所以，事情是我按照Firebase设置中的所有步骤操作，但控件没有按照我的createUserWithEmailAndPassword()方法移动。屏幕刚冻结，除了progressBar进入圈子外没有任何其他事情发生。
这是我的gradle build.app文件：
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
buildToolsVersion '26.0.2'
defaultConfig {
applicationId "com.example.parma.gareebcalculator"
minSdkVersion 23
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation 'com.google.firebase:firebase-auth:11.0.4'
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:support-v4:26.1.0'
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'
这是我的代码： -
public class RegsiterPage extends AppCompatActivity implements View.OnClickListener{
private EditText userName;
private EditText email;
private EditText password;
private EditText repassword;
private Button signUp;
private ProgressBar progressBar;
private FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_regsiter_page);
userName = (EditText) findViewById(R.id.usernameid);
email = (EditText) findViewById(R.id.emailid);
password = (EditText) findViewById(R.id.passwordid);
repassword = (EditText) findViewById(R.id.repasswordid);
signUp = (Button) findViewById(R.id.signupid);
progressBar = (ProgressBar) findViewById(R.id.progressBarid);
// Used to intialize the firebase object and register the user on the server:-
mAuth = FirebaseAuth.getInstance();
signUp.setOnClickListener(this);
}
//Email constraints:-
//To check whether the entered email is of correct format:
private boolean isValidEmail(String email)
{
if(!Patterns.EMAIL_ADDRESS.matcher(email).matches())
{
return false;
}
return true;
}
//Username constraints:-
//To check whether the given username only contains letters or digits:
private boolean userNameCheck(String name){
if(Character.isDigit(name.charAt(0))){
return false;
}
for(int i=0;i<name.length();i++){
if(!Character.isLetterOrDigit(name.charAt(i))){
return false;
}
}
return true;
}
private boolean checkUserNameLength(String name){
if(name.length()<8){
return false;
}
return true;
}
//Password constraints:-
//To see whethter the password contains any special characters or not:
private boolean checkSpecial(String pass){
byte[] bytes = pass.getBytes();
for(byte temp:bytes){
if(temp>=33 && temp<=47){
return false;
}
}
return true;
}
//To see whethter the password is containing both alphabets and numbers:
private boolean checkPassword(String pass){
if(pass.length()<8){
return false;
}
for(int i=0;i<pass.length();i++){
if(!Character.isLetterOrDigit((pass.charAt(i)))){
return false;
}
}
return true;
}
private void onSignUp(){
final String usernameString = userName.getText().toString().trim();
final String emailString = email.getText().toString().trim();
final String passwordString = password.getText().toString().trim();
final String repasswordString = repassword.getText().toString().trim();
/**If any of the either fields login or password are empty then the following couple actions might take place:-
* Also if the passwords mismatch then the user will be denied a successfull registeration*/
if(TextUtils.isEmpty(usernameString)){
userName.setError("Please enter Username");
userName.requestFocus();
return;
}
if(TextUtils.isEmpty(emailString)){
email.setError("Please enter Email Id");
email.requestFocus();
return;
}
if(TextUtils.isEmpty(passwordString)){
password.setError("Please enter Password");
password.requestFocus();
return;
}if(TextUtils.isEmpty(repasswordString)){
repassword.setError("Please Re-enter Password");
repassword.requestFocus();
return;
}
if(!userNameCheck(usernameString)){
userName.setError("Username can contain only alphabets or digits.Username cannot start with a number");
userName.setText("");
userName.requestFocus();
return;
}
if(!checkUserNameLength(usernameString)){
userName.setError("The username should atleast contain 8 charchacters");
userName.setText("");
userName.requestFocus();
return;
}
if (userName.getText().toString().contains(" ")) {
userName.setError("Spaces NOT Allowed");
userName.requestFocus();
return;
}
if(!isValidEmail(emailString)){
email.setError("Incorrect Email format");
email.requestFocus();
return;
}
if (!repasswordString.equals(passwordString)){
//Toast.makeText(this,"Password Mismatch.Try Again",Toast.LENGTH_SHORT).show();
password.setGravity(10);
password.setError("Passwords are incorrect");
password.setText("");
repassword.setText("");
password.requestFocus();
return;
}
if(!checkPassword(passwordString)){
password.setError("The password should be alphanumeric and should be 8 characters long.No special symbols allowed");
password.setText("");
repassword.setText("");
password.requestFocus();
return;
}
if(!checkSpecial(passwordString)){
password.setError("The password should not contain any special characters");
password.setText("");
repassword.setText("");
password.requestFocus();
return;
}
//If all, username,email,password and repassword have been entered then the following part takes place
progressBar.setVisibility(View.VISIBLE);
/*Here the user is created using a password and email and addonCompleteListener is optional part which states what to be
done when the user has successfully logged in*/
mAuth.createUserWithEmailAndPassword(emailString,passwordString).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
progressBar.setVisibility(View.GONE);
if(task.isSuccessful()){
Toast.makeText(RegsiterPage.this,"Registered Successfully.",Toast.LENGTH_SHORT).show();
//To record the username in a the android application:
/*FirebaseUser user = mAuth.getCurrentUser();
if(user!=null){
UserProfileChangeRequest profile = new UserProfileChangeRequest.Builder()
.setDisplayName(usernameString)
.build();
user.updateProfile(profile).addOnCompleteListener( new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if(task.isSuccessful()){
Toast.makeText(RegsiterPage.this,"Awesome Profile Created",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(RegsiterPage.this,task.getException().getMessage(),Toast.LENGTH_SHORT).show();
}
}
});
}*/
Intent intent = new Intent(getApplicationContext(),LoginPage.class);
startActivity(intent);
}
else if(task.getException() instanceof FirebaseAuthUserCollisionException) {
Toast.makeText(RegsiterPage.this,"You are already Registered",Toast.LENGTH_SHORT).show();
userName.setText("");
email.setText("");
password.setText("");
repassword.setText("");
}else{
Toast.makeText(RegsiterPage.this,task.getException().getMessage(),Toast.LENGTH_SHORT).show();
userName.setText("");
email.setText("");
password.setText("");
repassword.setText("");
}
}
});
}
@Override
public void onClick(View v) {
if(v == signUp){
onSignUp();
}
}
}
编辑： -
这是我的logcat： -
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.parma.gareebcalculator, PID: 3149
java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.tasks.Task
com.google.android.gms.common.api.GoogleApi.zzb(com.google.android.gms.common.api.internal.zzdd)' on a null object reference
at com.google.android.gms.internal.zzdvv.zzb(Unknown Source)
at com.google.android.gms.internal.zzdwc.zza(Unknown Source)
at com.google.firebase.auth.FirebaseAuth.createUserWithEmailAndPassword(Unknown
Source)
at com.example.parma.gareebcalculator.RegsiterPage.onsignup(RegsiterPage.java:192)
at com.example.parma.gareebcalculator.RegsiterPage.onClick(RegsiterPage.java:241)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22265)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
找到解决方案
解决方案：如果有人来这个......就这样做......我的整个代码和一切都很完美......但是我的模拟器出了什么问题......它正在运行在API 24上...这实际上是无法追踪的，因为应用程序只兑现但从未说过如何....所以只需尝试将API更改为26（为我工作）并使用或创建新的模拟器
答案 0 :(得分：0)
你的真实是空的，这就是造成这次崩溃的原因
保持检查
if(mAuth !=null){
}