【发布时间】：2019-02-28 16:56:26
【问题描述】：
我有一个 Android 应用，现在有大约 2k 活跃用户。它使用 Firebase Firestore 数据库来保存用户数据和其他内容。但是最近我从我的 readUserDataFromDatabase 函数中得到了这个错误和崩溃报告：
private void readUserDataFromDatabase(String uid) {
db.collection(Constants.PARAM_USERS)
.document(uid) // (MainActivity.java:215)This is where the crash happens
.get()
.addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
@Override
public void onSuccess(DocumentSnapshot documentSnapshot) {
UserData userData = documentSnapshot.toObject(UserData.class);
if (userData == null)
return;
tvName.setText(getString(R.string.welcome, userData.getName()));
Picasso
.get()
.load(userData.getPhotoUrl())
.placeholder(getResources().getDrawable(R.drawable.place_holder))
.transform(new RoundedCornersTransform())
.into(ivPhoto);
UserData.getInstance().setCredit(userData.getCredit());
UserData.getInstance().setPhotoUrl(userData.getPhotoUrl());
UserData.getInstance().setName(userData.getName());
if (userData.getInstanceId() != null) {
UserData.getInstance().setInstanceId(userData.getInstanceId());
}
}
});
}
此函数在登录活动重定向成功后运行：
private void setUser(final FirebaseUser user) {
if (user == null)
return;
UserData.getInstance().setUserId(user.getUid());// I'm using this Uid for create node for user.
DocumentReference docRef = db.collection(Constants.PARAM_USERS).document(user.getUid());
docRef
.get()
.addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
@Override
public void onSuccess(DocumentSnapshot documentSnapshot) {
UserData userData = documentSnapshot.toObject(UserData.class);
if (userData == null) {
createUser(user);
} else {
redirectToHome(); //login succeed
}
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
}
});
}
并从重定向的活动中调用 readUserDataFromDatabase 函数：
readUserDataFromDatabase(UserData.getInstance().getUserId());
崩溃率在 %1 左右，但我仍然看不到这里缺少什么。 firebase 用户 id 是否有可能返回 null 或登录成功后，readUserDataFromDatabase 在
之前运行UserData.getInstance().setUserId(user.getUid());
功能？我不知道。谢谢。
编辑 1： 添加了堆栈跟踪。
致命异常：java.lang.RuntimeException：无法启动活动 组件信息{com.alialacan.kpss/com.alialacan.kpss.MainActivity}： java.lang.NullPointerException：提供的文档路径不能是 空值。 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2781) 在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2859) 在 android.app.ActivityThread.-wrap11（未知来源） 在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1592) 在 android.os.Handler.dispatchMessage(Handler.java:106) 在 android.os.Looper.loop(Looper.java:164) 在 android.app.ActivityThread.main(ActivityThread.java:6518) 在 java.lang.reflect.Method.invoke(Method.java) 在 com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by java.lang.NullPointerException: Provided document path must not be null. at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:228) at com.google.firebase.firestore.CollectionReference.document(SourceFile:90) at com.alialacan.kpss.MainActivity.readUserDataFromDatabase(MainActivity.java:215) at com.alialacan.kpss.MainActivity.onCreate(MainActivity.java:114) at android.app.Activity.performCreate(Activity.java:7013) at android.app.Activity.performCreate(Activity.java:7004) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2734) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2859) at android.app.ActivityThread.-wrap11(Unknown Source) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1592) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6518) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
编辑 2： setUser 函数在哪里调用：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
if (requestCode == Constants.RC_SIGN_IN) {
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
if (result.isSuccess()) {
GoogleSignInAccount account = result.getSignInAccount();
firebaseAuthWithGoogle(account);
} else {
Toast.makeText(LoginActivity.this, R.string.error_google_login,
Toast.LENGTH_SHORT).show();
hideProgress();
}
}
}
private void handleFacebookAccessToken(AccessToken token) {
Log.d("", "handleFacebookAccessToken:" + token);
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
auth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Log.d("", "signInWithCredential:success");
user = auth.getCurrentUser();
setUser(user);
} else {
setUser(null);
Log.w("", "signInWithCredential:failure", task.getException());
Toast.makeText(LoginActivity.this, R.string.error_email_already_exist,
Toast.LENGTH_SHORT).show();
hideProgress();
}
}
});
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
auth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
FirebaseUser user = auth.getCurrentUser();
setUser(user);
} else {
Toast.makeText(LoginActivity.this, R.string.error_google_login,
Toast.LENGTH_SHORT).show();
setUser(null);
hideProgress();
}
}
});
}
【问题讨论】：
-
请使用崩溃的详细信息编辑问题。有堆栈跟踪吗？
-
您好，已使用堆栈跟踪进行编辑。
标签： java android firebase firebase-authentication google-cloud-firestore