所以我终于实现了用户选择在我尝试做oAuth2时使用哪个gmail帐户的能力....我有几个oAuth2问题，但遗憾的是没有得到答案..无论如何我点击了标志后在按钮中，系统会提示我选择哪个gmail帐户。但是，在我选择它并点击“确定”后，应用程序崩溃了。但是，我不确定为什么。
这是我的MainActivity.java
<activity />这是给出的错误。
public class MainActivity extends AppCompatActivity{
Context mContext = MainActivity.this;
private AccountManager mAccountManager;
private AuthPreferences authPreferences;
String[] avail_accounts;
ListView list;
ArrayAdapter<String> adapter;
EditText emailText;
TextView responseView;
ProgressBar progressBar;
SharedPreferences pref;
static final String API_KEY = "USE_YOUR_OWN_API_KEY";
static final String API_URL = "https://api.fullcontact.com/v2/person.json?";
static final String ClientId= "45471411055-m902j8c6jo4v6mndd2jiuqkanjsvcv6j.apps.googleusercontent.com";
static final String ClientSecret = "it5cGajZGSHQw5-e2kn2zL_R";
static final String SCOPE = "https://www.googleapis.com/auth/userinfo.email";
static final String AuthUrl = "https://accounts.google.com/o/oauth2/token";
private static final int AUTHORIZATION_CODE = 1993;
private static final int ACCOUNT_CODE = 1601;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
responseView = (TextView) findViewById(R.id.responseView);
emailText = (EditText) findViewById(R.id.emailText);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
final Context context = this;
mAccountManager = AccountManager.get(this);
authPreferences = new AuthPreferences(this);
SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
signInButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(authPreferences.getUser() != null && authPreferences.getToken() !=null)
{
doCoolAuthenticatedStuff();
}else
{
chooseAccount();
}
}
});
Button queryButton = (Button) findViewById(R.id.queryButton);
queryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new RetrieveFeedTask().execute();
if(isNetworkAvailable()==true)
{
Intent intent = new Intent(context, NavDrawerActivity.class);
startActivity(intent);
}else {
Toast.makeText(MainActivity.this, "No Network Service, please check your WiFi or Mobile Data Connection", Toast.LENGTH_SHORT).show();
}
}
});
SharedPreferences sharedPref = getPreferences(Context.MODE_PRIVATE);
boolean dontShowDialog = sharedPref.getBoolean("DONT_SHOW_DIALOG", false);
if (!dontShowDialog) {
WifivsDataDialog myDiag = new WifivsDataDialog();
myDiag.show(getFragmentManager(), "WiFi");
myDiag.setCancelable(false);
}
}
private void doCoolAuthenticatedStuff()
{
Log.e("AuthApp", authPreferences.getToken());
}
private void chooseAccount()
{
Intent intent = AccountManager.newChooseAccountIntent(null, null,new String[] { "com.google"}, false, null, null, null, null);
startActivityForResult(intent, ACCOUNT_CODE);
}
private void requestToken()
{
Account userAccount = null;
String user = authPreferences.getUser();
for (Account account : mAccountManager.getAccountsByType("com.google")) {
if (account.name.equals(user)) {
userAccount = account;
break;
}
}
mAccountManager.getAuthToken(userAccount, "oauth2:" + SCOPE, null, this,
new OnTokenAcquired(), null);
}
private void invalidateToken()
{
AccountManager mAccountManager = AccountManager.get(this);
mAccountManager.invalidateAuthToken("com.google", authPreferences.getToken());
authPreferences.setToken(null);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == AUTHORIZATION_CODE) {
requestToken();
} else if (requestCode == ACCOUNT_CODE) {
String accountName = data
.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
authPreferences.setUser(accountName);
// invalidate old tokens which might be cached. we want a fresh
// one, which is guaranteed to work
invalidateToken();
requestToken();
}
}
}
private class OnTokenAcquired implements AccountManagerCallback<Bundle>
{
@Override
public void run(AccountManagerFuture<Bundle> result)
{
try {
Bundle bundle = result.getResult();
Intent launch = (Intent) bundle.get(AccountManager.KEY_INTENT);
if(launch != null)
{
startActivityForResult(launch, AUTHORIZATION_CODE);
} else {
String token = bundle.getString(AccountManager.KEY_AUTHTOKEN);
authPreferences.setToken(token);
doCoolAuthenticatedStuff();
}
} catch (Exception e){
Log.e("ERROR", e.getMessage(), e);
}
}
}
public boolean isNetworkAvailable()
{
ConnectivityManager cm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = cm.getActiveNetworkInfo();
if(networkInfo != null && networkInfo.isConnected())
{
Log.e("Network Testing", "Available");
return true;
}
Log.e("Network Testing", "Not Available");
return false;
}
class RetrieveFeedTask extends AsyncTask<Void, Void, String> {
private Exception exception;
protected void onPreExecute() {
progressBar.setVisibility(View.VISIBLE);
responseView.setText("");
}
protected String doInBackground(Void... urls) {
String email = emailText.getText().toString();
// Do some validation here
try {
URL url = new URL(API_URL + "email=" + email + "&apiKey=" + API_KEY);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
bufferedReader.close();
return stringBuilder.toString();
}
finally{
urlConnection.disconnect();
}
}
catch(Exception e) {
Log.e("ERROR", e.getMessage(), e);
return null;
}
}
protected void onPostExecute(String response) {
if(response == null) {
response = "THERE WAS AN ERROR";
}
progressBar.setVisibility(View.GONE);
Log.i("INFO", response);
responseView.setText(response);
//
// TODO: check this.exception
// TODO: do something with the feed
// try {
// JSONObject object = (JSONObject) new JSONTokener(response).nextValue();
// String requestID = object.getString("requestId");
// int likelihood = object.getInt("likelihood");
// JSONArray photos = object.getJSONArray("photos");
// .
// .
// .
// .
// } catch (JSONException e) {
// e.printStackTrace();
// }
}
}
}
如果有人有任何想法，那将非常感激。此外，我还需要使用选定的Gmail帐户执行oAuth2。
这是我的AndroidManifest.xml
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.jamessingleton.chffrapi, PID: 2025
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1601, result=-1, data=Intent { VirtualScreenParam=Params{mDisplayId=-1, null, mFlags=0x00000000)}(has extras) }} to activity {com.example.jamessingleton.chffrapi/com.example.jamessingleton.chffrapi.MainActivity}: java.lang.IllegalArgumentException: account is null
at android.app.ActivityThread.deliverResults(ActivityThread.java:4920)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4963)
at android.app.ActivityThread.access$1600(ActivityThread.java:221)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1848)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.IllegalArgumentException: account is null
at android.accounts.AccountManager.getAuthToken(AccountManager.java:1267)
at com.example.jamessingleton.chffrapi.MainActivity.requestToken(MainActivity.java:152)
at com.example.jamessingleton.chffrapi.MainActivity.onActivityResult(MainActivity.java:181)
at android.app.Activity.dispatchActivityResult(Activity.java:7137)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4916)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4963)
at android.app.ActivityThread.access$1600(ActivityThread.java:221)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1848)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
这是我的AuthPreferences.java
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jamessingleton.chffrapi">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCOUNT_MANAGER" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.UPDATE_DEVICE_STATS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<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:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version"/>
<meta-data android:name="com.google.android.geo.API_KEY" android:value=""/>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NavDrawerActivity"
android:label="@string/title_activity_nav_drawer"
android:theme="@style/AppTheme.NoActionBar"></activity>
</application>
</manifest>
答案 0 :(得分：0)
适用于Java的Drive API客户端库调用GoogleAuthUtil.getToken（），这需要GET_ACCOUNTS权限。您需要在清单文件中拥有该权限。