ImageButton does not correctly display image background

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ImageButton does not correctly display image background

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#1 by (1 votes)

1

I have a school system with schedule of each course and I have an activity where the user must select his course to have access to his schedule. This activity has 5 imageButtons but these imageButtons are not being displayed properly, even though it has a transparent background in the image originally drawn, the background displayed in the app is a gray around the icon.

The activity xml code is this:

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

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/fundo_iff"
    android:orientation="vertical">


    <ImageButton
        android:id="@+id/botao_horario_informatica"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginLeft="112dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/ti"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/botao_horario_agropecuaria" />

    <ImageButton
        android:id="@+id/botao_horario_agroindustria"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="35dp"
        android:src="@drawable/ai"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageButton
        android:id="@+id/botao_horario_agropecuaria"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="35dp"
        android:src="@drawable/ap"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageButton
        android:id="@+id/botao_horario_quimica"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/tq"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/botao_horario_informatica"
        app:layout_constraintVertical_bias="0.0" />

    <ImageButton
        android:id="@+id/botao_horario_meio_ambiente"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/ma"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/botao_horario_informatica" />

    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        android:text="Integrado"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#000000"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

And the way it's appearing in the app is this:

android android-layout android-activity android-xml

asked by anonymous 03.08.2017 / 03:02

1 answer

I can not add a reference to my program end process

score 1 · Accepted Answer

This is the default% of background . You can change it by changing the imageButton attribute of the component itself. Some people use the background as android:background ( @null ) to remove the background from the view. It works, but it is not recommendable as it will cause you to lose the click effects in the view, which are the animations that occur when you press it.

To solve this problem, do this:

<ImageButton
        style="?attr/borderlessButtonStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:clickable="true"
        />

The click effect will be maintained, and the gray background will disappear.