTRA_STREAM);
String scheme = uri.getScheme();
Toast.makeText(context, scheme, Toast.LENGTH_LONG).show();
if (scheme.equals("content")) {
Cursor cursor = contentResolver.query(uri, null, null, null, null);
cursor.moveToFirst();
this.fileName = cursor.getString(
cursor.getColumnIndexOrThrow(Images.Media.DISPLAY_NAME));
this.contentType = intent.getType();
this.contentLength =
cursor.getLong(cursor.getColumnIndexOrThrow(Images.Media.SIZE));
}
}
}
}
static SendData sendData;
private void authenticated() {
if (sendData != null) {
try {
if (sendData.fileName != null) {
boolean success = false;
try {
HttpRequest request = transport.buildPostRequest();
request.url = GdocUrl.relativeToRoot(
"default/private/full");
Toast.makeText(context, request.url.toString(), Toast.LENGTH_LONG).show();
((GoogleHeaders) request.headers).setSlugFromFileName(
sendData.fileName);
InputStreamContent content = new InputStreamContent();
content.inputStream =
getContentResolver().openInputStream(sendData.uri);
content.type = sendData.contentType;
content.length = sendData.contentLength;
request.content = content;
request.execute().ignore();
success = true;
} catch (IOException e) {
handleException(e);
}
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
new String[] {success ? "OK" : "ERROR"}));
}
} finally {
sendData = null;
}
} else {
executeRefreshAlbums();
}
}
private void executeRefreshAlbums() {
String[] albumNames;
List<AlbumEntry> albums = this.albums;
albums.clear();
try {
GdocUrl url = GdocUrl.relativeToRoot("default/private/full");
// page through results
while (true) {
UserFeed userFeed = UserFeed.executeGet(transport, url);
this.postLink = userFeed.getPostLink();
if (userFeed.albums != null) {
albums.addAll(userFeed.albums);
}
String nextLink = userFeed.getNextLink();
if (nextLink == null) {
break;
}
}
int numAlbums = albums.size();
albumNames = new String[numAlbums];
for (int i = 0; i < numAlbums; i++) {
albumNames[i] = albums.get(i).title;
}
} catch (IOException e) {
Toast.makeText(context, e.getMessage(), Toast.LENGTH_LONG).show();
handleException(e);
albumNames = new String[] {e.getMessage()};
albums.clear();
}
setListAdapter(new ArrayAdapter<String>(
this, android.R.layout.simple_list_item_1, albumNames));
Toast.makeText(context, albumNames.toString(), Toast.LENGTH_LONG).show();
}
private void setLogging(boolean logging) {
Logger.getLogger("com.google.api.client").setLevel(
logging ? Level.CONFIG : Level.OFF);
SharedPreferences settings = getSharedPreferences(PREF, 0);
boolean currentSetting = settings.getBoolean("logging", false);
if (currentSetting != logging) {
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("logging", logging);
editor.commit();
}
}
private void handleException(Exception e) {
e.printStackTrace();
SharedPreferences settings = getSharedPreferences(PREF, 0);
boolean log = settings.getBoolean("logging", false);
if (e instanceof HttpResponseException) {
HttpResponse response = ((HttpResponseException) e).response;
int statusCode = response.statusCode;
try {
response.ignore();
} catch (IOException e1) {
e1.printStackTrace();
}
if (statusCode == 401 || statusCode == 403) {
gotAccount(true);
return;
}
if (log) {
try {
Log.e(TAG, response.parseAsString());
} catch (IOException parseException) {
parseException.printStackTrace();
}
}
}
if (log) {
Log.e(TAG, e.getMessage(), e);
}
}
}
GdocUrl
package com.fetchgoogledocs;
import com.google.api.client.googleapis.GoogleUrl;
import com.google.api.client.util.Key;
/**
* @author Yaniv Inbar
*/
public class GdocUrl extends GoogleUrl {
public static final String ROOT_URL = "https://docs.google.com/feeds/";
@Key
public String kinds;
public GdocUrl(String encodedUrl) {
super(encodedUrl);
}
/**
* Constructs a new URL based on the given relative path.
*
* @param relativePath encoded path relative to the {@link #ROOT_URL}
* @return new URL
*/
public static GdocUrl relativeToRoot(String relativePath) {
return new GdocUrl(ROOT_URL + relativePath);
}
}
Mainfest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.google.api.client.sample.picasa"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<application android:icon="@drawable/icon" android:label="@string/app_name"
android:debuggable="true">
<activity android:name=".PicasaDemoActivity" android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND"></action>
<category android:name="android.intent.category.DEFAULT"></category>
<data android:mimeType="image/*"></data>
</intent-filter>
</activity>
</application>
</manifest>
UserFeed
import com.google.api.client.http.HttpTransport;
import com.google.api.client.util.Key;
import java.io.IOException;
import java.util.List;
public class UserFeed extends Feed {
@Key("entry")
public List<AlbumEntry> albums;
public static UserFeed executeGet(HttpTransport transport, GdocUrl url)
throws IOException {
url.kinds = "album";
return (UserFeed) Feed.executeGet(transport, url, UserFeed.class);
}
}
饲料
import com.google.api.client.googleapis.xml.atom.GData;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.util.Key;
import java.io.IOException;
import java.util.List;
/**
* @author Yaniv Inbar
*/
public class Feed {
@Key("link")
public List<Link> links;
public String getPostLink() {
return Link.find(links, "http://schemas.google.com/g/2005#post");
}
public String getNextLink() {
return Link.find(links, "next");
}
static Feed executeGet(HttpTransport transport, GdocUrl url,
Class<? extends Feed> feedClass) throws IOException {
url.fields = GData.getFieldsFor(feedClass);
HttpRequest request = transport.buildGetRequest();
request.url = url;
return request.execute().parseAs(feedClass);
}
}
我认为我的问题在于Feed或Userfeed类因为我不知道接下来要在网址中放什么
答案 0 :(得分：4)
您需要设置版本。在名为Specifying a Version ...
的API文档部分中如果您向使用仅提供的功能的API发出请求 版本3，但忘记设置版本，你很可能会收到 400 Bad Request响应。由于URL结构不同 在版本2和版本3之间，这是新用户常犯的错误 的API。
要指定版本号，请使用GData-Version HTTP标头。该 此标头的值必须为3.0。小数和零是 必需的。
GData-Version: 3.0
或者，您可以在URL中指定v = 3作为查询参数。 在剥离HTTP的防火墙后面工作时经常需要这样做 标头，或来自一些JavaScript请求。使用HTTP标头是 尽可能推荐。
https://docs.google.com/feeds/default/private/full?v=3