How to Remove Unnecessary Margins from Toolbar

how to remove unnecessary margins from toolbar

I figured it out this is happening because of elevation to AppBarLayout
I set it to zero and its working.

<android.support.design.widget.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@null"
        app:elevation="0dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

Unwanted Padding/Margin at the beginning of a custom toolbar

You need to add app:contentInsetStart="0dp" to your Toolbar if you want it to be flush with the starting (left in LTR) edge. There's also contentInsetEnd for the other side.

Remove margin from Toolbar

Simply take a look at your container:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.gruber.jakub.personalscheduler.MainActivity">

You got padding all over the place! :

    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"

Those are the margins. Remove them and you are fine. I suggest you start doing some tutorials.

How to remove toolbar margin-bottom?

You can try adding

android:layout_marginBottom="-8dp"

to the toolbar.

Android: remove left margin from actionbar's custom layout

If you are adding the Toolbar via XML, you can simply add XML attributes to remove content insets.

<android.support.v7.widget.Toolbar
    xmlns:app="schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/primaryColor"
    android:contentInsetLeft="0dp"
    android:contentInsetStart="0dp"
    app:contentInsetLeft="0dp"
    app:contentInsetStart="0dp"
    android:contentInsetRight="0dp"
    android:contentInsetEnd="0dp"
    app:contentInsetRight="0dp"
    app:contentInsetEnd="0dp" />

How to remove extra padding on top of toolbar in appbarlayout android

I suggest that try in you Activity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
}

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