I have a toolbar in my activity ( import android.support.v7.widget.Toolbar;
) and I'm trying to provide Up navigation using its home button. What I have:
Manifest:
<!-- ... -->
<activity android:name=".SettingsActivity"
android:label="@string/settings"
android:parentActivityName=".MainActivity"/>
<!-- ... -->
view_toolbar.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp">
</android.support.v7.widget.Toolbar>
activity_settings.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Toolbar -->
<include
layout="@layout/view_toolbar" />
<!-- ... -->
my onCreate method:
super.onCreate(bundle)
setContentView(R.layout.activity_settings);
// Set the toolbar
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
So far I shouldn't have an up button and I don't. So we're fine. But when I tried to add it, I couldn't.
First I tried this:
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Didn't work. Then I tried this (as shown here ):
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(ToolbarActivity.this, "Up clicked",
Toast.LENGTH_SHORT).show();
NavUtils.navigateUpFromSameTask(ToolbarActivity.this);
}
});
I even tried a workaround I saw somewhere, involving creating a dummy menu and trying to get the event from onOptionsItemSelected
(which is never called by the way).
What can I do? What is the correct way to provide Up navigation through toolbar?
Did you have the below code to set your toolbar as the default activity actionbar?
setSupportActionBar(toolbar);
You did not set an image icon to the home button, maybe it shows up, but you just can't see it.
getSupportActionBar().setHomeAsUpIndicator(iconDrawable);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
and as @Gonzalo said, you also have to override the menu select event to handle the home button onClick event
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
//handle the home button onClick event here.
return true;
case android.R.id.other_menu
return true
}
return super.onOptionsItemSelected(item);
}
and why didn't you have a appbarlayout to contain the toolbar?
<android.support.design.widget.AppBarLayout
android:id="@+id/baseAppbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/baseToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
More actionbar implement details please have a look at my github project, hope it can help:
1- set your toolbar
Toolbar toolbar = findViewById(R.id.toolbar);
2- setup your icon
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
3- override this method
@Override
public boolean onSupportNavigateUp() {
onBackPressed();
return true;
}
You can do it like this.
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle(R.string.title);
toolbar.setNavigationIcon(R.mipmap.back); // just setNavigationIcon
setSupportActionBar(toolbar);
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the toorbar's NavigationIcon as up/home button
case android.R.id.home:
//NavigationIcon
return true;
}
return super.onOptionsItemSelected(item);
}
I found a simple way. Which works perfectly according to expectation.
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_id);
toolbar.setTitleTextColor(Color.WHITE);
toolbar.setTitle(getResources().getString(R.string.your_title));
toolbar.setNavigationIcon(R.mipmap.back_btn);
setSupportActionBar(toolbar);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed(); // byDefault provided backPressed method, or handle your own way
}
});
As far as I know the back button of the toolbar is treated as a menu item, so as you say you should override the onOptionsItemSelected
.
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
//Home/back button
return true;
}
return super.onOptionsItemSelected(item);
}
I too had this kind of issue earlier. I suspect there is something going on with include
. Try to add an id
to the toolbar included layout like
<include
layout="@layout/view_toolbar"
id = "@+id/incl_toobar"/>
And now try to get the toolbar using incl_toolbar
.
Toolbar toolbar = (Toolbar) findViewById(R.id.incl_toolbar);
Hope this helps.
Regards,
Sree
It's very simple. Just do the following steps:
activity_child.xml
: (In my project, this AppBarLayout
is placed inside a ConstraintLayout
)
<android.support.design.widget.AppBarLayout
android:id="@+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
...
ChildActivity.java
public class ChildActivity extends AppCompatActivity
{
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_child);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_arrow_back_black_24dp);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
...
}
parentActivityName
property in AndroidManifest.xml
<activity android:name=".ChildActivity"
android:theme="@style/AppTheme.NoActionBar"
android:parentActivityName=".ParentActivity"/>
Important
For this to work properly, do not call finish()
in the parent activity after you call startActivity(intent)
.
One can select by ID home
, when binding the event with ViewDataBinding
:
this.getDataBinding().toolbarProducts.home.setOnClickListener(view -> {
NavController controller = Navigation.findNavController(getDataBinding().getRoot());
controller.navigateUp();
});
Nothing else worked for me inside a Fragment
.
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