Android – “Back button” using getSupportActionbar and appcompat v7 toolbar

androidandroid-appcompatandroid-toolbar

I'm using the new toolbar from the Appcompat V7 library and I'm making an application with navigation drawer and with fragments.

In some fragments I don't want to show the hamburger icon but the arrow instead… That is fine I did this in this way:

mDrawerToggle.setDrawerIndicatorEnabled(false);

mDrawerToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);

getSupportActionBar().setHomeAsUpIndicator(R.drawable.abc_ic_ab_back_mtrl_am_alpha);

My question is that: How or where i need to set up the home button lisener or what i need to listen for the "back" button ?
I want to call the main backpressed method and to set back the navigation drawer icon with the hamburger icon..

Best Answer

Add this method in onCreate():

getSupportActionBar().setDisplayHomeAsUpEnabled(true);

Then override the onOptionItemSelected() as below:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            onBackPressed();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

Related Solutions

Android – Cannot catch toolbar home button click event

If you want to know when home is clicked is an AppCompatActivity then you should try it like this:

First tell Android you want to use your Toolbar as your ActionBar:

setSupportActionBar(toolbar);

Then set Home to be displayed via setDisplayShowHomeEnabled like this:

getSupportActionBar().setDisplayShowHomeEnabled(true);

Finally listen for click events on android.R.id.home like usual:

@Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
    if (menuItem.getItemId() == android.R.id.home) {
        Timber.d("Home pressed");
    }
    return super.onOptionsItemSelected(menuItem);
}

If you want to know when the navigation button is clicked on a Toolbar in a class other than AppCompatActivity you can use these methods to set a navigation icon and listen for click events on it. The navigation icon will appear on the left side of your Toolbar where the the "home" button used to be.

toolbar.setNavigationIcon(getResources().getDrawable(R.drawable.ic_nav_back));
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Log.d("cek", "home selected");
    }
});

If you want to know when the hamburger is clicked and when the drawer opens, you're already listening for these events via onDrawerOpened and onDrawerClosed so you'll want to see if those callbacks fit your requirements.

Android – AppCompat v7 Toolbar onOptionsItemSelected not called

I know this question has been answered but I found the real cause of the problem after 2 days of frustration.

Take a look at the ActionBarDrawerToggle documentation: https://developer.android.com/reference/android/support/v7/app/ActionBarDrawerToggle.html

Notice the two constructors there. My mistake was that I was using the second constructor that was taking a toolbar as a parameter. It took me so long to notice the last line in the consturctor documentation: "Please use ActionBarDrawerToggle(Activity, DrawerLayout, int, int) if you are setting the Toolbar as the ActionBar of your activity."

After using the first constructor onOptionsItemSelected() was called with no issues.

Don't forget to call the ActionBarDrawerToggle.onConfigurationChanged() and onOptionsItemSelected() from your activity as described in the last part here: http://developer.android.com/training/implementing-navigation/nav-drawer.html

Best Answer

Related Solutions

Android – Cannot catch toolbar home button click event

Android – AppCompat v7 Toolbar onOptionsItemSelected not called

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