底部导航栏按钮作为注销 google firebase
Bottom navigation bar Button as Signout google firebase
我想使用底部导航栏按钮退出 google Firebase 身份验证。我已经有了按钮,我正在使用该按钮作为退出按钮,但现在我想使用底部导航栏按钮作为退出按钮。意图不能直接工作,请帮助我如何做
public class second extends AppCompatActivity {
private Button mlogout;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
//bottom nav
BottomNavigationView bottomNavigationView=(BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.action_profile:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
case R.id.action_home:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
case R.id.action_add:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
//bottom nav
mAuth=FirebaseAuth.getInstance();
mAuthListener =new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser()==null){
startActivity(new Intent(second.this,MainActivity.class));
}
}
};
mlogout=(Button) findViewById(R.id.logout);
mlogout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mAuth.signOut();
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
}
并且 xml 文件是
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimaryDark"
android:id="@+id/drawerLayout"
tools:context="com.food.sheenishere.stark.second">
<Button
android:id="@+id/logout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="log out"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="122dp"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp" />
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_navigation"
android:layout_width="368dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="8dp"
android:visibility="visible"
app:itemBackground="@color/colorPrimary"
app:itemIconTint="@drawable/nav_item_color_state"
app:itemTextColor="@drawable/nav_item_color_state"
app:layout_constraintBottom_toBottomOf="parent"
app:menu="@menu/bottom_navigation_main"
tools:layout_editor_absoluteX="8dp" />
</android.support.constraint.ConstraintLayout>
1. 在您的 bottom_navigation_main
菜单中,只需为 LogOut
选项添加一个 Item
。
bottom_navigation_main.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_profile" />
<item
android:id="@+id/action_home" />
<item
android:id="@+id/action_add" />
<item
android:id="@+id/action_logout"
android:title="Log Out"
android:icon="@drawable/ic_logout"
app:showAsAction="always"/>
</menu>
2. 在你的 second
activity 的 onNavigationItemSelected()
方法中,检查是否选择了项目 R.id.action_logout
.如果选中,则调用注销方法 mAuth.signOut()
。更新您的 onCreate()
方法如下:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
// Firebase
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser()==null){
startActivity(new Intent(second.this,MainActivity.class));
}
}
};
// Bottom Navigation
BottomNavigationView bottomNavigationView=(BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.action_profile:
Toast.makeText(second.this, "Profile", Toast.LENGTH_SHORT).show();
break;
case R.id.action_home:
Toast.makeText(second.this, "Home", Toast.LENGTH_SHORT).show();
break;
case R.id.action_add:
Toast.makeText(second.this, "Add", Toast.LENGTH_SHORT).show();
break;
case R.id.action_logout:
Toast.makeText(second.this, "Log Out", Toast.LENGTH_SHORT).show();
// LogOut
mAuth.signOut();
break;
}
return true;
}
});
}
希望对您有所帮助!
我想使用底部导航栏按钮退出 google Firebase 身份验证。我已经有了按钮,我正在使用该按钮作为退出按钮,但现在我想使用底部导航栏按钮作为退出按钮。意图不能直接工作,请帮助我如何做
public class second extends AppCompatActivity {
private Button mlogout;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
//bottom nav
BottomNavigationView bottomNavigationView=(BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.action_profile:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
case R.id.action_home:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
case R.id.action_add:
Toast.makeText(second.this,"hello how are u",Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
//bottom nav
mAuth=FirebaseAuth.getInstance();
mAuthListener =new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser()==null){
startActivity(new Intent(second.this,MainActivity.class));
}
}
};
mlogout=(Button) findViewById(R.id.logout);
mlogout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mAuth.signOut();
}
});
}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
}
并且 xml 文件是
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimaryDark"
android:id="@+id/drawerLayout"
tools:context="com.food.sheenishere.stark.second">
<Button
android:id="@+id/logout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="log out"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="122dp"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp" />
<android.support.design.widget.BottomNavigationView
android:id="@+id/bottom_navigation"
android:layout_width="368dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="8dp"
android:visibility="visible"
app:itemBackground="@color/colorPrimary"
app:itemIconTint="@drawable/nav_item_color_state"
app:itemTextColor="@drawable/nav_item_color_state"
app:layout_constraintBottom_toBottomOf="parent"
app:menu="@menu/bottom_navigation_main"
tools:layout_editor_absoluteX="8dp" />
</android.support.constraint.ConstraintLayout>
1. 在您的 bottom_navigation_main
菜单中,只需为 LogOut
选项添加一个 Item
。
bottom_navigation_main.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_profile" />
<item
android:id="@+id/action_home" />
<item
android:id="@+id/action_add" />
<item
android:id="@+id/action_logout"
android:title="Log Out"
android:icon="@drawable/ic_logout"
app:showAsAction="always"/>
</menu>
2. 在你的 second
activity 的 onNavigationItemSelected()
方法中,检查是否选择了项目 R.id.action_logout
.如果选中,则调用注销方法 mAuth.signOut()
。更新您的 onCreate()
方法如下:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
// Firebase
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser()==null){
startActivity(new Intent(second.this,MainActivity.class));
}
}
};
// Bottom Navigation
BottomNavigationView bottomNavigationView=(BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.action_profile:
Toast.makeText(second.this, "Profile", Toast.LENGTH_SHORT).show();
break;
case R.id.action_home:
Toast.makeText(second.this, "Home", Toast.LENGTH_SHORT).show();
break;
case R.id.action_add:
Toast.makeText(second.this, "Add", Toast.LENGTH_SHORT).show();
break;
case R.id.action_logout:
Toast.makeText(second.this, "Log Out", Toast.LENGTH_SHORT).show();
// LogOut
mAuth.signOut();
break;
}
return true;
}
});
}
希望对您有所帮助!