我正在创建一个需要使用Twitter帐户登录作为身份验证方法的应用。然后它将Twitter帐户链接到Firebase。
我认为签名工作正常，但是与Firebase链接存在问题，就像某些数据未正确检索导致NullPointException一样。
我的活动有两个不同名称的Twitter签名按钮。
这是我的onCreate()
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Twitter.initialize(this);
TwitterConfig config = new TwitterConfig.Builder(this)
.logger(new DefaultLogger(Log.DEBUG))
.twitterAuthConfig(new TwitterAuthConfig(twitterKey,twitterSecret))
.debug(true)
.build();
Twitter.initialize(config);
setContentView(R.layout.activity_sign);
这是将回调设置为Twitter登录按钮的功能：
void setTwitterButtonsPress()
{
final Callback<TwitterSession> callback= new Callback<TwitterSession>() {
@Override
public void success(final Result<TwitterSession> result) {
progressBar.setVisibility(View.VISIBLE);
progressBar.getParent().bringChildToFront(progressBar);
progressBarVisibility=true;
AuthCredential credential = TwitterAuthProvider.getCredential(
result.data.getAuthToken().token,
result.data.getAuthToken().secret);
mAuth.signInWithCredential(credential).addOnCompleteListener(new OnCompleteListener<AuthResult>() {///this is where i get the error
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
progressBar.setVisibility(View.GONE);
progressBarVisibility=false;
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
if(e.getMessage().equals("A network error (such as timeout, interrupted connection or unreachable host) has occurred."))
{
Toast.makeText(getBaseContext(),getString(R.string.noConnection),Toast.LENGTH_LONG).show();
}
else if(e.getMessage().contains("If you believe the country of origin was incorrectly identified"))
{
Toast.makeText(getBaseContext(),getString(R.string.notAvailableInLocation),Toast.LENGTH_LONG).show();
}
else if(e.getMessage().startsWith("An account already exists with the same email address but different sign-in credentials"))
{
Toast.makeText(getBaseContext(),getString(R.string.other_credential),Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getBaseContext(),e.getMessage(),Toast.LENGTH_LONG).show();
}
CookieSyncManager.createInstance(getBaseContext());
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.removeSessionCookie();
//Twitter.getSessionManager().clearActiveSession();
//Twitter.logOut();
TwitterCore.getInstance().getSessionManager().clearActiveSession();
}
}).addOnSuccessListener(new OnSuccessListener<AuthResult>() {
@Override
public void onSuccess(AuthResult authResult) {
Intent intent=new Intent(getBaseContext(),add_password_activity.class);
intent.putExtra("checked",true);
startActivity(intent);
finish();
}
});
}
@Override
public void failure(TwitterException e) {
Toast.makeText(getBaseContext(),e.getMessage(),Toast.LENGTH_LONG).show();
}
};
TwitterSignUp.setCallback(callback);
twitterSignIn.setCallback(callback);
}
这是onActivityResult()函数，只有最后两行很重要：
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
callbackManagerFacebook.onActivityResult(requestCode, resultCode, data);
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == googleSign)
{
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
GoogleSignInAccount account = task.getResult(ApiException.class);
AuthCredential credential = GoogleAuthProvider.getCredential(account.getIdToken(), null);
progressBar.setVisibility(View.VISIBLE);
progressBar.getParent().bringChildToFront(progressBar);
progressBarVisibility=true;
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
progressBar.setVisibility(View.GONE);
progressBarVisibility=false;
}
}).addOnSuccessListener(new OnSuccessListener<AuthResult>() {
@Override
public void onSuccess(AuthResult authResult) {
Intent intent=new Intent(getBaseContext(),add_password_activity.class);
intent.putExtra("checked",true);
startActivity(intent);
finish();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
if(e.getMessage().equals("A network error (such as timeout, interrupted connection or unreachable host) has occurred."))
{
Toast.makeText(getBaseContext(),getString(R.string.noConnection),Toast.LENGTH_LONG).show();
}
else if(e.getMessage().contains("If you believe the country of origin was incorrectly identified"))
{
Toast.makeText(getBaseContext(),getString(R.string.notAvailableInLocation),Toast.LENGTH_LONG).show();
}
else if(e.getMessage().startsWith("An account already exists with the same email address but different sign-in credentials"))
{
Toast.makeText(getBaseContext(),getString(R.string.other_credential),Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getBaseContext(),e.getMessage(),Toast.LENGTH_LONG).show();
}
googleSignInClient.signOut();
}
});
} catch (ApiException e) {
if(e.getMessage().contains("12500:"))
{
Intent intent=new Intent(getBaseContext(),update_play_services.class);
startActivity(intent);
}
else if(e.getMessage().contains("7:"))
{
Toast.makeText(getBaseContext(),getString(R.string.noConnection),Toast.LENGTH_LONG).show();
}
else Toast.makeText(getBaseContext(),e.getMessage(),Toast.LENGTH_LONG).show();
}
}
if(data!=null)TwitterSignUp.onActivityResult(requestCode, resultCode, data);
if(data!=null)twitterSignIn.onActivityResult(requestCode, resultCode, data);
}
我将fabric io的元数据放在清单文件中，如下所示：
<meta-data
android:name="io.fabric.ApiKey"
android:value="***************************" />
这是数据中的错误消息：
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=140, result=-1, data=Intent { (has extras) }} to activity {arb.passwordmanager/arb.passwordmanager.Sign}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3433)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3476)
at android.app.ActivityThread.access$1200(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1337)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5317)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.google.android.gms.internal.zzdza.zzb(Unknown Source)
at com.google.android.gms.internal.zzdzh.zza(Unknown Source)
at com.google.firebase.auth.FirebaseAuth.signInWithCredential(Unknown Source)
at arb.passwordmanager.Sign$10.success(Sign.java:616)
at com.twitter.sdk.android.core.identity.TwitterAuthClient$CallbackWrapper.success(TwitterAuthClient.java:238)
at com.twitter.sdk.android.core.identity.AuthHandler.handleOnActivityResult(AuthHandler.java:92)
at com.twitter.sdk.android.core.identity.TwitterAuthClient.onActivityResult(TwitterAuthClient.java:171)
at com.twitter.sdk.android.core.identity.TwitterLoginButton.onActivityResult(TwitterLoginButton.java:130)
at arb.passwordmanager.Sign.onActivityResult(Sign.java:774)
at android.app.Activity.dispatchActivityResult(Activity.java:5515)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3429)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3476)
at android.app.ActivityThread.access$1200(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1337)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5317)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
您正在测试的设备或模拟器没有安装与Firebase SDK 11.8.0兼容的Google Play服务版本。在应用程序初始化时，logcat将包含以下消息：
W/GooglePlayServicesUtil: Google Play services out of date
如果真实设备上发生错误，您需要更新设备上的Google Play服务。如果模拟器上发生错误，您需要使用SDK管理器下载最新的模拟器图像，然后选择包含Google API的图像。
由于Firebase需要Google Play服务，因此最好按照GoogleApiAvailability中的说明使用the documentation确认其可用。