【发布时间】：2016-09-26 16:51:31
【问题描述】：
我正在创建一个 Android 应用程序，目前正在尝试使用 Firebase 实现用户身份验证。据我所知，我的应用已连接到我的 Firebase 服务器。
我在尝试通过按下按钮从 SignIn 活动切换到 SignUp 活动时遇到运行时错误。应用程序崩溃，我遇到了运行时错误。
据我所知，运行时错误来自 SignUp 活动的 onCreate() 调用，当时我尝试使用 FirebaseAuth.getInstance() 初始化 FirebaseAuth 对象。由于
java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process seniordesign.phoneafriend. Make sure to call FirebaseApp.initializeApp(Context).
但是，我在我的 Application 类的 onCreate() 方法中进行了这个调用，我认为这很好。我将initalizeApp() 调用添加到SignUp 的onCreate() 调用中，但没有骰子。我已经寻找其他有这个问题的人，但没有找到类似的东西。感谢您的帮助。
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="seniordesign.phoneafriend">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
android:name="seniordesign.phoneafriend.PhoneAFriend">
<activity android:name=".SignIn">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SignUp"></activity>
</application>
</manifest>
PhoneAFriend.java（我的应用程序类）
public class PhoneAFriend extends Application {
public void onCreate(){
super.onCreate();
Firebase.setAndroidContext(this);
FirebaseApp.initializeApp(this);
}
}
SignUp.java
public class SignUp extends AppCompatActivity {
protected Firebase ref;
protected EditText emailText;
protected EditText passText;
protected EditText confirmText;
protected Button button;
protected SignUp thisContext;
protected FirebaseAuth auth;
protected FirebaseAuth.AuthStateListener authListener;
private View.OnClickListener onClickListener;
public static Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signup);
ref = new Firebase("https://phoneafriend-7fb6b.firebaseio.com");
emailText = (EditText) findViewById(R.id.signup_emailText);
passText = (EditText) findViewById(R.id.signup_passwordText);
confirmText = (EditText) findViewById(R.id.signup_passwordConfirm);
intent = new Intent(this, SignIn.class);
//Tried this already
//FirebaseApp.initializeApp(this);
auth = FirebaseAuth.getInstance();
button = (Button) findViewById(R.id.signup_button);
onClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
createUser(view);
Log.v("SignUp Button" , "Clicked; Attempting to create user");
}
};
button.setOnClickListener(onClickListener);
authListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged( FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
Log.d("FirebaseAuth", "onAuthStateChanged:signed_in:" + user.getUid());
} else {
// User is signed out
Log.d("FirebaseAuth", "onAuthStateChanged:signed_out");
}
// ...
}
};
thisContext = this;
}
@Override
public void onStart(){
super.onStart();
//auth.addAuthStateListener(authListener);
}
@Override
public void onStop(){
super.onStop();
if(authListener != null) {
//auth.removeAuthStateListener(authListener);
}
}
protected void createUser(View view){
String cString = null;
String pString = null;
String eString = emailText.getText().toString();
if(passText.getText() != null && confirmText.getText() != null) {
pString = passText.getText().toString();
cString = confirmText.getText().toString();
Log.v("SignUP: Pass Null check" , "Pass" );
if (emailText.getText() != null && pString.equals(cString) && passText.getText() != null) {
Log.v("SignUP: Sign up check " , "Pass");
auth.createUserWithEmailAndPassword(emailText.getText().toString() , passText.getText().toString())
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.v("createUser complete" , "status: " + task.isSuccessful());
if(task.isSuccessful()){
startActivity(SignUp.intent);
}
}
});
}
}
return;
}
}
【问题讨论】：
-
您正在混合来自旧版 2.x.x 的 API 调用。 SDK 与新的 9.x.x SDK，它们不兼容。您应该只使用新的 SDK。请参阅此相关答案：stackoverflow.com/a/39321686/4815718