这是一个复杂的过程，但它可以做到！我写了一篇关于启动和运行基础知识的博客文章。而且我还发布了一个开源项目，它实际上很有用，但仍然非常少。它使用 OAuth，因此可以直接从 Android 的权限模型中提取权限（没有硬编码的电子邮件/密码！）。
您需要一些东西来启动“选择帐户意图”：
View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
Intent intent = AccountPicker.newChooseAccountIntent(null, null, new String[]{"com.google"},
false, null, null, null, null);
startActivityForResult(intent, 1);
if (AUTO_HIDE) {
delayedHide(AUTO_HIDE_DELAY_MILLIS);
}
return false;
}
};
然后当该意图返回时，您可以尝试使用返回的令牌（尽管请注意，如果这是用户第一次可能必须明确授权您的程序；那就是 UserRecoverableAuthException）：
protected void onActivityResult(final int requestCode, final int resultCode,
final Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
final String accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
System.err.println(accountName);
(new AsyncTask<String, String,String>(){
@Override
protected String doInBackground(String... arg0) {
try {
// Turn account name into a token, which must
// be done in a background task, as it contacts
// the network.
String token =
GoogleAuthUtil.getToken(
FullscreenActivity.this,
accountName,
"oauth2:https://spreadsheets.google.com/feeds https://docs.google.com/feeds");
System.err.println("Token: " + token);
// Now that we have the token, can we actually list
// the spreadsheets or anything...
SpreadsheetService s =
new SpreadsheetService("Megabudget");
s.setAuthSubToken(token);
// Define the URL to request. This should never change.
// (Magic URL good for all users.)
URL SPREADSHEET_FEED_URL = new URL(
"https://spreadsheets.google.com/feeds/spreadsheets/private/full");
// Make a request to the API and get all spreadsheets.
SpreadsheetFeed feed;
try {
feed = s.getFeed(SPREADSHEET_FEED_URL, SpreadsheetFeed.class);
List<SpreadsheetEntry> spreadsheets = feed.getEntries();
// Iterate through all of the spreadsheets returned
for (SpreadsheetEntry spreadsheet : spreadsheets) {
// Print the title of this spreadsheet to the screen
System.err.println(spreadsheet.getTitle().getPlainText());
}
} catch (ServiceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (UserRecoverableAuthException e) {
// This is NECESSARY so the user can say, "yeah I want
// this app to have permission to read my spreadsheet."
Intent recoveryIntent = e.getIntent();
startActivityForResult(recoveryIntent, 2);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (GoogleAuthException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}}).execute();
} else if (requestCode == 2 && resultCode == RESULT_OK) {
// After the user YAYs or NAYs our permission request, we are
// taken here, so if we wanted to grab the token now we could.
}
}