Android Toolbar - Change height and width of Navigation Icon Programmatically

Question

I want to change height and width of Navigation Icon(in black circle in screen shot) in Android Toolbar programmatically. Is there any way to do so. This is not toolbar logo. I can't update toolbar theme in Styles xml as I want it to be dynamic. Please help.

Answer 1

I did this way :

toolbar= (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
if(getSupportActionBar()!=null){
    Drawable drawable= getResources().getDrawable(R.drawable.ic_sync_white_36dp);
    Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
    Drawable newdrawable = new BitmapDrawable(getResources(), Bitmap.createScaledBitmap(bitmap, 250, 250, true));
    newdrawable.setColorFilter(Color.BLUE, PorterDuff.Mode.SRC_ATOP);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeAsUpIndicator(newdrawable);

}

You can use calculate-dp-from-pixels-in-android-programmatically and converting-pixels-to-dp when creating scaled bitmap .

My Toolbar:

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

And screenshot :

Also another way is using custom layout in Toolbar like that:

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" >
    <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="horizontal" android:layout_width="match_parent"
        android:background="@color/colorPrimary"
        android:id="@+id/custom_toolbar_layout"
        android:layout_height="wrap_content">

    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:tint="@android:color/holo_purple"
        android:id="@+id/imageView"
        android:gravity="center_vertical"
        android:src="@drawable/ic_clear_black_36dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:text="My Custom Toolbar"
        android:gravity="center_vertical"
        android:textSize="20sp"
        android:textColor="@android:color/white"
        android:layout_gravity="center_horizontal" />
    </LinearLayout>
</android.support.v7.widget.Toolbar>

If you want to access any View in Toolbar see @Aleksandar Stefanović's answer. And you can take a look at Material design guidelines for creating custom Toolbar

Then screenshot :

Icons from : Material Icons