问题是,当我在Google授权下运行此代码时,它立即崩溃:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
super.onStart();
// Check if user is signed in (non-null) and update UI accordingly.
FirebaseUser currentUser = mAuth.getCurrentUser();
updateUI(currentUser);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
//mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
} else {
}
}
};
et_email = (EditText) findViewById(R.id.et_email);
et_password = (EditText) findViewById(R.id.et_password);
mDetailTextView = (TextView) findViewById(R.id.mDetailTextView);
mStatusTextView = (TextView) findViewById(R.id.mStatusTextView);
findViewById(R.id.BVoiti).setOnClickListener(this);
findViewById(R.id.change_email).setOnClickListener(this);
findViewById(R.id.change_password).setOnClickListener(this);
findViewById(R.id.btn_vk).setOnClickListener(this);
findViewById(R.id.BReg).setOnClickListener(this);
}
@Override
public void onClick(View v) {
int i = v.getId();
if (i == R.id.btn_google) {
signIn();
}
}
private void signIn() {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleSignInClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
// Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = task.getResult(ApiException.class);
firebaseAuthWithGoogle(account);
} catch (ApiException e) {
// Google Sign In failed, update UI appropriately
Log.w(TAG, "Google sign in failed", e);
// ...
}
}
}
public void signing(String email, String password){
mAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(task.isSuccessful()) {
Toast.makeText(MainActivity.this, "Авторизация успешна", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(MainActivity.this, "Авторизация провалена", Toast.LENGTH_SHORT).show();
}
}
});
}
public void registration (String email, String password){
mAuth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
Toast.makeText(MainActivity.this, "Регистрация успешна, теперь войдите", Toast.LENGTH_SHORT).show();
} else{
Toast.makeText(MainActivity.this, "Регистрация провалена", Toast.LENGTH_SHORT).show();
}
}
});
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
Log.d(TAG, "signInWithCredential:success");
FirebaseUser user = mAuth.getCurrentUser();
updateUI(user);
} else {
// If sign in fails, display a message to the user.
Log.w(TAG, "signInWithCredential:failure", task.getException());
Toast.makeText(MainActivity.this, "Authentication Failed.", Toast.LENGTH_SHORT).show();
updateUI(null);
}
// ...
}
});
}
private void updateUI(FirebaseUser user) {
if (user != null) {
mStatusTextView.setText( user.getEmail());
mDetailTextView.setText( user.getUid());
findViewById(R.id.btn_google).setVisibility(View.GONE);
findViewById(R.id.btn_vk).setVisibility(View.VISIBLE);
} else {
mStatusTextView.setText("Вышел");
mDetailTextView.setText(null);
findViewById(R.id.btn_google).setVisibility(View.VISIBLE);
findViewById(R.id.btn_vk).setVisibility(View.GONE);
}
}
}
但是日志中的错误:
2019-06-22 17:55:42.652 29327-23222 /? E / AudioSource:正在停止收听 呼吁已经关闭的AudioSource 2019-06-22 17:55:43.240 2093-2616 /? E / TouchFilter:setTouchFilter LOG启用参数:0 2019-06-22 17:55:43.554 31234-31234 / com.anntoxa.foodforyou E / AndroidRuntime:致命异常:main 流程:com.anntoxa.foodforyou,PID:31234 java.lang.RuntimeException:无法启动活动ComponentInfo {com.anntoxa.foodforyou / com.anntoxa.foodforyou.MainActivity}: java.lang.NullPointerException:尝试调用虚拟方法'void android.widget.TextView.setText(java.lang.CharSequence)'上的null 对象参考 在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2805) 在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2883) 在android.app.ActivityThread.-wrap11(未知来源:0) 在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1613) 在android.os.Handler.dispatchMessage(Handler.java:106) 在android.os.Looper.loop(Looper.java:164) 在android.app.ActivityThread.main(ActivityThread.java:6523) 在java.lang.reflect.Method.invoke(本机方法) 在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run(RuntimeInit.java:438) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:857) 原因:java.lang.NullPointerException:尝试调用虚拟方法'void android.widget.TextView.setText(java.lang.CharSequence)'上的null 对象参考 在com.anntoxa.foodforyou.MainActivity.updateUI(MainActivity.java:176) 在com.anntoxa.foodforyou.MainActivity.onCreate(MainActivity.java:51) 在android.app.Activity.performCreate(Activity.java:7023) 在android.app.Activity.performCreate(Activity.java:7014) 在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214) 在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2758) 在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2883) 在android.app.ActivityThread.-wrap11(未知来源:0) 在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1613) 在android.os.Handler.dispatchMessage(Handler.java:106) 在android.os.Looper.loop(Looper.java:164) 在android.app.ActivityThread.main(ActivityThread.java:6523) 在java.lang.reflect.Method.invoke(本机方法) 在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run(RuntimeInit.java:438) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:857) 2019-06-22 17:55:43.564 2093-2156 /? E / ActivityManager_tangan:应用 崩溃,杀死它2019-06-22 17:55:43.569 384-384 /?电子/低内存杀手: 写入/ proc / 31234 / oom_score_adj时出错; errno = 22
答案 0 :(得分:0)
您应该移动此方块:
mDetailTextView = (TextView) findViewById(R.id.mDetailTextView);
mStatusTextView = (TextView) findViewById(R.id.mStatusTextView);
在updateUI
中调用onCreate
之前