Retrieve account name with the NEW Google Drive AP

问题:

I set up the authorization process for Google Play Services as described under https://developers.google.com/drive/android/auth

Now that the user has authorized the app I want to retrieve the account name. But I can't find any method in the API (http://developer.android.com/reference/gms-packages.html) that would be helpful.

回答1:

I assume that you already have QUICKSTART or DEMO, or something similar up-and-running, so I will refer to these 2 examples. In the BaseDemoActivity.java code, you'll notice that account selection is invoked when connection fails,

@Override public void onConnectionFailed(ConnectionResult result) {
  ...
  result.startResolutionForResult(this, REQUEST_CODE_RESOLUTION);
  ...
}

... and it comes back in onActivityResult(). I just grab the intent data and get the KEY_ACCOUNT_NAME, it is the selected email. The code below is modified from the DEMO's BaseDemoActivity.java (I mentioned above).

@Override protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
  switch (requestCode) {
    case REQUEST_CODE_RESOLUTION:
    if ((resultCode == RESULT_OK) && (data != null) && (data.getExtras() != null ))
      // user selected account, get it
      String email = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
    else
      finish();    // user cancelled selection, an easy solution
    break;
  }

Hope it helps.

回答2:

Looks like data Intent is always null :(

public void startResolutionForResult(Activity var1, int var2) throws SendIntentException {
    if(this.hasResolution()) {
        var1.startIntentSenderForResult(this.mPendingIntent.getIntentSender(), var2, (Intent)null, 0, 0, 0);
    }
}

This code is from ConnectionResult.class

回答3:

1. Check if user signed or not

   GoogleSignInClient mGoogleSignInClient;
       private void setupAuthorization() {
           GoogleSignInOptions signInOptions =
                   new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                           .requestEmail() // add it if you want to user email 
                           .requestScopes(Drive.SCOPE_FILE)
                           .build();
           mGoogleSignInClient = GoogleSignIn.getClient(this, signInOptions);
           mGoogleSignInClient.silentSignIn().addOnSuccessListener(googleSignInAccount -> {googleSignInAccount.getEmail()}).addOnFailureListener(e -> {});
   }
   

2. If you want to get email and name after signing in

   @Override protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case REQUEST_CODE_DRIVE_SIGN_IN: Log.i(TAG, "Sign in request code"); // Called after user is signed in. if (resultCode == RESULT_OK) { Log.i(TAG, "Signed in successfully."); // Use the last signed in account here since it already have a Drive scope. GoogleSignInAccount googleSignInAccount = GoogleSignIn.getLastSignedInAccount(this); googleSignInAccount.getEmail(); mDriveClient = Drive.getDriveClient(this, GoogleSignIn.getLastSignedInAccount(this)); // Build a drive resource client. mDriveResourceClient = Drive.getDriveResourceClient(this, GoogleSignIn.getLastSignedInAccount(this)); } break;}}

The details could be found here