嗨，我是编码新手，我正在开发社交媒体应用，
当我保存自己的设置活动时，它显示成功，而在Firebase数据库上，它显示该用户已注册，但在设置活动后立即发送回主活动。 在Logcat中它说： 无法启动活动ComponentInfo {aj_studio.bfit / aj_studio.bfit.loginActivity}：android.view.InflateException：二进制XML文件第2行：二进制XML文件第2行：膨胀类错误
主要活动：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar= findViewById(R.id.main_page_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("Home");
mAuth= FirebaseAuth.getInstance();
currentuserid= mAuth.getCurrentUser().getUid();
userref=FirebaseDatabase.getInstance().getReference().child("user");
drawerlayout = (DrawerLayout)findViewById(R.id.drawer_layout);
ActionBarDrawerToggle = new ActionBarDrawerToggle(MainActivity.this, drawerlayout,R.string.open,R.string.closer);
drawerlayout.addDrawerListener(ActionBarDrawerToggle);
ActionBarDrawerToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
navigationview=(NavigationView)findViewById(R.id.navigation);
View nav =navigationview.inflateHeaderView(R.layout.navigation_header);
navigationview.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
useMenueSelectorItem(item);
return false;
}
});
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser =mAuth.getCurrentUser();
if (currentUser== null){
SendUserToLoginActivity();
}
else {
checkforuserexistance();
}
}
private void checkforuserexistance() {
final String current_user_id;
current_user_id = mAuth.getCurrentUser().getUid();
userref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if(!dataSnapshot.hasChild(current_user_id))
{
sendusertosetupactivity();
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void SendUserToLoginActivity() {
Intent loginintent = new Intent(MainActivity.this,loginActivity.class);
loginintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK |Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(loginintent);
finish();
}
private void sendusertosetupactivity() {
Intent send_user_to_setup_activity = new Intent(MainActivity.this,setupActivity.class);
send_user_to_setup_activity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(send_user_to_setup_activity);
finish();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(ActionBarDrawerToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
private void useMenueSelectorItem(MenuItem item) {
switch (item.getItemId()) {
case R.id.navProfile:
Toast.makeText(this, "profile", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_exercises:
Toast.makeText(this, "exercises", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_findfriend:
Toast.makeText(this, "find friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_friends:
Toast.makeText(this, "friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_Home:
Toast.makeText(this, "home", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_logout:
mAuth.signOut();
SendUserToLoginActivity();
break;
case R.id.nav_messages:
Toast.makeText(this, "messages", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_nutrition:
Toast.makeText(this, "nutrition", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_settings:
Toast.makeText(this, "settings", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_Tips:
Toast.makeText(this, "trips", Toast.LENGTH_SHORT).show();
break;
}
}}
启动活动：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_setup);
username = findViewById(R.id.setup_username);
fullname = findViewById(R.id.setup_fullname);
goal = findViewById(R.id.setup_goal);
saveaccountsetupinformation = findViewById(R.id.setup_save);
profileimage= findViewById(R.id.profile_image);
Loadingprogessbar = new ProgressDialog(this);
mAuth= FirebaseAuth.getInstance();
current_User_ID = mAuth.getCurrentUser().getUid();
useRef = FirebaseDatabase.getInstance().getReference().child("Users").child(current_User_ID);
saveaccountsetupinformation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
savingandprocessingaccountinformation();
}
});
}
private void savingandprocessingaccountinformation() {
String username_1 = username.getText().toString();
String fullname_1 = fullname.getText().toString();
String goal_1 = goal.getText().toString();
if (TextUtils.isEmpty(username_1))
{
Toast.makeText(this,"please enter username",Toast.LENGTH_SHORT).show();
}
if (TextUtils.isEmpty(fullname_1))
{
Toast.makeText(this,"please enter full name",Toast.LENGTH_SHORT).show();
}
if (TextUtils.isEmpty(goal_1))
{
Toast.makeText(this,"please enter goal",Toast.LENGTH_SHORT).show();
}
else{
Loadingprogessbar.setTitle("Saving Information");
Loadingprogessbar.setMessage("Please wait while your account is being processed");
Loadingprogessbar.show();
Loadingprogessbar.setCanceledOnTouchOutside(true);
HashMap UserMap = new HashMap();
UserMap.put("username",username_1);
UserMap.put("fullname",fullname_1);
UserMap.put("goal",goal_1);
UserMap.put("Status","Get fit ..live fit... Bfit");
UserMap.put("gender","none");
UserMap.put("Dob","none");
useRef.updateChildren(UserMap).addOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(@NonNull Task task) {
SendUserToMainActivity();
if(task.isSuccessful())
{
Toast.makeText(setupActivity.this,"your account was successfully setup",Toast.LENGTH_LONG).show();
Loadingprogessbar.dismiss();
}
else
{
String message = task.getException().getMessage();
Toast.makeText(setupActivity.this,"error occurred: "+message,Toast.LENGTH_LONG).show();
Loadingprogessbar.dismiss();
}
}
});
}
}
private void SendUserToMainActivity()
{
Intent mainIntent = new Intent(setupActivity.this, MainActivity.class);
mainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(mainIntent);
finish();
the manifest
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<application
android:allowBackup="true"
android:hardwareAccelerated="false"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:largeHeap="true"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".loginActivity" />
<activity android:name=".RegisterActivity" />
<activity android:name=".setupActivity"></activity>
</application>
</manifest>
登录活动
import android.app.ProgressDialog;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
public class loginActivity extends AppCompatActivity {
private Button loginbutton;
private EditText useremail,userpassword;
private TextView NeedNewAccountLink;
private ProgressDialog Loadingprogessbar;
private FirebaseAuth mAuth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
mAuth = FirebaseAuth.getInstance();
loginbutton = findViewById(R.id.login_create_account);
useremail=(EditText) findViewById(R.id.login_email);
userpassword =(EditText) findViewById(R.id.login_password);
NeedNewAccountLink=findViewById(R.id.click_to_register);
Loadingprogessbar = new ProgressDialog(this);
NeedNewAccountLink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendusertoregisteractivity();
}
});
loginbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
allowingusertoenteraccount();
}
});
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser =mAuth.getCurrentUser();
if (currentUser != null){
SendUserTomainActivity();
}
}
private void SendUserTomainActivity() {
Intent sendusertomainactivity = new Intent(loginActivity.this,MainActivity.class);
sendusertomainactivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(sendusertomainactivity);
finish();
}
private void allowingusertoenteraccount() {
String email = useremail.getText().toString();
String password = userpassword.getText().toString();
if (TextUtils.isEmpty(email)){
Toast.makeText(this,"please input your email",Toast.LENGTH_SHORT).show();
}
else if (TextUtils.isEmpty(password)){
Toast.makeText(this,"please input your password",Toast.LENGTH_SHORT).show();
}
else{
Loadingprogessbar.setTitle("Login");
Loadingprogessbar.setMessage("Please wait, while we are accessing your account...");
Loadingprogessbar.setCanceledOnTouchOutside(true);
Loadingprogessbar.show();
mAuth.signInWithEmailAndPassword(email,password)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()){
sendusertomainactivity();
Toast.makeText(loginActivity.this,"welcome to BFit",Toast.LENGTH_SHORT).show();
Loadingprogessbar.dismiss();
}
else{
String message = task.getException().getMessage();
Toast.makeText(loginActivity.this,"Error Occurred: "+message,Toast.LENGTH_SHORT).show();
Loadingprogessbar.dismiss();
}
}
});
}
}
private void sendusertomainactivity() {
Intent sendusertomainactivity =new Intent(loginActivity.this,MainActivity.class);
sendusertomainactivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK |Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(sendusertomainactivity);
finish();
}
private void sendusertoregisteractivity() {
Intent registerintent = new Intent(loginActivity.this,RegisterActivity.class);
registerintent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(registerintent);
finish();
}
}