Btukfyl

I get this warning on my layout in Android Studio:

Nested weights are bad for performance less...
Layout weights require
a widget to be measured twice. When a LinearLayout with non-zero
weights is nested inside another LinearLayout with non-zero weights,
then the number of measurements increase exponentially.
Issue id:
NestedWeights

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:orientation="horizontal"

        style="?android:attr/buttonBarStyle">

        <Button

            android:id="@+id/b1"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:layout_margin="2dp"

            android:layout_weight="1"

            android:background="#093A3E"

            android:foreground="?attr/selectableItemBackground"

            android:text="One"

            android:textAllCaps="false"

            android:textColor="#fff"

            android:textSize="18sp"

            style="?android:attr/buttonBarButtonStyle" />

        <Button

            android:id="@+id/b2"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:layout_margin="2dp"

            android:layout_weight="1"

            android:background="#3AAFB9"

            android:foreground="?attr/selectableItemBackground"

            android:text="Two"

            android:textAllCaps="false"

            android:textColor="#fff"

            android:textSize="18sp"

            style="?android:attr/buttonBarButtonStyle" />

    </LinearLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"

        android:orientation="horizontal"

        style="?android:attr/buttonBarStyle">

        <Button

            android:id="@+id/b6"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:layout_margin="2dp"

            android:foreground="?attr/selectableItemBackground"

            android:layout_weight="1"

            android:background="#64E9EE"

            android:text="Three"

            android:textAllCaps="false"

            android:textColor="#fff"

            android:textSize="18sp"

            style="?android:attr/buttonBarButtonStyle" />

        <Button

            android:id="@+id/b7"

            android:layout_width="0dp"

            android:layout_height="match_parent"

            android:foreground="?attr/selectableItemBackground"

            android:layout_margin="2dp"

            android:layout_weight="1"

            android:background="#97C8EB"

            android:text="Four"

            android:textAllCaps="false"

            android:textColor="#fff"

            android:textSize="18sp"

            style="?android:attr/buttonBarButtonStyle" />

    </LinearLayout>

</LinearLayout>

Result:

How can I avoid this warning and get the same result? Thanks.

For better approach i posted the code below using ConstraintLayout

For your approach here is the solution
Remove from layouts android:layout_weight="1"

You should have reformat your code in the following order.

1. LinearLayout (root) orientation vertical (containing 2 other LinearLayouts)


2. LinearLayout (top, inside root) orientation horizontal ( with button weights to 1)


3. LinearLayout (bottom,inside root) orientation horizontal( with button weights to 1)

Better approach would be Using ConstraintLayout

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout 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">



<Button

    android:id="@+id/button2"

    android:layout_width="0dp"

    android:layout_height="0dp"

    android:layout_marginStart="8dp"

    android:layout_marginEnd="8dp"

    android:layout_marginBottom="8dp"

    android:text="1"

    app:layout_constraintBottom_toTopOf="@+id/button4"

    app:layout_constraintEnd_toStartOf="@+id/button3"

    app:layout_constraintStart_toStartOf="parent"

    app:layout_constraintTop_toTopOf="parent" />



<Button

    android:id="@+id/button5"

    android:layout_width="0dp"

    android:layout_height="0dp"

    android:layout_marginStart="8dp"

    android:layout_marginTop="8dp"

    android:layout_marginEnd="8dp"

    android:layout_marginBottom="8dp"

    android:text="4"

    app:layout_constraintBottom_toBottomOf="parent"

    app:layout_constraintEnd_toEndOf="parent"

    app:layout_constraintStart_toEndOf="@+id/button4"

    app:layout_constraintTop_toBottomOf="@+id/button3" />



<Button

    android:id="@+id/button4"

    android:layout_width="0dp"

    android:layout_height="0dp"

    android:layout_marginStart="8dp"

    android:layout_marginTop="8dp"

    android:layout_marginEnd="8dp"

    android:layout_marginBottom="8dp"

    android:text="3"

    app:layout_constraintBottom_toBottomOf="parent"

    app:layout_constraintEnd_toStartOf="@+id/button5"

    app:layout_constraintStart_toStartOf="parent"

    app:layout_constraintTop_toBottomOf="@+id/button2" />



<Button

    android:id="@+id/button3"

    android:layout_width="0dp"

    android:layout_height="0dp"

    android:layout_marginStart="8dp"

    android:layout_marginTop="8dp"

    android:layout_marginEnd="8dp"

    android:layout_marginBottom="8dp"

    android:text="2"

    app:layout_constraintBottom_toTopOf="@+id/button5"

    app:layout_constraintEnd_toEndOf="parent"

    app:layout_constraintStart_toEndOf="@+id/button2"

    app:layout_constraintTop_toTopOf="parent" />



  </android.support.constraint.ConstraintLayout>